Handle Referer Header special case (#515)

Author: ggallotti

gxawsserverless/src/main/java/com/genexus/cloud/serverless/aws/LambdaHandler.java

@@ -24,6 +24,7 @@
 import com.genexus.webpanels.*;
 
 import java.util.Enumeration;
+import java.util.List;
 import java.util.concurrent.CountDownLatch;
 
 import com.amazonaws.serverless.proxy.internal.servlet.AwsProxyHttpServletResponseWriter;
@@ -74,6 +75,12 @@ private void handleSpecialMethods(AwsProxyRequest awsProxyRequest) {
 			qString.add("", parmValue);
 			awsProxyRequest.setMultiValueQueryStringParameters(qString);
 		}
+
+		// In Jersey lambda context, the Referer Header has a special meaning. So we copy it to another Header.
+		List<String> referer = awsProxyRequest.getMultiValueHeaders().get("Referer");
+		if (referer != null && !referer.isEmpty()) {
+			awsProxyRequest.getMultiValueHeaders().put("GX-Referer", referer);
+		}
 	}
 
 	private AwsProxyResponse handleServletRequest(AwsProxyRequest awsProxyRequest, Context context) {