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# -*- coding: utf-8 -*-
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# Copyright (C) 2014-2017 RhodeCode GmbH
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Affero General Public License, version 3
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# (only), as published by the Free Software Foundation.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU Affero General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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# This program is dual-licensed. If you wish to learn more about the
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# RhodeCode Enterprise Edition, including its added features, Support services,
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# and proprietary license terms, please see https://rhodecode.com/licenses/
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"""
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SimpleVCS middleware for handling protocol request (push/clone etc.)
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It's implemented with basic auth function
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"""
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import os
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import re
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import logging
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import importlib
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from functools import wraps
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import time
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from paste.httpheaders import REMOTE_USER, AUTH_TYPE
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from webob.exc import (
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HTTPNotFound, HTTPForbidden, HTTPNotAcceptable, HTTPInternalServerError)
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import rhodecode
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from rhodecode.authentication.base import (
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authenticate, get_perms_cache_manager, VCS_TYPE)
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from rhodecode.lib import caches
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from rhodecode.lib.auth import AuthUser, HasPermissionAnyMiddleware
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from rhodecode.lib.base import (
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BasicAuth, get_ip_addr, get_user_agent, vcs_operation_context)
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from rhodecode.lib.exceptions import (
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HTTPLockedRC, HTTPRequirementError, UserCreationError,
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NotAllowedToCreateUserError)
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from rhodecode.lib.hooks_daemon import prepare_callback_daemon
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from rhodecode.lib.middleware import appenlight
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from rhodecode.lib.middleware.utils import scm_app_http
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from rhodecode.lib.utils import is_valid_repo, SLUG_RE
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from rhodecode.lib.utils2 import safe_str, fix_PATH, str2bool, safe_unicode
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from rhodecode.lib.vcs.conf import settings as vcs_settings
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from rhodecode.lib.vcs.backends import base
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from rhodecode.model import meta
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from rhodecode.model.db import User, Repository, PullRequest
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from rhodecode.model.scm import ScmModel
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from rhodecode.model.pull_request import PullRequestModel
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from rhodecode.model.settings import SettingsModel
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log = logging.getLogger(__name__)
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def initialize_generator(factory):
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"""
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Initializes the returned generator by draining its first element.
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This can be used to give a generator an initializer, which is the code
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up to the first yield statement. This decorator enforces that the first
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produced element has the value ``"__init__"`` to make its special
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purpose very explicit in the using code.
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"""
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@wraps(factory)
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def wrapper(*args, **kwargs):
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gen = factory(*args, **kwargs)
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try:
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init = gen.next()
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except StopIteration:
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raise ValueError('Generator must yield at least one element.')
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if init != "__init__":
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raise ValueError('First yielded element must be "__init__".')
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return gen
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return wrapper
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class SimpleVCS(object):
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"""Common functionality for SCM HTTP handlers."""
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SCM = 'unknown'
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acl_repo_name = None
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url_repo_name = None
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vcs_repo_name = None
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# We have to handle requests to shadow repositories different than requests
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# to normal repositories. Therefore we have to distinguish them. To do this
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# we use this regex which will match only on URLs pointing to shadow
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# repositories.
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shadow_repo_re = re.compile(
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'(?P<groups>(?:{slug_pat}/)*)' # repo groups
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'(?P<target>{slug_pat})/' # target repo
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'pull-request/(?P<pr_id>\d+)/' # pull request
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'repository$' # shadow repo
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.format(slug_pat=SLUG_RE.pattern))
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def __init__(self, application, config, registry):
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self.registry = registry
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self.application = application
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self.config = config
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# re-populated by specialized middleware
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self.repo_vcs_config = base.Config()
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self.rhodecode_settings = SettingsModel().get_all_settings(cache=True)
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self.basepath = rhodecode.CONFIG['base_path']
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registry.rhodecode_settings = self.rhodecode_settings
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# authenticate this VCS request using authfunc
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auth_ret_code_detection = \
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str2bool(self.config.get('auth_ret_code_detection', False))
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self.authenticate = BasicAuth(
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'', authenticate, registry, config.get('auth_ret_code'),
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auth_ret_code_detection)
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self.ip_addr = '0.0.0.0'
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def set_repo_names(self, environ):
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"""
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This will populate the attributes acl_repo_name, url_repo_name,
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vcs_repo_name and is_shadow_repo. In case of requests to normal (non
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shadow) repositories all names are equal. In case of requests to a
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shadow repository the acl-name points to the target repo of the pull
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request and the vcs-name points to the shadow repo file system path.
