95 lines
1.9 KiB
Go
95 lines
1.9 KiB
Go
package http
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import (
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"context"
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"crypto/tls"
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"net"
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"net/http"
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"strings"
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"time"
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"github.com/Dreamacro/clash/adapter/inbound"
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N "github.com/Dreamacro/clash/common/net"
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C "github.com/Dreamacro/clash/constant"
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"github.com/Dreamacro/clash/transport/socks5"
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)
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func isUpgradeRequest(req *http.Request) bool {
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return strings.EqualFold(req.Header.Get("Connection"), "Upgrade")
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}
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func handleUpgrade(localConn net.Conn, source net.Addr, request *http.Request, in chan<- C.ConnContext) (resp *http.Response) {
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removeProxyHeaders(request.Header)
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removeExtraHTTPHostPort(request)
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address := request.Host
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if _, _, err := net.SplitHostPort(address); err != nil {
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port := "80"
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if request.TLS != nil {
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port = "443"
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}
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address = net.JoinHostPort(address, port)
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}
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dstAddr := socks5.ParseAddr(address)
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if dstAddr == nil {
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return
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}
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left, right := net.Pipe()
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in <- inbound.NewHTTP(dstAddr, source, right)
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var remoteServer *N.BufferedConn
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if request.TLS != nil {
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tlsConn := tls.Client(left, &tls.Config{
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ServerName: request.URL.Hostname(),
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})
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ctx, cancel := context.WithTimeout(context.Background(), C.DefaultTLSTimeout)
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defer cancel()
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if tlsConn.HandshakeContext(ctx) != nil {
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_ = localConn.Close()
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_ = left.Close()
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return
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}
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remoteServer = N.NewBufferedConn(tlsConn)
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} else {
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remoteServer = N.NewBufferedConn(left)
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}
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defer func() {
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_ = remoteServer.Close()
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}()
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err := request.Write(remoteServer)
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if err != nil {
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_ = localConn.Close()
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return
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}
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resp, err = http.ReadResponse(remoteServer.Reader(), request)
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if err != nil {
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_ = localConn.Close()
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return
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}
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if resp.StatusCode == http.StatusSwitchingProtocols {
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removeProxyHeaders(resp.Header)
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err = localConn.SetReadDeadline(time.Time{}) // set to not time out
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if err != nil {
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return
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}
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err = resp.Write(localConn)
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if err != nil {
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return
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}
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N.Relay(remoteServer, localConn) // blocking here
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_ = localConn.Close()
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resp = nil
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}
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return
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}
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