113 lines
2.4 KiB
Go
113 lines
2.4 KiB
Go
package ws
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import (
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"context"
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"net"
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"net/url"
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"time"
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"github.com/go-gost/gost/pkg/dialer"
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ws_util "github.com/go-gost/gost/pkg/internal/util/ws"
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"github.com/go-gost/gost/pkg/logger"
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md "github.com/go-gost/gost/pkg/metadata"
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"github.com/go-gost/gost/pkg/registry"
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"github.com/gorilla/websocket"
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)
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func init() {
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registry.DialerRegistry().Register("ws", NewDialer)
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registry.DialerRegistry().Register("wss", NewTLSDialer)
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}
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type wsDialer struct {
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tlsEnabled bool
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logger logger.Logger
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md metadata
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options dialer.Options
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}
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func NewDialer(opts ...dialer.Option) dialer.Dialer {
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options := dialer.Options{}
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for _, opt := range opts {
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opt(&options)
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}
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return &wsDialer{
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logger: options.Logger,
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options: options,
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}
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}
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func NewTLSDialer(opts ...dialer.Option) dialer.Dialer {
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options := dialer.Options{}
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for _, opt := range opts {
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opt(&options)
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}
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return &wsDialer{
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tlsEnabled: true,
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logger: options.Logger,
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options: options,
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}
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}
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func (d *wsDialer) Init(md md.Metadata) (err error) {
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return d.parseMetadata(md)
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}
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func (d *wsDialer) Dial(ctx context.Context, addr string, opts ...dialer.DialOption) (net.Conn, error) {
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var options dialer.DialOptions
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for _, opt := range opts {
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opt(&options)
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}
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var netd net.Dialer
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conn, err := netd.DialContext(ctx, "tcp", addr)
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if err != nil {
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d.logger.Error(err)
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}
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return conn, err
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}
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// Handshake implements dialer.Handshaker
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func (d *wsDialer) Handshake(ctx context.Context, conn net.Conn, options ...dialer.HandshakeOption) (net.Conn, error) {
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opts := &dialer.HandshakeOptions{}
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for _, option := range options {
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option(opts)
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}
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if d.md.handshakeTimeout > 0 {
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conn.SetDeadline(time.Now().Add(d.md.handshakeTimeout))
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defer conn.SetDeadline(time.Time{})
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}
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host := d.md.host
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if host == "" {
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host = opts.Addr
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}
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dialer := websocket.Dialer{
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HandshakeTimeout: d.md.handshakeTimeout,
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ReadBufferSize: d.md.readBufferSize,
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WriteBufferSize: d.md.writeBufferSize,
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EnableCompression: d.md.enableCompression,
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NetDial: func(net, addr string) (net.Conn, error) {
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return conn, nil
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},
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}
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url := url.URL{Scheme: "ws", Host: host, Path: d.md.path}
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if d.tlsEnabled {
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url.Scheme = "wss"
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dialer.TLSClientConfig = d.options.TLSConfig
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}
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c, resp, err := dialer.Dial(url.String(), d.md.header)
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if err != nil {
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return nil, err
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}
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resp.Body.Close()
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return ws_util.Conn(c), nil
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}
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