Merge pull request #35 from nenad/hotfix/prevent-overriding-headers-g…

…uzzle Prevent overriding already set headers
nenad · Sep 17, 2019 · cbccbc2 · cbccbc2
2 parents 615dd96 + f5dbb3b
commit cbccbc2
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/Trace/Integrations/Guzzle/EventSubscriber.php b/src/Trace/Integrations/Guzzle/EventSubscriber.php
@@ -104,7 +104,7 @@ public function onBefore(BeforeEvent $event)
         $request = $event->getRequest();
         $headers = new ArrayHeaders();
         $this->propagator->inject($this->tracer->spanContext(), $headers);
-        $request->setHeaders($headers->toArray());
+        $request->addHeaders($headers->toArray());
 
         $attrHeaders = [];
         foreach ($request->getHeaders() as $name => $values) {