mirror of
https://github.com/v2fly/v2ray-core.git
synced 2026-08-13 18:40:59 -04:00
http client
This commit is contained in:
v2ray
@@ -0,0 +1,268 @@
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package http
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import (
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"bufio"
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"crypto/tls"
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"io"
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"net"
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"net/http"
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"strconv"
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"strings"
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"sync"
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"github.com/v2ray/v2ray-core/app"
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"github.com/v2ray/v2ray-core/app/dispatcher"
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"github.com/v2ray/v2ray-core/common/alloc"
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v2io "github.com/v2ray/v2ray-core/common/io"
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"github.com/v2ray/v2ray-core/common/log"
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v2net "github.com/v2ray/v2ray-core/common/net"
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"github.com/v2ray/v2ray-core/common/serial"
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"github.com/v2ray/v2ray-core/proxy"
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"github.com/v2ray/v2ray-core/proxy/internal"
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"github.com/v2ray/v2ray-core/transport/hub"
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"github.com/v2ray/v2ray-core/transport/ray"
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)
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type HttpProxyServer struct {
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sync.Mutex
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accepting bool
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packetDispatcher dispatcher.PacketDispatcher
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config *Config
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tcpListener *hub.TCPHub
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listeningPort v2net.Port
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}
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func NewHttpProxyServer(config *Config, packetDispatcher dispatcher.PacketDispatcher) *HttpProxyServer {
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return &HttpProxyServer{
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packetDispatcher: packetDispatcher,
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config: config,
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}
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}
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func (this *HttpProxyServer) Port() v2net.Port {
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return this.listeningPort
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}
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func (this *HttpProxyServer) Close() {
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this.accepting = false
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if this.tcpListener != nil {
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this.Lock()
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this.tcpListener.Close()
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this.tcpListener = nil
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this.Unlock()
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}
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}
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func (this *HttpProxyServer) Listen(port v2net.Port) error {
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if this.accepting {
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if this.listeningPort == port {
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return nil
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} else {
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return proxy.ErrorAlreadyListening
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}
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}
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this.listeningPort = port
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var tlsConfig *tls.Config = nil
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if this.config.TlsConfig != nil {
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tlsConfig = this.config.TlsConfig.GetConfig()
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}
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tcpListener, err := hub.ListenTCP(port, this.handleConnection, tlsConfig)
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if err != nil {
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log.Error("Http: Failed listen on port ", port, ": ", err)
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return err
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}
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this.Lock()
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this.tcpListener = tcpListener
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this.Unlock()
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this.accepting = true
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return nil
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}
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func parseHost(rawHost string, defaultPort v2net.Port) (v2net.Destination, error) {
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port := defaultPort
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host, rawPort, err := net.SplitHostPort(rawHost)
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if err != nil {
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if addrError, ok := err.(*net.AddrError); ok && strings.Contains(addrError.Err, "missing port") {
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host = rawHost
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} else {
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return nil, err
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}
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} else {
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intPort, err := strconv.Atoi(rawPort)
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if err != nil {
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return nil, err
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}
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port = v2net.Port(intPort)
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}
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if ip := net.ParseIP(host); ip != nil {
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return v2net.TCPDestination(v2net.IPAddress(ip), port), nil
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}
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return v2net.TCPDestination(v2net.DomainAddress(host), port), nil
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}
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func (this *HttpProxyServer) handleConnection(conn *hub.Connection) {
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defer conn.Close()
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reader := bufio.NewReader(conn)
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request, err := http.ReadRequest(reader)
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if err != nil {
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log.Warning("Failed to read http request: ", err)
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return
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}
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log.Info("Request to Method [", request.Method, "] Host [", request.Host, "] with URL [", request.URL, "]")
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defaultPort := v2net.Port(80)
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if strings.ToLower(request.URL.Scheme) == "https" {
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defaultPort = v2net.Port(443)
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}
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host := request.Host
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if len(host) == 0 {
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host = request.URL.Host
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}
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dest, err := parseHost(host, defaultPort)
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if err != nil {
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log.Warning("Malformed proxy host (", host, "): ", err)
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return
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}
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if strings.ToUpper(request.Method) == "CONNECT" {
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this.handleConnect(request, dest, reader, conn)
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} else {
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this.handlePlainHTTP(request, dest, reader, conn)
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}
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}
