added routes

go.mod

@@ -3,6 +3,7 @@ module git.paulbsd.com/paulbsd/vmail
 go 1.14
 
 require (
+	github.com/labstack/echo v3.3.10+incompatible // indirect
 	github.com/labstack/echo/v4 v4.1.16
 	github.com/lib/pq v1.7.0
 	github.com/mattn/go-sqlite3 v2.0.1+incompatible // indirect

go.sum

@@ -15,6 +15,7 @@ github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSs
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/denisenkom/go-mssqldb v0.0.0-20190707035753-2be1aa521ff4/go.mod h1:zAg7JM8CkOJ43xKXIj7eRO9kmWm/TW578qo+oDO6tuM=
+github.com/dgrijalva/jwt-go v3.2.0+incompatible h1:7qlOGliEKZXTDg6OTjfoBKDXWrumCAMpl/TFQ4/5kLM=
 github.com/dgrijalva/jwt-go v3.2.0+incompatible/go.mod h1:E3ru+11k8xSBh+hMPgOLZmtrrCbhqsmaPHjLKYnJCaQ=
 github.com/eapache/go-resiliency v1.1.0/go.mod h1:kFI+JgMyC7bLPUVY133qvEBtVayf5mFgVsvEsIPBvNs=
 github.com/eapache/go-xerial-snappy v0.0.0-20180814174437-776d5712da21/go.mod h1:+020luEh2TKB4/GOp8oxxtq0Daoen/Cii55CzbTV6DU=
@@ -60,6 +61,9 @@ github.com/kr/pretty v0.1.0/go.mod h1:dAy3ld7l9f0ibDNOQOHHMYYIIbhfbHSm3C4ZsoJORN
 github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=
 github.com/kr/text v0.1.0 h1:45sCR5RtlFHMR4UwH9sdQ5TC8v0qDQCHnXt+kaKSTVE=
 github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI=
+github.com/labstack/echo v1.4.4 h1:1bEiBNeGSUKxcPDGfZ/7IgdhJJZx8wV/pICJh4W2NJI=
+github.com/labstack/echo v3.3.10+incompatible h1:pGRcYk231ExFAyoAjAfD85kQzRJCRI8bbnE7CX5OEgg=
+github.com/labstack/echo v3.3.10+incompatible/go.mod h1:0INS7j/VjnFxD4E2wkz67b8cVwCLbBmJyDaka6Cmk1s=
 github.com/labstack/echo/v4 v4.1.16 h1:8swiwjE5Jkai3RPfZoahp8kjVCRNq+y7Q0hPji2Kz0o=
 github.com/labstack/echo/v4 v4.1.16/go.mod h1:awO+5TzAjvL8XpibdsfXxPgHr+orhtXZJZIQCVjogKI=
 github.com/labstack/gommon v0.3.0 h1:JEeO0bvc78PKdyHxloTKiF8BD5iGrH8T6MSeGvSgob0=

src/models/admin.go

@@ -8,8 +8,8 @@ import (
 )
 
 // GetAdmins ...
-func GetAdmins(ctx *context.Context, config *config.Config) (admin []Admin, err error) {
-	err = config.Db.Cols("username").Find(&admin)
+func GetAdmins(ctx *context.Context, config *config.Config) (admins []Admin, err error) {
+	err = config.Db.Cols("username").Find(&admins)
 	return
 }
 

src/models/alias.go

@@ -1,6 +1,17 @@
 package models
 
-import "time"
+import (
+	"context"
+	"time"
+
+	"git.paulbsd.com/paulbsd/vmail/src/config"
+)
+
+// GetAliases ...
+func GetAliases(ctx *context.Context, config *config.Config) (aliases []Alias, err error) {
+	err = config.Db.Cols("address").Find(&aliases)
+	return
+}
 
 // Alias defines the admin struct
 type Alias struct {

src/models/mailbox.go

@@ -1,6 +1,17 @@
 package models
 
-import "time"
+import (
+	"context"
+	"time"
+
+	"git.paulbsd.com/paulbsd/vmail/src/config"
+)
+
+// GetMailboxes ...
+func GetMailboxes(ctx *context.Context, config *config.Config) (mailboxes []Mailbox, err error) {
+	err = config.Db.Cols("username").Find(&mailboxes)
+	return
+}
 
 type Mailbox struct {
 	Username       string    `xorm:"not null pk unique index(mailbox_username_active) VARCHAR(255)"`

src/routers/main.go

@@ -9,6 +9,7 @@ import (
 	"git.paulbsd.com/paulbsd/vmail/src/models"
 
 	"github.com/labstack/echo/v4"
+	"github.com/labstack/echo/v4/middleware"
 )
 
 // RunServer runs the main echo server
@@ -16,11 +17,16 @@ func RunServer(ctx *context.Context, cfg *config.Config) (err error) {
 	e := echo.New()
 	e.HideBanner = true
 
+	e.Use(middleware.CORSWithConfig(middleware.CORSConfig{
+		AllowOrigins: []string{"http://localhost:8080"},
+		AllowMethods: []string{http.MethodGet, http.MethodPut, http.MethodPost, http.MethodDelete},
+	}))
+
 	e.GET("/", func(c echo.Context) (err error) {
 		return c.HTML(http.StatusOK, "Welcome to Vmail")
 	})
 	e.GET("menu", func(c echo.Context) (err error) {
-		ret := []string{"Admins", "Mailboxes", "Domains"}
+		ret := []string{"admins", "domains", "mailboxes"}
 		return c.JSON(http.StatusOK, ret)
 	})
 	e.POST("/auth", func(c echo.Context) (err error) {
@@ -30,15 +36,33 @@ func RunServer(ctx *context.Context, cfg *config.Config) (err error) {
 		return c.JSON(http.StatusOK, "/api")
 	})
 
-	e.GET("/api/admins", func(c echo.Context) (err error) {
+	e.GET("/api/admin", func(c echo.Context) (err error) {
 		admins, err := models.GetAdmins(ctx, cfg)
 		return c.JSON(http.StatusOK, admins)
 	})
-	e.GET("/api/admins/:id", func(c echo.Context) (err error) {
+	e.GET("/api/admin/:id", func(c echo.Context) (err error) {
 		admins, err := models.GetAdmins(ctx, cfg)
 		return c.JSON(http.StatusOK, admins)
 	})
 
+	e.GET("/api/mailbox", func(c echo.Context) (err error) {
+		mailboxes, err := models.GetMailboxes(ctx, cfg)
+		return c.JSON(http.StatusOK, mailboxes)
+	})
+	e.GET("/api/mailbox/:id", func(c echo.Context) (err error) {
+		mailboxes, err := models.GetMailboxes(ctx, cfg)
+		return c.JSON(http.StatusOK, mailboxes)
+	})
+
+	e.GET("/api/alias", func(c echo.Context) (err error) {
+		aliases, err := models.GetAliases(ctx, cfg)
+		return c.JSON(http.StatusOK, aliases)
+	})
+	e.GET("/api/alias/:id", func(c echo.Context) (err error) {
+		aliases, err := models.GetAliases(ctx, cfg)
+		return c.JSON(http.StatusOK, aliases)
+	})
+
 	e.Logger.Fatal(e.Start(fmt.Sprintf(":%d", cfg.Port)))
 	return
 }

vendor/github.com/dgrijalva/jwt-go/.gitignore

@@ -0,0 +1,4 @@
+.DS_Store
+bin
+
+

vendor/github.com/dgrijalva/jwt-go/.travis.yml

@@ -0,0 +1,13 @@
+language: go
+
+script:
+    - go vet ./...
+    - go test -v ./...
+
+go:
+  - 1.3
+  - 1.4
+  - 1.5
+  - 1.6
+  - 1.7
+  - tip

vendor/github.com/dgrijalva/jwt-go/LICENSE

@@ -0,0 +1,8 @@
+Copyright (c) 2012 Dave Grijalva
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+

vendor/github.com/dgrijalva/jwt-go/MIGRATION_GUIDE.md

@@ -0,0 +1,97 @@
+## Migration Guide from v2 -> v3
+
+Version 3 adds several new, frequently requested features.  To do so, it introduces a few breaking changes.  We've worked to keep these as minimal as possible.  This guide explains the breaking changes and how you can quickly update your code.
+
+### `Token.Claims` is now an interface type
+
+The most requested feature from the 2.0 verison of this library was the ability to provide a custom type to the JSON parser for claims. This was implemented by introducing a new interface, `Claims`, to replace `map[string]interface{}`.  We also included two concrete implementations of `Claims`: `MapClaims` and `StandardClaims`.
+
+`MapClaims` is an alias for `map[string]interface{}` with built in validation behavior.  It is the default claims type when using `Parse`.  The usage is unchanged except you must type cast the claims property.
+
+The old example for parsing a token looked like this..
+
+```go
+	if token, err := jwt.Parse(tokenString, keyLookupFunc); err == nil {
+		fmt.Printf("Token for user %v expires %v", token.Claims["user"], token.Claims["exp"])
+	}
+```
+
+is now directly mapped to...
+
+```go
+	if token, err := jwt.Parse(tokenString, keyLookupFunc); err == nil {
+		claims := token.Claims.(jwt.MapClaims)
+		fmt.Printf("Token for user %v expires %v", claims["user"], claims["exp"])
+	}
+```
+
+`StandardClaims` is designed to be embedded in your custom type.  You can supply a custom claims type with the new `ParseWithClaims` function.  Here's an example of using a custom claims type.
+
+```go
+	type MyCustomClaims struct {
+		User string
+		*StandardClaims
+	}
+	
+	if token, err := jwt.ParseWithClaims(tokenString, &MyCustomClaims{}, keyLookupFunc); err == nil {
+		claims := token.Claims.(*MyCustomClaims)
+		fmt.Printf("Token for user %v expires %v", claims.User, claims.StandardClaims.ExpiresAt)
+	}
+```
+
+### `ParseFromRequest` has been moved
+
+To keep this library focused on the tokens without becoming overburdened with complex request processing logic, `ParseFromRequest` and its new companion `ParseFromRequestWithClaims` have been moved to a subpackage, `request`.  The method signatues have also been augmented to receive a new argument: `Extractor`.
+
+`Extractors` do the work of picking the token string out of a request.  The interface is simple and composable.
+
+This simple parsing example:
+
+```go
+	if token, err := jwt.ParseFromRequest(tokenString, req, keyLookupFunc); err == nil {
+		fmt.Printf("Token for user %v expires %v", token.Claims["user"], token.Claims["exp"])
+	}
+```
+
+is directly mapped to:
+
+```go
+	if token, err := request.ParseFromRequest(req, request.OAuth2Extractor, keyLookupFunc); err == nil {
+		claims := token.Claims.(jwt.MapClaims)
+		fmt.Printf("Token for user %v expires %v", claims["user"], claims["exp"])
+	}
+```
+
+There are several concrete `Extractor` types provided for your convenience:
+
+* `HeaderExtractor` will search a list of headers until one contains content.
+* `ArgumentExtractor` will search a list of keys in request query and form arguments until one contains content.
+* `MultiExtractor` will try a list of `Extractors` in order until one returns content.
+* `AuthorizationHeaderExtractor` will look in the `Authorization` header for a `Bearer` token.
+* `OAuth2Extractor` searches the places an OAuth2 token would be specified (per the spec): `Authorization` header and `access_token` argument
+* `PostExtractionFilter` wraps an `Extractor`, allowing you to process the content before it's parsed.  A simple example is stripping the `Bearer ` text from a header
+
+
+### RSA signing methods no longer accept `[]byte` keys
+
+Due to a [critical vulnerability](https://auth0.com/blog/2015/03/31/critical-vulnerabilities-in-json-web-token-libraries/), we've decided the convenience of accepting `[]byte` instead of `rsa.PublicKey` or `rsa.PrivateKey` isn't worth the risk of misuse.
+
+To replace this behavior, we've added two helper methods: `ParseRSAPrivateKeyFromPEM(key []byte) (*rsa.PrivateKey, error)` and `ParseRSAPublicKeyFromPEM(key []byte) (*rsa.PublicKey, error)`.  These are just simple helpers for unpacking PEM encoded PKCS1 and PKCS8 keys. If your keys are encoded any other way, all you need to do is convert them to the `crypto/rsa` package's types.
+
+```go 
+	func keyLookupFunc(*Token) (interface{}, error) {
+		// Don't forget to validate the alg is what you expect:
+		if _, ok := token.Method.(*jwt.SigningMethodRSA); !ok {
+			return nil, fmt.Errorf("Unexpected signing method: %v", token.Header["alg"])
+		}
+		
+		// Look up key 
+		key, err := lookupPublicKey(token.Header["kid"])
+		if err != nil {
+			return nil, err
+		}
+		
+		// Unpack key from PEM encoded PKCS8
+		return jwt.ParseRSAPublicKeyFromPEM(key)
+	}
+```

vendor/github.com/dgrijalva/jwt-go/README.md

@@ -0,0 +1,100 @@
+# jwt-go
+
+[![Build Status](https://travis-ci.org/dgrijalva/jwt-go.svg?branch=master)](https://travis-ci.org/dgrijalva/jwt-go)
+[![GoDoc](https://godoc.org/github.com/dgrijalva/jwt-go?status.svg)](https://godoc.org/github.com/dgrijalva/jwt-go)
+
+A [go](http://www.golang.org) (or 'golang' for search engine friendliness) implementation of [JSON Web Tokens](http://self-issued.info/docs/draft-ietf-oauth-json-web-token.html)
+
+**NEW VERSION COMING:** There have been a lot of improvements suggested since the version 3.0.0 released in 2016. I'm working now on cutting two different releases: 3.2.0 will contain any non-breaking changes or enhancements. 4.0.0 will follow shortly which will include breaking changes. See the 4.0.0 milestone to get an idea of what's coming. If you have other ideas, or would like to participate in 4.0.0, now's the time. If you depend on this library and don't want to be interrupted, I recommend you use your dependency mangement tool to pin to version 3. 
+
+**SECURITY NOTICE:** Some older versions of Go have a security issue in the cryotp/elliptic. Recommendation is to upgrade to at least 1.8.3. See issue #216 for more detail.
+
+**SECURITY NOTICE:** It's important that you [validate the `alg` presented is what you expect](https://auth0.com/blog/2015/03/31/critical-vulnerabilities-in-json-web-token-libraries/). This library attempts to make it easy to do the right thing by requiring key types match the expected alg, but you should take the extra step to verify it in your usage.  See the examples provided.
+
+## What the heck is a JWT?
+
+JWT.io has [a great introduction](https://jwt.io/introduction) to JSON Web Tokens.
+
+In short, it's a signed JSON object that does something useful (for example, authentication).  It's commonly used for `Bearer` tokens in Oauth 2.  A token is made of three parts, separated by `.`'s.  The first two parts are JSON objects, that have been [base64url](http://tools.ietf.org/html/rfc4648) encoded.  The last part is the signature, encoded the same way.
+
+The first part is called the header.  It contains the necessary information for verifying the last part, the signature.  For example, which encryption method was used for signing and what key was used.
+
+The part in the middle is the interesting bit.  It's called the Claims and contains the actual stuff you care about.  Refer to [the RFC](http://self-issued.info/docs/draft-jones-json-web-token.html) for information about reserved keys and the proper way to add your own.
+
+## What's in the box?
+
+This library supports the parsing and verification as well as the generation and signing of JWTs.  Current supported signing algorithms are HMAC SHA, RSA, RSA-PSS, and ECDSA, though hooks are present for adding your own.
+
+## Examples
+
+See [the project documentation](https://godoc.org/github.com/dgrijalva/jwt-go) for examples of usage:
+
+* [Simple example of parsing and validating a token](https://godoc.org/github.com/dgrijalva/jwt-go#example-Parse--Hmac)
+* [Simple example of building and signing a token](https://godoc.org/github.com/dgrijalva/jwt-go#example-New--Hmac)
+* [Directory of Examples](https://godoc.org/github.com/dgrijalva/jwt-go#pkg-examples)
+
+## Extensions
+
+This library publishes all the necessary components for adding your own signing methods.  Simply implement the `SigningMethod` interface and register a factory method using `RegisterSigningMethod`.  
+
+Here's an example of an extension that integrates with the Google App Engine signing tools: https://github.com/someone1/gcp-jwt-go
+
+## Compliance
+
+This library was last reviewed to comply with [RTF 7519](http://www.rfc-editor.org/info/rfc7519) dated May 2015 with a few notable differences:
+
+* In order to protect against accidental use of [Unsecured JWTs](http://self-issued.info/docs/draft-ietf-oauth-json-web-token.html#UnsecuredJWT), tokens using `alg=none` will only be accepted if the constant `jwt.UnsafeAllowNoneSignatureType` is provided as the key.
+
+## Project Status & Versioning
+
+This library is considered production ready.  Feedback and feature requests are appreciated.  The API should be considered stable.  There should be very few backwards-incompatible changes outside of major version updates (and only with good reason).
+
+This project uses [Semantic Versioning 2.0.0](http://semver.org).  Accepted pull requests will land on `master`.  Periodically, versions will be tagged from `master`.  You can find all the releases on [the project releases page](https://github.com/dgrijalva/jwt-go/releases).
+
+While we try to make it obvious when we make breaking changes, there isn't a great mechanism for pushing announcements out to users.  You may want to use this alternative package include: `gopkg.in/dgrijalva/jwt-go.v3`.  It will do the right thing WRT semantic versioning.
+
+**BREAKING CHANGES:*** 
+* Version 3.0.0 includes _a lot_ of changes from the 2.x line, including a few that break the API.  We've tried to break as few things as possible, so there should just be a few type signature changes.  A full list of breaking changes is available in `VERSION_HISTORY.md`.  See `MIGRATION_GUIDE.md` for more information on updating your code.
+
+## Usage Tips
+
+### Signing vs Encryption
+
+A token is simply a JSON object that is signed by its author. this tells you exactly two things about the data:
+
+* The author of the token was in the possession of the signing secret
+* The data has not been modified since it was signed
+
+It's important to know that JWT does not provide encryption, which means anyone who has access to the token can read its contents. If you need to protect (encrypt) the data, there is a companion spec, `JWE`, that provides this functionality. JWE is currently outside the scope of this library.
+
+### Choosing a Signing Method
+
+There are several signing methods available, and you should probably take the time to learn about the various options before choosing one.  The principal design decision is most likely going to be symmetric vs asymmetric.
+
+Symmetric signing methods, such as HSA, use only a single secret. This is probably the simplest signing method to use since any `[]byte` can be used as a valid secret. They are also slightly computationally faster to use, though this rarely is enough to matter. Symmetric signing methods work the best when both producers and consumers of tokens are trusted, or even the same system. Since the same secret is used to both sign and validate tokens, you can't easily distribute the key for validation.
+
+Asymmetric signing methods, such as RSA, use different keys for signing and verifying tokens. This makes it possible to produce tokens with a private key, and allow any consumer to access the public key for verification.
+
+### Signing Methods and Key Types
+
+Each signing method expects a different object type for its signing keys. See the package documentation for details. Here are the most common ones:
+
+* The [HMAC signing method](https://godoc.org/github.com/dgrijalva/jwt-go#SigningMethodHMAC) (`HS256`,`HS384`,`HS512`) expect `[]byte` values for signing and validation
+* The [RSA signing method](https://godoc.org/github.com/dgrijalva/jwt-go#SigningMethodRSA) (`RS256`,`RS384`,`RS512`) expect `*rsa.PrivateKey` for signing and `*rsa.PublicKey` for validation
+* The [ECDSA signing method](https://godoc.org/github.com/dgrijalva/jwt-go#SigningMethodECDSA) (`ES256`,`ES384`,`ES512`) expect `*ecdsa.PrivateKey` for signing and `*ecdsa.PublicKey` for validation
+
+### JWT and OAuth
+
+It's worth mentioning that OAuth and JWT are not the same thing. A JWT token is simply a signed JSON object. It can be used anywhere such a thing is useful. There is some confusion, though, as JWT is the most common type of bearer token used in OAuth2 authentication.
+
+Without going too far down the rabbit hole, here's a description of the interaction of these technologies:
+
+* OAuth is a protocol for allowing an identity provider to be separate from the service a user is logging in to. For example, whenever you use Facebook to log into a different service (Yelp, Spotify, etc), you are using OAuth.
+* OAuth defines several options for passing around authentication data. One popular method is called a "bearer token". A bearer token is simply a string that _should_ only be held by an authenticated user. Thus, simply presenting this token proves your identity. You can probably derive from here why a JWT might make a good bearer token.
+* Because bearer tokens are used for authentication, it's important they're kept secret. This is why transactions that use bearer tokens typically happen over SSL.
+
+## More
+
+Documentation can be found [on godoc.org](http://godoc.org/github.com/dgrijalva/jwt-go).
+
+The command line utility included in this project (cmd/jwt) provides a straightforward example of token creation and parsing as well as a useful tool for debugging your own integration. You'll also find several implementation examples in the documentation.

