Check json request in Flask

utils.py

# -*- coding:utf-8 -*-
from functools import wraps

from flask import abort, request


def is_json_request():
    """
    Returns True if the request is json request else False.
    For example::

        @blueprint.get('/posts')
        def post_list_view():
            if not is_json_request():
                return abort(400)
            pass

    :rtype: bool
    """
    best = request.accept_mimetypes.best_match(['application/json', 'text/html'])
    return best == 'application/json' and \
        request.accept_mimetypes[best] > request.accept_mimetypes['text/html']


def accept_json_request(func):
    """
    If you decorate a view with this, it will ensure that the request is json request.
    For example::

        @blueprint.get('/posts')
        @accept_json_request
        def post_list_view():
            pass

    :param func: The view function to decorate
    :type func: function
    """
    @wraps(func)
    def decorated_view(*args, **kwargs):
        if not is_json_request():
            return abort(400)
        return func(*args, **kwargs)
    return decorated_view