From f1c36680fc8b21d5f8c110d8d3b97c4efe324376 Mon Sep 17 00:00:00 2001
From: Francis Lavoie <lavofr@gmail.com>
Date: Mon, 29 Mar 2021 12:55:29 -0400
Subject: headers: Fix Caddyfile parsing for `request_header` with matchers
 (#4085)

---
 modules/caddyhttp/headers/caddyfile.go | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'modules/caddyhttp/headers')

diff --git a/modules/caddyhttp/headers/caddyfile.go b/modules/caddyhttp/headers/caddyfile.go
index 574e54b..c6ea2fb 100644
--- a/modules/caddyhttp/headers/caddyfile.go
+++ b/modules/caddyhttp/headers/caddyfile.go
@@ -151,6 +151,10 @@ func parseCaddyfile(h httpcaddyfile.Helper) ([]httpcaddyfile.ConfigValue, error)
 //     request_header [<matcher>] [[+|-]<field> [<value|regexp>] [<replacement>]]
 //
 func parseReqHdrCaddyfile(h httpcaddyfile.Helper) ([]httpcaddyfile.ConfigValue, error) {
+	if !h.Next() {
+		return nil, h.ArgErr()
+	}
+
 	matcherSet, err := h.ExtractMatcherSet()
 	if err != nil {
 		return nil, err
-- 
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