From b62f8e058270aff37621b69a9768235a01e8bd34 Mon Sep 17 00:00:00 2001
From: Matthew Holt <mholt@users.noreply.github.com>
Date: Mon, 16 Mar 2020 16:08:33 -0600
Subject: caddyhttp: Support path matcher of "*" without panic

---
 modules/caddyhttp/matchers.go      | 10 +++++++++-
 modules/caddyhttp/matchers_test.go | 20 ++++++++++++++++++++
 2 files changed, 29 insertions(+), 1 deletion(-)

diff --git a/modules/caddyhttp/matchers.go b/modules/caddyhttp/matchers.go
index 6b57ead..988c92d 100644
--- a/modules/caddyhttp/matchers.go
+++ b/modules/caddyhttp/matchers.go
@@ -211,9 +211,17 @@ func (m MatchPath) Match(r *http.Request) bool {
 	for _, matchPath := range m {
 		matchPath = repl.ReplaceAll(matchPath, "")
 
+		// special case: whole path is wildcard; this is unnecessary
+		// as it matches all requests, which is the same as no matcher
+		if matchPath == "*" {
+			return true
+		}
+
 		// special case: first and last characters are wildcard,
 		// treat it as a fast substring match
-		if strings.HasPrefix(matchPath, "*") && strings.HasSuffix(matchPath, "*") {
+		if len(matchPath) > 1 &&
+			strings.HasPrefix(matchPath, "*") &&
+			strings.HasSuffix(matchPath, "*") {
 			if strings.Contains(lowerPath, matchPath[1:len(matchPath)-1]) {
 				return true
 			}
diff --git a/modules/caddyhttp/matchers_test.go b/modules/caddyhttp/matchers_test.go
index 3b5afd2..1e50776 100644
--- a/modules/caddyhttp/matchers_test.go
+++ b/modules/caddyhttp/matchers_test.go
@@ -252,6 +252,26 @@ func TestPathMatcher(t *testing.T) {
 			input:  "/foo/BAR.txt",
 			expect: true,
 		},
+		{
+			match:  MatchPath{"*"},
+			input:  "/",
+			expect: true,
+		},
+		{
+			match:  MatchPath{"*"},
+			input:  "/foo/bar",
+			expect: true,
+		},
+		{
+			match:  MatchPath{"**"},
+			input:  "/",
+			expect: true,
+		},
+		{
+			match:  MatchPath{"**"},
+			input:  "/foo/bar",
+			expect: true,
+		},
 	} {
 		req := &http.Request{URL: &url.URL{Path: tc.input}}
 		repl := caddy.NewReplacer()
-- 
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