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http: Add error handling for the repo-locked exception. Part of #4237...
http: Add error handling for the repo-locked exception. Part of #4237 Previously the repo locekd exception was raised on return of the call to the hooks daemon and propagates all the way up to the WSGI server (e.g. waitress). In case of locked repos we want to return a custom response which contains an explanation for the user that the repo is locked and who has locked it.

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exceptions.py
68 lines | 2.3 KiB | text/x-python | PythonLexer
# RhodeCode VCSServer provides access to different vcs backends via network.
# Copyright (C) 2014-2016 RodeCode GmbH
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software Foundation,
# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
"""
Special exception handling over the wire.
Since we cannot assume that our client is able to import our exception classes,
this module provides a "wrapping" mechanism to raise plain exceptions
which contain an extra attribute `_vcs_kind` to allow a client to distinguish
different error conditions.
"""
import functools
from pyramid.httpexceptions import HTTPLocked
def _make_exception(kind, *args):
"""
Prepares a base `Exception` instance to be sent over the wire.
To give our caller a hint what this is about, it will attach an attribute
`_vcs_kind` to the exception.
"""
exc = Exception(*args)
exc._vcs_kind = kind
return exc
AbortException = functools.partial(_make_exception, 'abort')
ArchiveException = functools.partial(_make_exception, 'archive')
LookupException = functools.partial(_make_exception, 'lookup')
VcsException = functools.partial(_make_exception, 'error')
RepositoryLockedException = functools.partial(_make_exception, 'repo_locked')
RequirementException = functools.partial(_make_exception, 'requirement')
UnhandledException = functools.partial(_make_exception, 'unhandled')
URLError = functools.partial(_make_exception, 'url_error')
class HTTPRepoLocked(HTTPLocked):
"""
Subclass of HTTPLocked response that allows to set the title and status
code via constructor arguments.
"""
def __init__(self, title, status_code=None, **kwargs):
self.code = status_code or HTTPLocked.code
self.title = title
super(HTTPRepoLocked, self).__init__(**kwargs)