64 lines
1.6 KiB
Go
64 lines
1.6 KiB
Go
package netutil
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import (
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"bufio"
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"fmt"
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errlog "mal/pkg"
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"net"
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"net/http"
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"time"
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utls "github.com/refraction-networking/utls"
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"golang.org/x/net/http2"
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)
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// UtlsRoundTripper uses uTLS + HTTP/2 to mimic Firefox and bypass Cloudflare JA3 detection
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type UtlsRoundTripper struct{}
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func (rt *UtlsRoundTripper) RoundTrip(req *http.Request) (*http.Response, error) {
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dialer := &net.Dialer{Timeout: 10 * time.Second}
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host := req.URL.Hostname()
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port := req.URL.Port()
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if port == "" {
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if req.URL.Scheme == "https" {
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port = "443"
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} else {
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port = "80"
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}
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}
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addr := net.JoinHostPort(host, port)
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rawConn, err := dialer.DialContext(req.Context(), "tcp", addr)
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if err != nil {
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return nil, fmt.Errorf("tcp dial: %w", err)
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}
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uconn := utls.UClient(rawConn, &utls.Config{
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ServerName: host,
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NextProtos: []string{"h2", "http/1.1"},
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}, utls.HelloFirefox_120)
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if err := uconn.HandshakeContext(req.Context()); err != nil {
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errlog.Close(uconn, "failed to close utls connection after handshake error")
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return nil, fmt.Errorf("utls handshake: %w", err)
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}
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alpn := uconn.ConnectionState().NegotiatedProtocol
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if alpn == "h2" {
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t := &http2.Transport{}
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cc, err := t.NewClientConn(uconn)
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if err != nil {
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errlog.Close(uconn, "failed to close utls connection after http2 setup error")
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return nil, fmt.Errorf("http2 client conn: %w", err)
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}
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return cc.RoundTrip(req)
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}
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// Fallback to HTTP/1.1
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if err := req.Write(uconn); err != nil {
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errlog.Close(uconn, "failed to close utls connection after http1 write error")
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return nil, fmt.Errorf("http1 write: %w", err)
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}
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return http.ReadResponse(bufio.NewReader(uconn), req)
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}
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