vendor/github.com/dgrijalva/jwt-go/VERSION_HISTORY.md

@@ -0,0 +1,118 @@
+## `jwt-go` Version History
+
+#### 3.2.0
+
+* Added method `ParseUnverified` to allow users to split up the tasks of parsing and validation
+* HMAC signing method returns `ErrInvalidKeyType` instead of `ErrInvalidKey` where appropriate
+* Added options to `request.ParseFromRequest`, which allows for an arbitrary list of modifiers to parsing behavior. Initial set include `WithClaims` and `WithParser`. Existing usage of this function will continue to work as before.
+* Deprecated `ParseFromRequestWithClaims` to simplify API in the future.
+
+#### 3.1.0
+
+* Improvements to `jwt` command line tool
+* Added `SkipClaimsValidation` option to `Parser`
+* Documentation updates
+
+#### 3.0.0
+
+* **Compatibility Breaking Changes**: See MIGRATION_GUIDE.md for tips on updating your code
+	* Dropped support for `[]byte` keys when using RSA signing methods.  This convenience feature could contribute to security vulnerabilities involving mismatched key types with signing methods.
+	* `ParseFromRequest` has been moved to `request` subpackage and usage has changed
+	* The `Claims` property on `Token` is now type `Claims` instead of `map[string]interface{}`.  The default value is type `MapClaims`, which is an alias to `map[string]interface{}`.  This makes it possible to use a custom type when decoding claims.
+* Other Additions and Changes
+	* Added `Claims` interface type to allow users to decode the claims into a custom type
+	* Added `ParseWithClaims`, which takes a third argument of type `Claims`.  Use this function instead of `Parse` if you have a custom type you'd like to decode into.
+	* Dramatically improved the functionality and flexibility of `ParseFromRequest`, which is now in the `request` subpackage
+	* Added `ParseFromRequestWithClaims` which is the `FromRequest` equivalent of `ParseWithClaims`
+	* Added new interface type `Extractor`, which is used for extracting JWT strings from http requests.  Used with `ParseFromRequest` and `ParseFromRequestWithClaims`.
+	* Added several new, more specific, validation errors to error type bitmask
+	* Moved examples from README to executable example files
+	* Signing method registry is now thread safe
+	* Added new property to `ValidationError`, which contains the raw error returned by calls made by parse/verify (such as those returned by keyfunc or json parser)
+
+#### 2.7.0
+
+This will likely be the last backwards compatible release before 3.0.0, excluding essential bug fixes.
+
+* Added new option `-show` to the `jwt` command that will just output the decoded token without verifying
+* Error text for expired tokens includes how long it's been expired
+* Fixed incorrect error returned from `ParseRSAPublicKeyFromPEM`
+* Documentation updates
+
+#### 2.6.0
+
+* Exposed inner error within ValidationError
+* Fixed validation errors when using UseJSONNumber flag
+* Added several unit tests
+
+#### 2.5.0
+
+* Added support for signing method none.  You shouldn't use this.  The API tries to make this clear.
+* Updated/fixed some documentation
+* Added more helpful error message when trying to parse tokens that begin with `BEARER `
+
+#### 2.4.0
+
+* Added new type, Parser, to allow for configuration of various parsing parameters
+	* You can now specify a list of valid signing methods.  Anything outside this set will be rejected.
+	* You can now opt to use the `json.Number` type instead of `float64` when parsing token JSON
+* Added support for [Travis CI](https://travis-ci.org/dgrijalva/jwt-go)
+* Fixed some bugs with ECDSA parsing
+
+#### 2.3.0
+
+* Added support for ECDSA signing methods
+* Added support for RSA PSS signing methods (requires go v1.4)
+
+#### 2.2.0
+
+* Gracefully handle a `nil` `Keyfunc` being passed to `Parse`.  Result will now be the parsed token and an error, instead of a panic.
+
+#### 2.1.0
+
+Backwards compatible API change that was missed in 2.0.0.
+
+* The `SignedString` method on `Token` now takes `interface{}` instead of `[]byte`
+
+#### 2.0.0
+
+There were two major reasons for breaking backwards compatibility with this update.  The first was a refactor required to expand the width of the RSA and HMAC-SHA signing implementations.  There will likely be no required code changes to support this change.
+
+The second update, while unfortunately requiring a small change in integration, is required to open up this library to other signing methods.  Not all keys used for all signing methods have a single standard on-disk representation.  Requiring `[]byte` as the type for all keys proved too limiting.  Additionally, this implementation allows for pre-parsed tokens to be reused, which might matter in an application that parses a high volume of tokens with a small set of keys.  Backwards compatibilty has been maintained for passing `[]byte` to the RSA signing methods, but they will also accept `*rsa.PublicKey` and `*rsa.PrivateKey`.
+
+It is likely the only integration change required here will be to change `func(t *jwt.Token) ([]byte, error)` to `func(t *jwt.Token) (interface{}, error)` when calling `Parse`.
+
+* **Compatibility Breaking Changes**
+	* `SigningMethodHS256` is now `*SigningMethodHMAC` instead of `type struct`
+	* `SigningMethodRS256` is now `*SigningMethodRSA` instead of `type struct`
+	* `KeyFunc` now returns `interface{}` instead of `[]byte`
+	* `SigningMethod.Sign` now takes `interface{}` instead of `[]byte` for the key
+	* `SigningMethod.Verify` now takes `interface{}` instead of `[]byte` for the key
+* Renamed type `SigningMethodHS256` to `SigningMethodHMAC`.  Specific sizes are now just instances of this type.
+    * Added public package global `SigningMethodHS256`
+    * Added public package global `SigningMethodHS384`
+    * Added public package global `SigningMethodHS512`
+* Renamed type `SigningMethodRS256` to `SigningMethodRSA`.  Specific sizes are now just instances of this type.
+    * Added public package global `SigningMethodRS256`
+    * Added public package global `SigningMethodRS384`
+    * Added public package global `SigningMethodRS512`
+* Moved sample private key for HMAC tests from an inline value to a file on disk.  Value is unchanged.
+* Refactored the RSA implementation to be easier to read
+* Exposed helper methods `ParseRSAPrivateKeyFromPEM` and `ParseRSAPublicKeyFromPEM`
+
+#### 1.0.2
+
+* Fixed bug in parsing public keys from certificates
+* Added more tests around the parsing of keys for RS256
+* Code refactoring in RS256 implementation.  No functional changes
+
+#### 1.0.1
+
+* Fixed panic if RS256 signing method was passed an invalid key
+
+#### 1.0.0
+
+* First versioned release
+* API stabilized
+* Supports creating, signing, parsing, and validating JWT tokens
+* Supports RS256 and HS256 signing methods

vendor/github.com/dgrijalva/jwt-go/claims.go

@@ -0,0 +1,134 @@
+package jwt
+
+import (
+	"crypto/subtle"
+	"fmt"
+	"time"
+)
+
+// For a type to be a Claims object, it must just have a Valid method that determines
+// if the token is invalid for any supported reason
+type Claims interface {
+	Valid() error
+}
+
+// Structured version of Claims Section, as referenced at
+// https://tools.ietf.org/html/rfc7519#section-4.1
+// See examples for how to use this with your own claim types
+type StandardClaims struct {
+	Audience  string `json:"aud,omitempty"`
+	ExpiresAt int64  `json:"exp,omitempty"`
+	Id        string `json:"jti,omitempty"`
+	IssuedAt  int64  `json:"iat,omitempty"`
+	Issuer    string `json:"iss,omitempty"`
+	NotBefore int64  `json:"nbf,omitempty"`
+	Subject   string `json:"sub,omitempty"`
+}
+
+// Validates time based claims "exp, iat, nbf".
+// There is no accounting for clock skew.
+// As well, if any of the above claims are not in the token, it will still
+// be considered a valid claim.
+func (c StandardClaims) Valid() error {
+	vErr := new(ValidationError)
+	now := TimeFunc().Unix()
+
+	// The claims below are optional, by default, so if they are set to the
+	// default value in Go, let's not fail the verification for them.
+	if c.VerifyExpiresAt(now, false) == false {
+		delta := time.Unix(now, 0).Sub(time.Unix(c.ExpiresAt, 0))
+		vErr.Inner = fmt.Errorf("token is expired by %v", delta)
+		vErr.Errors |= ValidationErrorExpired
+	}
+
+	if c.VerifyIssuedAt(now, false) == false {
+		vErr.Inner = fmt.Errorf("Token used before issued")
+		vErr.Errors |= ValidationErrorIssuedAt
+	}
+
+	if c.VerifyNotBefore(now, false) == false {
+		vErr.Inner = fmt.Errorf("token is not valid yet")
+		vErr.Errors |= ValidationErrorNotValidYet
+	}
+
+	if vErr.valid() {
+		return nil
+	}
+
+	return vErr
+}
+
+// Compares the aud claim against cmp.
+// If required is false, this method will return true if the value matches or is unset
+func (c *StandardClaims) VerifyAudience(cmp string, req bool) bool {
+	return verifyAud(c.Audience, cmp, req)
+}
+
+// Compares the exp claim against cmp.
+// If required is false, this method will return true if the value matches or is unset
+func (c *StandardClaims) VerifyExpiresAt(cmp int64, req bool) bool {
+	return verifyExp(c.ExpiresAt, cmp, req)
+}
+
+// Compares the iat claim against cmp.
+// If required is false, this method will return true if the value matches or is unset
+func (c *StandardClaims) VerifyIssuedAt(cmp int64, req bool) bool {
+	return verifyIat(c.IssuedAt, cmp, req)
+}
+
+// Compares the iss claim against cmp.
+// If required is false, this method will return true if the value matches or is unset
+func (c *StandardClaims) VerifyIssuer(cmp string, req bool) bool {
+	return verifyIss(c.Issuer, cmp, req)
+}
+
+// Compares the nbf claim against cmp.
+// If required is false, this method will return true if the value matches or is unset
+func (c *StandardClaims) VerifyNotBefore(cmp int64, req bool) bool {
+	return verifyNbf(c.NotBefore, cmp, req)
+}
+
+// ----- helpers
+
+func verifyAud(aud string, cmp string, required bool) bool {
+	if aud == "" {
+		return !required
+	}
+	if subtle.ConstantTimeCompare([]byte(aud), []byte(cmp)) != 0 {
+		return true
+	} else {
+		return false
+	}
+}
+
+func verifyExp(exp int64, now int64, required bool) bool {
+	if exp == 0 {
+		return !required
+	}
+	return now <= exp
+}
+
+func verifyIat(iat int64, now int64, required bool) bool {
+	if iat == 0 {
+		return !required
+	}
+	return now >= iat
+}
+
+func verifyIss(iss string, cmp string, required bool) bool {
+	if iss == "" {
+		return !required
+	}
+	if subtle.ConstantTimeCompare([]byte(iss), []byte(cmp)) != 0 {
+		return true
+	} else {
+		return false
+	}
+}
+
+func verifyNbf(nbf int64, now int64, required bool) bool {
+	if nbf == 0 {
+		return !required
+	}
+	return now >= nbf
+}

vendor/github.com/dgrijalva/jwt-go/doc.go

@@ -0,0 +1,4 @@
+// Package jwt is a Go implementation of JSON Web Tokens: http://self-issued.info/docs/draft-jones-json-web-token.html
+//
+// See README.md for more info.
+package jwt

vendor/github.com/dgrijalva/jwt-go/ecdsa.go

@@ -0,0 +1,148 @@
+package jwt
+
+import (
+	"crypto"
+	"crypto/ecdsa"
+	"crypto/rand"
+	"errors"
+	"math/big"
+)
+
+var (
+	// Sadly this is missing from crypto/ecdsa compared to crypto/rsa
+	ErrECDSAVerification = errors.New("crypto/ecdsa: verification error")
+)
+
+// Implements the ECDSA family of signing methods signing methods
+// Expects *ecdsa.PrivateKey for signing and *ecdsa.PublicKey for verification
+type SigningMethodECDSA struct {
+	Name      string
+	Hash      crypto.Hash
+	KeySize   int
+	CurveBits int
+}
+
+// Specific instances for EC256 and company
+var (
+	SigningMethodES256 *SigningMethodECDSA
+	SigningMethodES384 *SigningMethodECDSA
+	SigningMethodES512 *SigningMethodECDSA
+)
+
+func init() {
+	// ES256
+	SigningMethodES256 = &SigningMethodECDSA{"ES256", crypto.SHA256, 32, 256}
+	RegisterSigningMethod(SigningMethodES256.Alg(), func() SigningMethod {
+		return SigningMethodES256
+	})
+
+	// ES384
+	SigningMethodES384 = &SigningMethodECDSA{"ES384", crypto.SHA384, 48, 384}
+	RegisterSigningMethod(SigningMethodES384.Alg(), func() SigningMethod {
+		return SigningMethodES384
+	})
+
+	// ES512
+	SigningMethodES512 = &SigningMethodECDSA{"ES512", crypto.SHA512, 66, 521}
+	RegisterSigningMethod(SigningMethodES512.Alg(), func() SigningMethod {
+		return SigningMethodES512
+	})
+}
+
+func (m *SigningMethodECDSA) Alg() string {
+	return m.Name
+}
+
+// Implements the Verify method from SigningMethod
+// For this verify method, key must be an ecdsa.PublicKey struct
+func (m *SigningMethodECDSA) Verify(signingString, signature string, key interface{}) error {
+	var err error
+
+	// Decode the signature
+	var sig []byte
+	if sig, err = DecodeSegment(signature); err != nil {
+		return err
+	}
+
+	// Get the key
+	var ecdsaKey *ecdsa.PublicKey
+	switch k := key.(type) {
+	case *ecdsa.PublicKey:
+		ecdsaKey = k
+	default:
+		return ErrInvalidKeyType
+	}
+
+	if len(sig) != 2*m.KeySize {
+		return ErrECDSAVerification
+	}
+
+	r := big.NewInt(0).SetBytes(sig[:m.KeySize])
+	s := big.NewInt(0).SetBytes(sig[m.KeySize:])
+
+	// Create hasher
+	if !m.Hash.Available() {
+		return ErrHashUnavailable
+	}
+	hasher := m.Hash.New()
+	hasher.Write([]byte(signingString))
+
+	// Verify the signature
+	if verifystatus := ecdsa.Verify(ecdsaKey, hasher.Sum(nil), r, s); verifystatus == true {
+		return nil
+	} else {
+		return ErrECDSAVerification
+	}
+}
+
+// Implements the Sign method from SigningMethod
+// For this signing method, key must be an ecdsa.PrivateKey struct
+func (m *SigningMethodECDSA) Sign(signingString string, key interface{}) (string, error) {
+	// Get the key
+	var ecdsaKey *ecdsa.PrivateKey
+	switch k := key.(type) {
+	case *ecdsa.PrivateKey:
+		ecdsaKey = k
+	default:
+		return "", ErrInvalidKeyType
+	}
+
+	// Create the hasher
+	if !m.Hash.Available() {
+		return "", ErrHashUnavailable
+	}
+
+	hasher := m.Hash.New()
+	hasher.Write([]byte(signingString))
+
+	// Sign the string and return r, s
+	if r, s, err := ecdsa.Sign(rand.Reader, ecdsaKey, hasher.Sum(nil)); err == nil {
+		curveBits := ecdsaKey.Curve.Params().BitSize
+
+		if m.CurveBits != curveBits {
+			return "", ErrInvalidKey
+		}
+
+		keyBytes := curveBits / 8
+		if curveBits%8 > 0 {
+			keyBytes += 1
+		}
+
+		// We serialize the outpus (r and s) into big-endian byte arrays and pad
+		// them with zeros on the left to make sure the sizes work out. Both arrays
+		// must be keyBytes long, and the output must be 2*keyBytes long.
+		rBytes := r.Bytes()
+		rBytesPadded := make([]byte, keyBytes)
+		copy(rBytesPadded[keyBytes-len(rBytes):], rBytes)
+
+		sBytes := s.Bytes()
+		sBytesPadded := make([]byte, keyBytes)
+		copy(sBytesPadded[keyBytes-len(sBytes):], sBytes)
+
+		out := append(rBytesPadded, sBytesPadded...)
+
+		return EncodeSegment(out), nil
+	} else {
+		return "", err
+	}
+}

vendor/github.com/dgrijalva/jwt-go/ecdsa_utils.go

@@ -0,0 +1,67 @@
+package jwt
+
+import (
+	"crypto/ecdsa"
+	"crypto/x509"
+	"encoding/pem"
+	"errors"
+)
+
+var (
+	ErrNotECPublicKey  = errors.New("Key is not a valid ECDSA public key")
+	ErrNotECPrivateKey = errors.New("Key is not a valid ECDSA private key")
+)
+
+// Parse PEM encoded Elliptic Curve Private Key Structure
+func ParseECPrivateKeyFromPEM(key []byte) (*ecdsa.PrivateKey, error) {
+	var err error
+
+	// Parse PEM block
+	var block *pem.Block
+	if block, _ = pem.Decode(key); block == nil {
+		return nil, ErrKeyMustBePEMEncoded
+	}
+
+	// Parse the key
+	var parsedKey interface{}
+	if parsedKey, err = x509.ParseECPrivateKey(block.Bytes); err != nil {
+		return nil, err
+	}
+
+	var pkey *ecdsa.PrivateKey
+	var ok bool
+	if pkey, ok = parsedKey.(*ecdsa.PrivateKey); !ok {
+		return nil, ErrNotECPrivateKey
+	}
+
+	return pkey, nil
+}
+
+// Parse PEM encoded PKCS1 or PKCS8 public key
+func ParseECPublicKeyFromPEM(key []byte) (*ecdsa.PublicKey, error) {
+	var err error
+
+	// Parse PEM block
+	var block *pem.Block
+	if block, _ = pem.Decode(key); block == nil {
+		return nil, ErrKeyMustBePEMEncoded
+	}
+
+	// Parse the key
+	var parsedKey interface{}
+	if parsedKey, err = x509.ParsePKIXPublicKey(block.Bytes); err != nil {
+		if cert, err := x509.ParseCertificate(block.Bytes); err == nil {
+			parsedKey = cert.PublicKey
+		} else {
+			return nil, err
+		}
+	}
+
+	var pkey *ecdsa.PublicKey
+	var ok bool
+	if pkey, ok = parsedKey.(*ecdsa.PublicKey); !ok {
+		return nil, ErrNotECPublicKey
+	}
+
+	return pkey, nil
+}

vendor/github.com/dgrijalva/jwt-go/errors.go

@@ -0,0 +1,59 @@
+package jwt
+
+import (
+	"errors"
+)
+
+// Error constants
+var (
+	ErrInvalidKey      = errors.New("key is invalid")
+	ErrInvalidKeyType  = errors.New("key is of invalid type")
+	ErrHashUnavailable = errors.New("the requested hash function is unavailable")
+)
+
+// The errors that might occur when parsing and validating a token
+const (
+	ValidationErrorMalformed        uint32 = 1 << iota // Token is malformed
+	ValidationErrorUnverifiable                        // Token could not be verified because of signing problems
+	ValidationErrorSignatureInvalid                    // Signature validation failed
+
+	// Standard Claim validation errors
+	ValidationErrorAudience      // AUD validation failed
+	ValidationErrorExpired       // EXP validation failed
+	ValidationErrorIssuedAt      // IAT validation failed
+	ValidationErrorIssuer        // ISS validation failed
+	ValidationErrorNotValidYet   // NBF validation failed
+	ValidationErrorId            // JTI validation failed
+	ValidationErrorClaimsInvalid // Generic claims validation error
+)
+
+// Helper for constructing a ValidationError with a string error message
+func NewValidationError(errorText string, errorFlags uint32) *ValidationError {
+	return &ValidationError{
+		text:   errorText,
+		Errors: errorFlags,
+	}
+}
+
+// The error from Parse if token is not valid
+type ValidationError struct {
+	Inner  error  // stores the error returned by external dependencies, i.e.: KeyFunc
+	Errors uint32 // bitfield.  see ValidationError... constants
+	text   string // errors that do not have a valid error just have text
+}
+
+// Validation error is an error type
+func (e ValidationError) Error() string {
+	if e.Inner != nil {
+		return e.Inner.Error()
+	} else if e.text != "" {
+		return e.text
+	} else {
+		return "token is invalid"
+	}
+}
+
+// No errors
+func (e *ValidationError) valid() bool {
+	return e.Errors == 0
+}

