From 3d616e8c6d65e5617f5a918d72fb1514c9c7144e Mon Sep 17 00:00:00 2001
From: Matthew Holt <mholt@users.noreply.github.com>
Date: Fri, 11 Mar 2022 12:34:55 -0700
Subject: requestbody: Return HTTP 413 (fix #4558)

---
 modules/caddyhttp/server.go | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

(limited to 'modules/caddyhttp/server.go')

diff --git a/modules/caddyhttp/server.go b/modules/caddyhttp/server.go
index 3d21184..6ab77df 100644
--- a/modules/caddyhttp/server.go
+++ b/modules/caddyhttp/server.go
@@ -17,6 +17,7 @@ package caddyhttp
 import (
 	"context"
 	"encoding/json"
+	"errors"
 	"fmt"
 	"net"
 	"net/http"
@@ -600,7 +601,8 @@ func PrepareRequest(r *http.Request, repl *caddy.Replacer, w http.ResponseWriter
 // If err is a HandlerError, the returned values will
 // have richer information.
 func errLogValues(err error) (status int, msg string, fields []zapcore.Field) {
-	if handlerErr, ok := err.(HandlerError); ok {
+	var handlerErr HandlerError
+	if errors.As(err, &handlerErr) {
 		status = handlerErr.StatusCode
 		if handlerErr.Err == nil {
 			msg = err.Error()
-- 
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