Flask request.get_json() raise BadRequest

Question

I have a Flask API with this endpoint :

@app.route('/classify/', methods=['POST'])
def classify():
    data = request.get_json()

When I POST a request with python, eveything is fine.

But when I use Postman, I get :

<class 'werkzeug.exceptions.BadRequest'> : 400: Bad Request

I send the same Json with both (I copy/paste it to be sure). I am fairly confident the issue is caused by some "\t" in my json, which are escaped by python but not by Postman.

Is there a way to retrieve the raw json, and process it (escape what needs to be escaped) in the app ? Or another way to get the json ?

EDIT : This is a different question from the one you suggested as duplicate, because yours suggest to use get_json, which is the problem in my case.

Answer 1

Ok, so it turns out you can replace :

data = request.get_json()

By :

data = json.loads(request.data, strict=False) # strict = False allow for escaped char

requests.data contains the json in string format, so you can process the characters that needs to be escaped.