vendor/github.com/dgrijalva/jwt-go/hmac.go

@@ -0,0 +1,95 @@
+package jwt
+
+import (
+	"crypto"
+	"crypto/hmac"
+	"errors"
+)
+
+// Implements the HMAC-SHA family of signing methods signing methods
+// Expects key type of []byte for both signing and validation
+type SigningMethodHMAC struct {
+	Name string
+	Hash crypto.Hash
+}
+
+// Specific instances for HS256 and company
+var (
+	SigningMethodHS256  *SigningMethodHMAC
+	SigningMethodHS384  *SigningMethodHMAC
+	SigningMethodHS512  *SigningMethodHMAC
+	ErrSignatureInvalid = errors.New("signature is invalid")
+)
+
+func init() {
+	// HS256
+	SigningMethodHS256 = &SigningMethodHMAC{"HS256", crypto.SHA256}
+	RegisterSigningMethod(SigningMethodHS256.Alg(), func() SigningMethod {
+		return SigningMethodHS256
+	})
+
+	// HS384
+	SigningMethodHS384 = &SigningMethodHMAC{"HS384", crypto.SHA384}
+	RegisterSigningMethod(SigningMethodHS384.Alg(), func() SigningMethod {
+		return SigningMethodHS384
+	})
+
+	// HS512
+	SigningMethodHS512 = &SigningMethodHMAC{"HS512", crypto.SHA512}
+	RegisterSigningMethod(SigningMethodHS512.Alg(), func() SigningMethod {
+		return SigningMethodHS512
+	})
+}
+
+func (m *SigningMethodHMAC) Alg() string {
+	return m.Name
+}
+
+// Verify the signature of HSXXX tokens.  Returns nil if the signature is valid.
+func (m *SigningMethodHMAC) Verify(signingString, signature string, key interface{}) error {
+	// Verify the key is the right type
+	keyBytes, ok := key.([]byte)
+	if !ok {
+		return ErrInvalidKeyType
+	}
+
+	// Decode signature, for comparison
+	sig, err := DecodeSegment(signature)
+	if err != nil {
+		return err
+	}
+
+	// Can we use the specified hashing method?
+	if !m.Hash.Available() {
+		return ErrHashUnavailable
+	}
+
+	// This signing method is symmetric, so we validate the signature
+	// by reproducing the signature from the signing string and key, then
+	// comparing that against the provided signature.
+	hasher := hmac.New(m.Hash.New, keyBytes)
+	hasher.Write([]byte(signingString))
+	if !hmac.Equal(sig, hasher.Sum(nil)) {
+		return ErrSignatureInvalid
+	}
+
+	// No validation errors.  Signature is good.
+	return nil
+}
+
+// Implements the Sign method from SigningMethod for this signing method.
+// Key must be []byte
+func (m *SigningMethodHMAC) Sign(signingString string, key interface{}) (string, error) {
+	if keyBytes, ok := key.([]byte); ok {
+		if !m.Hash.Available() {
+			return "", ErrHashUnavailable
+		}
+
+		hasher := hmac.New(m.Hash.New, keyBytes)
+		hasher.Write([]byte(signingString))
+
+		return EncodeSegment(hasher.Sum(nil)), nil
+	}
+
+	return "", ErrInvalidKeyType
+}

vendor/github.com/dgrijalva/jwt-go/map_claims.go

@@ -0,0 +1,94 @@
+package jwt
+
+import (
+	"encoding/json"
+	"errors"
+	// "fmt"
+)
+
+// Claims type that uses the map[string]interface{} for JSON decoding
+// This is the default claims type if you don't supply one
+type MapClaims map[string]interface{}
+
+// Compares the aud claim against cmp.
+// If required is false, this method will return true if the value matches or is unset
+func (m MapClaims) VerifyAudience(cmp string, req bool) bool {
+	aud, _ := m["aud"].(string)
+	return verifyAud(aud, cmp, req)
+}
+
+// Compares the exp claim against cmp.
+// If required is false, this method will return true if the value matches or is unset
+func (m MapClaims) VerifyExpiresAt(cmp int64, req bool) bool {
+	switch exp := m["exp"].(type) {
+	case float64:
+		return verifyExp(int64(exp), cmp, req)
+	case json.Number:
+		v, _ := exp.Int64()
+		return verifyExp(v, cmp, req)
+	}
+	return req == false
+}
+
+// Compares the iat claim against cmp.
+// If required is false, this method will return true if the value matches or is unset
+func (m MapClaims) VerifyIssuedAt(cmp int64, req bool) bool {
+	switch iat := m["iat"].(type) {
+	case float64:
+		return verifyIat(int64(iat), cmp, req)
+	case json.Number:
+		v, _ := iat.Int64()
+		return verifyIat(v, cmp, req)
+	}
+	return req == false
+}
+
+// Compares the iss claim against cmp.
+// If required is false, this method will return true if the value matches or is unset
+func (m MapClaims) VerifyIssuer(cmp string, req bool) bool {
+	iss, _ := m["iss"].(string)
+	return verifyIss(iss, cmp, req)
+}
+
+// Compares the nbf claim against cmp.
+// If required is false, this method will return true if the value matches or is unset
+func (m MapClaims) VerifyNotBefore(cmp int64, req bool) bool {
+	switch nbf := m["nbf"].(type) {
+	case float64:
+		return verifyNbf(int64(nbf), cmp, req)
+	case json.Number:
+		v, _ := nbf.Int64()
+		return verifyNbf(v, cmp, req)
+	}
+	return req == false
+}
+
+// Validates time based claims "exp, iat, nbf".
+// There is no accounting for clock skew.
+// As well, if any of the above claims are not in the token, it will still
+// be considered a valid claim.
+func (m MapClaims) Valid() error {
+	vErr := new(ValidationError)
+	now := TimeFunc().Unix()
+
+	if m.VerifyExpiresAt(now, false) == false {
+		vErr.Inner = errors.New("Token is expired")
+		vErr.Errors |= ValidationErrorExpired
+	}
+
+	if m.VerifyIssuedAt(now, false) == false {
+		vErr.Inner = errors.New("Token used before issued")
+		vErr.Errors |= ValidationErrorIssuedAt
+	}
+
+	if m.VerifyNotBefore(now, false) == false {
+		vErr.Inner = errors.New("Token is not valid yet")
+		vErr.Errors |= ValidationErrorNotValidYet
+	}
+
+	if vErr.valid() {
+		return nil
+	}
+
+	return vErr
+}

vendor/github.com/dgrijalva/jwt-go/none.go

@@ -0,0 +1,52 @@
+package jwt
+
+// Implements the none signing method.  This is required by the spec
+// but you probably should never use it.
+var SigningMethodNone *signingMethodNone
+
+const UnsafeAllowNoneSignatureType unsafeNoneMagicConstant = "none signing method allowed"
+
+var NoneSignatureTypeDisallowedError error
+
+type signingMethodNone struct{}
+type unsafeNoneMagicConstant string
+
+func init() {
+	SigningMethodNone = &signingMethodNone{}
+	NoneSignatureTypeDisallowedError = NewValidationError("'none' signature type is not allowed", ValidationErrorSignatureInvalid)
+
+	RegisterSigningMethod(SigningMethodNone.Alg(), func() SigningMethod {
+		return SigningMethodNone
+	})
+}
+
+func (m *signingMethodNone) Alg() string {
+	return "none"
+}
+
+// Only allow 'none' alg type if UnsafeAllowNoneSignatureType is specified as the key
+func (m *signingMethodNone) Verify(signingString, signature string, key interface{}) (err error) {
+	// Key must be UnsafeAllowNoneSignatureType to prevent accidentally
+	// accepting 'none' signing method
+	if _, ok := key.(unsafeNoneMagicConstant); !ok {
+		return NoneSignatureTypeDisallowedError
+	}
+	// If signing method is none, signature must be an empty string
+	if signature != "" {
+		return NewValidationError(
+			"'none' signing method with non-empty signature",
+			ValidationErrorSignatureInvalid,
+		)
+	}
+
+	// Accept 'none' signing method.
+	return nil
+}
+
+// Only allow 'none' signing if UnsafeAllowNoneSignatureType is specified as the key
+func (m *signingMethodNone) Sign(signingString string, key interface{}) (string, error) {
+	if _, ok := key.(unsafeNoneMagicConstant); ok {
+		return "", nil
+	}
+	return "", NoneSignatureTypeDisallowedError
+}

vendor/github.com/dgrijalva/jwt-go/parser.go

@@ -0,0 +1,148 @@
+package jwt
+
+import (
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"strings"
+)
+
+type Parser struct {
+	ValidMethods         []string // If populated, only these methods will be considered valid
+	UseJSONNumber        bool     // Use JSON Number format in JSON decoder
+	SkipClaimsValidation bool     // Skip claims validation during token parsing
+}
+
+// Parse, validate, and return a token.
+// keyFunc will receive the parsed token and should return the key for validating.
+// If everything is kosher, err will be nil
+func (p *Parser) Parse(tokenString string, keyFunc Keyfunc) (*Token, error) {
+	return p.ParseWithClaims(tokenString, MapClaims{}, keyFunc)
+}
+
+func (p *Parser) ParseWithClaims(tokenString string, claims Claims, keyFunc Keyfunc) (*Token, error) {
+	token, parts, err := p.ParseUnverified(tokenString, claims)
+	if err != nil {
+		return token, err
+	}
+
+	// Verify signing method is in the required set
+	if p.ValidMethods != nil {
+		var signingMethodValid = false
+		var alg = token.Method.Alg()
+		for _, m := range p.ValidMethods {
+			if m == alg {
+				signingMethodValid = true
+				break
+			}
+		}
+		if !signingMethodValid {
+			// signing method is not in the listed set
+			return token, NewValidationError(fmt.Sprintf("signing method %v is invalid", alg), ValidationErrorSignatureInvalid)
+		}
+	}
+
+	// Lookup key
+	var key interface{}
+	if keyFunc == nil {
+		// keyFunc was not provided.  short circuiting validation
+		return token, NewValidationError("no Keyfunc was provided.", ValidationErrorUnverifiable)
+	}
+	if key, err = keyFunc(token); err != nil {
+		// keyFunc returned an error
+		if ve, ok := err.(*ValidationError); ok {
+			return token, ve
+		}
+		return token, &ValidationError{Inner: err, Errors: ValidationErrorUnverifiable}
+	}
+
+	vErr := &ValidationError{}
+
+	// Validate Claims
+	if !p.SkipClaimsValidation {
+		if err := token.Claims.Valid(); err != nil {
+
+			// If the Claims Valid returned an error, check if it is a validation error,
+			// If it was another error type, create a ValidationError with a generic ClaimsInvalid flag set
+			if e, ok := err.(*ValidationError); !ok {
+				vErr = &ValidationError{Inner: err, Errors: ValidationErrorClaimsInvalid}
+			} else {
+				vErr = e
+			}
+		}
+	}
+
+	// Perform validation
+	token.Signature = parts[2]
+	if err = token.Method.Verify(strings.Join(parts[0:2], "."), token.Signature, key); err != nil {
+		vErr.Inner = err
+		vErr.Errors |= ValidationErrorSignatureInvalid
+	}
+
+	if vErr.valid() {
+		token.Valid = true
+		return token, nil
+	}
+
+	return token, vErr
+}
+
+// WARNING: Don't use this method unless you know what you're doing
+//
+// This method parses the token but doesn't validate the signature. It's only
+// ever useful in cases where you know the signature is valid (because it has
+// been checked previously in the stack) and you want to extract values from
+// it.
+func (p *Parser) ParseUnverified(tokenString string, claims Claims) (token *Token, parts []string, err error) {
+	parts = strings.Split(tokenString, ".")
+	if len(parts) != 3 {
+		return nil, parts, NewValidationError("token contains an invalid number of segments", ValidationErrorMalformed)
+	}
+
+	token = &Token{Raw: tokenString}
+
+	// parse Header
+	var headerBytes []byte
+	if headerBytes, err = DecodeSegment(parts[0]); err != nil {
+		if strings.HasPrefix(strings.ToLower(tokenString), "bearer ") {
+			return token, parts, NewValidationError("tokenstring should not contain 'bearer '", ValidationErrorMalformed)
+		}
+		return token, parts, &ValidationError{Inner: err, Errors: ValidationErrorMalformed}
+	}
+	if err = json.Unmarshal(headerBytes, &token.Header); err != nil {
+		return token, parts, &ValidationError{Inner: err, Errors: ValidationErrorMalformed}
+	}
+
+	// parse Claims
+	var claimBytes []byte
+	token.Claims = claims
+
+	if claimBytes, err = DecodeSegment(parts[1]); err != nil {
+		return token, parts, &ValidationError{Inner: err, Errors: ValidationErrorMalformed}
+	}
+	dec := json.NewDecoder(bytes.NewBuffer(claimBytes))
+	if p.UseJSONNumber {
+		dec.UseNumber()
+	}
+	// JSON Decode.  Special case for map type to avoid weird pointer behavior
+	if c, ok := token.Claims.(MapClaims); ok {
+		err = dec.Decode(&c)
+	} else {
+		err = dec.Decode(&claims)
+	}
+	// Handle decode error
+	if err != nil {
+		return token, parts, &ValidationError{Inner: err, Errors: ValidationErrorMalformed}
+	}
+
+	// Lookup signature method
+	if method, ok := token.Header["alg"].(string); ok {
+		if token.Method = GetSigningMethod(method); token.Method == nil {
+			return token, parts, NewValidationError("signing method (alg) is unavailable.", ValidationErrorUnverifiable)
+		}
+	} else {
+		return token, parts, NewValidationError("signing method (alg) is unspecified.", ValidationErrorUnverifiable)
+	}
+
+	return token, parts, nil
+}

vendor/github.com/dgrijalva/jwt-go/rsa.go

@@ -0,0 +1,101 @@
+package jwt
+
+import (
+	"crypto"
+	"crypto/rand"
+	"crypto/rsa"
+)
+
+// Implements the RSA family of signing methods signing methods
+// Expects *rsa.PrivateKey for signing and *rsa.PublicKey for validation
+type SigningMethodRSA struct {
+	Name string
+	Hash crypto.Hash
+}
+
+// Specific instances for RS256 and company
+var (
+	SigningMethodRS256 *SigningMethodRSA
+	SigningMethodRS384 *SigningMethodRSA
+	SigningMethodRS512 *SigningMethodRSA
+)
+
+func init() {
+	// RS256
+	SigningMethodRS256 = &SigningMethodRSA{"RS256", crypto.SHA256}
+	RegisterSigningMethod(SigningMethodRS256.Alg(), func() SigningMethod {
+		return SigningMethodRS256
+	})
+
+	// RS384
+	SigningMethodRS384 = &SigningMethodRSA{"RS384", crypto.SHA384}
+	RegisterSigningMethod(SigningMethodRS384.Alg(), func() SigningMethod {
+		return SigningMethodRS384
+	})
+
+	// RS512
+	SigningMethodRS512 = &SigningMethodRSA{"RS512", crypto.SHA512}
+	RegisterSigningMethod(SigningMethodRS512.Alg(), func() SigningMethod {
+		return SigningMethodRS512
+	})
+}
+
+func (m *SigningMethodRSA) Alg() string {
+	return m.Name
+}
+
+// Implements the Verify method from SigningMethod
+// For this signing method, must be an *rsa.PublicKey structure.
+func (m *SigningMethodRSA) Verify(signingString, signature string, key interface{}) error {
+	var err error
+
+	// Decode the signature
+	var sig []byte
+	if sig, err = DecodeSegment(signature); err != nil {
+		return err
+	}
+
+	var rsaKey *rsa.PublicKey
+	var ok bool
+
+	if rsaKey, ok = key.(*rsa.PublicKey); !ok {
+		return ErrInvalidKeyType
+	}
+
+	// Create hasher
+	if !m.Hash.Available() {
+		return ErrHashUnavailable
+	}
+	hasher := m.Hash.New()
+	hasher.Write([]byte(signingString))
+
+	// Verify the signature
+	return rsa.VerifyPKCS1v15(rsaKey, m.Hash, hasher.Sum(nil), sig)
+}
+
+// Implements the Sign method from SigningMethod
+// For this signing method, must be an *rsa.PrivateKey structure.
+func (m *SigningMethodRSA) Sign(signingString string, key interface{}) (string, error) {
+	var rsaKey *rsa.PrivateKey
+	var ok bool
+
+	// Validate type of key
+	if rsaKey, ok = key.(*rsa.PrivateKey); !ok {
+		return "", ErrInvalidKey
+	}
+
+	// Create the hasher
+	if !m.Hash.Available() {
+		return "", ErrHashUnavailable
+	}
+
+	hasher := m.Hash.New()
+	hasher.Write([]byte(signingString))
+
+	// Sign the string and return the encoded bytes
+	if sigBytes, err := rsa.SignPKCS1v15(rand.Reader, rsaKey, m.Hash, hasher.Sum(nil)); err == nil {
+		return EncodeSegment(sigBytes), nil
+	} else {
+		return "", err
+	}
+}

vendor/github.com/dgrijalva/jwt-go/rsa_pss.go

@@ -0,0 +1,126 @@
+// +build go1.4
+
+package jwt
+
+import (
+	"crypto"
+	"crypto/rand"
+	"crypto/rsa"
+)
+
+// Implements the RSAPSS family of signing methods signing methods
+type SigningMethodRSAPSS struct {
+	*SigningMethodRSA
+	Options *rsa.PSSOptions
+}
+
+// Specific instances for RS/PS and company
+var (
+	SigningMethodPS256 *SigningMethodRSAPSS
+	SigningMethodPS384 *SigningMethodRSAPSS
+	SigningMethodPS512 *SigningMethodRSAPSS
+)
+
+func init() {
+	// PS256
+	SigningMethodPS256 = &SigningMethodRSAPSS{
+		&SigningMethodRSA{
+			Name: "PS256",
+			Hash: crypto.SHA256,
+		},
+		&rsa.PSSOptions{
+			SaltLength: rsa.PSSSaltLengthAuto,
+			Hash:       crypto.SHA256,
+		},
+	}
+	RegisterSigningMethod(SigningMethodPS256.Alg(), func() SigningMethod {
+		return SigningMethodPS256
+	})
+
+	// PS384
+	SigningMethodPS384 = &SigningMethodRSAPSS{
+		&SigningMethodRSA{
+			Name: "PS384",
+			Hash: crypto.SHA384,
+		},
+		&rsa.PSSOptions{
+			SaltLength: rsa.PSSSaltLengthAuto,
+			Hash:       crypto.SHA384,
+		},
+	}
+	RegisterSigningMethod(SigningMethodPS384.Alg(), func() SigningMethod {
+		return SigningMethodPS384
+	})
+
+	// PS512
+	SigningMethodPS512 = &SigningMethodRSAPSS{
+		&SigningMethodRSA{
+			Name: "PS512",
+			Hash: crypto.SHA512,
+		},
+		&rsa.PSSOptions{
+			SaltLength: rsa.PSSSaltLengthAuto,
+			Hash:       crypto.SHA512,
+		},
+	}
+	RegisterSigningMethod(SigningMethodPS512.Alg(), func() SigningMethod {
+		return SigningMethodPS512
+	})
+}
+
+// Implements the Verify method from SigningMethod
+// For this verify method, key must be an rsa.PublicKey struct
+func (m *SigningMethodRSAPSS) Verify(signingString, signature string, key interface{}) error {
+	var err error
+
+	// Decode the signature
+	var sig []byte
+	if sig, err = DecodeSegment(signature); err != nil {
+		return err
+	}
+
+	var rsaKey *rsa.PublicKey
+	switch k := key.(type) {
+	case *rsa.PublicKey:
+		rsaKey = k
+	default:
+		return ErrInvalidKey
+	}
+
+	// Create hasher
+	if !m.Hash.Available() {
+		return ErrHashUnavailable
+	}
+	hasher := m.Hash.New()
+	hasher.Write([]byte(signingString))
+
+	return rsa.VerifyPSS(rsaKey, m.Hash, hasher.Sum(nil), sig, m.Options)
+}
+
+// Implements the Sign method from SigningMethod
+// For this signing method, key must be an rsa.PrivateKey struct
+func (m *SigningMethodRSAPSS) Sign(signingString string, key interface{}) (string, error) {
+	var rsaKey *rsa.PrivateKey
+
+	switch k := key.(type) {
+	case *rsa.PrivateKey:
+		rsaKey = k
+	default:
+		return "", ErrInvalidKeyType
+	}
+
+	// Create the hasher
+	if !m.Hash.Available() {
+		return "", ErrHashUnavailable
+	}
+
+	hasher := m.Hash.New()
+	hasher.Write([]byte(signingString))
+
+	// Sign the string and return the encoded bytes
+	if sigBytes, err := rsa.SignPSS(rand.Reader, rsaKey, m.Hash, hasher.Sum(nil), m.Options); err == nil {
+		return EncodeSegment(sigBytes), nil
+	} else {
+		return "", err
+	}
+}

