mirror of
https://github.com/v2fly/v2ray-core.git
synced 2024-12-22 18:17:52 -05:00
284 lines
7.3 KiB
Go
284 lines
7.3 KiB
Go
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/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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// Server is a HTTP proxy server.
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type Server 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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meta *proxy.InboundHandlerMeta
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}
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func NewServer(config *Config, packetDispatcher dispatcher.PacketDispatcher, meta *proxy.InboundHandlerMeta) *Server {
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return &Server{
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packetDispatcher: packetDispatcher,
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config: config,
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meta: meta,
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}
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}
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func (this *Server) Port() v2net.Port {
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return this.meta.Port
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}
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func (this *Server) 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 *Server) Start() error {
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if this.accepting {
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return nil
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}
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var tlsConfig *tls.Config
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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(this.meta.Address, this.meta.Port, this.handleConnection, tlsConfig)
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if err != nil {
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log.Error("HTTP: Failed listen on ", this.meta.Address, ":", this.meta.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 *Server) 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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if err != io.EOF {
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log.Warning("HTTP: Failed to read http request: ", err)
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}
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return
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}
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log.Info("HTTP: 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("HTTP: Malformed proxy host (", host, "): ", err)
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return
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}
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log.Access(conn.RemoteAddr(), request.URL, log.AccessAccepted, "")
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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 *Server) 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 *Server) 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 *Server) GenerateResponse(statusCode int, status string) *http.Response {
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hdr := http.Header(make(map[string][]string))
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hdr.Set("Connection", "close")
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return &http.Response{
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Status: status,
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StatusCode: statusCode,
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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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}
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func (this *Server) 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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response := this.GenerateResponse(400, "Bad Request")
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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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ray := this.packetDispatcher.DispatchToOutbound(dest)
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defer ray.InboundInput().Close()
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defer ray.InboundOutput().Release()
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var finish sync.WaitGroup
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finish.Add(1)
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go func() {
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defer finish.Done()
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requestWriter := v2io.NewBufferedWriter(v2io.NewChainWriter(ray.InboundInput()))
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err := request.Write(requestWriter)
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if err != nil {
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log.Warning("HTTP: Failed to write request: ", err)
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return
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}
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requestWriter.Flush()
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}()
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finish.Add(1)
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go func() {
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defer finish.Done()
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responseReader := bufio.NewReader(v2io.NewChanReader(ray.InboundOutput()))
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response, err := http.ReadResponse(responseReader, request)
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if err != nil {
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log.Warning("HTTP: Failed to read response: ", err)
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response = this.GenerateResponse(503, "Service Unavailable")
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}
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responseWriter := v2io.NewBufferedWriter(writer)
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err = response.Write(responseWriter)
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if err != nil {
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log.Warning("HTTP: Failed to write response: ", err)
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return
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}
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responseWriter.Flush()
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}()
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finish.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{}, meta *proxy.InboundHandlerMeta) (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 NewServer(
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rawConfig.(*Config),
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space.GetApp(dispatcher.APP_ID).(dispatcher.PacketDispatcher),
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meta), nil
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})
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}
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