85 lines
1.4 KiB
Go
85 lines
1.4 KiB
Go
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package engineio
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import (
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"errors"
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"io"
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"net/http"
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"net/url"
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"github.com/googollee/go-socket.io/engineio/packet"
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"github.com/googollee/go-socket.io/engineio/transport"
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)
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// Dialer is dialer configure.
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type Dialer struct {
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Transports []transport.Transport
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}
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// Dial returns a connection which dials to url with requestHeader.
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func (d *Dialer) Dial(urlStr string, requestHeader http.Header) (Conn, error) {
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u, err := url.Parse(urlStr)
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if err != nil {
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return nil, err
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}
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query := u.Query()
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query.Set("EIO", "3")
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u.RawQuery = query.Encode()
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var conn transport.Conn
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for i := len(d.Transports) - 1; i >= 0; i-- {
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if conn != nil {
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conn.Close()
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}
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t := d.Transports[i]
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conn, err = t.Dial(u, requestHeader)
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if err != nil {
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continue
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}
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var params transport.ConnParameters
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if p, ok := conn.(Opener); ok {
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params, err = p.Open()
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if err != nil {
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continue
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}
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} else {
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var pt packet.Type
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var r io.ReadCloser
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_, pt, r, err = conn.NextReader()
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if err != nil {
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continue
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}
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func() {
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defer r.Close()
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if pt != packet.OPEN {
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err = errors.New("invalid open")
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return
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}
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params, err = transport.ReadConnParameters(r)
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if err != nil {
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return
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}
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}()
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}
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if err != nil {
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continue
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}
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ret := &client{
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conn: conn,
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params: params,
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transport: t.Name(),
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close: make(chan struct{}),
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}
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go ret.serve()
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return ret, nil
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}
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return nil, err
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}
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