vendor/github.com/dgrijalva/jwt-go/rsa_utils.go

@@ -0,0 +1,101 @@
+package jwt
+
+import (
+	"crypto/rsa"
+	"crypto/x509"
+	"encoding/pem"
+	"errors"
+)
+
+var (
+	ErrKeyMustBePEMEncoded = errors.New("Invalid Key: Key must be PEM encoded PKCS1 or PKCS8 private key")
+	ErrNotRSAPrivateKey    = errors.New("Key is not a valid RSA private key")
+	ErrNotRSAPublicKey     = errors.New("Key is not a valid RSA public key")
+)
+
+// Parse PEM encoded PKCS1 or PKCS8 private key
+func ParseRSAPrivateKeyFromPEM(key []byte) (*rsa.PrivateKey, error) {
+	var err error
+
+	// Parse PEM block
+	var block *pem.Block
+	if block, _ = pem.Decode(key); block == nil {
+		return nil, ErrKeyMustBePEMEncoded
+	}
+
+	var parsedKey interface{}
+	if parsedKey, err = x509.ParsePKCS1PrivateKey(block.Bytes); err != nil {
+		if parsedKey, err = x509.ParsePKCS8PrivateKey(block.Bytes); err != nil {
+			return nil, err
+		}
+	}
+
+	var pkey *rsa.PrivateKey
+	var ok bool
+	if pkey, ok = parsedKey.(*rsa.PrivateKey); !ok {
+		return nil, ErrNotRSAPrivateKey
+	}
+
+	return pkey, nil
+}
+
+// Parse PEM encoded PKCS1 or PKCS8 private key protected with password
+func ParseRSAPrivateKeyFromPEMWithPassword(key []byte, password string) (*rsa.PrivateKey, error) {
+	var err error
+
+	// Parse PEM block
+	var block *pem.Block
+	if block, _ = pem.Decode(key); block == nil {
+		return nil, ErrKeyMustBePEMEncoded
+	}
+
+	var parsedKey interface{}
+
+	var blockDecrypted []byte
+	if blockDecrypted, err = x509.DecryptPEMBlock(block, []byte(password)); err != nil {
+		return nil, err
+	}
+
+	if parsedKey, err = x509.ParsePKCS1PrivateKey(blockDecrypted); err != nil {
+		if parsedKey, err = x509.ParsePKCS8PrivateKey(blockDecrypted); err != nil {
+			return nil, err
+		}
+	}
+
+	var pkey *rsa.PrivateKey
+	var ok bool
+	if pkey, ok = parsedKey.(*rsa.PrivateKey); !ok {
+		return nil, ErrNotRSAPrivateKey
+	}
+
+	return pkey, nil
+}
+
+// Parse PEM encoded PKCS1 or PKCS8 public key
+func ParseRSAPublicKeyFromPEM(key []byte) (*rsa.PublicKey, error) {
+	var err error
+
+	// Parse PEM block
+	var block *pem.Block
+	if block, _ = pem.Decode(key); block == nil {
+		return nil, ErrKeyMustBePEMEncoded
+	}
+
+	// Parse the key
+	var parsedKey interface{}
+	if parsedKey, err = x509.ParsePKIXPublicKey(block.Bytes); err != nil {
+		if cert, err := x509.ParseCertificate(block.Bytes); err == nil {
+			parsedKey = cert.PublicKey
+		} else {
+			return nil, err
+		}
+	}
+
+	var pkey *rsa.PublicKey
+	var ok bool
+	if pkey, ok = parsedKey.(*rsa.PublicKey); !ok {
+		return nil, ErrNotRSAPublicKey
+	}
+
+	return pkey, nil
+}

vendor/github.com/dgrijalva/jwt-go/signing_method.go

@@ -0,0 +1,35 @@
+package jwt
+
+import (
+	"sync"
+)
+
+var signingMethods = map[string]func() SigningMethod{}
+var signingMethodLock = new(sync.RWMutex)
+
+// Implement SigningMethod to add new methods for signing or verifying tokens.
+type SigningMethod interface {
+	Verify(signingString, signature string, key interface{}) error // Returns nil if signature is valid
+	Sign(signingString string, key interface{}) (string, error)    // Returns encoded signature or error
+	Alg() string                                                   // returns the alg identifier for this method (example: 'HS256')
+}
+
+// Register the "alg" name and a factory function for signing method.
+// This is typically done during init() in the method's implementation
+func RegisterSigningMethod(alg string, f func() SigningMethod) {
+	signingMethodLock.Lock()
+	defer signingMethodLock.Unlock()
+
+	signingMethods[alg] = f
+}
+
+// Get a signing method from an "alg" string
+func GetSigningMethod(alg string) (method SigningMethod) {
+	signingMethodLock.RLock()
+	defer signingMethodLock.RUnlock()
+
+	if methodF, ok := signingMethods[alg]; ok {
+		method = methodF()
+	}
+	return
+}

vendor/github.com/dgrijalva/jwt-go/token.go

@@ -0,0 +1,108 @@
+package jwt
+
+import (
+	"encoding/base64"
+	"encoding/json"
+	"strings"
+	"time"
+)
+
+// TimeFunc provides the current time when parsing token to validate "exp" claim (expiration time).
+// You can override it to use another time value.  This is useful for testing or if your
+// server uses a different time zone than your tokens.
+var TimeFunc = time.Now
+
+// Parse methods use this callback function to supply
+// the key for verification.  The function receives the parsed,
+// but unverified Token.  This allows you to use properties in the
+// Header of the token (such as `kid`) to identify which key to use.
+type Keyfunc func(*Token) (interface{}, error)
+
+// A JWT Token.  Different fields will be used depending on whether you're
+// creating or parsing/verifying a token.
+type Token struct {
+	Raw       string                 // The raw token.  Populated when you Parse a token
+	Method    SigningMethod          // The signing method used or to be used
+	Header    map[string]interface{} // The first segment of the token
+	Claims    Claims                 // The second segment of the token
+	Signature string                 // The third segment of the token.  Populated when you Parse a token
+	Valid     bool                   // Is the token valid?  Populated when you Parse/Verify a token
+}
+
+// Create a new Token.  Takes a signing method
+func New(method SigningMethod) *Token {
+	return NewWithClaims(method, MapClaims{})
+}
+
+func NewWithClaims(method SigningMethod, claims Claims) *Token {
+	return &Token{
+		Header: map[string]interface{}{
+			"typ": "JWT",
+			"alg": method.Alg(),
+		},
+		Claims: claims,
+		Method: method,
+	}
+}
+
+// Get the complete, signed token
+func (t *Token) SignedString(key interface{}) (string, error) {
+	var sig, sstr string
+	var err error
+	if sstr, err = t.SigningString(); err != nil {
+		return "", err
+	}
+	if sig, err = t.Method.Sign(sstr, key); err != nil {
+		return "", err
+	}
+	return strings.Join([]string{sstr, sig}, "."), nil
+}
+
+// Generate the signing string.  This is the
+// most expensive part of the whole deal.  Unless you
+// need this for something special, just go straight for
+// the SignedString.
+func (t *Token) SigningString() (string, error) {
+	var err error
+	parts := make([]string, 2)
+	for i, _ := range parts {
+		var jsonValue []byte
+		if i == 0 {
+			if jsonValue, err = json.Marshal(t.Header); err != nil {
+				return "", err
+			}
+		} else {
+			if jsonValue, err = json.Marshal(t.Claims); err != nil {
+				return "", err
+			}
+		}
+
+		parts[i] = EncodeSegment(jsonValue)
+	}
+	return strings.Join(parts, "."), nil
+}
+
+// Parse, validate, and return a token.
+// keyFunc will receive the parsed token and should return the key for validating.
+// If everything is kosher, err will be nil
+func Parse(tokenString string, keyFunc Keyfunc) (*Token, error) {
+	return new(Parser).Parse(tokenString, keyFunc)
+}
+
+func ParseWithClaims(tokenString string, claims Claims, keyFunc Keyfunc) (*Token, error) {
+	return new(Parser).ParseWithClaims(tokenString, claims, keyFunc)
+}
+
+// Encode JWT specific base64url encoding with padding stripped
+func EncodeSegment(seg []byte) string {
+	return strings.TrimRight(base64.URLEncoding.EncodeToString(seg), "=")
+}
+
+// Decode JWT specific base64url encoding with padding stripped
+func DecodeSegment(seg string) ([]byte, error) {
+	if l := len(seg) % 4; l > 0 {
+		seg += strings.Repeat("=", 4-l)
+	}
+
+	return base64.URLEncoding.DecodeString(seg)
+}

vendor/github.com/labstack/echo/v4/middleware/basic_auth.go

@@ -0,0 +1,106 @@
+package middleware
+
+import (
+	"encoding/base64"
+	"strconv"
+	"strings"
+
+	"github.com/labstack/echo/v4"
+)
+
+type (
+	// BasicAuthConfig defines the config for BasicAuth middleware.
+	BasicAuthConfig struct {
+		// Skipper defines a function to skip middleware.
+		Skipper Skipper
+
+		// Validator is a function to validate BasicAuth credentials.
+		// Required.
+		Validator BasicAuthValidator
+
+		// Realm is a string to define realm attribute of BasicAuth.
+		// Default value "Restricted".
+		Realm string
+	}
+
+	// BasicAuthValidator defines a function to validate BasicAuth credentials.
+	BasicAuthValidator func(string, string, echo.Context) (bool, error)
+)
+
+const (
+	basic        = "basic"
+	defaultRealm = "Restricted"
+)
+
+var (
+	// DefaultBasicAuthConfig is the default BasicAuth middleware config.
+	DefaultBasicAuthConfig = BasicAuthConfig{
+		Skipper: DefaultSkipper,
+		Realm:   defaultRealm,
+	}
+)
+
+// BasicAuth returns an BasicAuth middleware.
+//
+// For valid credentials it calls the next handler.
+// For missing or invalid credentials, it sends "401 - Unauthorized" response.
+func BasicAuth(fn BasicAuthValidator) echo.MiddlewareFunc {
+	c := DefaultBasicAuthConfig
+	c.Validator = fn
+	return BasicAuthWithConfig(c)
+}
+
+// BasicAuthWithConfig returns an BasicAuth middleware with config.
+// See `BasicAuth()`.
+func BasicAuthWithConfig(config BasicAuthConfig) echo.MiddlewareFunc {
+	// Defaults
+	if config.Validator == nil {
+		panic("echo: basic-auth middleware requires a validator function")
+	}
+	if config.Skipper == nil {
+		config.Skipper = DefaultBasicAuthConfig.Skipper
+	}
+	if config.Realm == "" {
+		config.Realm = defaultRealm
+	}
+
+	return func(next echo.HandlerFunc) echo.HandlerFunc {
+		return func(c echo.Context) error {
+			if config.Skipper(c) {
+				return next(c)
+			}
+
+			auth := c.Request().Header.Get(echo.HeaderAuthorization)
+			l := len(basic)
+
+			if len(auth) > l+1 && strings.ToLower(auth[:l]) == basic {
+				b, err := base64.StdEncoding.DecodeString(auth[l+1:])
+				if err != nil {
+					return err
+				}
+				cred := string(b)
+				for i := 0; i < len(cred); i++ {
+					if cred[i] == ':' {
+						// Verify credentials
+						valid, err := config.Validator(cred[:i], cred[i+1:], c)
+						if err != nil {
+							return err
+						} else if valid {
+							return next(c)
+						}
+						break
+					}
+				}
+			}
+
+			realm := defaultRealm
+			if config.Realm != defaultRealm {
+				realm = strconv.Quote(config.Realm)
+			}
+
+			// Need to return `401` for browsers to pop-up login box.
+			c.Response().Header().Set(echo.HeaderWWWAuthenticate, basic+" realm="+realm)
+			return echo.ErrUnauthorized
+		}
+	}
+}

vendor/github.com/labstack/echo/v4/middleware/body_dump.go

@@ -0,0 +1,107 @@
+package middleware
+
+import (
+	"bufio"
+	"bytes"
+	"io"
+	"io/ioutil"
+	"net"
+	"net/http"
+
+	"github.com/labstack/echo/v4"
+)
+
+type (
+	// BodyDumpConfig defines the config for BodyDump middleware.
+	BodyDumpConfig struct {
+		// Skipper defines a function to skip middleware.
+		Skipper Skipper
+
+		// Handler receives request and response payload.
+		// Required.
+		Handler BodyDumpHandler
+	}
+
+	// BodyDumpHandler receives the request and response payload.
+	BodyDumpHandler func(echo.Context, []byte, []byte)
+
+	bodyDumpResponseWriter struct {
+		io.Writer
+		http.ResponseWriter
+	}
+)
+
+var (
+	// DefaultBodyDumpConfig is the default BodyDump middleware config.
+	DefaultBodyDumpConfig = BodyDumpConfig{
+		Skipper: DefaultSkipper,
+	}
+)
+
+// BodyDump returns a BodyDump middleware.
+//
+// BodyDump middleware captures the request and response payload and calls the
+// registered handler.
+func BodyDump(handler BodyDumpHandler) echo.MiddlewareFunc {
+	c := DefaultBodyDumpConfig
+	c.Handler = handler
+	return BodyDumpWithConfig(c)
+}
+
+// BodyDumpWithConfig returns a BodyDump middleware with config.
+// See: `BodyDump()`.
+func BodyDumpWithConfig(config BodyDumpConfig) echo.MiddlewareFunc {
+	// Defaults
+	if config.Handler == nil {
+		panic("echo: body-dump middleware requires a handler function")
+	}
+	if config.Skipper == nil {
+		config.Skipper = DefaultBodyDumpConfig.Skipper
+	}
+
+	return func(next echo.HandlerFunc) echo.HandlerFunc {
+		return func(c echo.Context) (err error) {
+			if config.Skipper(c) {
+				return next(c)
+			}
+
+			// Request
+			reqBody := []byte{}
+			if c.Request().Body != nil { // Read
+				reqBody, _ = ioutil.ReadAll(c.Request().Body)
+			}
+			c.Request().Body = ioutil.NopCloser(bytes.NewBuffer(reqBody)) // Reset
+
+			// Response
+			resBody := new(bytes.Buffer)
+			mw := io.MultiWriter(c.Response().Writer, resBody)
+			writer := &bodyDumpResponseWriter{Writer: mw, ResponseWriter: c.Response().Writer}
+			c.Response().Writer = writer
+
+			if err = next(c); err != nil {
+				c.Error(err)
+			}
+
+			// Callback
+			config.Handler(c, reqBody, resBody.Bytes())
+
+			return
+		}
+	}
+}
+
+func (w *bodyDumpResponseWriter) WriteHeader(code int) {
+	w.ResponseWriter.WriteHeader(code)
+}
+
+func (w *bodyDumpResponseWriter) Write(b []byte) (int, error) {
+	return w.Writer.Write(b)
+}
+
+func (w *bodyDumpResponseWriter) Flush() {
+	w.ResponseWriter.(http.Flusher).Flush()
+}
+
+func (w *bodyDumpResponseWriter) Hijack() (net.Conn, *bufio.ReadWriter, error) {
+	return w.ResponseWriter.(http.Hijacker).Hijack()
+}

vendor/github.com/labstack/echo/v4/middleware/body_limit.go

@@ -0,0 +1,117 @@
+package middleware
+
+import (
+	"fmt"
+	"io"
+	"sync"
+
+	"github.com/labstack/echo/v4"
+	"github.com/labstack/gommon/bytes"
+)
+
+type (
+	// BodyLimitConfig defines the config for BodyLimit middleware.
+	BodyLimitConfig struct {
+		// Skipper defines a function to skip middleware.
+		Skipper Skipper
+
+		// Maximum allowed size for a request body, it can be specified
+		// as `4x` or `4xB`, where x is one of the multiple from K, M, G, T or P.
+		Limit string `yaml:"limit"`
+		limit int64
+	}
+
+	limitedReader struct {
+		BodyLimitConfig
+		reader  io.ReadCloser
+		read    int64
+		context echo.Context
+	}
+)
+
+var (
+	// DefaultBodyLimitConfig is the default BodyLimit middleware config.
+	DefaultBodyLimitConfig = BodyLimitConfig{
+		Skipper: DefaultSkipper,
+	}
+)
+
+// BodyLimit returns a BodyLimit middleware.
+//
+// BodyLimit middleware sets the maximum allowed size for a request body, if the
+// size exceeds the configured limit, it sends "413 - Request Entity Too Large"
+// response. The BodyLimit is determined based on both `Content-Length` request
+// header and actual content read, which makes it super secure.
+// Limit can be specified as `4x` or `4xB`, where x is one of the multiple from K, M,
+// G, T or P.
+func BodyLimit(limit string) echo.MiddlewareFunc {
+	c := DefaultBodyLimitConfig
+	c.Limit = limit
+	return BodyLimitWithConfig(c)
+}
+
+// BodyLimitWithConfig returns a BodyLimit middleware with config.
+// See: `BodyLimit()`.
+func BodyLimitWithConfig(config BodyLimitConfig) echo.MiddlewareFunc {
+	// Defaults
+	if config.Skipper == nil {
+		config.Skipper = DefaultBodyLimitConfig.Skipper
+	}
+
+	limit, err := bytes.Parse(config.Limit)
+	if err != nil {
+		panic(fmt.Errorf("echo: invalid body-limit=%s", config.Limit))
+	}
+	config.limit = limit
+	pool := limitedReaderPool(config)
+
+	return func(next echo.HandlerFunc) echo.HandlerFunc {
+		return func(c echo.Context) error {
+			if config.Skipper(c) {
+				return next(c)
+			}
+
+			req := c.Request()
+
+			// Based on content length
+			if req.ContentLength > config.limit {
+				return echo.ErrStatusRequestEntityTooLarge
+			}
+
+			// Based on content read
+			r := pool.Get().(*limitedReader)
+			r.Reset(req.Body, c)
+			defer pool.Put(r)
+			req.Body = r
+
+			return next(c)
+		}
+	}
+}
+
+func (r *limitedReader) Read(b []byte) (n int, err error) {
+	n, err = r.reader.Read(b)
+	r.read += int64(n)
+	if r.read > r.limit {
+		return n, echo.ErrStatusRequestEntityTooLarge
+	}
+	return
+}
+
+func (r *limitedReader) Close() error {
+	return r.reader.Close()
+}
+
+func (r *limitedReader) Reset(reader io.ReadCloser, context echo.Context) {
+	r.reader = reader
+	r.context = context
+	r.read = 0
+}
+
+func limitedReaderPool(c BodyLimitConfig) sync.Pool {
+	return sync.Pool{
+		New: func() interface{} {
+			return &limitedReader{BodyLimitConfig: c}
+		},
+	}
+}

vendor/github.com/labstack/echo/v4/middleware/compress.go

@@ -0,0 +1,121 @@
+package middleware
+
+import (
+	"bufio"
+	"compress/gzip"
+	"io"
+	"io/ioutil"
+	"net"
+	"net/http"
+	"strings"
+
+	"github.com/labstack/echo/v4"
+)
+
+type (
+	// GzipConfig defines the config for Gzip middleware.
+	GzipConfig struct {
+		// Skipper defines a function to skip middleware.
+		Skipper Skipper
+
+		// Gzip compression level.
+		// Optional. Default value -1.
+		Level int `yaml:"level"`
+	}
+
+	gzipResponseWriter struct {
+		io.Writer
+		http.ResponseWriter
+	}
+)
+
+const (
+	gzipScheme = "gzip"
+)
+
+var (
+	// DefaultGzipConfig is the default Gzip middleware config.
+	DefaultGzipConfig = GzipConfig{
+		Skipper: DefaultSkipper,
+		Level:   -1,
+	}
+)
+
+// Gzip returns a middleware which compresses HTTP response using gzip compression
+// scheme.
+func Gzip() echo.MiddlewareFunc {
+	return GzipWithConfig(DefaultGzipConfig)
+}
+
+// GzipWithConfig return Gzip middleware with config.
+// See: `Gzip()`.
+func GzipWithConfig(config GzipConfig) echo.MiddlewareFunc {
+	// Defaults
+	if config.Skipper == nil {
+		config.Skipper = DefaultGzipConfig.Skipper
+	}
+	if config.Level == 0 {
+		config.Level = DefaultGzipConfig.Level
+	}
+
+	return func(next echo.HandlerFunc) echo.HandlerFunc {
+		return func(c echo.Context) error {
+			if config.Skipper(c) {
+				return next(c)
+			}
+
+			res := c.Response()
+			res.Header().Add(echo.HeaderVary, echo.HeaderAcceptEncoding)
+			if strings.Contains(c.Request().Header.Get(echo.HeaderAcceptEncoding), gzipScheme) {
+				res.Header().Set(echo.HeaderContentEncoding, gzipScheme) // Issue #806
+				rw := res.Writer
+				w, err := gzip.NewWriterLevel(rw, config.Level)
+				if err != nil {
+					return err
+				}
+				defer func() {
+					if res.Size == 0 {
+						if res.Header().Get(echo.HeaderContentEncoding) == gzipScheme {
+							res.Header().Del(echo.HeaderContentEncoding)
+						}
+						// We have to reset response to it's pristine state when
+						// nothing is written to body or error is returned.
+						// See issue #424, #407.
+						res.Writer = rw
+						w.Reset(ioutil.Discard)
+					}
+					w.Close()
+				}()
+				grw := &gzipResponseWriter{Writer: w, ResponseWriter: rw}
+				res.Writer = grw
+			}
+			return next(c)
+		}
+	}
+}
+
+func (w *gzipResponseWriter) WriteHeader(code int) {
+	if code == http.StatusNoContent { // Issue #489
+		w.ResponseWriter.Header().Del(echo.HeaderContentEncoding)
+	}
+	w.Header().Del(echo.HeaderContentLength) // Issue #444
+	w.ResponseWriter.WriteHeader(code)
+}
+
+func (w *gzipResponseWriter) Write(b []byte) (int, error) {
+	if w.Header().Get(echo.HeaderContentType) == "" {
+		w.Header().Set(echo.HeaderContentType, http.DetectContentType(b))
+	}
+	return w.Writer.Write(b)
+}
+
+func (w *gzipResponseWriter) Flush() {
+	w.Writer.(*gzip.Writer).Flush()
+	if flusher, ok := w.ResponseWriter.(http.Flusher); ok {
+		flusher.Flush()
+	}
+}
+
+func (w *gzipResponseWriter) Hijack() (net.Conn, *bufio.ReadWriter, error) {
+	return w.ResponseWriter.(http.Hijacker).Hijack()
+}

