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bbf6d9b026
Bugfix for feeds
- removed categories related and up
- load new books now working
- category random now working
login page is free of non accessible elements
boolean custom column is vivible in UI
books with only with certain languages can be shown
book shelfs can be deleted from UI
Anonymous user view is more resticted
Added browse of series in sidebar
Dependencys in vendor folder are updated to newer versions (licencs files are now present)
Bugfix editing Authors names
Made upload on windows working
659 lines
18 KiB
Python
659 lines
18 KiB
Python
# -*- coding: utf-8 -*-
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"""
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werkzeug.exceptions
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~~~~~~~~~~~~~~~~~~~
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This module implements a number of Python exceptions you can raise from
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within your views to trigger a standard non-200 response.
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Usage Example
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-------------
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::
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from werkzeug.wrappers import BaseRequest
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from werkzeug.wsgi import responder
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from werkzeug.exceptions import HTTPException, NotFound
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def view(request):
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raise NotFound()
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@responder
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def application(environ, start_response):
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request = BaseRequest(environ)
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try:
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return view(request)
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except HTTPException as e:
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return e
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As you can see from this example those exceptions are callable WSGI
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applications. Because of Python 2.4 compatibility those do not extend
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from the response objects but only from the python exception class.
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As a matter of fact they are not Werkzeug response objects. However you
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can get a response object by calling ``get_response()`` on a HTTP
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exception.
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Keep in mind that you have to pass an environment to ``get_response()``
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because some errors fetch additional information from the WSGI
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environment.
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If you want to hook in a different exception page to say, a 404 status
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code, you can add a second except for a specific subclass of an error::
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@responder
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def application(environ, start_response):
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request = BaseRequest(environ)
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try:
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return view(request)
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except NotFound, e:
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return not_found(request)
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except HTTPException, e:
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return e
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:copyright: (c) 2014 by the Werkzeug Team, see AUTHORS for more details.
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:license: BSD, see LICENSE for more details.
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"""
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import sys
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# Because of bootstrapping reasons we need to manually patch ourselves
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# onto our parent module.
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import werkzeug
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werkzeug.exceptions = sys.modules[__name__]
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from werkzeug._internal import _get_environ
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from werkzeug._compat import iteritems, integer_types, text_type, \
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implements_to_string
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from werkzeug.wrappers import Response
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@implements_to_string
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class HTTPException(Exception):
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"""
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Baseclass for all HTTP exceptions. This exception can be called as WSGI
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application to render a default error page or you can catch the subclasses
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of it independently and render nicer error messages.
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"""
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code = None
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description = None
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def __init__(self, description=None, response=None):
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Exception.__init__(self)
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if description is not None:
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self.description = description
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self.response = response
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@classmethod
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def wrap(cls, exception, name=None):
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"""This method returns a new subclass of the exception provided that
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also is a subclass of `BadRequest`.
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"""
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class newcls(cls, exception):
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def __init__(self, arg=None, *args, **kwargs):
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cls.__init__(self, *args, **kwargs)
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exception.__init__(self, arg)
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newcls.__module__ = sys._getframe(1).f_globals.get('__name__')
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newcls.__name__ = name or cls.__name__ + exception.__name__
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return newcls
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@property
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def name(self):
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"""The status name."""
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return HTTP_STATUS_CODES.get(self.code, 'Unknown Error')
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def get_description(self, environ=None):
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"""Get the description."""
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return u'<p>%s</p>' % escape(self.description)
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def get_body(self, environ=None):
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"""Get the HTML body."""
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return text_type((
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u'<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN">\n'
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u'<title>%(code)s %(name)s</title>\n'
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u'<h1>%(name)s</h1>\n'
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u'%(description)s\n'
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) % {
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'code': self.code,
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'name': escape(self.name),
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'description': self.get_description(environ)
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})
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def get_headers(self, environ=None):
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"""Get a list of headers."""
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return [('Content-Type', 'text/html')]
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def get_response(self, environ=None):
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"""Get a response object. If one was passed to the exception
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it's returned directly.
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:param environ: the optional environ for the request. This
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can be used to modify the response depending
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on how the request looked like.
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:return: a :class:`Response` object or a subclass thereof.
