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Add WSS Browser Dialer support (#421)

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RPRX 2021-03-23 09:25:35 +00:00 committed by GitHub
parent 0470381fe2
commit d46af8b5d4
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GPG key ID: 4AEE18F83AFDEB23
3 changed files with 119 additions and 8 deletions
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49
transport/internet/websocket/dialer.go
View file

@ -2,8 +2,12 @@ package websocket
import ( import (
"context" "context"
_ "embed"
"encoding/base64" "encoding/base64"
"fmt"
"io" "io"
"net/http"
"os"
"time" "time"
"github.com/gorilla/websocket" "github.com/gorilla/websocket"
@ -15,6 +19,27 @@ import (
"github.com/xtls/xray-core/transport/internet/tls" "github.com/xtls/xray-core/transport/internet/tls"
) )
//go:embed dialer.html
var webpage []byte
var conns chan *websocket.Conn
func init() {
if addr := os.Getenv("XRAY_BROWSER_DIALER"); addr != "" {
conns = make(chan *websocket.Conn, 256)
go http.ListenAndServe(addr, http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
if r.URL.Path == "/websocket" {
if conn, err := upgrader.Upgrade(w, r, nil); err == nil {
conns <- conn
} else {
fmt.Println("unexpected error")
}
} else {
w.Write(webpage)
}
}))
}
}
// Dial dials a WebSocket connection to the given destination. // Dial dials a WebSocket connection to the given destination.
func Dial(ctx context.Context, dest net.Destination, streamSettings *internet.MemoryStreamConfig) (internet.Connection, error) { func Dial(ctx context.Context, dest net.Destination, streamSettings *internet.MemoryStreamConfig) (internet.Connection, error) {
newError("creating connection to ", dest).WriteToLog(session.ExportIDToError(ctx)) newError("creating connection to ", dest).WriteToLog(session.ExportIDToError(ctx))
@ -66,6 +91,30 @@ func dialWebSocket(ctx context.Context, dest net.Destination, streamSettings *in
} }
uri := protocol + "://" + host + wsSettings.GetNormalizedPath() uri := protocol + "://" + host + wsSettings.GetNormalizedPath()
if conns != nil {
data := []byte(uri)
if ed != nil {
data = append(data, " "+base64.RawURLEncoding.EncodeToString(ed)...)
}
var conn *websocket.Conn
for {
conn = <-conns
if conn.WriteMessage(websocket.TextMessage, data) != nil {
conn.Close()
} else {
break
}
}
if _, p, err := conn.ReadMessage(); err != nil {
conn.Close()
return nil, err
} else if s := string(p); s != "ok" {
conn.Close()
return nil, newError(s)
}
return newConnection(conn, conn.RemoteAddr(), nil), nil
}
header := wsSettings.GetRequestHeader() header := wsSettings.GetRequestHeader()
if ed != nil { if ed != nil {
header.Set("Sec-WebSocket-Protocol", base64.StdEncoding.EncodeToString(ed)) header.Set("Sec-WebSocket-Protocol", base64.StdEncoding.EncodeToString(ed))

55
transport/internet/websocket/dialer.html Normal file
View file

@ -0,0 +1,55 @@
<!DOCTYPE html>
<html>
<head>
<title>Browser Dialer</title>
</head>
<body></body>
<script>
// Copyright (c) 2021 XRAY. Mozilla Public License 2.0.
var url = "ws://" + window.location.host + "/websocket"
var count = 0
setInterval(check, 1000)
function check() {
if (count <= 0) {
count += 1
console.log("Prepare", url)
var ws = new WebSocket(url)
var wss = undefined
var first = true
ws.onmessage = function (event) {
if (first) {
first = false
count -= 1
var arr = event.data.split(" ")
console.log("Dial", arr[0], arr[1])
wss = new WebSocket(arr[0], arr[1])
var opened = false
wss.onopen = function (event) {
opened = true
ws.send("ok")
}
wss.onmessage = function (event) {
ws.send(event.data)
}
wss.onclose = function (event) {
ws.close()
}
wss.onerror = function (event) {
!opened && ws.send("fail")
wss.close()
}
check()
} else wss.send(event.data)
}
ws.onclose = function (event) {
if (first) count -= 1
else wss.close()
}
ws.onerror = function (event) {
ws.close()
}
}
}
</script>
</body>
</html>

23
transport/internet/websocket/hub.go
View file

@ -7,6 +7,7 @@ import (
"encoding/base64" "encoding/base64"
"io" "io"
"net/http" "net/http"
"strings"
"sync" "sync"
"time" "time"
@ -25,6 +26,8 @@ type requestHandler struct {
ln *Listener ln *Listener
} }
var replacer = strings.NewReplacer("+", "-", "/", "_", "=", "")
var upgrader = &websocket.Upgrader{ var upgrader = &websocket.Upgrader{
ReadBufferSize: 4 * 1024, ReadBufferSize: 4 * 1024,
WriteBufferSize: 4 * 1024, WriteBufferSize: 4 * 1024,
@ -39,7 +42,17 @@ func (h *requestHandler) ServeHTTP(writer http.ResponseWriter, request *http.Req
writer.WriteHeader(http.StatusNotFound) writer.WriteHeader(http.StatusNotFound)
return return
} }
conn, err := upgrader.Upgrade(writer, request, nil)
var extraReader io.Reader
var responseHeader = http.Header{}
if str := request.Header.Get("Sec-WebSocket-Protocol"); str != "" {
if ed, err := base64.RawURLEncoding.DecodeString(replacer.Replace(str)); err == nil && len(ed) > 0 {
extraReader = bytes.NewReader(ed)
responseHeader.Set("Sec-WebSocket-Protocol", str)
}
}
conn, err := upgrader.Upgrade(writer, request, responseHeader)
if err != nil { if err != nil {
newError("failed to convert to WebSocket connection").Base(err).WriteToLog() newError("failed to convert to WebSocket connection").Base(err).WriteToLog()
return return
@ -54,12 +67,6 @@ func (h *requestHandler) ServeHTTP(writer http.ResponseWriter, request *http.Req
} }
} }
var extraReader io.Reader
if str := request.Header.Get("Sec-WebSocket-Protocol"); str != "" {
if ed, err := base64.StdEncoding.DecodeString(str); err == nil && len(ed) > 0 {
extraReader = bytes.NewReader(ed)
}
}
h.ln.addConn(newConnection(conn, remoteAddr, extraReader)) h.ln.addConn(newConnection(conn, remoteAddr, extraReader))
} }
@ -128,7 +135,7 @@ func ListenWS(ctx context.Context, address net.Address, port net.Port, streamSet
ln: l, ln: l,
}, },
ReadHeaderTimeout: time.Second * 4, ReadHeaderTimeout: time.Second * 4,
MaxHeaderBytes: 2048, MaxHeaderBytes: 4096,
} }
go func() { go func() {