Introduce dynamic scope_path regexps
Instead of relying on scope_path's being "one slash deep", we should
instead allow for either:
1. scope_paths that have a pre-defined depth
2. scope_paths that can be arbitrarily deep
We achieve 1 by setting an entities scope_logic to another logic
module. We then recursively call getScopeDepth until we get to the
topmost entity (that is, an unscoped entity).
A little different is the solution to 2, since some entities can have
an arbitrarily deep scope (such as Documents), we need to have some
way of signaling this to getScopePattern. A clean solution is to
return None, rather than a number. If None is returned, the
SCOPE_PATH_ARG_PATTERN is returned as regexp instead, which will
match an arbitrarily deeply nested scope.
The solution for 2 requires that we return None somewhere in the
scope_logic chain, the most straight forward method to do so is to
override getScopeDepth anywhere such a scope is needed and make it
return None. A more elegant solution however, is to set the
scope_logic to that module in all entities that require it.
Patch by: Sverre Rabbelier
#!/usr/bin/env python
#
# Copyright 2007 Google Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
"""Errors used in the urlfetch API
developers.
"""
class Error(Exception):
"""Base URL fetcher error type."""
class InvalidURLError(Error):
"""Raised when the URL given is empty or invalid.
Only http: and https: URLs are allowed. The maximum URL length
allowed is 2048 characters. The login/pass portion is not
allowed. In deployed applications, only ports 80 and 443 for http
and https respectively are allowed.
"""
class DownloadError(Error):
"""Raised when the we could not fetch the URL for any reason.
Note that this exception is only raised when we could not contact the
server. HTTP errors (e.g., 404) are returned in as the status_code field
in the return value of Fetch, and no exception is raised.
"""
class ResponseTooLargeError(Error):
"""Raised when the response was too large and was truncated."""
def __init__(self, response):
self.response = response
class InvalidMethodError(Error):
"""Raised when an invalid value for 'method' is provided"""
class InvalidMethodError(Error):
"""Raised when an invalid value for 'method' is provided"""