feat(serverHandler): change custom header behavior

- use header.Set() instead of header.Add()
- apply CORS headers before custom headers, so later one can overrides

Author: marjune163

src/serverHandler/aliasHandler.go

@@ -137,12 +137,12 @@ func (h *aliasHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 			return
 		}
 
-		header(w, data.Headers)
-
 		if data.CanCors {
 			cors(w)
 		}
 
+		header(w, data.Headers)
+
 		if data.IsMutate {
 			h.mutate(w, r, data)
 			return

src/serverHandler/header.go

@@ -64,6 +64,6 @@ func (h *aliasHandler) getHeaders(reqUrlPath, reqFsPath string, doGetHeaders boo
 func header(w http.ResponseWriter, headers [][2]string) {
 	header := w.Header()
 	for i := range headers {
-		header.Add(headers[i][0], headers[i][1])
+		header.Set(headers[i][0], headers[i][1])
 	}
 }

test/case/032.custom.header.bash

@@ -19,9 +19,6 @@ sleep 0.05 # wait server ready
 (curl_get_header http://127.0.0.1:3003/file1.txt | grep -q -i 'foo:\s*bar') ||
 	fail "Custom header 'foo:bar' should 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' should 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' should exists"