Improve: using native http request

proxy/http/server.go

@@ -0,0 +1,81 @@
+package http
+
+import (
+	"fmt"
+	"net"
+	"net/http"
+	"strings"
+
+	C "github.com/Dreamacro/clash/constant"
+	"github.com/Dreamacro/clash/tunnel"
+
+	"github.com/riobard/go-shadowsocks2/socks"
+	log "github.com/sirupsen/logrus"
+)
+
+var (
+	tun = tunnel.GetInstance()
+)
+
+func NewHttpProxy(port string) {
+	server := &http.Server{
+		Addr: fmt.Sprintf(":%s", port),
+		Handler: http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+			if r.Method == http.MethodConnect {
+				handleTunneling(w, r)
+			} else {
+				handleHTTP(w, r)
+			}
+		}),
+	}
+	log.Infof("HTTP proxy :%s", port)
+	server.ListenAndServe()
+}
+
+func handleHTTP(w http.ResponseWriter, r *http.Request) {
+	addr := r.Host
+	// padding default port
+	if !strings.Contains(addr, ":") {
+		addr += ":80"
+	}
+	req, done := NewHttp(addr, w, r)
+	tun.Add(req)
+	<-done
+}
+
+func handleTunneling(w http.ResponseWriter, r *http.Request) {
+	hijacker, ok := w.(http.Hijacker)
+	if !ok {
+		return
+	}
+	conn, _, err := hijacker.Hijack()
+	if err != nil {
+		return
+	}
+	// w.WriteHeader(http.StatusOK) doesn't works in Safari
+	conn.Write([]byte("HTTP/1.1 200 OK\r\n\r\n"))
+	tun.Add(NewHttps(r.Host, conn))
+}
+
+func parseHttpAddr(target string) *C.Addr {
+	host, port, _ := net.SplitHostPort(target)
+	ipAddr, _ := net.ResolveIPAddr("ip", host)
+	var addType int
+	ip := net.ParseIP(host)
+	switch {
+	case ip == nil:
+		addType = socks.AtypDomainName
+	case ip.To4() == nil:
+		addType = socks.AtypIPv6
+	default:
+		addType = socks.AtypIPv4
+	}
+
+	return &C.Addr{
+		NetWork:  C.TCP,
+		AddrType: addType,
+		Host:     host,
+		IP:       &ipAddr.IP,
+		Port:     port,
+	}
+}