vendor/github.com/labstack/echo/v4/middleware/cors.go

@@ -0,0 +1,147 @@
+package middleware
+
+import (
+	"net/http"
+	"strconv"
+	"strings"
+
+	"github.com/labstack/echo/v4"
+)
+
+type (
+	// CORSConfig defines the config for CORS middleware.
+	CORSConfig struct {
+		// Skipper defines a function to skip middleware.
+		Skipper Skipper
+
+		// AllowOrigin defines a list of origins that may access the resource.
+		// Optional. Default value []string{"*"}.
+		AllowOrigins []string `yaml:"allow_origins"`
+
+		// AllowMethods defines a list methods allowed when accessing the resource.
+		// This is used in response to a preflight request.
+		// Optional. Default value DefaultCORSConfig.AllowMethods.
+		AllowMethods []string `yaml:"allow_methods"`
+
+		// AllowHeaders defines a list of request headers that can be used when
+		// making the actual request. This is in response to a preflight request.
+		// Optional. Default value []string{}.
+		AllowHeaders []string `yaml:"allow_headers"`
+
+		// AllowCredentials indicates whether or not the response to the request
+		// can be exposed when the credentials flag is true. When used as part of
+		// a response to a preflight request, this indicates whether or not the
+		// actual request can be made using credentials.
+		// Optional. Default value false.
+		AllowCredentials bool `yaml:"allow_credentials"`
+
+		// ExposeHeaders defines a whitelist headers that clients are allowed to
+		// access.
+		// Optional. Default value []string{}.
+		ExposeHeaders []string `yaml:"expose_headers"`
+
+		// MaxAge indicates how long (in seconds) the results of a preflight request
+		// can be cached.
+		// Optional. Default value 0.
+		MaxAge int `yaml:"max_age"`
+	}
+)
+
+var (
+	// DefaultCORSConfig is the default CORS middleware config.
+	DefaultCORSConfig = CORSConfig{
+		Skipper:      DefaultSkipper,
+		AllowOrigins: []string{"*"},
+		AllowMethods: []string{http.MethodGet, http.MethodHead, http.MethodPut, http.MethodPatch, http.MethodPost, http.MethodDelete},
+	}
+)
+
+// CORS returns a Cross-Origin Resource Sharing (CORS) middleware.
+// See: https://developer.mozilla.org/en/docs/Web/HTTP/Access_control_CORS
+func CORS() echo.MiddlewareFunc {
+	return CORSWithConfig(DefaultCORSConfig)
+}
+
+// CORSWithConfig returns a CORS middleware with config.
+// See: `CORS()`.
+func CORSWithConfig(config CORSConfig) echo.MiddlewareFunc {
+	// Defaults
+	if config.Skipper == nil {
+		config.Skipper = DefaultCORSConfig.Skipper
+	}
+	if len(config.AllowOrigins) == 0 {
+		config.AllowOrigins = DefaultCORSConfig.AllowOrigins
+	}
+	if len(config.AllowMethods) == 0 {
+		config.AllowMethods = DefaultCORSConfig.AllowMethods
+	}
+
+	allowMethods := strings.Join(config.AllowMethods, ",")
+	allowHeaders := strings.Join(config.AllowHeaders, ",")
+	exposeHeaders := strings.Join(config.ExposeHeaders, ",")
+	maxAge := strconv.Itoa(config.MaxAge)
+
+	return func(next echo.HandlerFunc) echo.HandlerFunc {
+		return func(c echo.Context) error {
+			if config.Skipper(c) {
+				return next(c)
+			}
+
+			req := c.Request()
+			res := c.Response()
+			origin := req.Header.Get(echo.HeaderOrigin)
+			allowOrigin := ""
+
+			// Check allowed origins
+			for _, o := range config.AllowOrigins {
+				if o == "*" && config.AllowCredentials {
+					allowOrigin = origin
+					break
+				}
+				if o == "*" || o == origin {
+					allowOrigin = o
+					break
+				}
+				if matchSubdomain(origin, o) {
+					allowOrigin = origin
+					break
+				}
+			}
+
+			// Simple request
+			if req.Method != http.MethodOptions {
+				res.Header().Add(echo.HeaderVary, echo.HeaderOrigin)
+				res.Header().Set(echo.HeaderAccessControlAllowOrigin, allowOrigin)
+				if config.AllowCredentials {
+					res.Header().Set(echo.HeaderAccessControlAllowCredentials, "true")
+				}
+				if exposeHeaders != "" {
+					res.Header().Set(echo.HeaderAccessControlExposeHeaders, exposeHeaders)
+				}
+				return next(c)
+			}
+
+			// Preflight request
+			res.Header().Add(echo.HeaderVary, echo.HeaderOrigin)
+			res.Header().Add(echo.HeaderVary, echo.HeaderAccessControlRequestMethod)
+			res.Header().Add(echo.HeaderVary, echo.HeaderAccessControlRequestHeaders)
+			res.Header().Set(echo.HeaderAccessControlAllowOrigin, allowOrigin)
+			res.Header().Set(echo.HeaderAccessControlAllowMethods, allowMethods)
+			if config.AllowCredentials {
+				res.Header().Set(echo.HeaderAccessControlAllowCredentials, "true")
+			}
+			if allowHeaders != "" {
+				res.Header().Set(echo.HeaderAccessControlAllowHeaders, allowHeaders)
+			} else {
+				h := req.Header.Get(echo.HeaderAccessControlRequestHeaders)
+				if h != "" {
+					res.Header().Set(echo.HeaderAccessControlAllowHeaders, h)
+				}
+			}
+			if config.MaxAge > 0 {
+				res.Header().Set(echo.HeaderAccessControlMaxAge, maxAge)
+			}
+			return c.NoContent(http.StatusNoContent)
+		}
+	}
+}

vendor/github.com/labstack/echo/v4/middleware/csrf.go

@@ -0,0 +1,210 @@
+package middleware
+
+import (
+	"crypto/subtle"
+	"errors"
+	"net/http"
+	"strings"
+	"time"
+
+	"github.com/labstack/echo/v4"
+	"github.com/labstack/gommon/random"
+)
+
+type (
+	// CSRFConfig defines the config for CSRF middleware.
+	CSRFConfig struct {
+		// Skipper defines a function to skip middleware.
+		Skipper Skipper
+
+		// TokenLength is the length of the generated token.
+		TokenLength uint8 `yaml:"token_length"`
+		// Optional. Default value 32.
+
+		// TokenLookup is a string in the form of "<source>:<key>" that is used
+		// to extract token from the request.
+		// Optional. Default value "header:X-CSRF-Token".
+		// Possible values:
+		// - "header:<name>"
+		// - "form:<name>"
+		// - "query:<name>"
+		TokenLookup string `yaml:"token_lookup"`
+
+		// Context key to store generated CSRF token into context.
+		// Optional. Default value "csrf".
+		ContextKey string `yaml:"context_key"`
+
+		// Name of the CSRF cookie. This cookie will store CSRF token.
+		// Optional. Default value "csrf".
+		CookieName string `yaml:"cookie_name"`
+
+		// Domain of the CSRF cookie.
+		// Optional. Default value none.
+		CookieDomain string `yaml:"cookie_domain"`
+
+		// Path of the CSRF cookie.
+		// Optional. Default value none.
+		CookiePath string `yaml:"cookie_path"`
+
+		// Max age (in seconds) of the CSRF cookie.
+		// Optional. Default value 86400 (24hr).
+		CookieMaxAge int `yaml:"cookie_max_age"`
+
+		// Indicates if CSRF cookie is secure.
+		// Optional. Default value false.
+		CookieSecure bool `yaml:"cookie_secure"`
+
+		// Indicates if CSRF cookie is HTTP only.
+		// Optional. Default value false.
+		CookieHTTPOnly bool `yaml:"cookie_http_only"`
+	}
+
+	// csrfTokenExtractor defines a function that takes `echo.Context` and returns
+	// either a token or an error.
+	csrfTokenExtractor func(echo.Context) (string, error)
+)
+
+var (
+	// DefaultCSRFConfig is the default CSRF middleware config.
+	DefaultCSRFConfig = CSRFConfig{
+		Skipper:      DefaultSkipper,
+		TokenLength:  32,
+		TokenLookup:  "header:" + echo.HeaderXCSRFToken,
+		ContextKey:   "csrf",
+		CookieName:   "_csrf",
+		CookieMaxAge: 86400,
+	}
+)
+
+// CSRF returns a Cross-Site Request Forgery (CSRF) middleware.
+// See: https://en.wikipedia.org/wiki/Cross-site_request_forgery
+func CSRF() echo.MiddlewareFunc {
+	c := DefaultCSRFConfig
+	return CSRFWithConfig(c)
+}
+
+// CSRFWithConfig returns a CSRF middleware with config.
+// See `CSRF()`.
+func CSRFWithConfig(config CSRFConfig) echo.MiddlewareFunc {
+	// Defaults
+	if config.Skipper == nil {
+		config.Skipper = DefaultCSRFConfig.Skipper
+	}
+	if config.TokenLength == 0 {
+		config.TokenLength = DefaultCSRFConfig.TokenLength
+	}
+	if config.TokenLookup == "" {
+		config.TokenLookup = DefaultCSRFConfig.TokenLookup
+	}
+	if config.ContextKey == "" {
+		config.ContextKey = DefaultCSRFConfig.ContextKey
+	}
+	if config.CookieName == "" {
+		config.CookieName = DefaultCSRFConfig.CookieName
+	}
+	if config.CookieMaxAge == 0 {
+		config.CookieMaxAge = DefaultCSRFConfig.CookieMaxAge
+	}
+
+	// Initialize
+	parts := strings.Split(config.TokenLookup, ":")
+	extractor := csrfTokenFromHeader(parts[1])
+	switch parts[0] {
+	case "form":
+		extractor = csrfTokenFromForm(parts[1])
+	case "query":
+		extractor = csrfTokenFromQuery(parts[1])
+	}
+
+	return func(next echo.HandlerFunc) echo.HandlerFunc {
+		return func(c echo.Context) error {
+			if config.Skipper(c) {
+				return next(c)
+			}
+
+			req := c.Request()
+			k, err := c.Cookie(config.CookieName)
+			token := ""
+
+			// Generate token
+			if err != nil {
+				token = random.String(config.TokenLength)
+			} else {
+				// Reuse token
+				token = k.Value
+			}
+
+			switch req.Method {
+			case http.MethodGet, http.MethodHead, http.MethodOptions, http.MethodTrace:
+			default:
+				// Validate token only for requests which are not defined as 'safe' by RFC7231
+				clientToken, err := extractor(c)
+				if err != nil {
+					return echo.NewHTTPError(http.StatusBadRequest, err.Error())
+				}
+				if !validateCSRFToken(token, clientToken) {
+					return echo.NewHTTPError(http.StatusForbidden, "invalid csrf token")
+				}
+			}
+
+			// Set CSRF cookie
+			cookie := new(http.Cookie)
+			cookie.Name = config.CookieName
+			cookie.Value = token
+			if config.CookiePath != "" {
+				cookie.Path = config.CookiePath
+			}
+			if config.CookieDomain != "" {
+				cookie.Domain = config.CookieDomain
+			}
+			cookie.Expires = time.Now().Add(time.Duration(config.CookieMaxAge) * time.Second)
+			cookie.Secure = config.CookieSecure
+			cookie.HttpOnly = config.CookieHTTPOnly
+			c.SetCookie(cookie)
+
+			// Store token in the context
+			c.Set(config.ContextKey, token)
+
+			// Protect clients from caching the response
+			c.Response().Header().Add(echo.HeaderVary, echo.HeaderCookie)
+
+			return next(c)
+		}
+	}
+}
+
+// csrfTokenFromForm returns a `csrfTokenExtractor` that extracts token from the
+// provided request header.
+func csrfTokenFromHeader(header string) csrfTokenExtractor {
+	return func(c echo.Context) (string, error) {
+		return c.Request().Header.Get(header), nil
+	}
+}
+
+// csrfTokenFromForm returns a `csrfTokenExtractor` that extracts token from the
+// provided form parameter.
+func csrfTokenFromForm(param string) csrfTokenExtractor {
+	return func(c echo.Context) (string, error) {
+		token := c.FormValue(param)
+		if token == "" {
+			return "", errors.New("missing csrf token in the form parameter")
+		}
+		return token, nil
+	}
+}
+
+// csrfTokenFromQuery returns a `csrfTokenExtractor` that extracts token from the
+// provided query parameter.
+func csrfTokenFromQuery(param string) csrfTokenExtractor {
+	return func(c echo.Context) (string, error) {
+		token := c.QueryParam(param)
+		if token == "" {
+			return "", errors.New("missing csrf token in the query string")
+		}
+		return token, nil
+	}
+}
+
+func validateCSRFToken(token, clientToken string) bool {
+	return subtle.ConstantTimeCompare([]byte(token), []byte(clientToken)) == 1
+}

vendor/github.com/labstack/echo/v4/middleware/jwt.go

@@ -0,0 +1,267 @@
+package middleware
+
+import (
+	"fmt"
+	"net/http"
+	"reflect"
+	"strings"
+
+	"github.com/dgrijalva/jwt-go"
+	"github.com/labstack/echo/v4"
+)
+
+type (
+	// JWTConfig defines the config for JWT middleware.
+	JWTConfig struct {
+		// Skipper defines a function to skip middleware.
+		Skipper Skipper
+
+		// BeforeFunc defines a function which is executed just before the middleware.
+		BeforeFunc BeforeFunc
+
+		// SuccessHandler defines a function which is executed for a valid token.
+		SuccessHandler JWTSuccessHandler
+
+		// ErrorHandler defines a function which is executed for an invalid token.
+		// It may be used to define a custom JWT error.
+		ErrorHandler JWTErrorHandler
+
+		// ErrorHandlerWithContext is almost identical to ErrorHandler, but it's passed the current context.
+		ErrorHandlerWithContext JWTErrorHandlerWithContext
+
+		// Signing key to validate token. Used as fallback if SigningKeys has length 0.
+		// Required. This or SigningKeys.
+		SigningKey interface{}
+
+		// Map of signing keys to validate token with kid field usage.
+		// Required. This or SigningKey.
+		SigningKeys map[string]interface{}
+
+		// Signing method, used to check token signing method.
+		// Optional. Default value HS256.
+		SigningMethod string
+
+		// Context key to store user information from the token into context.
+		// Optional. Default value "user".
+		ContextKey string
+
+		// Claims are extendable claims data defining token content.
+		// Optional. Default value jwt.MapClaims
+		Claims jwt.Claims
+
+		// TokenLookup is a string in the form of "<source>:<name>" that is used
+		// to extract token from the request.
+		// Optional. Default value "header:Authorization".
+		// Possible values:
+		// - "header:<name>"
+		// - "query:<name>"
+		// - "param:<name>"
+		// - "cookie:<name>"
+		TokenLookup string
+
+		// AuthScheme to be used in the Authorization header.
+		// Optional. Default value "Bearer".
+		AuthScheme string
+
+		keyFunc jwt.Keyfunc
+	}
+
+	// JWTSuccessHandler defines a function which is executed for a valid token.
+	JWTSuccessHandler func(echo.Context)
+
+	// JWTErrorHandler defines a function which is executed for an invalid token.
+	JWTErrorHandler func(error) error
+
+	// JWTErrorHandlerWithContext is almost identical to JWTErrorHandler, but it's passed the current context.
+	JWTErrorHandlerWithContext func(error, echo.Context) error
+
+	jwtExtractor func(echo.Context) (string, error)
+)
+
+// Algorithms
+const (
+	AlgorithmHS256 = "HS256"
+)
+
+// Errors
+var (
+	ErrJWTMissing = echo.NewHTTPError(http.StatusBadRequest, "missing or malformed jwt")
+)
+
+var (
+	// DefaultJWTConfig is the default JWT auth middleware config.
+	DefaultJWTConfig = JWTConfig{
+		Skipper:       DefaultSkipper,
+		SigningMethod: AlgorithmHS256,
+		ContextKey:    "user",
+		TokenLookup:   "header:" + echo.HeaderAuthorization,
+		AuthScheme:    "Bearer",
+		Claims:        jwt.MapClaims{},
+	}
+)
+
+// JWT returns a JSON Web Token (JWT) auth middleware.
+//
+// For valid token, it sets the user in context and calls next handler.
+// For invalid token, it returns "401 - Unauthorized" error.
+// For missing token, it returns "400 - Bad Request" error.
+//
+// See: https://jwt.io/introduction
+// See `JWTConfig.TokenLookup`
+func JWT(key interface{}) echo.MiddlewareFunc {
+	c := DefaultJWTConfig
+	c.SigningKey = key
+	return JWTWithConfig(c)
+}
+
+// JWTWithConfig returns a JWT auth middleware with config.
+// See: `JWT()`.
+func JWTWithConfig(config JWTConfig) echo.MiddlewareFunc {
+	// Defaults
+	if config.Skipper == nil {
+		config.Skipper = DefaultJWTConfig.Skipper
+	}
+	if config.SigningKey == nil && len(config.SigningKeys) == 0 {
+		panic("echo: jwt middleware requires signing key")
+	}
+	if config.SigningMethod == "" {
+		config.SigningMethod = DefaultJWTConfig.SigningMethod
+	}
+	if config.ContextKey == "" {
+		config.ContextKey = DefaultJWTConfig.ContextKey
+	}
+	if config.Claims == nil {
+		config.Claims = DefaultJWTConfig.Claims
+	}
+	if config.TokenLookup == "" {
+		config.TokenLookup = DefaultJWTConfig.TokenLookup
+	}
+	if config.AuthScheme == "" {
+		config.AuthScheme = DefaultJWTConfig.AuthScheme
+	}
+	config.keyFunc = func(t *jwt.Token) (interface{}, error) {
+		// Check the signing method
+		if t.Method.Alg() != config.SigningMethod {
+			return nil, fmt.Errorf("unexpected jwt signing method=%v", t.Header["alg"])
+		}
+		if len(config.SigningKeys) > 0 {
+			if kid, ok := t.Header["kid"].(string); ok {
+				if key, ok := config.SigningKeys[kid]; ok {
+					return key, nil
+				}
+			}
+			return nil, fmt.Errorf("unexpected jwt key id=%v", t.Header["kid"])
+		}
+
+		return config.SigningKey, nil
+	}
+
+	// Initialize
+	parts := strings.Split(config.TokenLookup, ":")
+	extractor := jwtFromHeader(parts[1], config.AuthScheme)
+	switch parts[0] {
+	case "query":
+		extractor = jwtFromQuery(parts[1])
+	case "param":
+		extractor = jwtFromParam(parts[1])
+	case "cookie":
+		extractor = jwtFromCookie(parts[1])
+	}
+
+	return func(next echo.HandlerFunc) echo.HandlerFunc {
+		return func(c echo.Context) error {
+			if config.Skipper(c) {
+				return next(c)
+			}
+
+			if config.BeforeFunc != nil {
+				config.BeforeFunc(c)
+			}
+
+			auth, err := extractor(c)
+			if err != nil {
+				if config.ErrorHandler != nil {
+					return config.ErrorHandler(err)
+				}
+
+				if config.ErrorHandlerWithContext != nil {
+					return config.ErrorHandlerWithContext(err, c)
+				}
+				return err
+			}
+			token := new(jwt.Token)
+			// Issue #647, #656
+			if _, ok := config.Claims.(jwt.MapClaims); ok {
+				token, err = jwt.Parse(auth, config.keyFunc)
+			} else {
+				t := reflect.ValueOf(config.Claims).Type().Elem()
+				claims := reflect.New(t).Interface().(jwt.Claims)
+				token, err = jwt.ParseWithClaims(auth, claims, config.keyFunc)
+			}
+			if err == nil && token.Valid {
+				// Store user information from token into context.
+				c.Set(config.ContextKey, token)
+				if config.SuccessHandler != nil {
+					config.SuccessHandler(c)
+				}
+				return next(c)
+			}
+			if config.ErrorHandler != nil {
+				return config.ErrorHandler(err)
+			}
+			if config.ErrorHandlerWithContext != nil {
+				return config.ErrorHandlerWithContext(err, c)
+			}
+			return &echo.HTTPError{
+				Code:     http.StatusUnauthorized,
+				Message:  "invalid or expired jwt",
+				Internal: err,
+			}
+		}
+	}
+}
+
+// jwtFromHeader returns a `jwtExtractor` that extracts token from the request header.
+func jwtFromHeader(header string, authScheme string) jwtExtractor {
+	return func(c echo.Context) (string, error) {
+		auth := c.Request().Header.Get(header)
+		l := len(authScheme)
+		if len(auth) > l+1 && auth[:l] == authScheme {
+			return auth[l+1:], nil
+		}
+		return "", ErrJWTMissing
+	}
+}
+
+// jwtFromQuery returns a `jwtExtractor` that extracts token from the query string.
+func jwtFromQuery(param string) jwtExtractor {
+	return func(c echo.Context) (string, error) {
+		token := c.QueryParam(param)
+		if token == "" {
+			return "", ErrJWTMissing
+		}
+		return token, nil
+	}
+}
+
+// jwtFromParam returns a `jwtExtractor` that extracts token from the url param string.
+func jwtFromParam(param string) jwtExtractor {
+	return func(c echo.Context) (string, error) {
+		token := c.Param(param)
+		if token == "" {
+			return "", ErrJWTMissing
+		}
+		return token, nil
+	}
+}
+
+// jwtFromCookie returns a `jwtExtractor` that extracts token from the named cookie.
+func jwtFromCookie(name string) jwtExtractor {
+	return func(c echo.Context) (string, error) {
+		cookie, err := c.Cookie(name)
+		if err != nil {
+			return "", ErrJWTMissing
+		}
+		return cookie.Value, nil
+	}
+}

