flask_request_arg_parsing.py

# -*- coding: utf-8 -*-

from flask import Flask, request
from flask.ext.restful import Resource, Api
from flask.ext.restful import reqparse

app = Flask(__name__)
api = Api(app)

class Progress(Resource):

    def put(self, id):
        parser = reqparse.RequestParser()
        parser.add_argument('progress', type=float, required=True, location="json")
        args = parser.parse_args()
        return {'id':id, 'progress':args['progress']}

api.add_resource(Progress, '/progress/<string:id>')

if __name__ == '__main__':
    app.run(debug=True)
    
'''
~ % curl http://127.0.0.1:5000/progress/1 -d '{"progress":1.0}' -X PUT -H"Content-Type: application/json"

{
    "id": "1",
    "progress": 1.0
}
~ % curl http://127.0.0.1:5000/progress/1 -d '{"progress":0.0@}' -X PUT -H"Content-Type: application/json"

{
    "message": "Bad Request",
    "status": 400
}
~ % curl http://127.0.0.1:5000/progress/1 -d '{}' -X PUT -H"Content-Type: application/json"

{
    "message": "progress is required in json"
}
'''