improve ss

pkg/connector/http/connector.go

@@ -0,0 +1,116 @@
+package http
+
+import (
+	"bufio"
+	"context"
+	"encoding/base64"
+	"fmt"
+	"net"
+	"net/http"
+	"net/http/httputil"
+	"net/url"
+	"strings"
+
+	"github.com/go-gost/gost/pkg/connector"
+	"github.com/go-gost/gost/pkg/logger"
+	md "github.com/go-gost/gost/pkg/metadata"
+	"github.com/go-gost/gost/pkg/registry"
+)
+
+func init() {
+	registry.RegiserConnector("http", NewConnector)
+}
+
+type httpConnector struct {
+	md     metadata
+	logger logger.Logger
+}
+
+func NewConnector(opts ...connector.Option) connector.Connector {
+	options := &connector.Options{}
+	for _, opt := range opts {
+		opt(options)
+	}
+
+	return &httpConnector{
+		logger: options.Logger,
+	}
+}
+
+func (c *httpConnector) Init(md md.Metadata) (err error) {
+	return c.parseMetadata(md)
+}
+
+func (c *httpConnector) Connect(ctx context.Context, conn net.Conn, network, address string, opts ...connector.ConnectOption) (net.Conn, error) {
+	req := &http.Request{
+		Method:     http.MethodConnect,
+		URL:        &url.URL{Host: address},
+		Host:       address,
+		ProtoMajor: 1,
+		ProtoMinor: 1,
+		Header:     make(http.Header),
+	}
+	if c.md.UserAgent != "" {
+		req.Header.Set("User-Agent", c.md.UserAgent)
+	}
+	req.Header.Set("Proxy-Connection", "keep-alive")
+
+	c.logger = c.logger.WithFields(map[string]interface{}{
+		"local":  conn.LocalAddr().String(),
+		"remote": conn.RemoteAddr().String(),
+		"target": address,
+	})
+	c.logger.Infof("connect: ", address)
+
+	if user := c.md.User; user != nil {
+		u := user.Username()
+		p, _ := user.Password()
+		req.Header.Set("Proxy-Authorization",
+			"Basic "+base64.StdEncoding.EncodeToString([]byte(u+":"+p)))
+	}
+
+	if c.logger.IsLevelEnabled(logger.DebugLevel) {
+		dump, _ := httputil.DumpRequest(req, false)
+		c.logger.Debug(string(dump))
+	}
+
+	req = req.WithContext(ctx)
+	if err := req.Write(conn); err != nil {
+		return nil, err
+	}
+
+	resp, err := http.ReadResponse(bufio.NewReader(conn), req)
+	if err != nil {
+		return nil, err
+	}
+	defer resp.Body.Close()
+
+	if c.logger.IsLevelEnabled(logger.DebugLevel) {
+		dump, _ := httputil.DumpResponse(resp, false)
+		c.logger.Debug(string(dump))
+	}
+
+	if resp.StatusCode != http.StatusOK {
+		return nil, fmt.Errorf("%s", resp.Status)
+	}
+
+	return conn, nil
+}
+
+func (c *httpConnector) parseMetadata(md md.Metadata) (err error) {
+	c.md.UserAgent, _ = md.Get(userAgent).(string)
+	if c.md.UserAgent == "" {
+		c.md.UserAgent = defaultUserAgent
+	}
+
+	if v := md.GetString(auth); v != "" {
+		ss := strings.SplitN(v, ":", 2)
+		if len(ss) == 1 {
+			c.md.User = url.User(ss[0])
+		} else {
+			c.md.User = url.UserPassword(ss[0], ss[1])
+		}
+	}
+
+	return
+}