vendor/github.com/labstack/echo/v4/middleware/key_auth.go

@@ -0,0 +1,153 @@
+package middleware
+
+import (
+	"errors"
+	"net/http"
+	"strings"
+
+	"github.com/labstack/echo/v4"
+)
+
+type (
+	// KeyAuthConfig defines the config for KeyAuth middleware.
+	KeyAuthConfig struct {
+		// Skipper defines a function to skip middleware.
+		Skipper Skipper
+
+		// KeyLookup is a string in the form of "<source>:<name>" that is used
+		// to extract key from the request.
+		// Optional. Default value "header:Authorization".
+		// Possible values:
+		// - "header:<name>"
+		// - "query:<name>"
+		// - "form:<name>"
+		KeyLookup string `yaml:"key_lookup"`
+
+		// AuthScheme to be used in the Authorization header.
+		// Optional. Default value "Bearer".
+		AuthScheme string
+
+		// Validator is a function to validate key.
+		// Required.
+		Validator KeyAuthValidator
+	}
+
+	// KeyAuthValidator defines a function to validate KeyAuth credentials.
+	KeyAuthValidator func(string, echo.Context) (bool, error)
+
+	keyExtractor func(echo.Context) (string, error)
+)
+
+var (
+	// DefaultKeyAuthConfig is the default KeyAuth middleware config.
+	DefaultKeyAuthConfig = KeyAuthConfig{
+		Skipper:    DefaultSkipper,
+		KeyLookup:  "header:" + echo.HeaderAuthorization,
+		AuthScheme: "Bearer",
+	}
+)
+
+// KeyAuth returns an KeyAuth middleware.
+//
+// For valid key it calls the next handler.
+// For invalid key, it sends "401 - Unauthorized" response.
+// For missing key, it sends "400 - Bad Request" response.
+func KeyAuth(fn KeyAuthValidator) echo.MiddlewareFunc {
+	c := DefaultKeyAuthConfig
+	c.Validator = fn
+	return KeyAuthWithConfig(c)
+}
+
+// KeyAuthWithConfig returns an KeyAuth middleware with config.
+// See `KeyAuth()`.
+func KeyAuthWithConfig(config KeyAuthConfig) echo.MiddlewareFunc {
+	// Defaults
+	if config.Skipper == nil {
+		config.Skipper = DefaultKeyAuthConfig.Skipper
+	}
+	// Defaults
+	if config.AuthScheme == "" {
+		config.AuthScheme = DefaultKeyAuthConfig.AuthScheme
+	}
+	if config.KeyLookup == "" {
+		config.KeyLookup = DefaultKeyAuthConfig.KeyLookup
+	}
+	if config.Validator == nil {
+		panic("echo: key-auth middleware requires a validator function")
+	}
+
+	// Initialize
+	parts := strings.Split(config.KeyLookup, ":")
+	extractor := keyFromHeader(parts[1], config.AuthScheme)
+	switch parts[0] {
+	case "query":
+		extractor = keyFromQuery(parts[1])
+	case "form":
+		extractor = keyFromForm(parts[1])
+	}
+
+	return func(next echo.HandlerFunc) echo.HandlerFunc {
+		return func(c echo.Context) error {
+			if config.Skipper(c) {
+				return next(c)
+			}
+
+			// Extract and verify key
+			key, err := extractor(c)
+			if err != nil {
+				return echo.NewHTTPError(http.StatusBadRequest, err.Error())
+			}
+			valid, err := config.Validator(key, c)
+			if err != nil {
+				return &echo.HTTPError{
+					Code:     http.StatusUnauthorized,
+					Message:  "invalid key",
+					Internal: err,
+				}
+			} else if valid {
+				return next(c)
+			}
+			return echo.ErrUnauthorized
+		}
+	}
+}
+
+// keyFromHeader returns a `keyExtractor` that extracts key from the request header.
+func keyFromHeader(header string, authScheme string) keyExtractor {
+	return func(c echo.Context) (string, error) {
+		auth := c.Request().Header.Get(header)
+		if auth == "" {
+			return "", errors.New("missing key in request header")
+		}
+		if header == echo.HeaderAuthorization {
+			l := len(authScheme)
+			if len(auth) > l+1 && auth[:l] == authScheme {
+				return auth[l+1:], nil
+			}
+			return "", errors.New("invalid key in the request header")
+		}
+		return auth, nil
+	}
+}
+
+// keyFromQuery returns a `keyExtractor` that extracts key from the query string.
+func keyFromQuery(param string) keyExtractor {
+	return func(c echo.Context) (string, error) {
+		key := c.QueryParam(param)
+		if key == "" {
+			return "", errors.New("missing key in the query string")
+		}
+		return key, nil
+	}
+}
+
+// keyFromForm returns a `keyExtractor` that extracts key from the form.
+func keyFromForm(param string) keyExtractor {
+	return func(c echo.Context) (string, error) {
+		key := c.FormValue(param)
+		if key == "" {
+			return "", errors.New("missing key in the form")
+		}
+		return key, nil
+	}
+}

vendor/github.com/labstack/echo/v4/middleware/logger.go

@@ -0,0 +1,223 @@
+package middleware
+
+import (
+	"bytes"
+	"encoding/json"
+	"io"
+	"strconv"
+	"strings"
+	"sync"
+	"time"
+
+	"github.com/labstack/echo/v4"
+	"github.com/labstack/gommon/color"
+	"github.com/valyala/fasttemplate"
+)
+
+type (
+	// LoggerConfig defines the config for Logger middleware.
+	LoggerConfig struct {
+		// Skipper defines a function to skip middleware.
+		Skipper Skipper
+
+		// Tags to construct the logger format.
+		//
+		// - time_unix
+		// - time_unix_nano
+		// - time_rfc3339
+		// - time_rfc3339_nano
+		// - time_custom
+		// - id (Request ID)
+		// - remote_ip
+		// - uri
+		// - host
+		// - method
+		// - path
+		// - protocol
+		// - referer
+		// - user_agent
+		// - status
+		// - error
+		// - latency (In nanoseconds)
+		// - latency_human (Human readable)
+		// - bytes_in (Bytes received)
+		// - bytes_out (Bytes sent)
+		// - header:<NAME>
+		// - query:<NAME>
+		// - form:<NAME>
+		//
+		// Example "${remote_ip} ${status}"
+		//
+		// Optional. Default value DefaultLoggerConfig.Format.
+		Format string `yaml:"format"`
+
+		// Optional. Default value DefaultLoggerConfig.CustomTimeFormat.
+		CustomTimeFormat string `yaml:"custom_time_format"`
+
+		// Output is a writer where logs in JSON format are written.
+		// Optional. Default value os.Stdout.
+		Output io.Writer
+
+		template *fasttemplate.Template
+		colorer  *color.Color
+		pool     *sync.Pool
+	}
+)
+
+var (
+	// DefaultLoggerConfig is the default Logger middleware config.
+	DefaultLoggerConfig = LoggerConfig{
+		Skipper: DefaultSkipper,
+		Format: `{"time":"${time_rfc3339_nano}","id":"${id}","remote_ip":"${remote_ip}",` +
+			`"host":"${host}","method":"${method}","uri":"${uri}","user_agent":"${user_agent}",` +
+			`"status":${status},"error":"${error}","latency":${latency},"latency_human":"${latency_human}"` +
+			`,"bytes_in":${bytes_in},"bytes_out":${bytes_out}}` + "\n",
+		CustomTimeFormat: "2006-01-02 15:04:05.00000",
+		colorer:          color.New(),
+	}
+)
+
+// Logger returns a middleware that logs HTTP requests.
+func Logger() echo.MiddlewareFunc {
+	return LoggerWithConfig(DefaultLoggerConfig)
+}
+
+// LoggerWithConfig returns a Logger middleware with config.
+// See: `Logger()`.
+func LoggerWithConfig(config LoggerConfig) echo.MiddlewareFunc {
+	// Defaults
+	if config.Skipper == nil {
+		config.Skipper = DefaultLoggerConfig.Skipper
+	}
+	if config.Format == "" {
+		config.Format = DefaultLoggerConfig.Format
+	}
+	if config.Output == nil {
+		config.Output = DefaultLoggerConfig.Output
+	}
+
+	config.template = fasttemplate.New(config.Format, "${", "}")
+	config.colorer = color.New()
+	config.colorer.SetOutput(config.Output)
+	config.pool = &sync.Pool{
+		New: func() interface{} {
+			return bytes.NewBuffer(make([]byte, 256))
+		},
+	}
+
+	return func(next echo.HandlerFunc) echo.HandlerFunc {
+		return func(c echo.Context) (err error) {
+			if config.Skipper(c) {
+				return next(c)
+			}
+
+			req := c.Request()
+			res := c.Response()
+			start := time.Now()
+			if err = next(c); err != nil {
+				c.Error(err)
+			}
+			stop := time.Now()
+			buf := config.pool.Get().(*bytes.Buffer)
+			buf.Reset()
+			defer config.pool.Put(buf)
+
+			if _, err = config.template.ExecuteFunc(buf, func(w io.Writer, tag string) (int, error) {
+				switch tag {
+				case "time_unix":
+					return buf.WriteString(strconv.FormatInt(time.Now().Unix(), 10))
+				case "time_unix_nano":
+					return buf.WriteString(strconv.FormatInt(time.Now().UnixNano(), 10))
+				case "time_rfc3339":
+					return buf.WriteString(time.Now().Format(time.RFC3339))
+				case "time_rfc3339_nano":
+					return buf.WriteString(time.Now().Format(time.RFC3339Nano))
+				case "time_custom":
+					return buf.WriteString(time.Now().Format(config.CustomTimeFormat))
+				case "id":
+					id := req.Header.Get(echo.HeaderXRequestID)
+					if id == "" {
+						id = res.Header().Get(echo.HeaderXRequestID)
+					}
+					return buf.WriteString(id)
+				case "remote_ip":
+					return buf.WriteString(c.RealIP())
+				case "host":
+					return buf.WriteString(req.Host)
+				case "uri":
+					return buf.WriteString(req.RequestURI)
+				case "method":
+					return buf.WriteString(req.Method)
+				case "path":
+					p := req.URL.Path
+					if p == "" {
+						p = "/"
+					}
+					return buf.WriteString(p)
+				case "protocol":
+					return buf.WriteString(req.Proto)
+				case "referer":
+					return buf.WriteString(req.Referer())
+				case "user_agent":
+					return buf.WriteString(req.UserAgent())
+				case "status":
+					n := res.Status
+					s := config.colorer.Green(n)
+					switch {
+					case n >= 500:
+						s = config.colorer.Red(n)
+					case n >= 400:
+						s = config.colorer.Yellow(n)
+					case n >= 300:
+						s = config.colorer.Cyan(n)
+					}
+					return buf.WriteString(s)
+				case "error":
+					if err != nil {
+						// Error may contain invalid JSON e.g. `"`
+						b, _ := json.Marshal(err.Error())
+						b = b[1 : len(b)-1]
+						return buf.Write(b)
+					}
+				case "latency":
+					l := stop.Sub(start)
+					return buf.WriteString(strconv.FormatInt(int64(l), 10))
+				case "latency_human":
+					return buf.WriteString(stop.Sub(start).String())
+				case "bytes_in":
+					cl := req.Header.Get(echo.HeaderContentLength)
+					if cl == "" {
+						cl = "0"
+					}
+					return buf.WriteString(cl)
+				case "bytes_out":
+					return buf.WriteString(strconv.FormatInt(res.Size, 10))
+				default:
+					switch {
+					case strings.HasPrefix(tag, "header:"):
+						return buf.Write([]byte(c.Request().Header.Get(tag[7:])))
+					case strings.HasPrefix(tag, "query:"):
+						return buf.Write([]byte(c.QueryParam(tag[6:])))
+					case strings.HasPrefix(tag, "form:"):
+						return buf.Write([]byte(c.FormValue(tag[5:])))
+					case strings.HasPrefix(tag, "cookie:"):
+						cookie, err := c.Cookie(tag[7:])
+						if err == nil {
+							return buf.Write([]byte(cookie.Value))
+						}
+					}
+				}
+				return 0, nil
+			}); err != nil {
+				return
+			}
+
+			if config.Output == nil {
+				_, err = c.Logger().Output().Write(buf.Bytes())
+				return
+			}
+			_, err = config.Output.Write(buf.Bytes())
+			return
+		}
+	}
+}

vendor/github.com/labstack/echo/v4/middleware/method_override.go

@@ -0,0 +1,92 @@
+package middleware
+
+import (
+	"net/http"
+
+	"github.com/labstack/echo/v4"
+)
+
+type (
+	// MethodOverrideConfig defines the config for MethodOverride middleware.
+	MethodOverrideConfig struct {
+		// Skipper defines a function to skip middleware.
+		Skipper Skipper
+
+		// Getter is a function that gets overridden method from the request.
+		// Optional. Default values MethodFromHeader(echo.HeaderXHTTPMethodOverride).
+		Getter MethodOverrideGetter
+	}
+
+	// MethodOverrideGetter is a function that gets overridden method from the request
+	MethodOverrideGetter func(echo.Context) string
+)
+
+var (
+	// DefaultMethodOverrideConfig is the default MethodOverride middleware config.
+	DefaultMethodOverrideConfig = MethodOverrideConfig{
+		Skipper: DefaultSkipper,
+		Getter:  MethodFromHeader(echo.HeaderXHTTPMethodOverride),
+	}
+)
+
+// MethodOverride returns a MethodOverride middleware.
+// MethodOverride  middleware checks for the overridden method from the request and
+// uses it instead of the original method.
+//
+// For security reasons, only `POST` method can be overridden.
+func MethodOverride() echo.MiddlewareFunc {
+	return MethodOverrideWithConfig(DefaultMethodOverrideConfig)
+}
+
+// MethodOverrideWithConfig returns a MethodOverride middleware with config.
+// See: `MethodOverride()`.
+func MethodOverrideWithConfig(config MethodOverrideConfig) echo.MiddlewareFunc {
+	// Defaults
+	if config.Skipper == nil {
+		config.Skipper = DefaultMethodOverrideConfig.Skipper
+	}
+	if config.Getter == nil {
+		config.Getter = DefaultMethodOverrideConfig.Getter
+	}
+
+	return func(next echo.HandlerFunc) echo.HandlerFunc {
+		return func(c echo.Context) error {
+			if config.Skipper(c) {
+				return next(c)
+			}
+
+			req := c.Request()
+			if req.Method == http.MethodPost {
+				m := config.Getter(c)
+				if m != "" {
+					req.Method = m
+				}
+			}
+			return next(c)
+		}
+	}
+}
+
+// MethodFromHeader is a `MethodOverrideGetter` that gets overridden method from
+// the request header.
+func MethodFromHeader(header string) MethodOverrideGetter {
+	return func(c echo.Context) string {
+		return c.Request().Header.Get(header)
+	}
+}
+
+// MethodFromForm is a `MethodOverrideGetter` that gets overridden method from the
+// form parameter.
+func MethodFromForm(param string) MethodOverrideGetter {
+	return func(c echo.Context) string {
+		return c.FormValue(param)
+	}
+}
+
+// MethodFromQuery is a `MethodOverrideGetter` that gets overridden method from
+// the query parameter.
+func MethodFromQuery(param string) MethodOverrideGetter {
+	return func(c echo.Context) string {
+		return c.QueryParam(param)
+	}
+}

vendor/github.com/labstack/echo/v4/middleware/middleware.go

@@ -0,0 +1,38 @@
+package middleware
+
+import (
+	"regexp"
+	"strconv"
+	"strings"
+
+	"github.com/labstack/echo/v4"
+)
+
+type (
+	// Skipper defines a function to skip middleware. Returning true skips processing
+	// the middleware.
+	Skipper func(echo.Context) bool
+
+	// BeforeFunc defines a function which is executed just before the middleware.
+	BeforeFunc func(echo.Context)
+)
+
+func captureTokens(pattern *regexp.Regexp, input string) *strings.Replacer {
+	groups := pattern.FindAllStringSubmatch(input, -1)
+	if groups == nil {
+		return nil
+	}
+	values := groups[0][1:]
+	replace := make([]string, 2*len(values))
+	for i, v := range values {
+		j := 2 * i
+		replace[j] = "$" + strconv.Itoa(i+1)
+		replace[j+1] = v
+	}
+	return strings.NewReplacer(replace...)
+}
+
+// DefaultSkipper returns false which processes the middleware.
+func DefaultSkipper(echo.Context) bool {
+	return false
+}

