133 lines
2.9 KiB
Go
133 lines
2.9 KiB
Go
package http
|
|
|
|
import (
|
|
"bufio"
|
|
"context"
|
|
"encoding/base64"
|
|
"fmt"
|
|
"net"
|
|
"net/http"
|
|
"net/http/httputil"
|
|
"net/url"
|
|
"strings"
|
|
"time"
|
|
|
|
"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) {
|
|
c.logger = c.logger.WithFields(map[string]interface{}{
|
|
"local": conn.LocalAddr().String(),
|
|
"remote": conn.RemoteAddr().String(),
|
|
"network": network,
|
|
"address": address,
|
|
})
|
|
c.logger.Infof("connect: %s/%s", address, network)
|
|
|
|
switch network {
|
|
case "tcp", "tcp4", "tcp6":
|
|
default:
|
|
err := fmt.Errorf("network %s unsupported, should be tcp, tcp4 or tcp6", network)
|
|
c.logger.Error(err)
|
|
return nil, err
|
|
}
|
|
|
|
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")
|
|
|
|
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))
|
|
}
|
|
|
|
if c.md.connectTimeout > 0 {
|
|
conn.SetDeadline(time.Now().Add(c.md.connectTimeout))
|
|
defer conn.SetDeadline(time.Time{})
|
|
}
|
|
|
|
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.connectTimeout = md.GetDuration(connectTimeout)
|
|
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
|
|
}
|