POST method not being invoked from the URL in API Gateway

Question

I have a basic flask-restx app (main.py) as follows:

ns = Namespace(
    "greetings",
    description="Get Greetings."
)
parser = reqparse.RequestParser()
parser.add_argument("name", type=str, help="name")


@ns.route('/restx/hello/')
class restx_hello(Resource):
    @ns.expect(parser, validate=True)
    def get(self):
        args = parser.parse_args()
        name = args['name']
        g = 'Greetings to you!'
        return 'Hello ' + name + '! I am from restx. ' + g

    @ns.expect(parser, validate=True)
    def post(self):
        args = parser.parse_args()
        name = args['name']
        return 'This is the POST method, ' + name 

As it can be seen in the code, I am calling both GET & POST methods on the route: /greetings/restx/hello/. I have deployed this code on API Gateway and lambda using Serverless.

The serverless.yml file:

service: flask-api

provider:
  name: aws
  runtime: python3.7

functions:
  app:
    handler: wsgi_handler.handler
    events:
      - http: ANY /
      - http: 'ANY {proxy+}'

custom:
  wsgi:
    app: app.app
    pythonBin: python3
    packRequirements: false
  pythonRequirements:
    dockerizePip: non-linux

plugins:
  - serverless-wsgi
  - serverless-python-requirements

On the API Gateway, when I test the GET & POST methods separately from the dashboard, they print their respective outputs.

Screenshot of the GET method

Screenshot of the POST method

I have the following URL for this service: https://abcdefgh.execute-api.eu-central-1.amazonaws.com/dev/{proxy+}.

When I invoke the URL itself from the browser as: https://abcdefgh.execute-api.eu-central-1.amazonaws.com/dev/greetings/restx/hello/?name=Alex it always calls the GET method as follows:

The POST method is never being invoked. What is the mistake that I am doing?

Answer 1

On browser, it always use GET method.

For POST method, you can use POSTMAN tool at: https://www.postman.com

Or use curl on terminal:

curl -X POST url