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"""
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if self.response is not None:
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return self.response
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if environ is not None:
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environ = _get_environ(environ)
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headers = self.get_headers(environ)
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return Response(self.get_body(environ), self.code, headers)
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def __call__(self, environ, start_response):
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"""Call the exception as WSGI application.
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:param environ: the WSGI environment.
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:param start_response: the response callable provided by the WSGI
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server.
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"""
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response = self.get_response(environ)
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return response(environ, start_response)
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def __str__(self):
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return '%d: %s' % (self.code, self.name)
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def __repr__(self):
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return '<%s \'%s\'>' % (self.__class__.__name__, self)
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class BadRequest(HTTPException):
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"""*400* `Bad Request`
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Raise if the browser sends something to the application the application
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or server cannot handle.
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"""
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code = 400
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description = (
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'The browser (or proxy) sent a request that this server could '
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'not understand.'
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)
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class ClientDisconnected(BadRequest):
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"""Internal exception that is raised if Werkzeug detects a disconnected
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client. Since the client is already gone at that point attempting to
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send the error message to the client might not work and might ultimately
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result in another exception in the server. Mainly this is here so that
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it is silenced by default as far as Werkzeug is concerned.
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Since disconnections cannot be reliably detected and are unspecified
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by WSGI to a large extent this might or might not be raised if a client
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is gone.
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.. versionadded:: 0.8
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"""
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class SecurityError(BadRequest):
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"""Raised if something triggers a security error. This is otherwise
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exactly like a bad request error.
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.. versionadded:: 0.9
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"""
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class BadHost(BadRequest):
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"""Raised if the submitted host is badly formatted.
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.. versionadded:: 0.11.2
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"""
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class Unauthorized(HTTPException):
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"""*401* `Unauthorized`
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Raise if the user is not authorized. Also used if you want to use HTTP
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basic auth.
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"""
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code = 401
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description = (
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'The server could not verify that you are authorized to access '
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'the URL requested. You either supplied the wrong credentials (e.g. '
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'a bad password), or your browser doesn\'t understand how to supply '
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'the credentials required.'
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)
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class Forbidden(HTTPException):
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"""*403* `Forbidden`
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Raise if the user doesn't have the permission for the requested resource
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but was authenticated.
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"""
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code = 403
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description = (
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'You don\'t have the permission to access the requested resource. '
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'It is either read-protected or not readable by the server.'
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)
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class NotFound(HTTPException):
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"""*404* `Not Found`
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Raise if a resource does not exist and never existed.
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"""
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code = 404
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description = (
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'The requested URL was not found on the server. '
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'If you entered the URL manually please check your spelling and '
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'try again.'
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)
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class MethodNotAllowed(HTTPException):
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"""*405* `Method Not Allowed`
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Raise if the server used a method the resource does not handle. For
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example `POST` if the resource is view only. Especially useful for REST.
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The first argument for this exception should be a list of allowed methods.
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Strictly speaking the response would be invalid if you don't provide valid
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methods in the header which you can do with that list.
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"""
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code = 405
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description = 'The method is not allowed for the requested URL.'
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def __init__(self, valid_methods=None, description=None):
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"""Takes an optional list of valid http methods
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starting with werkzeug 0.3 the list will be mandatory."""
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HTTPException.__init__(self, description)
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self.valid_methods = valid_methods
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def get_headers(self, environ):
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headers = HTTPException.get_headers(self, environ)
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if self.valid_methods:
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headers.append(('Allow', ', '.join(self.valid_methods)))
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return headers
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class NotAcceptable(HTTPException):
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"""*406* `Not Acceptable`
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Raise if the server can't return any content conforming to the
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`Accept` headers of the client.
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"""
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code = 406
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description = (
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'The resource identified by the request is only capable of '
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'generating response entities which have content characteristics '
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'not acceptable according to the accept headers sent in the '
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'request.'
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)
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class RequestTimeout(HTTPException):
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"""*408* `Request Timeout`
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Raise to signalize a timeout.
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"""
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code = 408
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description = (
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'The server closed the network connection because the browser '
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'didn\'t finish the request within the specified time.'
