You run this Python code to subscribe an HTTPS endpoint to an SNS topic but receive an error:

medium📝 Debug Q7 of 15

AWS - SNS and SQS

sns_client.subscribe(TopicArn='arn:aws:sns:us-east-1:123456789012:MyTopic', Protocol='https', Endpoint='http://example.com')

What is the cause of the error?

AThe Endpoint URL uses 'http://' but the protocol is 'https', causing a mismatch.

BSNS does not support HTTPS protocol for subscriptions.

CThe TopicArn format is incorrect and causes the error.

DThe Endpoint URL must be an IP address, not a domain name.

Step-by-Step Solution

Solution:

Step 1: Check protocol and endpoint URL consistency
The protocol parameter is set to 'https', but the Endpoint URL starts with 'http://', which is inconsistent.
Step 2: Understand SNS subscription requirements
SNS requires the Endpoint URL to match the protocol specified. For 'https' protocol, the endpoint must start with 'https://'.
Final Answer:
The Endpoint URL uses 'http://' but the protocol is 'https', causing a mismatch. -> Option A
Quick Check:
Protocol and endpoint URL scheme must match [OK]

Quick Trick: Ensure Endpoint URL scheme matches the Protocol parameter [OK]

Common Mistakes:

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