117 lines
2.2 KiB
Go
117 lines
2.2 KiB
Go
package proxy
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import (
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"bufio"
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"bytes"
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"fmt"
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"io"
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"net"
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"net/http"
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"net/http/httputil"
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"strings"
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"github.com/Dreamacro/clash/constant"
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"github.com/riobard/go-shadowsocks2/socks"
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log "github.com/sirupsen/logrus"
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)
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func NewHttpProxy(port string) {
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server := &http.Server{
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Addr: fmt.Sprintf(":%s", port),
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Handler: http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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if r.Method == http.MethodConnect {
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handleTunneling(w, r)
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} else {
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handleHTTP(w, r)
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}
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}),
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}
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log.Infof("HTTP proxy :%s", port)
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server.ListenAndServe()
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}
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func handleHTTP(w http.ResponseWriter, r *http.Request) {
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buf, _ := httputil.DumpRequestOut(r, true)
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hijacker, ok := w.(http.Hijacker)
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if !ok {
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return
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}
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conn, rw, err := hijacker.Hijack()
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if err != nil {
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return
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}
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addr := r.Host
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// padding default port
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if !strings.Contains(addr, ":") {
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addr += ":80"
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}
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tun.Add(NewHttp(addr, conn, rw, buf))
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}
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func handleTunneling(w http.ResponseWriter, r *http.Request) {
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hijacker, ok := w.(http.Hijacker)
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if !ok {
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return
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}
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conn, rw, err := hijacker.Hijack()
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if err != nil {
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return
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}
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// w.WriteHeader(http.StatusOK) doesn't works in Safari
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conn.Write([]byte("HTTP/1.1 200 OK\r\n\r\n"))
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tun.Add(NewHttp(r.Host, conn, rw, []byte{}))
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}
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type HttpAdapter struct {
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addr *constant.Addr
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conn net.Conn
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r io.Reader
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}
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func (h *HttpAdapter) Writer() io.Writer {
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return h.conn
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}
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func (h *HttpAdapter) Reader() io.Reader {
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return h.r
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}
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func (h *HttpAdapter) Close() {
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h.conn.Close()
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}
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func (h *HttpAdapter) Addr() *constant.Addr {
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return h.addr
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}
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func parseHttpAddr(target string) *constant.Addr {
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host, port, _ := net.SplitHostPort(target)
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ipAddr, _ := net.ResolveIPAddr("ip", host)
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var addType int
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ip := net.ParseIP(host)
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switch {
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case ip == nil:
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addType = socks.AtypDomainName
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case ip.To4() == nil:
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addType = socks.AtypIPv6
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default:
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addType = socks.AtypIPv4
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}
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return &constant.Addr{
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AddrType: addType,
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Host: host,
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IP: &ipAddr.IP,
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Port: port,
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}
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}
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func NewHttp(host string, conn net.Conn, rw *bufio.ReadWriter, payload []byte) *HttpAdapter {
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r := io.MultiReader(bytes.NewReader(payload), rw)
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return &HttpAdapter{
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conn: conn,
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addr: parseHttpAddr(host),
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r: r,
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}
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}
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