Python falcon 模块，before() 实例源码

def falcon(body, headers):
    import falcon

    path = '/hello/{account_id}/test'
    falcon_app = falcon.API('text/plain')

    # def ask(req, resp, params):
    #     params['answer'] = 42

    # @falcon.before(ask)
    class HelloResource:
        def on_get(self, req, resp, account_id):
            user_agent = req.user_agent  # NOQA
            limit = req.get_param('limit') or '10'  # NOQA
            resp.data = body
            resp.set_headers(headers)

    falcon_app.add_route(path, HelloResource())

    return falcon_app

def falcon(body, headers):
    import falcon

    path = '/hello/{account_id}/test'
    falcon_app = falcon.API('text/plain')

    # def ask(req, resp, params):
    #     params['answer'] = 42

    # @falcon.before(ask)
    class HelloResource:
        def on_get(self, req, resp, account_id):
            user_agent = req.user_agent  # NOQA
            limit = req.get_param('limit') or '10'  # NOQA
            resp.data = body
            resp.set_headers(headers)

    falcon_app.add_route(path, HelloResource())

    return falcon_app

def test_raise_status_in_before_hook(self):
        """ Make sure we get the 200 raised by before hook """
        app = falcon.API()
        app.add_route('/status', TestStatusResource())
        client = testing.TestClient(app)

        response = client.simulate_request(path='/status', method='GET')
        assert response.status == falcon.HTTP_200
        assert response.headers['x-failed'] == 'False'
        assert response.text == 'Pass'

def validate_request(req, resp, resource, params):
    '''
    Decorator method to validate token before processing request.
    '''
    # read request body and parse it into a json object.
    data = req.stream

    # token to grant access to API
    # this is set in the environment of the system where API is deployed.
    valid_token = os.environ.get('PY_GOOGLE_AUTH_TOKEN')

    if 'token' not in data:
        msg = 'Please send access token along with your request'
        raise falcon.HTTPBadRequest('Token Required', msg)
    else:
        # token received from the request data.
        req_token = data['token']

        if req_token != valid_token:
            msg = 'Please supply a valid token.'
            raise falcon.HTTPBadRequest('Invalid Token', msg)

    # since stream is a file, it has been read once so won't be able to read it again in the end
    # point functions that are called afterwards, so setting it to the data that was already parsed
    # so that it is available in the functions that follows.
    req.stream = data

def json_app(app):
    class JSONResponseTestResource(SimpleTestResource):
        @jsonresponse
        def on_get(self, req, resp, **kwargs):
            return {"foo": "bar"}

        @jsonrequest
        @falcon.before(capture_responder_args)
        def on_post(self, req, resp):
            return {}

    resource = JSONResponseTestResource()
    app.app.add_route("/_testing", resource)
    return (resource, app)