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