111 lines
3.2 KiB
Go
111 lines
3.2 KiB
Go
package service
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import (
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"crypto/tls"
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"crypto/x509"
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"errors"
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"net"
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"net/http"
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"time"
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"github.com/containous/traefik/v2/pkg/config/static"
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"github.com/containous/traefik/v2/pkg/log"
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traefiktls "github.com/containous/traefik/v2/pkg/tls"
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"golang.org/x/net/http2"
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)
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type h2cTransportWrapper struct {
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*http2.Transport
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}
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func (t *h2cTransportWrapper) RoundTrip(req *http.Request) (*http.Response, error) {
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req.URL.Scheme = "http"
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return t.Transport.RoundTrip(req)
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}
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// createRoundtripper creates an http.Roundtripper configured with the Transport configuration settings.
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// For the settings that can't be configured in Traefik it uses the default http.Transport settings.
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// An exception to this is the MaxIdleConns setting as we only provide the option MaxIdleConnsPerHost
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// in Traefik at this point in time. Setting this value to the default of 100 could lead to confusing
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// behavior and backwards compatibility issues.
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func createRoundtripper(transportConfiguration *static.ServersTransport) (http.RoundTripper, error) {
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if transportConfiguration == nil {
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return nil, errors.New("no transport configuration given")
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}
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dialer := &net.Dialer{
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Timeout: 30 * time.Second,
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KeepAlive: 30 * time.Second,
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DualStack: true,
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}
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if transportConfiguration.ForwardingTimeouts != nil {
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dialer.Timeout = time.Duration(transportConfiguration.ForwardingTimeouts.DialTimeout)
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}
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transport := &http.Transport{
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Proxy: http.ProxyFromEnvironment,
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DialContext: dialer.DialContext,
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MaxIdleConnsPerHost: transportConfiguration.MaxIdleConnsPerHost,
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IdleConnTimeout: 90 * time.Second,
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TLSHandshakeTimeout: 10 * time.Second,
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ExpectContinueTimeout: 1 * time.Second,
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}
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transport.RegisterProtocol("h2c", &h2cTransportWrapper{
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Transport: &http2.Transport{
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DialTLS: func(netw, addr string, cfg *tls.Config) (net.Conn, error) {
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return net.Dial(netw, addr)
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},
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AllowHTTP: true,
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},
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})
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if transportConfiguration.ForwardingTimeouts != nil {
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transport.ResponseHeaderTimeout = time.Duration(transportConfiguration.ForwardingTimeouts.ResponseHeaderTimeout)
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transport.IdleConnTimeout = time.Duration(transportConfiguration.ForwardingTimeouts.IdleConnTimeout)
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}
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if transportConfiguration.InsecureSkipVerify || len(transportConfiguration.RootCAs) > 0 {
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transport.TLSClientConfig = &tls.Config{
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InsecureSkipVerify: transportConfiguration.InsecureSkipVerify,
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RootCAs: createRootCACertPool(transportConfiguration.RootCAs),
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}
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}
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smartTransport, err := newSmartRoundTripper(transport)
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if err != nil {
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return nil, err
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}
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return smartTransport, nil
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}
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func createRootCACertPool(rootCAs []traefiktls.FileOrContent) *x509.CertPool {
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if len(rootCAs) == 0 {
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return nil
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}
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roots := x509.NewCertPool()
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for _, cert := range rootCAs {
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certContent, err := cert.Read()
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if err != nil {
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log.WithoutContext().Error("Error while read RootCAs", err)
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continue
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}
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roots.AppendCertsFromPEM(certContent)
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}
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return roots
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}
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func setupDefaultRoundTripper(conf *static.ServersTransport) http.RoundTripper {
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transport, err := createRoundtripper(conf)
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if err != nil {
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log.WithoutContext().Errorf("Could not configure HTTP Transport, fallbacking on default transport: %v", err)
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return http.DefaultTransport
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}
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return transport
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}
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