Update Flask

libs/flask/exceptions.py

@@ -0,0 +1,49 @@
+# -*- coding: utf-8 -*-
+"""
+    flask.exceptions
+    ~~~~~~~~~~~~
+
+    Flask specific additions to :class:`~werkzeug.exceptions.HTTPException`
+
+    :copyright: (c) 2011 by Armin Ronacher.
+    :license: BSD, see LICENSE for more details.
+"""
+from werkzeug.exceptions import HTTPException, BadRequest
+from .helpers import json
+
+
+class JSONHTTPException(HTTPException):
+    """A base class for HTTP exceptions with ``Content-Type:
+    application/json``.
+
+    The ``description`` attribute of this class must set to a string (*not* an
+    HTML string) which describes the error.
+
+    """
+
+    def get_body(self, environ):
+        """Overrides :meth:`werkzeug.exceptions.HTTPException.get_body` to
+        return the description of this error in JSON format instead of HTML.
+
+        """
+        return json.dumps(dict(description=self.get_description(environ)))
+
+    def get_headers(self, environ):
+        """Returns a list of headers including ``Content-Type:
+        application/json``.
+
+        """
+        return [('Content-Type', 'application/json')]
+
+
+class JSONBadRequest(JSONHTTPException, BadRequest):
+    """Represents an HTTP ``400 Bad Request`` error whose body contains an
+    error message in JSON format instead of HTML format (as in the superclass).
+
+    """
+
+    #: The description of the error which occurred as a string.
+    description = (
+        'The browser (or proxy) sent a request that this server could not '
+        'understand.'
+    )