mirror of https://github.com/Dreamacro/clash.git
110 lines
1.9 KiB
Go
110 lines
1.9 KiB
Go
package vmess
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import (
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"io"
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"math/rand"
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"net"
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"net/http"
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"net/url"
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"golang.org/x/net/http2"
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)
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type h2Conn struct {
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net.Conn
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*http2.ClientConn
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pwriter *io.PipeWriter
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res *http.Response
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cfg *H2Config
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}
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type H2Config struct {
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Hosts []string
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Path string
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}
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func (hc *h2Conn) establishConn() error {
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preader, pwriter := io.Pipe()
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host := hc.cfg.Hosts[rand.Intn(len(hc.cfg.Hosts))]
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path := hc.cfg.Path
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// TODO: connect use VMess Host instead of H2 Host
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req := http.Request{
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Method: http.MethodPut,
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Host: host,
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URL: &url.URL{
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Scheme: "https",
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Host: host,
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Path: path,
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},
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Proto: "HTTP/2",
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ProtoMajor: 2,
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ProtoMinor: 0,
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Body: preader,
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Header: map[string][]string{
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"Accept-Encoding": {"identity"},
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},
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}
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// it will be close at : `func (hc *h2Conn) Close() error`
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res, err := hc.ClientConn.RoundTrip(&req)
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if err != nil {
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return err
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}
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hc.pwriter = pwriter
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hc.res = res
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return nil
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}
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// Read implements net.Conn.Read()
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func (hc *h2Conn) Read(b []byte) (int, error) {
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if hc.res != nil && !hc.res.Close {
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n, err := hc.res.Body.Read(b)
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return n, err
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}
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if err := hc.establishConn(); err != nil {
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return 0, err
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}
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return hc.res.Body.Read(b)
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}
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// Write implements io.Writer.
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func (hc *h2Conn) Write(b []byte) (int, error) {
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if hc.pwriter != nil {
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return hc.pwriter.Write(b)
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}
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if err := hc.establishConn(); err != nil {
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return 0, err
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}
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return hc.pwriter.Write(b)
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}
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func (hc *h2Conn) Close() error {
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if err := hc.pwriter.Close(); err != nil {
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return err
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}
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if err := hc.ClientConn.Shutdown(hc.res.Request.Context()); err != nil {
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return err
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}
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return hc.Conn.Close()
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}
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func StreamH2Conn(conn net.Conn, cfg *H2Config) (net.Conn, error) {
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transport := &http2.Transport{}
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cconn, err := transport.NewClientConn(conn)
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if err != nil {
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return nil, err
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}
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return &h2Conn{
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Conn: conn,
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ClientConn: cconn,
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cfg: cfg,
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}, nil
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}
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