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Add WSS Browser Dialer support (#421)
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RPRX
GitHub
parent
0470381fe2
commit
d46af8b5d4
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@ -2,8 +2,12 @@ package websocket
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import (
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"context"
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_ "embed"
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"encoding/base64"
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"fmt"
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"io"
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"net/http"
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"os"
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"time"
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"github.com/gorilla/websocket"
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@ -15,6 +19,27 @@ import (
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"github.com/xtls/xray-core/transport/internet/tls"
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)
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//go:embed dialer.html
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var webpage []byte
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var conns chan *websocket.Conn
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func init() {
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if addr := os.Getenv("XRAY_BROWSER_DIALER"); addr != "" {
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conns = make(chan *websocket.Conn, 256)
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go http.ListenAndServe(addr, http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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if r.URL.Path == "/websocket" {
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if conn, err := upgrader.Upgrade(w, r, nil); err == nil {
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conns <- conn
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} else {
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fmt.Println("unexpected error")
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}
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} else {
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w.Write(webpage)
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}
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}))
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}
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}
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// Dial dials a WebSocket connection to the given destination.
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func Dial(ctx context.Context, dest net.Destination, streamSettings *internet.MemoryStreamConfig) (internet.Connection, error) {
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newError("creating connection to ", dest).WriteToLog(session.ExportIDToError(ctx))
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@ -66,6 +91,30 @@ func dialWebSocket(ctx context.Context, dest net.Destination, streamSettings *in
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}
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uri := protocol + "://" + host + wsSettings.GetNormalizedPath()
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if conns != nil {
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data := []byte(uri)
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if ed != nil {
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data = append(data, " "+base64.RawURLEncoding.EncodeToString(ed)...)
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}
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var conn *websocket.Conn
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for {
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conn = <-conns
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if conn.WriteMessage(websocket.TextMessage, data) != nil {
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conn.Close()
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} else {
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break
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}
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}
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if _, p, err := conn.ReadMessage(); err != nil {
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conn.Close()
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return nil, err
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} else if s := string(p); s != "ok" {
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conn.Close()
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return nil, newError(s)
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}
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return newConnection(conn, conn.RemoteAddr(), nil), nil
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}
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header := wsSettings.GetRequestHeader()
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if ed != nil {
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header.Set("Sec-WebSocket-Protocol", base64.StdEncoding.EncodeToString(ed))
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@ -0,0 +1,55 @@
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<!DOCTYPE html>
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<html>
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<head>
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<title>Browser Dialer</title>
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</head>
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<body></body>
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<script>
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// Copyright (c) 2021 XRAY. Mozilla Public License 2.0.
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var url = "ws://" + window.location.host + "/websocket"
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var count = 0
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setInterval(check, 1000)
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function check() {
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if (count <= 0) {
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count += 1
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console.log("Prepare", url)
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var ws = new WebSocket(url)
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var wss = undefined
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var first = true
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ws.onmessage = function (event) {
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if (first) {
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first = false
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count -= 1
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var arr = event.data.split(" ")
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console.log("Dial", arr[0], arr[1])
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wss = new WebSocket(arr[0], arr[1])
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var opened = false
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wss.onopen = function (event) {
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opened = true
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ws.send("ok")
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}
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wss.onmessage = function (event) {
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ws.send(event.data)
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}
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wss.onclose = function (event) {
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ws.close()
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}
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wss.onerror = function (event) {
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!opened && ws.send("fail")
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wss.close()
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}
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check()
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} else wss.send(event.data)
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}
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ws.onclose = function (event) {
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if (first) count -= 1
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else wss.close()
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}
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ws.onerror = function (event) {
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ws.close()
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}
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}
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}
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</script>
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</body>
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</html>
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@ -7,6 +7,7 @@ import (
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"encoding/base64"
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"io"
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"net/http"
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"strings"
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"sync"
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"time"
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@ -25,6 +26,8 @@ type requestHandler struct {
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ln *Listener
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}
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var replacer = strings.NewReplacer("+", "-", "/", "_", "=", "")
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var upgrader = &websocket.Upgrader{
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ReadBufferSize: 4 * 1024,
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WriteBufferSize: 4 * 1024,
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@ -39,7 +42,17 @@ func (h *requestHandler) ServeHTTP(writer http.ResponseWriter, request *http.Req
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writer.WriteHeader(http.StatusNotFound)
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return
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}
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conn, err := upgrader.Upgrade(writer, request, nil)
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var extraReader io.Reader
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var responseHeader = http.Header{}
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if str := request.Header.Get("Sec-WebSocket-Protocol"); str != "" {
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if ed, err := base64.RawURLEncoding.DecodeString(replacer.Replace(str)); err == nil && len(ed) > 0 {
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extraReader = bytes.NewReader(ed)
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responseHeader.Set("Sec-WebSocket-Protocol", str)
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}
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}
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conn, err := upgrader.Upgrade(writer, request, responseHeader)
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if err != nil {
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newError("failed to convert to WebSocket connection").Base(err).WriteToLog()
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return
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@ -54,12 +67,6 @@ func (h *requestHandler) ServeHTTP(writer http.ResponseWriter, request *http.Req
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}
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}
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var extraReader io.Reader
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if str := request.Header.Get("Sec-WebSocket-Protocol"); str != "" {
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if ed, err := base64.StdEncoding.DecodeString(str); err == nil && len(ed) > 0 {
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extraReader = bytes.NewReader(ed)
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}
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}
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h.ln.addConn(newConnection(conn, remoteAddr, extraReader))
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}
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@ -128,7 +135,7 @@ func ListenWS(ctx context.Context, address net.Address, port net.Port, streamSet
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ln: l,
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},
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ReadHeaderTimeout: time.Second * 4,
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MaxHeaderBytes: 2048,
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MaxHeaderBytes: 4096,
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}
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go func() {
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