clash/component/vmess/http.go

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package vmess
import (
"bytes"
"fmt"
"math/rand"
"net"
"net/http"
"net/textproto"
)
type httpConn struct {
net.Conn
cfg *HTTPConfig
rhandshake bool
whandshake bool
}
type HTTPConfig struct {
Method string
Host string
Path []string
Headers map[string][]string
}
// Read implements net.Conn.Read()
func (hc *httpConn) Read(b []byte) (int, error) {
if hc.rhandshake {
n, err := hc.Conn.Read(b)
return n, err
}
reader := textproto.NewConn(hc.Conn)
// First line: GET /index.html HTTP/1.0
if _, err := reader.ReadLine(); err != nil {
return 0, err
}
if _, err := reader.ReadMIMEHeader(); err != nil {
return 0, err
}
hc.rhandshake = true
return hc.Conn.Read(b)
}
// Write implements io.Writer.
func (hc *httpConn) Write(b []byte) (int, error) {
if hc.whandshake {
return hc.Conn.Write(b)
}
path := hc.cfg.Path[rand.Intn(len(hc.cfg.Path))]
u := fmt.Sprintf("http://%s%s", hc.cfg.Host, path)
req, _ := http.NewRequest("GET", u, bytes.NewBuffer(b))
for key, list := range hc.cfg.Headers {
req.Header.Set(key, list[rand.Intn(len(list))])
}
req.ContentLength = int64(len(b))
if err := req.Write(hc.Conn); err != nil {
return 0, err
}
hc.whandshake = true
return len(b), nil
}
func (hc *httpConn) Close() error {
return hc.Conn.Close()
}
func StreamHTTPConn(conn net.Conn, cfg *HTTPConfig) net.Conn {
return &httpConn{
Conn: conn,
cfg: cfg,
}
}