vendor/github.com/labstack/echo/v4/middleware/proxy.go

@@ -0,0 +1,261 @@
+package middleware
+
+import (
+	"fmt"
+	"io"
+	"math/rand"
+	"net"
+	"net/http"
+	"net/url"
+	"regexp"
+	"strings"
+	"sync"
+	"sync/atomic"
+	"time"
+
+	"github.com/labstack/echo/v4"
+)
+
+// TODO: Handle TLS proxy
+
+type (
+	// ProxyConfig defines the config for Proxy middleware.
+	ProxyConfig struct {
+		// Skipper defines a function to skip middleware.
+		Skipper Skipper
+
+		// Balancer defines a load balancing technique.
+		// Required.
+		Balancer ProxyBalancer
+
+		// Rewrite defines URL path rewrite rules. The values captured in asterisk can be
+		// retrieved by index e.g. $1, $2 and so on.
+		// Examples:
+		// "/old":              "/new",
+		// "/api/*":            "/$1",
+		// "/js/*":             "/public/javascripts/$1",
+		// "/users/*/orders/*": "/user/$1/order/$2",
+		Rewrite map[string]string
+
+		// Context key to store selected ProxyTarget into context.
+		// Optional. Default value "target".
+		ContextKey string
+
+		// To customize the transport to remote.
+		// Examples: If custom TLS certificates are required.
+		Transport http.RoundTripper
+
+		rewriteRegex map[*regexp.Regexp]string
+	}
+
+	// ProxyTarget defines the upstream target.
+	ProxyTarget struct {
+		Name string
+		URL  *url.URL
+		Meta echo.Map
+	}
+
+	// ProxyBalancer defines an interface to implement a load balancing technique.
+	ProxyBalancer interface {
+		AddTarget(*ProxyTarget) bool
+		RemoveTarget(string) bool
+		Next(echo.Context) *ProxyTarget
+	}
+
+	commonBalancer struct {
+		targets []*ProxyTarget
+		mutex   sync.RWMutex
+	}
+
+	// RandomBalancer implements a random load balancing technique.
+	randomBalancer struct {
+		*commonBalancer
+		random *rand.Rand
+	}
+
+	// RoundRobinBalancer implements a round-robin load balancing technique.
+	roundRobinBalancer struct {
+		*commonBalancer
+		i uint32
+	}
+)
+
+var (
+	// DefaultProxyConfig is the default Proxy middleware config.
+	DefaultProxyConfig = ProxyConfig{
+		Skipper:    DefaultSkipper,
+		ContextKey: "target",
+	}
+)
+
+func proxyRaw(t *ProxyTarget, c echo.Context) http.Handler {
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		in, _, err := c.Response().Hijack()
+		if err != nil {
+			c.Set("_error", fmt.Sprintf("proxy raw, hijack error=%v, url=%s", t.URL, err))
+			return
+		}
+		defer in.Close()
+
+		out, err := net.Dial("tcp", t.URL.Host)
+		if err != nil {
+			c.Set("_error", echo.NewHTTPError(http.StatusBadGateway, fmt.Sprintf("proxy raw, dial error=%v, url=%s", t.URL, err)))
+			return
+		}
+		defer out.Close()
+
+		// Write header
+		err = r.Write(out)
+		if err != nil {
+			c.Set("_error", echo.NewHTTPError(http.StatusBadGateway, fmt.Sprintf("proxy raw, request header copy error=%v, url=%s", t.URL, err)))
+			return
+		}
+
+		errCh := make(chan error, 2)
+		cp := func(dst io.Writer, src io.Reader) {
+			_, err = io.Copy(dst, src)
+			errCh <- err
+		}
+
+		go cp(out, in)
+		go cp(in, out)
+		err = <-errCh
+		if err != nil && err != io.EOF {
+			c.Set("_error", fmt.Errorf("proxy raw, copy body error=%v, url=%s", t.URL, err))
+		}
+	})
+}
+
+// NewRandomBalancer returns a random proxy balancer.
+func NewRandomBalancer(targets []*ProxyTarget) ProxyBalancer {
+	b := &randomBalancer{commonBalancer: new(commonBalancer)}
+	b.targets = targets
+	return b
+}
+
+// NewRoundRobinBalancer returns a round-robin proxy balancer.
+func NewRoundRobinBalancer(targets []*ProxyTarget) ProxyBalancer {
+	b := &roundRobinBalancer{commonBalancer: new(commonBalancer)}
+	b.targets = targets
+	return b
+}
+
+// AddTarget adds an upstream target to the list.
+func (b *commonBalancer) AddTarget(target *ProxyTarget) bool {
+	for _, t := range b.targets {
+		if t.Name == target.Name {
+			return false
+		}
+	}
+	b.mutex.Lock()
+	defer b.mutex.Unlock()
+	b.targets = append(b.targets, target)
+	return true
+}
+
+// RemoveTarget removes an upstream target from the list.
+func (b *commonBalancer) RemoveTarget(name string) bool {
+	b.mutex.Lock()
+	defer b.mutex.Unlock()
+	for i, t := range b.targets {
+		if t.Name == name {
+			b.targets = append(b.targets[:i], b.targets[i+1:]...)
+			return true
+		}
+	}
+	return false
+}
+
+// Next randomly returns an upstream target.
+func (b *randomBalancer) Next(c echo.Context) *ProxyTarget {
+	if b.random == nil {
+		b.random = rand.New(rand.NewSource(int64(time.Now().Nanosecond())))
+	}
+	b.mutex.RLock()
+	defer b.mutex.RUnlock()
+	return b.targets[b.random.Intn(len(b.targets))]
+}
+
+// Next returns an upstream target using round-robin technique.
+func (b *roundRobinBalancer) Next(c echo.Context) *ProxyTarget {
+	b.i = b.i % uint32(len(b.targets))
+	t := b.targets[b.i]
+	atomic.AddUint32(&b.i, 1)
+	return t
+}
+
+// Proxy returns a Proxy middleware.
+//
+// Proxy middleware forwards the request to upstream server using a configured load balancing technique.
+func Proxy(balancer ProxyBalancer) echo.MiddlewareFunc {
+	c := DefaultProxyConfig
+	c.Balancer = balancer
+	return ProxyWithConfig(c)
+}
+
+// ProxyWithConfig returns a Proxy middleware with config.
+// See: `Proxy()`
+func ProxyWithConfig(config ProxyConfig) echo.MiddlewareFunc {
+	// Defaults
+	if config.Skipper == nil {
+		config.Skipper = DefaultProxyConfig.Skipper
+	}
+	if config.Balancer == nil {
+		panic("echo: proxy middleware requires balancer")
+	}
+	config.rewriteRegex = map[*regexp.Regexp]string{}
+
+	// Initialize
+	for k, v := range config.Rewrite {
+		k = strings.Replace(k, "*", "(\\S*)", -1)
+		config.rewriteRegex[regexp.MustCompile(k)] = v
+	}
+
+	return func(next echo.HandlerFunc) echo.HandlerFunc {
+		return func(c echo.Context) (err error) {
+			if config.Skipper(c) {
+				return next(c)
+			}
+
+			req := c.Request()
+			res := c.Response()
+			tgt := config.Balancer.Next(c)
+			c.Set(config.ContextKey, tgt)
+
+			// Rewrite
+			for k, v := range config.rewriteRegex {
+				replacer := captureTokens(k, req.URL.Path)
+				if replacer != nil {
+					req.URL.Path = replacer.Replace(v)
+				}
+			}
+
+			// Fix header
+			// Basically it's not good practice to unconditionally pass incoming x-real-ip header to upstream.
+			// However, for backward compatibility, legacy behavior is preserved unless you configure Echo#IPExtractor.
+			if req.Header.Get(echo.HeaderXRealIP) == "" || c.Echo().IPExtractor != nil {
+				req.Header.Set(echo.HeaderXRealIP, c.RealIP())
+			}
+			if req.Header.Get(echo.HeaderXForwardedProto) == "" {
+				req.Header.Set(echo.HeaderXForwardedProto, c.Scheme())
+			}
+			if c.IsWebSocket() && req.Header.Get(echo.HeaderXForwardedFor) == "" { // For HTTP, it is automatically set by Go HTTP reverse proxy.
+				req.Header.Set(echo.HeaderXForwardedFor, c.RealIP())
+			}
+
+			// Proxy
+			switch {
+			case c.IsWebSocket():
+				proxyRaw(tgt, c).ServeHTTP(res, req)
+			case req.Header.Get(echo.HeaderAccept) == "text/event-stream":
+			default:
+				proxyHTTP(tgt, c, config).ServeHTTP(res, req)
+			}
+			if e, ok := c.Get("_error").(error); ok {
+				err = e
+			}
+
+			return
+		}
+	}
+}

vendor/github.com/labstack/echo/v4/middleware/proxy_1_11.go

@@ -0,0 +1,24 @@
+// +build go1.11
+
+package middleware
+
+import (
+	"fmt"
+	"net/http"
+	"net/http/httputil"
+
+	"github.com/labstack/echo/v4"
+)
+
+func proxyHTTP(tgt *ProxyTarget, c echo.Context, config ProxyConfig) http.Handler {
+	proxy := httputil.NewSingleHostReverseProxy(tgt.URL)
+	proxy.ErrorHandler = func(resp http.ResponseWriter, req *http.Request, err error) {
+		desc := tgt.URL.String()
+		if tgt.Name != "" {
+			desc = fmt.Sprintf("%s(%s)", tgt.Name, tgt.URL.String())
+		}
+		c.Set("_error", echo.NewHTTPError(http.StatusBadGateway, fmt.Sprintf("remote %s unreachable, could not forward: %v", desc, err)))
+	}
+	proxy.Transport = config.Transport
+	return proxy
+}

vendor/github.com/labstack/echo/v4/middleware/proxy_1_11_n.go

@@ -0,0 +1,14 @@
+// +build !go1.11
+
+package middleware
+
+import (
+	"net/http"
+	"net/http/httputil"
+
+	"github.com/labstack/echo/v4"
+)
+
+func proxyHTTP(t *ProxyTarget, c echo.Context, config ProxyConfig) http.Handler {
+	return httputil.NewSingleHostReverseProxy(t.URL)
+}

vendor/github.com/labstack/echo/v4/middleware/recover.go

@@ -0,0 +1,81 @@
+package middleware
+
+import (
+	"fmt"
+	"runtime"
+
+	"github.com/labstack/echo/v4"
+)
+
+type (
+	// RecoverConfig defines the config for Recover middleware.
+	RecoverConfig struct {
+		// Skipper defines a function to skip middleware.
+		Skipper Skipper
+
+		// Size of the stack to be printed.
+		// Optional. Default value 4KB.
+		StackSize int `yaml:"stack_size"`
+
+		// DisableStackAll disables formatting stack traces of all other goroutines
+		// into buffer after the trace for the current goroutine.
+		// Optional. Default value false.
+		DisableStackAll bool `yaml:"disable_stack_all"`
+
+		// DisablePrintStack disables printing stack trace.
+		// Optional. Default value as false.
+		DisablePrintStack bool `yaml:"disable_print_stack"`
+	}
+)
+
+var (
+	// DefaultRecoverConfig is the default Recover middleware config.
+	DefaultRecoverConfig = RecoverConfig{
+		Skipper:           DefaultSkipper,
+		StackSize:         4 << 10, // 4 KB
+		DisableStackAll:   false,
+		DisablePrintStack: false,
+	}
+)
+
+// Recover returns a middleware which recovers from panics anywhere in the chain
+// and handles the control to the centralized HTTPErrorHandler.
+func Recover() echo.MiddlewareFunc {
+	return RecoverWithConfig(DefaultRecoverConfig)
+}
+
+// RecoverWithConfig returns a Recover middleware with config.
+// See: `Recover()`.
+func RecoverWithConfig(config RecoverConfig) echo.MiddlewareFunc {
+	// Defaults
+	if config.Skipper == nil {
+		config.Skipper = DefaultRecoverConfig.Skipper
+	}
+	if config.StackSize == 0 {
+		config.StackSize = DefaultRecoverConfig.StackSize
+	}
+
+	return func(next echo.HandlerFunc) echo.HandlerFunc {
+		return func(c echo.Context) error {
+			if config.Skipper(c) {
+				return next(c)
+			}
+
+			defer func() {
+				if r := recover(); r != nil {
+					err, ok := r.(error)
+					if !ok {
+						err = fmt.Errorf("%v", r)
+					}
+					stack := make([]byte, config.StackSize)
+					length := runtime.Stack(stack, !config.DisableStackAll)
+					if !config.DisablePrintStack {
+						c.Logger().Printf("[PANIC RECOVER] %v %s\n", err, stack[:length])
+					}
+					c.Error(err)
+				}
+			}()
+			return next(c)
+		}
+	}
+}

vendor/github.com/labstack/echo/v4/middleware/redirect.go

@@ -0,0 +1,153 @@
+package middleware
+
+import (
+	"net/http"
+
+	"github.com/labstack/echo/v4"
+)
+
+// RedirectConfig defines the config for Redirect middleware.
+type RedirectConfig struct {
+	// Skipper defines a function to skip middleware.
+	Skipper
+
+	// Status code to be used when redirecting the request.
+	// Optional. Default value http.StatusMovedPermanently.
+	Code int `yaml:"code"`
+}
+
+// redirectLogic represents a function that given a scheme, host and uri
+// can both: 1) determine if redirect is needed (will set ok accordingly) and
+// 2) return the appropriate redirect url.
+type redirectLogic func(scheme, host, uri string) (ok bool, url string)
+
+const www = "www."
+
+// DefaultRedirectConfig is the default Redirect middleware config.
+var DefaultRedirectConfig = RedirectConfig{
+	Skipper: DefaultSkipper,
+	Code:    http.StatusMovedPermanently,
+}
+
+// HTTPSRedirect redirects http requests to https.
+// For example, http://labstack.com will be redirect to https://labstack.com.
+//
+// Usage `Echo#Pre(HTTPSRedirect())`
+func HTTPSRedirect() echo.MiddlewareFunc {
+	return HTTPSRedirectWithConfig(DefaultRedirectConfig)
+}
+
+// HTTPSRedirectWithConfig returns an HTTPSRedirect middleware with config.
+// See `HTTPSRedirect()`.
+func HTTPSRedirectWithConfig(config RedirectConfig) echo.MiddlewareFunc {
+	return redirect(config, func(scheme, host, uri string) (ok bool, url string) {
+		if ok = scheme != "https"; ok {
+			url = "https://" + host + uri
+		}
+		return
+	})
+}
+
+// HTTPSWWWRedirect redirects http requests to https www.
+// For example, http://labstack.com will be redirect to https://www.labstack.com.
+//
+// Usage `Echo#Pre(HTTPSWWWRedirect())`
+func HTTPSWWWRedirect() echo.MiddlewareFunc {
+	return HTTPSWWWRedirectWithConfig(DefaultRedirectConfig)
+}
+
+// HTTPSWWWRedirectWithConfig returns an HTTPSRedirect middleware with config.
+// See `HTTPSWWWRedirect()`.
+func HTTPSWWWRedirectWithConfig(config RedirectConfig) echo.MiddlewareFunc {
+	return redirect(config, func(scheme, host, uri string) (ok bool, url string) {
+		if ok = scheme != "https" && host[:4] != www; ok {
+			url = "https://www." + host + uri
+		}
+		return
+	})
+}
+
+// HTTPSNonWWWRedirect redirects http requests to https non www.
+// For example, http://www.labstack.com will be redirect to https://labstack.com.
+//
+// Usage `Echo#Pre(HTTPSNonWWWRedirect())`
+func HTTPSNonWWWRedirect() echo.MiddlewareFunc {
+	return HTTPSNonWWWRedirectWithConfig(DefaultRedirectConfig)
+}
+
+// HTTPSNonWWWRedirectWithConfig returns an HTTPSRedirect middleware with config.
+// See `HTTPSNonWWWRedirect()`.
+func HTTPSNonWWWRedirectWithConfig(config RedirectConfig) echo.MiddlewareFunc {
+	return redirect(config, func(scheme, host, uri string) (ok bool, url string) {
+		if ok = scheme != "https"; ok {
+			if host[:4] == www {
+				host = host[4:]
+			}
+			url = "https://" + host + uri
+		}
+		return
+	})
+}
+
+// WWWRedirect redirects non www requests to www.
+// For example, http://labstack.com will be redirect to http://www.labstack.com.
+//
+// Usage `Echo#Pre(WWWRedirect())`
+func WWWRedirect() echo.MiddlewareFunc {
+	return WWWRedirectWithConfig(DefaultRedirectConfig)
+}
+
+// WWWRedirectWithConfig returns an HTTPSRedirect middleware with config.
+// See `WWWRedirect()`.
+func WWWRedirectWithConfig(config RedirectConfig) echo.MiddlewareFunc {
+	return redirect(config, func(scheme, host, uri string) (ok bool, url string) {
+		if ok = host[:4] != www; ok {
+			url = scheme + "://www." + host + uri
+		}
+		return
+	})
+}
+
+// NonWWWRedirect redirects www requests to non www.
+// For example, http://www.labstack.com will be redirect to http://labstack.com.
+//
+// Usage `Echo#Pre(NonWWWRedirect())`
+func NonWWWRedirect() echo.MiddlewareFunc {
+	return NonWWWRedirectWithConfig(DefaultRedirectConfig)
+}
+
+// NonWWWRedirectWithConfig returns an HTTPSRedirect middleware with config.
+// See `NonWWWRedirect()`.
+func NonWWWRedirectWithConfig(config RedirectConfig) echo.MiddlewareFunc {
+	return redirect(config, func(scheme, host, uri string) (ok bool, url string) {
+		if ok = host[:4] == www; ok {
+			url = scheme + "://" + host[4:] + uri
+		}
+		return
+	})
+}
+
+func redirect(config RedirectConfig, cb redirectLogic) echo.MiddlewareFunc {
+	if config.Skipper == nil {
+		config.Skipper = DefaultTrailingSlashConfig.Skipper
+	}
+	if config.Code == 0 {
+		config.Code = DefaultRedirectConfig.Code
+	}
+
+	return func(next echo.HandlerFunc) echo.HandlerFunc {
+		return func(c echo.Context) error {
+			if config.Skipper(c) {
+				return next(c)
+			}
+
+			req, scheme := c.Request(), c.Scheme()
+			host := req.Host
+			if ok, url := cb(scheme, host, req.RequestURI); ok {
+				return c.Redirect(config.Code, url)
+			}
+
+			return next(c)
+		}
+	}
+}

vendor/github.com/labstack/echo/v4/middleware/request_id.go

@@ -0,0 +1,64 @@
+package middleware
+
+import (
+	"github.com/labstack/echo/v4"
+	"github.com/labstack/gommon/random"
+)
+
+type (
+	// RequestIDConfig defines the config for RequestID middleware.
+	RequestIDConfig struct {
+		// Skipper defines a function to skip middleware.
+		Skipper Skipper
+
+		// Generator defines a function to generate an ID.
+		// Optional. Default value random.String(32).
+		Generator func() string
+	}
+)
+
+var (
+	// DefaultRequestIDConfig is the default RequestID middleware config.
+	DefaultRequestIDConfig = RequestIDConfig{
+		Skipper:   DefaultSkipper,
+		Generator: generator,
+	}
+)
+
+// RequestID returns a X-Request-ID middleware.
+func RequestID() echo.MiddlewareFunc {
+	return RequestIDWithConfig(DefaultRequestIDConfig)
+}
+
+// RequestIDWithConfig returns a X-Request-ID middleware with config.
+func RequestIDWithConfig(config RequestIDConfig) echo.MiddlewareFunc {
+	// Defaults
+	if config.Skipper == nil {
+		config.Skipper = DefaultRequestIDConfig.Skipper
+	}
+	if config.Generator == nil {
+		config.Generator = generator
+	}
+
+	return func(next echo.HandlerFunc) echo.HandlerFunc {
+		return func(c echo.Context) error {
+			if config.Skipper(c) {
+				return next(c)
+			}
+
+			req := c.Request()
+			res := c.Response()
+			rid := req.Header.Get(echo.HeaderXRequestID)
+			if rid == "" {
+				rid = config.Generator()
+			}
+			res.Header().Set(echo.HeaderXRequestID, rid)
+
+			return next(c)
+		}
+	}
+}
+
+func generator() string {
+	return random.String(32)
+}

vendor/github.com/labstack/echo/v4/middleware/rewrite.go

@@ -0,0 +1,85 @@
+package middleware
+
+import (
+	"regexp"
+	"strings"
+
+	"github.com/labstack/echo/v4"
+)
+
+type (
+	// RewriteConfig defines the config for Rewrite middleware.
+	RewriteConfig struct {
+		// Skipper defines a function to skip middleware.
+		Skipper Skipper
+
+		// Rules defines the URL path rewrite rules. The values captured in asterisk can be
+		// retrieved by index e.g. $1, $2 and so on.
+		// Example:
+		// "/old":              "/new",
+		// "/api/*":            "/$1",
+		// "/js/*":             "/public/javascripts/$1",
+		// "/users/*/orders/*": "/user/$1/order/$2",
+		// Required.
+		Rules map[string]string `yaml:"rules"`
+
+		rulesRegex map[*regexp.Regexp]string
+	}
+)
+
+var (
+	// DefaultRewriteConfig is the default Rewrite middleware config.
+	DefaultRewriteConfig = RewriteConfig{
+		Skipper: DefaultSkipper,
+	}
+)
+
+// Rewrite returns a Rewrite middleware.
+//
+// Rewrite middleware rewrites the URL path based on the provided rules.
+func Rewrite(rules map[string]string) echo.MiddlewareFunc {
+	c := DefaultRewriteConfig
+	c.Rules = rules
+	return RewriteWithConfig(c)
+}
+
+// RewriteWithConfig returns a Rewrite middleware with config.
+// See: `Rewrite()`.
+func RewriteWithConfig(config RewriteConfig) echo.MiddlewareFunc {
+	// Defaults
+	if config.Rules == nil {
+		panic("echo: rewrite middleware requires url path rewrite rules")
+	}
+	if config.Skipper == nil {
+		config.Skipper = DefaultBodyDumpConfig.Skipper
+	}
+	config.rulesRegex = map[*regexp.Regexp]string{}
+
+	// Initialize
+	for k, v := range config.Rules {
+		k = regexp.QuoteMeta(k)
+		k = strings.Replace(k, `\*`, "(.*)", -1)
+		k = k + "$"
+		config.rulesRegex[regexp.MustCompile(k)] = v
+	}
+
+	return func(next echo.HandlerFunc) echo.HandlerFunc {
+		return func(c echo.Context) (err error) {
+			if config.Skipper(c) {
+				return next(c)
+			}
+
+			req := c.Request()
+
+			// Rewrite
+			for k, v := range config.rulesRegex {
+				replacer := captureTokens(k, req.URL.Path)
+				if replacer != nil {
+					req.URL.Path = replacer.Replace(v)
+					break
+				}
+			}
+			return next(c)
+		}
+	}
+}

