55 lines
1016 B
Go
55 lines
1016 B
Go
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package main
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import (
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"context"
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"fmt"
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"net"
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"time"
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"github.com/pion/mdns"
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"golang.org/x/net/ipv4"
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)
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type Proxy struct {
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SCHEME string
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HOSTNAME string
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PORT int
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}
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func (p *Proxy) Format() string {
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return fmt.Sprintf(TMPL, p.SCHEME, p.HOSTNAME, p.PORT)
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}
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var DEFAULT_PORT = 8000
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var DEFAULT_PROXY = Proxy{SCHEME: "http", HOSTNAME: "apt.paulbsd.com", PORT: 8001}
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const TMPL = "%s://%s:%d"
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func main() {
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addr, err := net.ResolveUDPAddr("udp", mdns.DefaultAddress)
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if err != nil {
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panic(err)
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}
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l, err := net.ListenUDP("udp4", addr)
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if err != nil {
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panic(err)
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}
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server, err := mdns.Server(ipv4.NewPacketConn(l), &mdns.Config{})
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if err != nil {
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panic(err)
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}
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ctx, cancel := context.WithTimeout(context.Background(), 1*time.Second)
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defer cancel()
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_, src, err := server.Query(ctx, "apt.local")
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if err != nil {
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var res = DEFAULT_PROXY
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fmt.Println(res.Format())
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return
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}
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var res = Proxy{SCHEME: "http", HOSTNAME: src.String(), PORT: DEFAULT_PORT}
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fmt.Println(res.Format())
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}
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