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)
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class Conflict(HTTPException):
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"""*409* `Conflict`
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Raise to signal that a request cannot be completed because it conflicts
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with the current state on the server.
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.. versionadded:: 0.7
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"""
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code = 409
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description = (
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'A conflict happened while processing the request. The resource '
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'might have been modified while the request was being processed.'
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)
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class Gone(HTTPException):
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"""*410* `Gone`
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Raise if a resource existed previously and went away without new location.
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"""
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code = 410
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description = (
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'The requested URL is no longer available on this server and there '
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'is no forwarding address. If you followed a link from a foreign '
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'page, please contact the author of this page.'
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)
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class LengthRequired(HTTPException):
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"""*411* `Length Required`
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Raise if the browser submitted data but no ``Content-Length`` header which
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is required for the kind of processing the server does.
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"""
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code = 411
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description = (
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'A request with this method requires a valid <code>Content-'
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'Length</code> header.'
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)
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class PreconditionFailed(HTTPException):
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"""*412* `Precondition Failed`
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Status code used in combination with ``If-Match``, ``If-None-Match``, or
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``If-Unmodified-Since``.
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"""
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code = 412
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description = (
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'The precondition on the request for the URL failed positive '
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'evaluation.'
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)
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class RequestEntityTooLarge(HTTPException):
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"""*413* `Request Entity Too Large`
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The status code one should return if the data submitted exceeded a given
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limit.
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"""
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code = 413
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description = (
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'The data value transmitted exceeds the capacity limit.'
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)
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class RequestURITooLarge(HTTPException):
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"""*414* `Request URI Too Large`
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Like *413* but for too long URLs.
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"""
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code = 414
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description = (
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'The length of the requested URL exceeds the capacity limit '
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'for this server. The request cannot be processed.'
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)
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class UnsupportedMediaType(HTTPException):
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"""*415* `Unsupported Media Type`
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The status code returned if the server is unable to handle the media type
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the client transmitted.
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"""
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code = 415
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description = (
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'The server does not support the media type transmitted in '
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'the request.'
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)
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class RequestedRangeNotSatisfiable(HTTPException):
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"""*416* `Requested Range Not Satisfiable`
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The client asked for a part of the file that lies beyond the end
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of the file.
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.. versionadded:: 0.7
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"""
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code = 416
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description = (
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'The server cannot provide the requested range.'
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)
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class ExpectationFailed(HTTPException):
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"""*417* `Expectation Failed`
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The server cannot meet the requirements of the Expect request-header.
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.. versionadded:: 0.7
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"""
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code = 417
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description = (
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'The server could not meet the requirements of the Expect header'
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)
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class ImATeapot(HTTPException):
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"""*418* `I'm a teapot`
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The server should return this if it is a teapot and someone attempted
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to brew coffee with it.
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.. versionadded:: 0.7
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"""
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code = 418
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description = (
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'This server is a teapot, not a coffee machine'
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)
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class UnprocessableEntity(HTTPException):
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"""*422* `Unprocessable Entity`
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Used if the request is well formed, but the instructions are otherwise
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incorrect.
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"""
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code = 422
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description = (
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'The request was well-formed but was unable to be followed '
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'due to semantic errors.'
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)
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class PreconditionRequired(HTTPException):
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"""*428* `Precondition Required`
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The server requires this request to be conditional, typically to prevent
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the lost update problem, which is a race condition between two or more
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clients attempting to update a resource through PUT or DELETE. By requiring
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each client to include a conditional header ("If-Match" or "If-Unmodified-
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Since") with the proper value retained from a recent GET request, the
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server ensures that each client has at least seen the previous revision of
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the resource.
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"""
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code = 428
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description = (
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'This request is required to be conditional; try using "If-Match" '
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'or "If-Unmodified-Since".'
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)
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class TooManyRequests(HTTPException):
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"""*429* `Too Many Requests`
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The server is limiting the rate at which this user receives responses, and
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this request exceeds that rate. (The server may use any convenient method
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to identify users and their request rates). The server may include a
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"Retry-After" header to indicate how long the user should wait before
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retrying.
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"""
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code = 429
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description = (
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'This user has exceeded an allotted request count. Try again later.'
