122 lines
2.5 KiB
Go
122 lines
2.5 KiB
Go
package main
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import (
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"bufio"
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"github.com/golang/glog"
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"golang.org/x/net/http2"
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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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)
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func init() {
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http2.VerboseLogs = true
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}
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func handlerHttp2Request(w http.ResponseWriter, req *http.Request) {
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glog.V(LINFO).Infof("[http2] %s - %s", req.RemoteAddr, req.Host)
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if glog.V(LDEBUG) {
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dump, err := httputil.DumpRequest(req, false)
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if err != nil {
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glog.Infoln(err)
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} else {
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glog.Infoln(string(dump))
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}
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}
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var c net.Conn
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var err error
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fw := flushWriter{w}
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c, err = Connect(req.Host)
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if err != nil {
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glog.V(LWARNING).Infof("[http2] %s -> %s : %s", req.RemoteAddr, req.Host, err)
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b := []byte("HTTP/1.1 503 Service unavailable\r\n" +
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"Proxy-Agent: gost/" + Version + "\r\n\r\n")
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glog.V(LDEBUG).Infof("[http2] %s <- %s\n%s", req.RemoteAddr, req.Host, string(b))
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//w.WriteHeader(http.StatusServiceUnavailable)
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fw.Write(b)
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return
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}
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defer c.Close()
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rChan := make(chan error, 1)
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wChan := make(chan error, 1)
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if req.Method == http.MethodConnect {
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w.Header().Set("Proxy-Agent", "gost/"+Version)
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w.WriteHeader(http.StatusOK)
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if fw, ok := w.(http.Flusher); ok {
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fw.Flush()
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}
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// compatible with HTTP 1.x
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if hj, ok := w.(http.Hijacker); ok && req.ProtoMajor == 1 {
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conn, _, err := hj.Hijack()
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if err != nil {
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glog.V(LWARNING).Infoln(err)
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return
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}
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defer conn.Close()
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go Pipe(conn, c, rChan)
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go Pipe(c, conn, wChan)
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} else {
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go Pipe(req.Body, c, rChan)
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go Pipe(c, fw, wChan)
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}
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select {
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case err := <-rChan:
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glog.V(LWARNING).Infoln("r exit", err)
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case err := <-wChan:
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glog.V(LWARNING).Infoln("w exit", err)
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}
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} else {
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req.Header.Set("Connection", "Keep-Alive")
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if err = req.Write(c); err != nil {
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glog.V(LWARNING).Infof("[http2] %s -> %s : %s", req.RemoteAddr, req.Host, err)
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return
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}
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resp, err := http.ReadResponse(bufio.NewReader(c), req)
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if err != nil {
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glog.V(LWARNING).Infoln(err)
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return
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}
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defer resp.Body.Close()
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for k, v := range resp.Header {
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for _, vv := range v {
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w.Header().Add(k, vv)
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}
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}
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w.WriteHeader(resp.StatusCode)
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if _, err := io.Copy(fw, resp.Body); err != nil {
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glog.V(LWARNING).Infoln(err)
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}
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}
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//glog.V(LINFO).Infof("[http2] %s <-> %s", req.RemoteAddr, req.Host)
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//glog.V(LINFO).Infof("[http2] %s >-< %s", req.RemoteAddr, req.Host)
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}
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type flushWriter struct {
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w io.Writer
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}
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func (fw flushWriter) Write(p []byte) (n int, err error) {
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n, err = fw.w.Write(p)
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if f, ok := fw.w.(http.Flusher); ok {
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f.Flush()
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}
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return
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}
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