fix: http forwarding stuck

session/handler.go

@@ -11,7 +11,6 @@ import (
 	"log"
 	"net"
 	"strconv"
-	"strings"
 	"sync"
 	"time"
 	portUtil "tunnel_pls/internal/port"
@@ -37,71 +36,6 @@ var (
 	Clients      = make(map[string]*SSHSession)
 )
 
-type HeaderModifier struct {
-	r          io.Reader
-	headerBuf  []byte
-	headerDone bool
-	state      int
-}
-
-func (hm *HeaderModifier) Read(p []byte) (int, error) {
-	n, err := hm.r.Read(p)
-	if n > 0 && !hm.headerDone {
-		for i := 0; i < n; i++ {
-			b := p[i]
-			hm.headerBuf = append(hm.headerBuf, b)
-
-			switch hm.state {
-			case 0:
-				if b == '\r' {
-					hm.state = 1
-				}
-			case 1:
-				if b == '\n' {
-					hm.state = 2
-				} else {
-					hm.state = 0
-				}
-			case 2:
-				if b == '\r' {
-					hm.state = 3
-				} else {
-					hm.state = 0
-				}
-			case 3:
-				if b == '\n' {
-					hm.headerDone = true
-					modifiedHeader := hm.modifyHeader(hm.headerBuf)
-					copy(p, modifiedHeader)
-					return len(modifiedHeader), nil
-				} else {
-					hm.state = 0
-				}
-			}
-		}
-	}
-
-	return n, err
-}
-func (hm *HeaderModifier) modifyHeader(header []byte) []byte {
-	lines := strings.Split(string(header), "\r\n")
-	found := false
-
-	for i, line := range lines {
-		if strings.HasPrefix(strings.ToLower(line), "server:") {
-			lines[i] = "Server: tunnel_please"
-			found = true
-		}
-	}
-
-	if !found {
-		lines = append(lines[:len(lines)-2], "Server: tunnel_please", "", "")
-	}
-
-	modified := strings.Join(lines, "\r\n")
-	return []byte(modified)
-}
-
 func registerClient(slug string, session *SSHSession) bool {
 	clientsMutex.Lock()
 	defer clientsMutex.Unlock()
@@ -586,12 +520,7 @@ func (s *SSHSession) HandleForwardedConnection(conn UserConnection, sshConn *ssh
 
 	s.interaction.SendMessage(fmt.Sprintf("\033[32m%s -> [%s] TUNNEL ADDRESS -- \"%s\"\033[0m\r\n", conn.Writer.RemoteAddr().String(), s.forwarder.TunnelType, timestamp))
 
-	if s.forwarder.GetTunnelType() == HTTP {
+	_, err = io.Copy(conn.Writer, reader)
-		ir := &HeaderModifier{r: reader}
-		_, err = io.Copy(conn.Writer, ir)
-	} else {
-		_, err = io.Copy(conn.Writer, reader)
-	}
 
 	if err != nil && !errors.Is(err, io.EOF) {
 		log.Printf("Error copying from channel to conn.Writer: %v", err)