89 lines
1.8 KiB
Go
89 lines
1.8 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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"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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for _, header := range req.Header["Connection"] {
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for _, elm := range strings.Split(header, ",") {
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if strings.EqualFold(strings.TrimSpace(elm), "Upgrade") {
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return true
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}
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}
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}
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return false
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}
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func handleUpgrade(conn net.Conn, request *http.Request, tunnel C.Tunnel, additions ...inbound.Addition) {
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defer conn.Close()
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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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address = net.JoinHostPort(address, "80")
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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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go tunnel.HandleTCPConn(inbound.NewHTTP(dstAddr, conn.RemoteAddr(), right, additions...))
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var bufferedLeft *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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_ = left.Close()
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return
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}
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bufferedLeft = N.NewBufferedConn(tlsConn)
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} else {
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bufferedLeft = N.NewBufferedConn(left)
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}
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defer func() {
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_ = bufferedLeft.Close()
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}()
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err := request.Write(bufferedLeft)
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if err != nil {
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return
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}
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resp, err := http.ReadResponse(bufferedLeft.Reader(), request)
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if err != nil {
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return
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}
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removeProxyHeaders(resp.Header)
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err = resp.Write(conn)
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if err != nil {
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return
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}
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if resp.StatusCode == http.StatusSwitchingProtocols {
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N.Relay(bufferedLeft, conn)
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}
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}
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