From ffcde09b976dd85630da73cb4c804b86c63fb760 Mon Sep 17 00:00:00 2001
From: Dylan <dylanpdx@gmail.com>
Date: Mon, 30 May 2022 01:25:53 +0100
Subject: [PATCH] Return HTTP 400 if missing query parameters

---
 combineImg/__init__.py | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/combineImg/__init__.py b/combineImg/__init__.py
index a341f16..f85a3d0 100644
--- a/combineImg/__init__.py
+++ b/combineImg/__init__.py
@@ -116,6 +116,11 @@ def genImageFromURL(urlArray):
     return finalImg
     
 def lambda_handler(event, context):
+    if ("queryStringParameters" not in event):
+        return {
+            "statusCode": 400,
+            "body": "Invalid request."
+        }
     images = event["queryStringParameters"].get("imgs","").split(",")
     for img in images:
         if not img.startswith("https://pbs.twimg.com"):