mirror of
https://github.com/SagerNet/sing-box.git
synced 2024-11-12 20:03:38 +00:00
119 lines
3 KiB
Go
119 lines
3 KiB
Go
package v2rayhttpupgrade
|
|
|
|
import (
|
|
std_bufio "bufio"
|
|
"context"
|
|
"net"
|
|
"net/http"
|
|
"net/url"
|
|
"strings"
|
|
|
|
"github.com/sagernet/sing-box/adapter"
|
|
"github.com/sagernet/sing-box/common/tls"
|
|
"github.com/sagernet/sing-box/option"
|
|
"github.com/sagernet/sing/common/buf"
|
|
"github.com/sagernet/sing/common/bufio"
|
|
E "github.com/sagernet/sing/common/exceptions"
|
|
M "github.com/sagernet/sing/common/metadata"
|
|
N "github.com/sagernet/sing/common/network"
|
|
sHTTP "github.com/sagernet/sing/protocol/http"
|
|
)
|
|
|
|
var _ adapter.V2RayClientTransport = (*Client)(nil)
|
|
|
|
type Client struct {
|
|
dialer N.Dialer
|
|
tlsConfig tls.Config
|
|
serverAddr M.Socksaddr
|
|
requestURL url.URL
|
|
headers http.Header
|
|
host string
|
|
}
|
|
|
|
func NewClient(ctx context.Context, dialer N.Dialer, serverAddr M.Socksaddr, options option.V2RayHTTPUpgradeOptions, tlsConfig tls.Config) (*Client, error) {
|
|
if tlsConfig != nil {
|
|
if len(tlsConfig.NextProtos()) == 0 {
|
|
tlsConfig.SetNextProtos([]string{"http/1.1"})
|
|
}
|
|
}
|
|
var host string
|
|
if options.Host != "" {
|
|
host = options.Host
|
|
} else if tlsConfig != nil && tlsConfig.ServerName() != "" {
|
|
host = tlsConfig.ServerName()
|
|
} else {
|
|
host = serverAddr.String()
|
|
}
|
|
var requestURL url.URL
|
|
if tlsConfig == nil {
|
|
requestURL.Scheme = "http"
|
|
} else {
|
|
requestURL.Scheme = "https"
|
|
}
|
|
requestURL.Host = serverAddr.String()
|
|
requestURL.Path = options.Path
|
|
err := sHTTP.URLSetPath(&requestURL, options.Path)
|
|
if err != nil {
|
|
return nil, E.Cause(err, "parse path")
|
|
}
|
|
if !strings.HasPrefix(requestURL.Path, "/") {
|
|
requestURL.Path = "/" + requestURL.Path
|
|
}
|
|
headers := make(http.Header)
|
|
for key, value := range options.Headers {
|
|
headers[key] = value
|
|
}
|
|
return &Client{
|
|
dialer: dialer,
|
|
tlsConfig: tlsConfig,
|
|
serverAddr: serverAddr,
|
|
requestURL: requestURL,
|
|
headers: headers,
|
|
host: host,
|
|
}, nil
|
|
}
|
|
|
|
func (c *Client) DialContext(ctx context.Context) (net.Conn, error) {
|
|
conn, err := c.dialer.DialContext(ctx, N.NetworkTCP, c.serverAddr)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
if c.tlsConfig != nil {
|
|
conn, err = tls.ClientHandshake(ctx, conn, c.tlsConfig)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
}
|
|
request := &http.Request{
|
|
Method: http.MethodGet,
|
|
URL: &c.requestURL,
|
|
Header: c.headers.Clone(),
|
|
Host: c.host,
|
|
}
|
|
request.Header.Set("Connection", "Upgrade")
|
|
request.Header.Set("Upgrade", "websocket")
|
|
err = request.Write(conn)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
bufReader := std_bufio.NewReader(conn)
|
|
response, err := http.ReadResponse(bufReader, request)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
if response.StatusCode != 101 ||
|
|
!strings.EqualFold(response.Header.Get("Connection"), "upgrade") ||
|
|
!strings.EqualFold(response.Header.Get("Upgrade"), "websocket") {
|
|
return nil, E.New("unexpected status: ", response.Status)
|
|
}
|
|
if bufReader.Buffered() > 0 {
|
|
buffer := buf.NewSize(bufReader.Buffered())
|
|
_, err = buffer.ReadFullFrom(bufReader, buffer.Len())
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
conn = bufio.NewCachedConn(conn, buffer)
|
|
}
|
|
return conn, nil
|
|
}
|