fix(serverHandler/header): allow output same header name multi times

Author: marjune163

src/serverHandler/header.go

@@ -8,6 +8,6 @@ func (h *handler) header(w http.ResponseWriter) {
 	}
 	header := w.Header()
 	for _, headerPair := range h.globalHeaders {
-		header.Set(headerPair[0], headerPair[1])
+		header.Add(headerPair[0], headerPair[1])
 	}
 }

test/case/023.custom.header.bash

@@ -2,13 +2,19 @@
 
 source "$root"/lib.bash
 
-"$ghfs" -l 3003 -r "$fs"/vhost1 --header foo:bar &
+"$ghfs" -l 3003 -r "$fs"/vhost1 --header foo:bar --header 'set-cookie:name1=value1' --header 'set-cookie:name2=value2' &
 sleep 0.05 # wait server ready
 
 (curl_get_header http://127.0.0.1:3003/ | grep -q -i 'foo:\s*bar') ||
-	fail "Custom header not exists"
+	fail "Custom header 'foo:bar' not exists"
 
 (curl_get_header http://127.0.0.1:3003/file1.txt | grep -q -i 'foo:\s*bar') ||
-	fail "Custom header not exists"
+	fail "Custom header 'foo:bar' not exists"
+
+(curl_get_header http://127.0.0.1:3003/ | grep -q -i 'set-cookie:\s*name1=value1') ||
+	fail "Custom header 'set-cookie:name1=value1' not exists"
+
+(curl_get_header http://127.0.0.1:3003/ | grep -q -i 'set-cookie:\s*name2=value2') ||
+	fail "Custom header 'set-cookie:name2=value2' not exists"
 
 jobs -p | xargs kill