Golang IPv6 服务器

Question

如何创建 ipv6 服务器。 ipv4服务器看起来像

package main

import (
    "fmt"
    "net/http"
)

func h(w http.ResponseWriter, r *http.Request) {
    fmt.Fprintf(w, "Test")
}

func main() {
    http.HandleFunc("/", h)
    http.ListenAndServe(":80", nil)
}

但是如何在 80 端口监听 ipv6

Answer 1

它已经在侦听 ipv6（以及 ipv4）。

func ListenAndServe(addr string, handler Handler) error {
    server := &Server{Addr: addr, Handler: handler}
    return server.ListenAndServe()
}

// ListenAndServe listens on the TCP network address srv.Addr and then
// calls Serve to handle requests on incoming connections.
// Accepted connections are configured to enable TCP keep-alives.
// If srv.Addr is blank, ":http" is used.
// ListenAndServe always returns a non-nil error.
func (srv *Server) ListenAndServe() error {
    addr := srv.Addr
    if addr == "" {
        addr = ":http"
    }
    ln, err := net.Listen("tcp", addr)
    if err != nil {
        return err
    }
    return srv.Serve(tcpKeepAliveListener{ln.(*net.TCPListener)})
}

如果你想只在 ipv6 上收听，你可以这样做

func ListenAndServe(addr string, handler Handler) error {
    srv := &http.Server{Addr: addr, Handler: handler}
    addr := srv.Addr
    if addr == "" {
        addr = ":http"
    }
    ln, err := net.Listen("tcp6", addr) // <--- tcp6 here
    if err != nil {
        return err
    }
    return srv.Serve(tcpKeepAliveListener{ln.(*net.TCPListener)})
}