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)
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class RequestHeaderFieldsTooLarge(HTTPException):
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"""*431* `Request Header Fields Too Large`
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The server refuses to process the request because the header fields are too
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large. One or more individual fields may be too large, or the set of all
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headers is too large.
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"""
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code = 431
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description = (
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'One or more header fields exceeds the maximum size.'
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)
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class InternalServerError(HTTPException):
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"""*500* `Internal Server Error`
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Raise if an internal server error occurred. This is a good fallback if an
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unknown error occurred in the dispatcher.
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"""
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code = 500
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description = (
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'The server encountered an internal error and was unable to '
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'complete your request. Either the server is overloaded or there '
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'is an error in the application.'
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)
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class NotImplemented(HTTPException):
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"""*501* `Not Implemented`
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Raise if the application does not support the action requested by the
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browser.
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"""
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code = 501
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description = (
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'The server does not support the action requested by the '
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'browser.'
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)
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class BadGateway(HTTPException):
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"""*502* `Bad Gateway`
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If you do proxying in your application you should return this status code
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if you received an invalid response from the upstream server it accessed
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in attempting to fulfill the request.
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"""
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code = 502
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description = (
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'The proxy server received an invalid response from an upstream '
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'server.'
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)
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class ServiceUnavailable(HTTPException):
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"""*503* `Service Unavailable`
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Status code you should return if a service is temporarily unavailable.
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"""
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code = 503
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description = (
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'The server is temporarily unable to service your request due to '
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'maintenance downtime or capacity problems. Please try again '
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'later.'
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)
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class GatewayTimeout(HTTPException):
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"""*504* `Gateway Timeout`
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Status code you should return if a connection to an upstream server
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times out.
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"""
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code = 504
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description = (
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'The connection to an upstream server timed out.'
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)
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class HTTPVersionNotSupported(HTTPException):
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"""*505* `HTTP Version Not Supported`
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The server does not support the HTTP protocol version used in the request.
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"""
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code = 505
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description = (
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'The server does not support the HTTP protocol version used in the '
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'request.'
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)
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default_exceptions = {}
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__all__ = ['HTTPException']
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def _find_exceptions():
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for name, obj in iteritems(globals()):
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try:
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is_http_exception = issubclass(obj, HTTPException)
|
|
except TypeError:
|
|
is_http_exception = False
|
|
if not is_http_exception or obj.code is None:
|
|
continue
|
|
__all__.append(obj.__name__)
|
|
old_obj = default_exceptions.get(obj.code, None)
|
|
if old_obj is not None and issubclass(obj, old_obj):
|
|
continue
|
|
default_exceptions[obj.code] = obj
|
|
_find_exceptions()
|
|
del _find_exceptions
|
|
|
|
|
|
class Aborter(object):
|
|
|
|
"""
|
|
When passed a dict of code -> exception items it can be used as
|
|
callable that raises exceptions. If the first argument to the
|
|
callable is an integer it will be looked up in the mapping, if it's
|
|
a WSGI application it will be raised in a proxy exception.
|
|
|
|
The rest of the arguments are forwarded to the exception constructor.
|
|
"""
|
|
|
|
def __init__(self, mapping=None, extra=None):
|
|
if mapping is None:
|
|
mapping = default_exceptions
|
|
self.mapping = dict(mapping)
|
|
if extra is not None:
|
|
self.mapping.update(extra)
|
|
|
|
def __call__(self, code, *args, **kwargs):
|
|
if not args and not kwargs and not isinstance(code, integer_types):
|
|
raise HTTPException(response=code)
|
|
if code not in self.mapping:
|
|
raise LookupError('no exception for %r' % code)
|
|
raise self.mapping[code](*args, **kwargs)
|
|
|
|
abort = Aborter()
|
|
|
|
|
|
#: an exception that is used internally to signal both a key error and a
|
|
#: bad request. Used by a lot of the datastructures.
|
|
BadRequestKeyError = BadRequest.wrap(KeyError)
|
|
|
|
|
|
# imported here because of circular dependencies of werkzeug.utils
|
|
from werkzeug.utils import escape
|
|
from werkzeug.http import HTTP_STATUS_CODES
|