130 lines
3.0 KiB
Go
130 lines
3.0 KiB
Go
package http
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import (
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"bufio"
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"context"
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"encoding/base64"
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"fmt"
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"net"
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"net/http"
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"net/http/httputil"
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"net/url"
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"time"
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"github.com/go-gost/gost/v3/pkg/connector"
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"github.com/go-gost/gost/v3/pkg/internal/util/socks"
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"github.com/go-gost/gost/v3/pkg/logger"
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md "github.com/go-gost/gost/v3/pkg/metadata"
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"github.com/go-gost/gost/v3/pkg/registry"
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)
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func init() {
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registry.ConnectorRegistry().Register("http", NewConnector)
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}
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type httpConnector struct {
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md metadata
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options connector.Options
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}
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func NewConnector(opts ...connector.Option) connector.Connector {
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options := connector.Options{}
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for _, opt := range opts {
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opt(&options)
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}
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return &httpConnector{
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options: options,
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}
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}
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func (c *httpConnector) Init(md md.Metadata) (err error) {
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return c.parseMetadata(md)
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}
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func (c *httpConnector) Connect(ctx context.Context, conn net.Conn, network, address string, opts ...connector.ConnectOption) (net.Conn, error) {
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log := c.options.Logger.WithFields(map[string]any{
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"local": conn.LocalAddr().String(),
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"remote": conn.RemoteAddr().String(),
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"network": network,
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"address": address,
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})
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log.Infof("connect %s/%s", address, network)
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req := &http.Request{
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Method: http.MethodConnect,
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URL: &url.URL{Host: address},
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Host: address,
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ProtoMajor: 1,
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ProtoMinor: 1,
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Header: c.md.header,
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}
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if req.Header == nil {
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req.Header = http.Header{}
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}
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req.Header.Set("Proxy-Connection", "keep-alive")
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if user := c.options.Auth; user != nil {
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u := user.Username()
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p, _ := user.Password()
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req.Header.Set("Proxy-Authorization",
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"Basic "+base64.StdEncoding.EncodeToString([]byte(u+":"+p)))
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}
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switch network {
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case "tcp", "tcp4", "tcp6":
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if _, ok := conn.(net.PacketConn); ok {
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err := fmt.Errorf("tcp over udp is unsupported")
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log.Error(err)
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return nil, err
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}
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case "udp", "udp4", "udp6":
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req.Header.Set("X-Gost-Protocol", "udp")
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default:
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err := fmt.Errorf("network %s is unsupported", network)
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log.Error(err)
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return nil, err
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}
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if log.IsLevelEnabled(logger.DebugLevel) {
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dump, _ := httputil.DumpRequest(req, false)
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log.Debug(string(dump))
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}
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if c.md.connectTimeout > 0 {
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conn.SetDeadline(time.Now().Add(c.md.connectTimeout))
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defer conn.SetDeadline(time.Time{})
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}
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req = req.WithContext(ctx)
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if err := req.Write(conn); err != nil {
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return nil, err
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}
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resp, err := http.ReadResponse(bufio.NewReader(conn), req)
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if err != nil {
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return nil, err
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}
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// NOTE: the server may return `Transfer-Encoding: chunked` header,
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// then the Content-Length of response will be unknown (-1),
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// in this case, close body will be blocked, so we leave it untouched.
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// defer resp.Body.Close()
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if log.IsLevelEnabled(logger.DebugLevel) {
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dump, _ := httputil.DumpResponse(resp, false)
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log.Debug(string(dump))
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}
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if resp.StatusCode != http.StatusOK {
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return nil, fmt.Errorf("%s", resp.Status)
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}
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if network == "udp" {
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addr, _ := net.ResolveUDPAddr(network, address)
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return socks.UDPTunClientConn(conn, addr), nil
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}
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return conn, nil
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}
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