Serverless-offline: Proxy Handler could not detect JSON

[rj175]

I am using serverless-offline to test my Lambda functions for a slack bot. When I run sls offline start and point Slack at my ngork.io URL for slack to verify I get:

Serverless: Starting Offline: dev/eu-west-2.

Serverless: Routes for event_receive:
Serverless: POST /event/receive
Serverless: Offline Lambda Server listening on http://localhost:4000

Serverless: Offline listening on http://localhost:3000

Serverless: POST /event/receive (λ: event_receive)
**Proxy Handler could not detect JSON:** 
INFO:root:Got data: {'token': 'xxx-remove-token-xxx', 'challenge': 'xxx-remove-token-xxx', 'type': 'url_verification'}


Serverless: Failure: {
    "statusCode": 200,
    "body": "xxx-remove-token-xxx"
}

I'm not sure whats going on.

I'm writing my code in Python3.7.

[dherault]

Your data is wrong I think it should be a string, not an object. Is that right ?

[rj175]

You mean the data I am receiving or the data going back?

[Melv]

I am noticing this too.

adding a

print("Something")

somewhere in the code produces

Proxy Handler could not detect JSON: Something

it used to be
Python: Something I think :thinking:

---

python --version
Python 3.6.6

[ItayKatzCC]

Any updates in here?

[dherault]

Can someone PR a fix? Shouldn't be hard.