Python Programming Blueprints

Adding a send messages POST request

In our service.py, add the following import:

import json 

Now add the following to our WebServer class:

@http('POST', '/messages') 
def post_message(self, request): 
    data_as_text = request.get_data(as_text=True) 
 
    try: 
        data = json.loads(data_as_text) 
    except json.JSONDecodeError: 
        return 400, 'JSON payload expected' 
 
    try: 
        message = data['message'] 
    except KeyError: 
        return 400, 'No message given' 
 
    self.message_service.save_message(message) 
 
    return 204, '' 

With our new POST entrypoint, we start off by extracting the data from the request. We specify the parameter as_text=True, because we would otherwise get the data back as bytes.

Once we have that data, we can then attempt to load it from JSON into a Python dictionary. ...