70 lines
1.8 KiB
Go
70 lines
1.8 KiB
Go
package service
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import (
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"crypto/tls"
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"net"
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"net/http"
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"time"
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"github.com/traefik/traefik/v3/pkg/config/dynamic"
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"golang.org/x/net/http/httpguts"
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"golang.org/x/net/http2"
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)
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func newSmartRoundTripper(transport *http.Transport, forwardingTimeouts *dynamic.ForwardingTimeouts) (*smartRoundTripper, error) {
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transportHTTP1 := transport.Clone()
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transportHTTP2, err := http2.ConfigureTransports(transport)
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if err != nil {
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return nil, err
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}
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if forwardingTimeouts != nil {
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transportHTTP2.ReadIdleTimeout = time.Duration(forwardingTimeouts.ReadIdleTimeout)
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transportHTTP2.PingTimeout = time.Duration(forwardingTimeouts.PingTimeout)
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}
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transportH2C := &h2cTransportWrapper{
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Transport: &http2.Transport{
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DialTLS: func(network, addr string, cfg *tls.Config) (net.Conn, error) {
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return net.Dial(network, addr)
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},
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AllowHTTP: true,
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},
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}
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if forwardingTimeouts != nil {
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transportH2C.ReadIdleTimeout = time.Duration(forwardingTimeouts.ReadIdleTimeout)
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transportH2C.PingTimeout = time.Duration(forwardingTimeouts.PingTimeout)
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}
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transport.RegisterProtocol("h2c", transportH2C)
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return &smartRoundTripper{
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http2: transport,
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http: transportHTTP1,
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}, nil
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}
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// smartRoundTripper implements RoundTrip while making sure that HTTP/2 is not used
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// with protocols that start with a Connection Upgrade, such as SPDY or Websocket.
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type smartRoundTripper struct {
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http2 *http.Transport
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http *http.Transport
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}
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func (m *smartRoundTripper) Clone() http.RoundTripper {
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h := m.http.Clone()
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h2 := m.http2.Clone()
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return &smartRoundTripper{http: h, http2: h2}
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}
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func (m *smartRoundTripper) RoundTrip(req *http.Request) (*http.Response, error) {
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// If we have a connection upgrade, we don't use HTTP/2
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if httpguts.HeaderValuesContainsToken(req.Header["Connection"], "Upgrade") {
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return m.http.RoundTrip(req)
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}
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return m.http2.RoundTrip(req)
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}
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