mirror of
https://github.com/janeczku/calibre-web
synced 2024-11-17 15:24:53 +00:00
88 lines
3.4 KiB
Python
88 lines
3.4 KiB
Python
# -*- coding: utf-8 -*-
|
|
"""
|
|
flask.debughelpers
|
|
~~~~~~~~~~~~~~~~~~
|
|
|
|
Various helpers to make the development experience better.
|
|
|
|
:copyright: (c) 2011 by Armin Ronacher.
|
|
:license: BSD, see LICENSE for more details.
|
|
"""
|
|
from ._compat import implements_to_string
|
|
|
|
|
|
class UnexpectedUnicodeError(AssertionError, UnicodeError):
|
|
"""Raised in places where we want some better error reporting for
|
|
unexpected unicode or binary data.
|
|
"""
|
|
|
|
|
|
@implements_to_string
|
|
class DebugFilesKeyError(KeyError, AssertionError):
|
|
"""Raised from request.files during debugging. The idea is that it can
|
|
provide a better error message than just a generic KeyError/BadRequest.
|
|
"""
|
|
|
|
def __init__(self, request, key):
|
|
form_matches = request.form.getlist(key)
|
|
buf = ['You tried to access the file "%s" in the request.files '
|
|
'dictionary but it does not exist. The mimetype for the request '
|
|
'is "%s" instead of "multipart/form-data" which means that no '
|
|
'file contents were transmitted. To fix this error you should '
|
|
'provide enctype="multipart/form-data" in your form.' %
|
|
(key, request.mimetype)]
|
|
if form_matches:
|
|
buf.append('\n\nThe browser instead transmitted some file names. '
|
|
'This was submitted: %s' % ', '.join('"%s"' % x
|
|
for x in form_matches))
|
|
self.msg = ''.join(buf)
|
|
|
|
def __str__(self):
|
|
return self.msg
|
|
|
|
|
|
class FormDataRoutingRedirect(AssertionError):
|
|
"""This exception is raised by Flask in debug mode if it detects a
|
|
redirect caused by the routing system when the request method is not
|
|
GET, HEAD or OPTIONS. Reasoning: form data will be dropped.
|
|
"""
|
|
|
|
def __init__(self, request):
|
|
exc = request.routing_exception
|
|
buf = ['A request was sent to this URL (%s) but a redirect was '
|
|
'issued automatically by the routing system to "%s".'
|
|
% (request.url, exc.new_url)]
|
|
|
|
# In case just a slash was appended we can be extra helpful
|
|
if request.base_url + '/' == exc.new_url.split('?')[0]:
|
|
buf.append(' The URL was defined with a trailing slash so '
|
|
'Flask will automatically redirect to the URL '
|
|
'with the trailing slash if it was accessed '
|
|
'without one.')
|
|
|
|
buf.append(' Make sure to directly send your %s-request to this URL '
|
|
'since we can\'t make browsers or HTTP clients redirect '
|
|
'with form data reliably or without user interaction.' %
|
|
request.method)
|
|
buf.append('\n\nNote: this exception is only raised in debug mode')
|
|
AssertionError.__init__(self, ''.join(buf).encode('utf-8'))
|
|
|
|
|
|
def attach_enctype_error_multidict(request):
|
|
"""Since Flask 0.8 we're monkeypatching the files object in case a
|
|
request is detected that does not use multipart form data but the files
|
|
object is accessed.
|
|
"""
|
|
oldcls = request.files.__class__
|
|
class newcls(oldcls):
|
|
def __getitem__(self, key):
|
|
try:
|
|
return oldcls.__getitem__(self, key)
|
|
except KeyError as e:
|
|
if key not in request.form:
|
|
raise
|
|
raise DebugFilesKeyError(request, key)
|
|
newcls.__name__ = oldcls.__name__
|
|
newcls.__module__ = oldcls.__module__
|
|
request.files.__class__ = newcls
|