Metadata-Version: 1.1
Name: Flask-ErrorsHandler
Version: 3.0.1
Summary: Customizable errors handler for flask application and blueprints
Home-page: https://github.com/cs91chris/flask_errors_handler
Author: cs91chris
Author-email: cs91chris@voidbrain.me
License: MIT
Description: Flask-ErrorsHandler
        ===================
        
        Set customizable default errors handler for flask app and blueprints.
        
        You can register error handler for:
        
        - api that returns JSON, default response is as API problem specification like (see https://tools.ietf.org/html/rfc7807).
          Instead you can use your own response implementation passed as argument to ``ErrorHandler`` class:
          it must be a decorator and must take 3 args, a dict response, status code and dict headers.
        - web that returns html page or api response if request is XHR
        - you can register custom handlers for blueprint or the entire app
        
        This module provide also an abstract ``ErrorDispatcher`` class in order to dispatch 404 or 405 error to the correct blueprint
        because flask Blueprint does not own url_prefix (see https://github.com/pallets/flask/issues/1498).
        
        There are 2 concrete implementation:
        
        - ``SubdomainDispatcher``: dispatch the error to the handler associate with blueprint with certain subdomain
          (if 2 or more Blueprint has the same subdomain the first blueprint handler matched is used)
        - ``URLPrefixDispatcher``: dispatch the error to the handler associate with blueprint with certain url prefix.
          This will not work if 2 Blueprint are registered under the same url prefix, for example:
          Blueprint A registered under /prefix/blueprint, Blueprint B registered under /prefix, this dispatcher executes the handler
          of B in both case if B is registered after A.
        
        Moreover you can create you own dispatcher by extending ``ErrorDispatcher`` class and implementing ``dispatch`` method.
        Only the *last* ErrorDispatcher registered is executed. This is the best solution I have found, suggestions are welcome.
        
        Notices:
        
        1. In order to use correctly dispatcher you must set prefix or subdomain in Blueprints constructor, see example below.
        2. If you use dispatcher do not register an handler to app object because it overwrites dispatcher.
        3. When using a dispatcher you should use failure handler on app to catch hunandled exceptions
        
        
        QuickStart
        ~~~~~~~~~~
        
        Install ``flask_errors_handler`` using ``pip``:
        
        ::
        
           $ pip install Flask-ErrorsHandler
        
        .. _section-1:
        
        Example usage
        ^^^^^^^^^^^^^
        
        .. code:: python
        
            import flask
        
            from flask_errors_handler import ErrorHandler
        
            app = flask.Flask(__name__)
            error = ErrorHandler(app, dispatcher='urlprefix')
        
            api = flask.Blueprint('api', __name__, url_prefix='/api')
            web = flask.Blueprint('web', __name__, url_prefix='/web')
            custom = flask.Blueprint('custom', __name__, url_prefix='/custom')
        
            error.web_register(web)
            error.api_register(api)
            error.failure_register(app)
        
        
            @error.register(custom)
            def error_handler(exc):
                return str(exc), 500, {'Content-Type': 'text/plain'}
        
        
            @api.route('/')
            def index():
                flask.abort(500, 'Error from api blueprint')
        
        
            @web.route('/')
            def index():
                flask.abort(500, 'Error from web blueprint')
        
        
            @custom.route('/')
            def index():
                flask.abort(500, 'Error from custom blueprint')
        
        
            @app.route('/')
            def index():
                raise NameError("test custom")
        
        
            app.register_blueprint(web)
            app.register_blueprint(api)
            app.register_blueprint(custom)
            app.run()
        
        
        - Go to http://127.0.0.1:5000/api and see error message response as a JSON
        - Go to http://127.0.0.1:5000/web and see error message response as an HTML page
        - Go to http://127.0.0.1:5000/custom and see error message response as a plain text
        
        .. _section-2:
        
        Configuration
        ^^^^^^^^^^^^^
        
        1. ``ERROR_PAGE``: *(default: error.html)* path of html template to use for show error message
        2. ``ERROR_DEFAULT_MSG``: *(default: Unhandled Exception)* default message for unhandled exceptions
        3. ``ERROR_XHR_ENABLED``: *(default: True)* enable or disable api response where request is XHR
        4. ``ERROR_FORCE_CONTENT_TYPE``: *(True)* force response content type to be api problem compliant
        5. ``ERROR_CONTENT_TYPES``: *('json', 'xml'))* list of format types to force content type
        
        License MIT
        
Platform: any
Classifier: Environment :: Web Environment
Classifier: Intended Audience :: Developers
Classifier: License :: OSI Approved :: MIT License
Classifier: Operating System :: OS Independent
Classifier: Programming Language :: Python :: 3
Classifier: Topic :: Internet :: WWW/HTTP :: Dynamic Content
Classifier: Topic :: Software Development :: Libraries :: Python Modules