vendor/github.com/labstack/echo/v4/middleware/secure.go

@@ -0,0 +1,145 @@
+package middleware
+
+import (
+	"fmt"
+
+	"github.com/labstack/echo/v4"
+)
+
+type (
+	// SecureConfig defines the config for Secure middleware.
+	SecureConfig struct {
+		// Skipper defines a function to skip middleware.
+		Skipper Skipper
+
+		// XSSProtection provides protection against cross-site scripting attack (XSS)
+		// by setting the `X-XSS-Protection` header.
+		// Optional. Default value "1; mode=block".
+		XSSProtection string `yaml:"xss_protection"`
+
+		// ContentTypeNosniff provides protection against overriding Content-Type
+		// header by setting the `X-Content-Type-Options` header.
+		// Optional. Default value "nosniff".
+		ContentTypeNosniff string `yaml:"content_type_nosniff"`
+
+		// XFrameOptions can be used to indicate whether or not a browser should
+		// be allowed to render a page in a <frame>, <iframe> or <object> .
+		// Sites can use this to avoid clickjacking attacks, by ensuring that their
+		// content is not embedded into other sites.provides protection against
+		// clickjacking.
+		// Optional. Default value "SAMEORIGIN".
+		// Possible values:
+		// - "SAMEORIGIN" - The page can only be displayed in a frame on the same origin as the page itself.
+		// - "DENY" - The page cannot be displayed in a frame, regardless of the site attempting to do so.
+		// - "ALLOW-FROM uri" - The page can only be displayed in a frame on the specified origin.
+		XFrameOptions string `yaml:"x_frame_options"`
+
+		// HSTSMaxAge sets the `Strict-Transport-Security` header to indicate how
+		// long (in seconds) browsers should remember that this site is only to
+		// be accessed using HTTPS. This reduces your exposure to some SSL-stripping
+		// man-in-the-middle (MITM) attacks.
+		// Optional. Default value 0.
+		HSTSMaxAge int `yaml:"hsts_max_age"`
+
+		// HSTSExcludeSubdomains won't include subdomains tag in the `Strict Transport Security`
+		// header, excluding all subdomains from security policy. It has no effect
+		// unless HSTSMaxAge is set to a non-zero value.
+		// Optional. Default value false.
+		HSTSExcludeSubdomains bool `yaml:"hsts_exclude_subdomains"`
+
+		// ContentSecurityPolicy sets the `Content-Security-Policy` header providing
+		// security against cross-site scripting (XSS), clickjacking and other code
+		// injection attacks resulting from execution of malicious content in the
+		// trusted web page context.
+		// Optional. Default value "".
+		ContentSecurityPolicy string `yaml:"content_security_policy"`
+
+		// CSPReportOnly would use the `Content-Security-Policy-Report-Only` header instead
+		// of the `Content-Security-Policy` header. This allows iterative updates of the
+		// content security policy by only reporting the violations that would
+		// have occurred instead of blocking the resource.
+		// Optional. Default value false.
+		CSPReportOnly bool `yaml:"csp_report_only"`
+
+		// HSTSPreloadEnabled will add the preload tag in the `Strict Transport Security`
+		// header, which enables the domain to be included in the HSTS preload list
+		// maintained by Chrome (and used by Firefox and Safari): https://hstspreload.org/
+		// Optional.  Default value false.
+		HSTSPreloadEnabled bool `yaml:"hsts_preload_enabled"`
+
+		// ReferrerPolicy sets the `Referrer-Policy` header providing security against
+		// leaking potentially sensitive request paths to third parties.
+		// Optional. Default value "".
+		ReferrerPolicy string `yaml:"referrer_policy"`
+	}
+)
+
+var (
+	// DefaultSecureConfig is the default Secure middleware config.
+	DefaultSecureConfig = SecureConfig{
+		Skipper:            DefaultSkipper,
+		XSSProtection:      "1; mode=block",
+		ContentTypeNosniff: "nosniff",
+		XFrameOptions:      "SAMEORIGIN",
+		HSTSPreloadEnabled: false,
+	}
+)
+
+// Secure returns a Secure middleware.
+// Secure middleware provides protection against cross-site scripting (XSS) attack,
+// content type sniffing, clickjacking, insecure connection and other code injection
+// attacks.
+func Secure() echo.MiddlewareFunc {
+	return SecureWithConfig(DefaultSecureConfig)
+}
+
+// SecureWithConfig returns a Secure middleware with config.
+// See: `Secure()`.
+func SecureWithConfig(config SecureConfig) echo.MiddlewareFunc {
+	// Defaults
+	if config.Skipper == nil {
+		config.Skipper = DefaultSecureConfig.Skipper
+	}
+
+	return func(next echo.HandlerFunc) echo.HandlerFunc {
+		return func(c echo.Context) error {
+			if config.Skipper(c) {
+				return next(c)
+			}
+
+			req := c.Request()
+			res := c.Response()
+
+			if config.XSSProtection != "" {
+				res.Header().Set(echo.HeaderXXSSProtection, config.XSSProtection)
+			}
+			if config.ContentTypeNosniff != "" {
+				res.Header().Set(echo.HeaderXContentTypeOptions, config.ContentTypeNosniff)
+			}
+			if config.XFrameOptions != "" {
+				res.Header().Set(echo.HeaderXFrameOptions, config.XFrameOptions)
+			}
+			if (c.IsTLS() || (req.Header.Get(echo.HeaderXForwardedProto) == "https")) && config.HSTSMaxAge != 0 {
+				subdomains := ""
+				if !config.HSTSExcludeSubdomains {
+					subdomains = "; includeSubdomains"
+				}
+				if config.HSTSPreloadEnabled {
+					subdomains = fmt.Sprintf("%s; preload", subdomains)
+				}
+				res.Header().Set(echo.HeaderStrictTransportSecurity, fmt.Sprintf("max-age=%d%s", config.HSTSMaxAge, subdomains))
+			}
+			if config.ContentSecurityPolicy != "" {
+				if config.CSPReportOnly {
+					res.Header().Set(echo.HeaderContentSecurityPolicyReportOnly, config.ContentSecurityPolicy)
+				} else {
+					res.Header().Set(echo.HeaderContentSecurityPolicy, config.ContentSecurityPolicy)
+				}
+			}
+			if config.ReferrerPolicy != "" {
+				res.Header().Set(echo.HeaderReferrerPolicy, config.ReferrerPolicy)
+			}
+			return next(c)
+		}
+	}
+}

vendor/github.com/labstack/echo/v4/middleware/slash.go

@@ -0,0 +1,121 @@
+package middleware
+
+import (
+	"strings"
+
+	"github.com/labstack/echo/v4"
+)
+
+type (
+	// TrailingSlashConfig defines the config for TrailingSlash middleware.
+	TrailingSlashConfig struct {
+		// Skipper defines a function to skip middleware.
+		Skipper Skipper
+
+		// Status code to be used when redirecting the request.
+		// Optional, but when provided the request is redirected using this code.
+		RedirectCode int `yaml:"redirect_code"`
+	}
+)
+
+var (
+	// DefaultTrailingSlashConfig is the default TrailingSlash middleware config.
+	DefaultTrailingSlashConfig = TrailingSlashConfig{
+		Skipper: DefaultSkipper,
+	}
+)
+
+// AddTrailingSlash returns a root level (before router) middleware which adds a
+// trailing slash to the request `URL#Path`.
+//
+// Usage `Echo#Pre(AddTrailingSlash())`
+func AddTrailingSlash() echo.MiddlewareFunc {
+	return AddTrailingSlashWithConfig(DefaultTrailingSlashConfig)
+}
+
+// AddTrailingSlashWithConfig returns a AddTrailingSlash middleware with config.
+// See `AddTrailingSlash()`.
+func AddTrailingSlashWithConfig(config TrailingSlashConfig) echo.MiddlewareFunc {
+	// Defaults
+	if config.Skipper == nil {
+		config.Skipper = DefaultTrailingSlashConfig.Skipper
+	}
+
+	return func(next echo.HandlerFunc) echo.HandlerFunc {
+		return func(c echo.Context) error {
+			if config.Skipper(c) {
+				return next(c)
+			}
+
+			req := c.Request()
+			url := req.URL
+			path := url.Path
+			qs := c.QueryString()
+			if !strings.HasSuffix(path, "/") {
+				path += "/"
+				uri := path
+				if qs != "" {
+					uri += "?" + qs
+				}
+
+				// Redirect
+				if config.RedirectCode != 0 {
+					return c.Redirect(config.RedirectCode, uri)
+				}
+
+				// Forward
+				req.RequestURI = uri
+				url.Path = path
+			}
+			return next(c)
+		}
+	}
+}
+
+// RemoveTrailingSlash returns a root level (before router) middleware which removes
+// a trailing slash from the request URI.
+//
+// Usage `Echo#Pre(RemoveTrailingSlash())`
+func RemoveTrailingSlash() echo.MiddlewareFunc {
+	return RemoveTrailingSlashWithConfig(TrailingSlashConfig{})
+}
+
+// RemoveTrailingSlashWithConfig returns a RemoveTrailingSlash middleware with config.
+// See `RemoveTrailingSlash()`.
+func RemoveTrailingSlashWithConfig(config TrailingSlashConfig) echo.MiddlewareFunc {
+	// Defaults
+	if config.Skipper == nil {
+		config.Skipper = DefaultTrailingSlashConfig.Skipper
+	}
+
+	return func(next echo.HandlerFunc) echo.HandlerFunc {
+		return func(c echo.Context) error {
+			if config.Skipper(c) {
+				return next(c)
+			}
+
+			req := c.Request()
+			url := req.URL
+			path := url.Path
+			qs := c.QueryString()
+			l := len(path) - 1
+			if l > 0 && strings.HasSuffix(path, "/") {
+				path = path[:l]
+				uri := path
+				if qs != "" {
+					uri += "?" + qs
+				}
+
+				// Redirect
+				if config.RedirectCode != 0 {
+					return c.Redirect(config.RedirectCode, uri)
+				}
+
+				// Forward
+				req.RequestURI = uri
+				url.Path = path
+			}
+			return next(c)
+		}
+	}
+}

vendor/github.com/labstack/echo/v4/middleware/static.go

@@ -0,0 +1,229 @@
+package middleware
+
+import (
+	"fmt"
+	"html/template"
+	"net/http"
+	"net/url"
+	"os"
+	"path"
+	"path/filepath"
+	"strings"
+
+	"github.com/labstack/echo/v4"
+	"github.com/labstack/gommon/bytes"
+)
+
+type (
+	// StaticConfig defines the config for Static middleware.
+	StaticConfig struct {
+		// Skipper defines a function to skip middleware.
+		Skipper Skipper
+
+		// Root directory from where the static content is served.
+		// Required.
+		Root string `yaml:"root"`
+
+		// Index file for serving a directory.
+		// Optional. Default value "index.html".
+		Index string `yaml:"index"`
+
+		// Enable HTML5 mode by forwarding all not-found requests to root so that
+		// SPA (single-page application) can handle the routing.
+		// Optional. Default value false.
+		HTML5 bool `yaml:"html5"`
+
+		// Enable directory browsing.
+		// Optional. Default value false.
+		Browse bool `yaml:"browse"`
+	}
+)
+
+const html = `
+<!DOCTYPE html>
+<html lang="en">
+<head>
+  <meta charset="UTF-8">
+  <meta name="viewport" content="width=device-width, initial-scale=1.0">
+  <meta http-equiv="X-UA-Compatible" content="ie=edge">
+  <title>{{ .Name }}</title>
+  <style>
+    body {
+			font-family: Menlo, Consolas, monospace;
+			padding: 48px;
+		}
+		header {
+			padding: 4px 16px;
+			font-size: 24px;
+		}
+    ul {
+			list-style-type: none;
+			margin: 0;
+    	padding: 20px 0 0 0;
+			display: flex;
+			flex-wrap: wrap;
+    }
+    li {
+			width: 300px;
+			padding: 16px;
+		}
+		li a {
+			display: block;
+			overflow: hidden;
+			white-space: nowrap;
+			text-overflow: ellipsis;
+			text-decoration: none;
+			transition: opacity 0.25s;
+		}
+		li span {
+			color: #707070;
+			font-size: 12px;
+		}
+		li a:hover {
+			opacity: 0.50;
+		}
+		.dir {
+			color: #E91E63;
+		}
+		.file {
+			color: #673AB7;
+		}
+  </style>
+</head>
+<body>
+	<header>
+		{{ .Name }}
+	</header>
+	<ul>
+		{{ range .Files }}
+		<li>
+		{{ if .Dir }}
+			{{ $name := print .Name "/" }}
+			<a class="dir" href="{{ $name }}">{{ $name }}</a>
+			{{ else }}
+			<a class="file" href="{{ .Name }}">{{ .Name }}</a>
+			<span>{{ .Size }}</span>
+		{{ end }}
+		</li>
+		{{ end }}
+  </ul>
+</body>
+</html>
+`
+
+var (
+	// DefaultStaticConfig is the default Static middleware config.
+	DefaultStaticConfig = StaticConfig{
+		Skipper: DefaultSkipper,
+		Index:   "index.html",
+	}
+)
+
+// Static returns a Static middleware to serves static content from the provided
+// root directory.
+func Static(root string) echo.MiddlewareFunc {
+	c := DefaultStaticConfig
+	c.Root = root
+	return StaticWithConfig(c)
+}
+
+// StaticWithConfig returns a Static middleware with config.
+// See `Static()`.
+func StaticWithConfig(config StaticConfig) echo.MiddlewareFunc {
+	// Defaults
+	if config.Root == "" {
+		config.Root = "." // For security we want to restrict to CWD.
+	}
+	if config.Skipper == nil {
+		config.Skipper = DefaultStaticConfig.Skipper
+	}
+	if config.Index == "" {
+		config.Index = DefaultStaticConfig.Index
+	}
+
+	// Index template
+	t, err := template.New("index").Parse(html)
+	if err != nil {
+		panic(fmt.Sprintf("echo: %v", err))
+	}
+
+	return func(next echo.HandlerFunc) echo.HandlerFunc {
+		return func(c echo.Context) (err error) {
+			if config.Skipper(c) {
+				return next(c)
+			}
+
+			p := c.Request().URL.Path
+			if strings.HasSuffix(c.Path(), "*") { // When serving from a group, e.g. `/static*`.
+				p = c.Param("*")
+			}
+			p, err = url.PathUnescape(p)
+			if err != nil {
+				return
+			}
+			name := filepath.Join(config.Root, path.Clean("/"+p)) // "/"+ for security
+
+			fi, err := os.Stat(name)
+			if err != nil {
+				if os.IsNotExist(err) {
+					if err = next(c); err != nil {
+						if he, ok := err.(*echo.HTTPError); ok {
+							if config.HTML5 && he.Code == http.StatusNotFound {
+								return c.File(filepath.Join(config.Root, config.Index))
+							}
+						}
+						return
+					}
+				}
+				return
+			}
+
+			if fi.IsDir() {
+				index := filepath.Join(name, config.Index)
+				fi, err = os.Stat(index)
+
+				if err != nil {
+					if config.Browse {
+						return listDir(t, name, c.Response())
+					}
+					if os.IsNotExist(err) {
+						return next(c)
+					}
+					return
+				}
+
+				return c.File(index)
+			}
+
+			return c.File(name)
+		}
+	}
+}
+
+func listDir(t *template.Template, name string, res *echo.Response) (err error) {
+	file, err := os.Open(name)
+	if err != nil {
+		return
+	}
+	files, err := file.Readdir(-1)
+	if err != nil {
+		return
+	}
+
+	// Create directory index
+	res.Header().Set(echo.HeaderContentType, echo.MIMETextHTMLCharsetUTF8)
+	data := struct {
+		Name  string
+		Files []interface{}
+	}{
+		Name: name,
+	}
+	for _, f := range files {
+		data.Files = append(data.Files, struct {
+			Name string
+			Dir  bool
+			Size string
+		}{f.Name(), f.IsDir(), bytes.Format(f.Size())})
+	}
+	return t.Execute(res, data)
+}

vendor/github.com/labstack/echo/v4/middleware/util.go

@@ -0,0 +1,54 @@
+package middleware
+
+import (
+	"strings"
+)
+
+func matchScheme(domain, pattern string) bool {
+	didx := strings.Index(domain, ":")
+	pidx := strings.Index(pattern, ":")
+	return didx != -1 && pidx != -1 && domain[:didx] == pattern[:pidx]
+}
+
+// matchSubdomain compares authority with wildcard
+func matchSubdomain(domain, pattern string) bool {
+	if !matchScheme(domain, pattern) {
+		return false
+	}
+	didx := strings.Index(domain, "://")
+	pidx := strings.Index(pattern, "://")
+	if didx == -1 || pidx == -1 {
+		return false
+	}
+	domAuth := domain[didx+3:]
+	// to avoid long loop by invalid long domain
+	if len(domAuth) > 253 {
+		return false
+	}
+	patAuth := pattern[pidx+3:]
+
+	domComp := strings.Split(domAuth, ".")
+	patComp := strings.Split(patAuth, ".")
+	for i := len(domComp)/2 - 1; i >= 0; i-- {
+		opp := len(domComp) - 1 - i
+		domComp[i], domComp[opp] = domComp[opp], domComp[i]
+	}
+	for i := len(patComp)/2 - 1; i >= 0; i-- {
+		opp := len(patComp) - 1 - i
+		patComp[i], patComp[opp] = patComp[opp], patComp[i]
+	}
+
+	for i, v := range domComp {
+		if len(patComp) <= i {
+			return false
+		}
+		p := patComp[i]
+		if p == "*" {
+			return true
+		}
+		if p != v {
+			return false
+		}
+	}
+	return false
+}

vendor/github.com/labstack/gommon/bytes/README.md

@@ -0,0 +1,29 @@
+# Bytes
+
+- Format bytes integer to human readable bytes string.
+- Parse human readable bytes string to bytes integer.
+
+## Installation
+
+```go
+go get github.com/labstack/gommon/bytes
+```
+
+## [Usage](https://github.com/labstack/gommon/blob/master/bytes/bytes_test.go)
+
+### Format
+
+```go
+println(bytes.Format(13231323))
+```
+
+`12.62MB`
+
+### Parse
+
+```go
+b, _ = Parse("2M")
+println(b)
+```
+
+`2097152`

vendor/github.com/labstack/gommon/bytes/bytes.go

@@ -0,0 +1,109 @@
+package bytes
+
+import (
+	"fmt"
+	"regexp"
+	"strconv"
+	"strings"
+)
+
+type (
+	// Bytes struct
+	Bytes struct{}
+)
+
+const (
+	_ = 1.0 << (10 * iota) // ignore first value by assigning to blank identifier
+	KB
+	MB
+	GB
+	TB
+	PB
+	EB
+)
+
+var (
+	pattern = regexp.MustCompile(`(?i)^(-?\d+(?:\.\d+)?)\s?([KMGTPE]B?|B?)$`)
+	global  = New()
+)
+
+// New creates a Bytes instance.
+func New() *Bytes {
+	return &Bytes{}
+}
+
+// Format formats bytes integer to human readable string.
+// For example, 31323 bytes will return 30.59KB.
+func (*Bytes) Format(b int64) string {
+	multiple := ""
+	value := float64(b)
+
+	switch {
+	case b >= EB:
+		value /= EB
+		multiple = "EB"
+	case b >= PB:
+		value /= PB
+		multiple = "PB"
+	case b >= TB:
+		value /= TB
+		multiple = "TB"
+	case b >= GB:
+		value /= GB
+		multiple = "GB"
+	case b >= MB:
+		value /= MB
+		multiple = "MB"
+	case b >= KB:
+		value /= KB
+		multiple = "KB"
+	case b == 0:
+		return "0"
+	default:
+		return strconv.FormatInt(b, 10) + "B"
+	}
+
+	return fmt.Sprintf("%.2f%s", value, multiple)
+}
+
+// Parse parses human readable bytes string to bytes integer.
+// For example, 6GB (6G is also valid) will return 6442450944.
+func (*Bytes) Parse(value string) (i int64, err error) {
+	parts := pattern.FindStringSubmatch(value)
+	if len(parts) < 3 {
+		return 0, fmt.Errorf("error parsing value=%s", value)
+	}
+	bytesString := parts[1]
+	multiple := strings.ToUpper(parts[2])
+	bytes, err := strconv.ParseFloat(bytesString, 64)
+	if err != nil {
+		return
+	}
+
+	switch multiple {
+	default:
+		return int64(bytes), nil
+	case "K", "KB":
+		return int64(bytes * KB), nil
+	case "M", "MB":
+		return int64(bytes * MB), nil
+	case "G", "GB":
+		return int64(bytes * GB), nil
+	case "T", "TB":
+		return int64(bytes * TB), nil
+	case "P", "PB":
+		return int64(bytes * PB), nil
+	case "E", "EB":
+		return int64(bytes * EB), nil
+	}
+}
+
+// Format wraps global Bytes's Format function.
+func Format(b int64) string {
+	return global.Format(b)
+}
+
+// Parse wraps global Bytes's Parse function.
+func Parse(val string) (int64, error) {
+	return global.Parse(val)
+}

vendor/github.com/labstack/gommon/random/random.go

@@ -0,0 +1,48 @@
+package random
+
+import (
+	"math/rand"
+	"strings"
+	"time"
+)
+
+type (
+	Random struct {
+	}
+)
+
+// Charsets
+const (
+	Uppercase    = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
+	Lowercase    = "abcdefghijklmnopqrstuvwxyz"
+	Alphabetic   = Uppercase + Lowercase
+	Numeric      = "0123456789"
+	Alphanumeric = Alphabetic + Numeric
+	Symbols      = "`" + `~!@#$%^&*()-_+={}[]|\;:"<>,./?`
+	Hex          = Numeric + "abcdef"
+)
+
+var (
+	global = New()
+)
+
+func New() *Random {
+	rand.Seed(time.Now().UnixNano())
+	return new(Random)
+}
+
+func (r *Random) String(length uint8, charsets ...string) string {
+	charset := strings.Join(charsets, "")
+	if charset == "" {
+		charset = Alphanumeric
+	}
+	b := make([]byte, length)
+	for i := range b {
+		b[i] = charset[rand.Int63()%int64(len(charset))]
+	}
+	return string(b)
+}
+
+func String(length uint8, charsets ...string) string {
+	return global.String(length, charsets...)
+}

vendor/modules.txt

@@ -1,11 +1,18 @@
+# github.com/dgrijalva/jwt-go v3.2.0+incompatible
+github.com/dgrijalva/jwt-go
 # github.com/golang/snappy v0.0.0-20180518054509-2e65f85255db
 github.com/golang/snappy
+# github.com/labstack/echo v3.3.10+incompatible
+## explicit
 # github.com/labstack/echo/v4 v4.1.16
 ## explicit
 github.com/labstack/echo/v4
+github.com/labstack/echo/v4/middleware
 # github.com/labstack/gommon v0.3.0
+github.com/labstack/gommon/bytes
 github.com/labstack/gommon/color
 github.com/labstack/gommon/log
+github.com/labstack/gommon/random
 # github.com/lib/pq v1.7.0
 ## explicit
 github.com/lib/pq