Function WriteHTTPError

tsweb/tsweb.go:894–920

WriteHTTPError is the default error response formatter.

(w http.ResponseWriter, r *http.Request, e HTTPError)

// WriteHTTPError is the default error response formatter.
func WriteHTTPError(w http.ResponseWriter, r *http.Request, e HTTPError) {
	// Don't write a response if we've hit a cancellation/abort.
	if r.Context().Err() != nil || errors.Is(e.Err, http.ErrAbortHandler) {
		return
	}

	// Default headers set by http.Error.
	h := w.Header()
	h.Set("Content-Type", "text/plain; charset=utf-8")
	h.Set("X-Content-Type-Options", "nosniff")

	// Custom headers from the error.
	maps.Copy(h, e.Header)

	// Write the msg back to the user.
	w.WriteHeader(e.Code)
	fmt.Fprint(w, e.Msg)

	// If it's a plaintext message, add line breaks and RequestID.
	if strings.HasPrefix(h.Get("Content-Type"), "text/plain") {
		io.WriteString(w, "\n")
		if id := RequestIDFromContext(r.Context()); id != "" {
			io.WriteString(w, id.String())
			io.WriteString(w, "\n")
		}
	}
}

// HTTPError is an error with embedded HTTP response information.
//