62 lines
1.9 KiB
Go
62 lines
1.9 KiB
Go
package roundtripper
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import (
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"context"
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"fmt"
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"net"
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"net/http"
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"net/url"
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"time"
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"gitlab.com/gitlab-org/labkit/correlation"
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"gitlab.com/gitlab-org/labkit/tracing"
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"gitlab.com/gitlab-org/gitlab-workhorse/internal/badgateway"
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)
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func mustParseAddress(address, scheme string) string {
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if scheme == "https" {
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panic("TLS is not supported for backend connections")
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}
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for _, suffix := range []string{"", ":" + scheme} {
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address += suffix
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if host, port, err := net.SplitHostPort(address); err == nil && host != "" && port != "" {
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return host + ":" + port
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}
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}
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panic(fmt.Errorf("could not parse host:port from address %q and scheme %q", address, scheme))
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}
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// NewBackendRoundTripper returns a new RoundTripper instance using the provided values
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func NewBackendRoundTripper(backend *url.URL, socket string, proxyHeadersTimeout time.Duration, developmentMode bool) http.RoundTripper {
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// Copied from the definition of http.DefaultTransport. We can't literally copy http.DefaultTransport because of its hidden internal state.
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transport, dialer := newBackendTransport()
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transport.ResponseHeaderTimeout = proxyHeadersTimeout
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if backend != nil && socket == "" {
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address := mustParseAddress(backend.Host, backend.Scheme)
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transport.DialContext = func(ctx context.Context, network, addr string) (net.Conn, error) {
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return dialer.DialContext(ctx, "tcp", address)
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}
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} else if socket != "" {
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transport.DialContext = func(ctx context.Context, network, addr string) (net.Conn, error) {
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return dialer.DialContext(ctx, "unix", socket)
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}
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} else {
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panic("backend is nil and socket is empty")
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}
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return tracing.NewRoundTripper(
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correlation.NewInstrumentedRoundTripper(
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badgateway.NewRoundTripper(developmentMode, transport),
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),
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)
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}
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// NewTestBackendRoundTripper sets up a RoundTripper for testing purposes
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func NewTestBackendRoundTripper(backend *url.URL) http.RoundTripper {
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return NewBackendRoundTripper(backend, "", 0, true)
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}
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