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func (this *HttpProxyServer) handleConnect(request *http.Request, destination v2net.Destination, reader io.Reader, writer io.Writer) {
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response := &http.Response{
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Status: "200 OK",
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StatusCode: 200,
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Proto: "HTTP/1.1",
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ProtoMajor: 1,
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ProtoMinor: 1,
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Header: http.Header(make(map[string][]string)),
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Body: nil,
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ContentLength: 0,
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Close: false,
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}
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buffer := alloc.NewSmallBuffer().Clear()
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response.Write(buffer)
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writer.Write(buffer.Value)
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buffer.Release()
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ray := this.packetDispatcher.DispatchToOutbound(destination)
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this.transport(reader, writer, ray)
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}
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func (this *HttpProxyServer) transport(input io.Reader, output io.Writer, ray ray.InboundRay) {
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var wg sync.WaitGroup
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wg.Add(2)
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defer wg.Wait()
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go func() {
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v2reader := v2io.NewAdaptiveReader(input)
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defer v2reader.Release()
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v2io.Pipe(v2reader, ray.InboundInput())
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ray.InboundInput().Close()
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wg.Done()
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}()
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go func() {
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v2writer := v2io.NewAdaptiveWriter(output)
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defer v2writer.Release()
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v2io.Pipe(ray.InboundOutput(), v2writer)
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ray.InboundOutput().Release()
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wg.Done()
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}()
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}
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// @VisibleForTesting
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func StripHopByHopHeaders(request *http.Request) {
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// Strip hop-by-hop header basaed on RFC:
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// http://www.w3.org/Protocols/rfc2616/rfc2616-sec13.html#sec13.5.1
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// https://www.mnot.net/blog/2011/07/11/what_proxies_must_do
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request.Header.Del("Proxy-Connection")
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request.Header.Del("Proxy-Authenticate")
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request.Header.Del("Proxy-Authorization")
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request.Header.Del("TE")
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request.Header.Del("Trailers")
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request.Header.Del("Transfer-Encoding")
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request.Header.Del("Upgrade")
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// TODO: support keep-alive
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connections := request.Header.Get("Connection")
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request.Header.Set("Connection", "close")
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if len(connections) == 0 {
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return
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}
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for _, h := range strings.Split(connections, ",") {
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request.Header.Del(strings.TrimSpace(h))
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}
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}
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func (this *HttpProxyServer) handlePlainHTTP(request *http.Request, dest v2net.Destination, reader *bufio.Reader, writer io.Writer) {
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if len(request.URL.Host) <= 0 {
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hdr := http.Header(make(map[string][]string))
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hdr.Set("Connection", "close")
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response := &http.Response{
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Status: "400 Bad Request",
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StatusCode: 400,
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Proto: "HTTP/1.1",
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ProtoMajor: 1,
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ProtoMinor: 1,
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Header: hdr,
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Body: nil,
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ContentLength: 0,
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Close: false,
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}
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buffer := alloc.NewSmallBuffer().Clear()
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response.Write(buffer)
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writer.Write(buffer.Value)
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buffer.Release()
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return
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}
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request.Host = request.URL.Host
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StripHopByHopHeaders(request)
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requestBuffer := alloc.NewBuffer().Clear() // Don't release this buffer as it is passed into a Packet.
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request.Write(requestBuffer)
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log.Debug("Request to remote:\n", serial.BytesLiteral(requestBuffer.Value))
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ray := this.packetDispatcher.DispatchToOutbound(dest)
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ray.InboundInput().Write(requestBuffer)
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defer ray.InboundInput().Close()
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var wg sync.WaitGroup
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wg.Add(1)
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go func() {
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defer wg.Done()
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responseReader := bufio.NewReader(NewChanReader(ray.InboundOutput()))
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response, err := http.ReadResponse(responseReader, request)
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if err != nil {
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return
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}
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responseBuffer := alloc.NewBuffer().Clear()
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defer responseBuffer.Release()
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response.Write(responseBuffer)
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writer.Write(responseBuffer.Value)
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response.Body.Close()
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}()
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wg.Wait()
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}
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func init() {
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internal.MustRegisterInboundHandlerCreator("http",
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func(space app.Space, rawConfig interface{}) (proxy.InboundHandler, error) {
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if !space.HasApp(dispatcher.APP_ID) {
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return nil, internal.ErrorBadConfiguration
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}
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return NewHttpProxyServer(
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rawConfig.(*Config),
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space.GetApp(dispatcher.APP_ID).(dispatcher.PacketDispatcher)), nil
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})
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}
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