fix: Console error on some cross-origin requests without NR CAT header (

#1407)
newrelic · Mar 11, 2025 · 6660c44 · 6660c44
1 parent 06e7d2b
commit 6660c44
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Showing 2 changed files with 4 additions and 5 deletions.
diff --git a/src/features/ajax/instrument/index.js b/src/features/ajax/instrument/index.js
@@ -25,6 +25,7 @@ var handlersLen = handlers.length
 
 var origRequest = gosNREUMOriginals().o.REQ
 var origXHR = gosNREUMOriginals().o.XHR
+const NR_CAT_HEADER = 'X-NewRelic-App-Data'
 
 export class Instrument extends InstrumentBase {
   static featureName = FEATURE_NAME
@@ -392,8 +393,8 @@ function subscribeToEvents (agentRef, ee, handler, dt) {
     var size = responseSizeFromXhr(xhr, ctx.lastSize)
     if (size) ctx.metrics.rxSize = size
 
-    if (ctx.sameOrigin) {
-      var header = xhr.getResponseHeader('X-NewRelic-App-Data')
+    if (ctx.sameOrigin && xhr.getAllResponseHeaders().indexOf(NR_CAT_HEADER) >= 0) {
+      var header = xhr.getResponseHeader(NR_CAT_HEADER)
       if (header) {
         handle(SUPPORTABILITY_METRIC, ['Ajax/CrossApplicationTracing/Header/Seen'], undefined, FEATURE_NAMES.metrics, ee)
         ctx.params.cat = header.split(', ').pop()

diff --git a/tests/components/setup-agent.js b/tests/components/setup-agent.js
@@ -54,9 +54,7 @@ export function setupAgent ({ agentOverrides = {}, info = {}, init = {}, loaderC
   runtime = getRuntime(agentIdentifier)
   if (!runtime.timeKeeper) {
     runtime.timeKeeper = new TimeKeeper(agentIdentifier)
-    runtime.timeKeeper.processRumRequest({
-      getResponseHeader: jest.fn(() => (new Date()).toUTCString())
-    }, 450, 600, Date.now())
+    runtime.timeKeeper.processRumRequest({}, 450, 600, Date.now())
   }
   fakeAgent.features = {}
   if (!runtime.harvester) runtime.harvester = new Harvester(fakeAgent)