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package client
import (
"net/http"
"time"
"gitlab.com/gitlab-org/labkit/correlation"
"gitlab.com/gitlab-org/labkit/log"
"gitlab.com/gitlab-org/labkit/tracing"
)
type transport struct {
next http.RoundTripper
}
func (rt *transport) RoundTrip(request *http.Request) (*http.Response, error) {
ctx := request.Context()
originalRemoteIP, ok := ctx.Value(OriginalRemoteIPContextKey{}).(string)
if ok {
request.Header.Add("X-Forwarded-For", originalRemoteIP)
}
request.Close = true
request.Header.Add("User-Agent", defaultUserAgent)
start := time.Now()
response, err := rt.next.RoundTrip(request)
fields := log.Fields{
"method": request.Method,
"url": request.URL.String(),
"duration_ms": time.Since(start) / time.Millisecond,
}
logger := log.WithContextFields(ctx, fields)
if err != nil {
logger.WithError(err).Error("Internal API unreachable")
return response, err
}
logger = logger.WithField("status", response.StatusCode)
if response.StatusCode >= 400 {
logger.WithError(err).Error("Internal API error")
return response, err
}
if response.ContentLength >= 0 {
logger = logger.WithField("content_length_bytes", response.ContentLength)
}
logger.Info("Finished HTTP request")
return response, nil
}
func newTransport(next http.RoundTripper) http.RoundTripper {
t := &transport{next: next}
return correlation.NewInstrumentedRoundTripper(tracing.NewRoundTripper(t))
}
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