mirror of https://github.com/gorilla/websocket.git
Add support for custom TLS implementations
Add the new optional field DialTLS to the Dialer. If it is set, it will be used for TLS connection setup instead of net.Dial and tls.Client.
This commit is contained in:
Renato Aguiar
parent
80c2d40e9b
commit
cde7c32826
161
client.go
161
client.go
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@ -57,6 +57,11 @@ type Dialer struct {
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// NetDialContext is nil, net.DialContext is used.
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NetDialContext func(ctx context.Context, network, addr string) (net.Conn, error)
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// DialTLS specifies the dial function for creating TLS connections
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// for non-proxied HTTPS requests. If DialTLS is nil, net.Dial and
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// net.TLSClientConfig are used.
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DialTLS func(network, addr string) (net.Conn, error)
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// Proxy specifies a function to return a proxy for a given
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// Request. If the function returns a non-nil error, the
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// request is aborted with the provided error.
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@ -234,94 +239,104 @@ func (d *Dialer) DialContext(ctx context.Context, urlStr string, requestHeader h
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defer cancel()
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}
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// Get network dial function.
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var netDial func(network, add string) (net.Conn, error)
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if d.NetDialContext != nil {
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netDial = func(network, addr string) (net.Conn, error) {
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return d.NetDialContext(ctx, network, addr)
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}
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} else if d.NetDial != nil {
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netDial = d.NetDial
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} else {
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netDialer := &net.Dialer{}
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netDial = func(network, addr string) (net.Conn, error) {
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return netDialer.DialContext(ctx, network, addr)
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}
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}
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// If needed, wrap the dial function to set the connection deadline.
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if deadline, ok := ctx.Deadline(); ok {
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forwardDial := netDial
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netDial = func(network, addr string) (net.Conn, error) {
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c, err := forwardDial(network, addr)
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if err != nil {
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return nil, err
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}
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err = c.SetDeadline(deadline)
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if err != nil {
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c.Close()
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return nil, err
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}
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return c, nil
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}
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}
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// If needed, wrap the dial function to connect through a proxy.
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if d.Proxy != nil {
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proxyURL, err := d.Proxy(req)
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if err != nil {
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return nil, nil, err
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}
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if proxyURL != nil {
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dialer, err := proxy_FromURL(proxyURL, netDialerFunc(netDial))
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if err != nil {
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return nil, nil, err
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}
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netDial = dialer.Dial
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}
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}
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hostPort, hostNoPort := hostPortNoPort(u)
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trace := httptrace.ContextClientTrace(ctx)
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if trace != nil && trace.GetConn != nil {
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trace.GetConn(hostPort)
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}
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netConn, err := netDial("tcp", hostPort)
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if trace != nil && trace.GotConn != nil {
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trace.GotConn(httptrace.GotConnInfo{
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Conn: netConn,
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})
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}
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if err != nil {
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return nil, nil, err
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}
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var netConn net.Conn
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defer func() {
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if netConn != nil {
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netConn.Close()
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}
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}()
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if u.Scheme == "https" {
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cfg := cloneTLSConfig(d.TLSClientConfig)
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if cfg.ServerName == "" {
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cfg.ServerName = hostNoPort
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}
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tlsConn := tls.Client(netConn, cfg)
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netConn = tlsConn
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var err error
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if trace != nil {
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err = doHandshakeWithTrace(trace, tlsConn, cfg)
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} else {
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err = doHandshake(tlsConn, cfg)
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}
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if u.Scheme == "https" && d.DialTLS != nil {
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tlsConn, err := d.DialTLS("tcp", hostPort)
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if err != nil {
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return nil, nil, err
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}
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netConn = tlsConn
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} else {
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// Get network dial function.
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var netDial func(network, add string) (net.Conn, error)
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if d.NetDialContext != nil {
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netDial = func(network, addr string) (net.Conn, error) {
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return d.NetDialContext(ctx, network, addr)
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}
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} else if d.NetDial != nil {
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netDial = d.NetDial
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} else {
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netDialer := &net.Dialer{}
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netDial = func(network, addr string) (net.Conn, error) {
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return netDialer.DialContext(ctx, network, addr)
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}
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}
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// If needed, wrap the dial function to set the connection deadline.
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if deadline, ok := ctx.Deadline(); ok {
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forwardDial := netDial
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netDial = func(network, addr string) (net.Conn, error) {
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c, err := forwardDial(network, addr)
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if err != nil {
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return nil, err
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}
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err = c.SetDeadline(deadline)
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if err != nil {
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c.Close()
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return nil, err
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}
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return c, nil
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}
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}
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// If needed, wrap the dial function to connect through a proxy.
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if d.Proxy != nil {
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proxyURL, err := d.Proxy(req)
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if err != nil {
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return nil, nil, err
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}
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if proxyURL != nil {
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dialer, err := proxy_FromURL(proxyURL, netDialerFunc(netDial))
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if err != nil {
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return nil, nil, err
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}
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netDial = dialer.Dial
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}
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}
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var err error
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netConn, err = netDial("tcp", hostPort)
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if trace != nil && trace.GotConn != nil {
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trace.GotConn(httptrace.GotConnInfo{
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Conn: netConn,
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})
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}
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if err != nil {
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return nil, nil, err
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}
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if u.Scheme == "https" {
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cfg := cloneTLSConfig(d.TLSClientConfig)
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if cfg.ServerName == "" {
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cfg.ServerName = hostNoPort
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}
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tlsConn := tls.Client(netConn, cfg)
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netConn = tlsConn
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var err error
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if trace != nil {
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err = doHandshakeWithTrace(trace, tlsConn, cfg)
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} else {
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err = doHandshake(tlsConn, cfg)
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}
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if err != nil {
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return nil, nil, err
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}
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}
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}
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conn := newConn(netConn, false, d.ReadBufferSize, d.WriteBufferSize, d.WriteBufferPool, nil, nil)
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