mirror of
https://github.com/VictoriaMetrics/VictoriaMetrics.git
synced 2026-05-17 08:36:55 +03:00
524f58c78c
This should allow detecting the client, which led to the error logged via SendPrometheusError() function,
e.g. this improves troubleshooting of the logged errors.
This is a follow-up for c9bb4ddeed
47 lines
1.2 KiB
Go
47 lines
1.2 KiB
Go
package httpserver
|
|
|
|
import (
|
|
"errors"
|
|
"net/http"
|
|
)
|
|
|
|
// SendPrometheusError sends err to w in Prometheus querying API response format.
|
|
//
|
|
// See https://prometheus.io/docs/prometheus/latest/querying/api/#format-overview for more details
|
|
func SendPrometheusError(w http.ResponseWriter, r *http.Request, err error) {
|
|
errStr := err.Error()
|
|
logHTTPError(r, errStr)
|
|
|
|
w.Header().Set("Content-Type", "application/json")
|
|
statusCode := http.StatusUnprocessableEntity
|
|
var esc *ErrorWithStatusCode
|
|
if errors.As(err, &esc) {
|
|
statusCode = esc.StatusCode
|
|
}
|
|
w.WriteHeader(statusCode)
|
|
|
|
var ure *UserReadableError
|
|
if errors.As(err, &ure) {
|
|
err = ure
|
|
}
|
|
WritePrometheusErrorResponse(w, statusCode, err)
|
|
}
|
|
|
|
// UserReadableError is a type of error which supposed to be returned to the user without additional context.
|
|
type UserReadableError struct {
|
|
// Err is the error which needs to be returned to the user.
|
|
Err error
|
|
}
|
|
|
|
// Unwrap returns ure.Err.
|
|
//
|
|
// This is used by standard errors package. See https://golang.org/pkg/errors
|
|
func (ure *UserReadableError) Unwrap() error {
|
|
return ure.Err
|
|
}
|
|
|
|
// Error satisfies Error interface
|
|
func (ure *UserReadableError) Error() string {
|
|
return ure.Err.Error()
|
|
}
|