Implement OPTIONS method to make CORS Preflight work

see: aws/serverless-application-model#717
superluminar-io · Sep 25, 2019 · dd55804 · dd55804
1 parent 2094417
commit dd55804
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diff --git a/workshop-files/create_url/app.py b/workshop-files/create_url/app.py
@@ -6,6 +6,16 @@
 dynamodb = boto3.client('dynamodb')
 
 def lambda_handler(event, context):
+    if event["httpMethod"] == "OPTIONS":
+        return {
+            "statusCode": 200,
+            "headers": {
+                "Access-Control-Allow-Origin" : "*",
+                "Access-Control-Allow-Credentials" : True,
+                "Access-Control-Allow-Headers": "authorization, content-type"
+            }
+        }
+
     table_name = os.environ['TABLE_NAME']
     post_parameters = json.loads(event["body"])
     url_to_shorten = post_parameters['url']

diff --git a/workshop-files/template.yaml b/workshop-files/template.yaml
@@ -17,6 +17,14 @@ Resources:
                         RestApiId: !Ref ShortenerApi
                         Path: /short
                         Method: post
+                ProxyApiCors:
+                    Type: Api
+                    Properties:
+                        RestApiId: !Ref ShortenerApi
+                        Path: /short
+                        Method: OPTIONS
+                        Auth:
+                            Authorizer: NONE
             Environment:
                 Variables:
                     TABLE_NAME: !Ref DynamoDBTable