refactor: reuse unsafe header regex pattern

EventSource · May 12, 2022 · dc89cfd · dc89cfd
1 parent 10ee0c4
commit dc89cfd
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/lib/eventsource.js b/lib/eventsource.js
@@ -16,6 +16,8 @@ var lineFeed = 10
 var carriageReturn = 13
 // Beyond 256KB we could not observe any gain in performance
 var maxBufferAheadAllocation = 1024 * 256
+// Headers matching the pattern should be removed when redirecting to different origin
+var reUnsafeHeader = /^(cookie|authorization)$/i
 
 function hasBom (buf) {
   return bom.every(function (charCode, index) {
@@ -482,7 +484,7 @@ function MessageEvent (type, eventInitDict) {
 function removeUnsafeHeaders (headers) {
   var safe = {}
   for (var key in headers) {
-    if (/^(cookie|authorization)$/i.test(key)) {
+    if (reUnsafeHeader.test(key)) {
       continue
     }