63 lines
1.5 KiB
Go
63 lines
1.5 KiB
Go
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//go:build !go1.16
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// +build !go1.16
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package echo
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import (
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"net/http"
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"net/url"
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"os"
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"path/filepath"
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)
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type filesystem struct {
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}
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func createFilesystem() filesystem {
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return filesystem{}
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}
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// Static registers a new route with path prefix to serve static files from the
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// provided root directory.
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func (e *Echo) Static(prefix, root string) *Route {
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if root == "" {
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root = "." // For security we want to restrict to CWD.
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}
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return e.static(prefix, root, e.GET)
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}
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func (common) static(prefix, root string, get func(string, HandlerFunc, ...MiddlewareFunc) *Route) *Route {
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h := func(c Context) error {
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p, err := url.PathUnescape(c.Param("*"))
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if err != nil {
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return err
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}
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name := filepath.Join(root, filepath.Clean("/"+p)) // "/"+ for security
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fi, err := os.Stat(name)
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if err != nil {
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// The access path does not exist
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return NotFoundHandler(c)
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}
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// If the request is for a directory and does not end with "/"
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p = c.Request().URL.Path // path must not be empty.
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if fi.IsDir() && p[len(p)-1] != '/' {
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// Redirect to ends with "/"
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return c.Redirect(http.StatusMovedPermanently, p+"/")
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}
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return c.File(name)
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}
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// Handle added routes based on trailing slash:
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// /prefix => exact route "/prefix" + any route "/prefix/*"
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// /prefix/ => only any route "/prefix/*"
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if prefix != "" {
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if prefix[len(prefix)-1] == '/' {
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// Only add any route for intentional trailing slash
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return get(prefix+"*", h)
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}
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get(prefix, h)
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}
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return get(prefix+"/*", h)
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}
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