115 lines
2.4 KiB
Go
115 lines
2.4 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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"strings"
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"github.com/go-gost/gost/pkg/components/connector"
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md "github.com/go-gost/gost/pkg/components/metadata"
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"github.com/go-gost/gost/pkg/logger"
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"github.com/go-gost/gost/pkg/registry"
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)
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func init() {
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registry.RegiserConnector("http", NewConnector)
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}
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type httpConnector struct {
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md metadata
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logger logger.Logger
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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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logger: options.Logger,
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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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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: make(http.Header),
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}
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if c.md.UserAgent != "" {
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req.Header.Set("User-Agent", c.md.UserAgent)
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}
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req.Header.Set("Proxy-Connection", "keep-alive")
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c.logger = c.logger.WithFields(map[string]interface{}{
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"src": conn.LocalAddr().String(),
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"dst": conn.RemoteAddr().String(),
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})
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if user := c.md.User; 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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if c.logger.IsLevelEnabled(logger.DebugLevel) {
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dump, _ := httputil.DumpRequest(req, false)
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c.logger.Debug(string(dump))
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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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defer resp.Body.Close()
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if c.logger.IsLevelEnabled(logger.DebugLevel) {
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dump, _ := httputil.DumpResponse(resp, false)
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c.logger.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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return conn, nil
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}
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func (c *httpConnector) parseMetadata(md md.Metadata) (err error) {
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c.md.UserAgent, _ = md.Get(userAgent).(string)
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if c.md.UserAgent == "" {
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c.md.UserAgent = defaultUserAgent
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}
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if v := md.GetString(auth); v != "" {
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ss := strings.SplitN(v, ":", 2)
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if len(ss) == 1 {
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c.md.User = url.User(ss[0])
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} else {
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c.md.User = url.UserPassword(ss[0], ss[1])
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}
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}
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return
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}
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