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The url-name is always the URL used by the vcs client program.
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Example in case of a shadow repo:
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acl_repo_name = RepoGroup/MyRepo
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url_repo_name = RepoGroup/MyRepo/pull-request/3/repository
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vcs_repo_name = /repo/base/path/RepoGroup/.__shadow_MyRepo_pr-3'
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"""
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# First we set the repo name from URL for all attributes. This is the
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# default if handling normal (non shadow) repo requests.
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self.url_repo_name = self._get_repository_name(environ)
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self.acl_repo_name = self.vcs_repo_name = self.url_repo_name
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self.is_shadow_repo = False
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# Check if this is a request to a shadow repository.
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match = self.shadow_repo_re.match(self.url_repo_name)
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if match:
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match_dict = match.groupdict()
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# Build acl repo name from regex match.
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acl_repo_name = safe_unicode('{groups}{target}'.format(
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groups=match_dict['groups'] or '',
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target=match_dict['target']))
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# Retrieve pull request instance by ID from regex match.
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pull_request = PullRequest.get(match_dict['pr_id'])
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# Only proceed if we got a pull request and if acl repo name from
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# URL equals the target repo name of the pull request.
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if pull_request and (acl_repo_name ==
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pull_request.target_repo.repo_name):
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# Get file system path to shadow repository.
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workspace_id = PullRequestModel()._workspace_id(pull_request)
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target_vcs = pull_request.target_repo.scm_instance()
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vcs_repo_name = target_vcs._get_shadow_repository_path(
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workspace_id)
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# Store names for later usage.
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self.vcs_repo_name = vcs_repo_name
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self.acl_repo_name = acl_repo_name
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self.is_shadow_repo = True
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log.debug('Setting all VCS repository names: %s', {
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'acl_repo_name': self.acl_repo_name,
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'url_repo_name': self.url_repo_name,
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'vcs_repo_name': self.vcs_repo_name,
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})
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@property
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def scm_app(self):
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custom_implementation = self.config['vcs.scm_app_implementation']
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if custom_implementation == 'http':
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log.info('Using HTTP implementation of scm app.')
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scm_app_impl = scm_app_http
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else:
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log.info('Using custom implementation of scm_app: "{}"'.format(
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custom_implementation))
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scm_app_impl = importlib.import_module(custom_implementation)
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return scm_app_impl
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def _get_by_id(self, repo_name):
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"""
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Gets a special pattern _<ID> from clone url and tries to replace it
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with a repository_name for support of _<ID> non changeable urls
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"""
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data = repo_name.split('/')
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if len(data) >= 2:
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from rhodecode.model.repo import RepoModel
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by_id_match = RepoModel().get_repo_by_id(repo_name)
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if by_id_match:
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data[1] = by_id_match.repo_name
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return safe_str('/'.join(data))
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def _invalidate_cache(self, repo_name):
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"""
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Set's cache for this repository for invalidation on next access
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:param repo_name: full repo name, also a cache key
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"""
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ScmModel().mark_for_invalidation(repo_name)
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def is_valid_and_existing_repo(self, repo_name, base_path, scm_type):
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db_repo = Repository.get_by_repo_name(repo_name)
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if not db_repo:
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log.debug('Repository `%s` not found inside the database.',
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repo_name)
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return False
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if db_repo.repo_type != scm_type:
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log.warning(
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'Repository `%s` have incorrect scm_type, expected %s got %s',
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repo_name, db_repo.repo_type, scm_type)
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return False
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return is_valid_repo(repo_name, base_path, explicit_scm=scm_type)
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def valid_and_active_user(self, user):
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"""
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Checks if that user is not empty, and if it's actually object it checks
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if he's active.
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:param user: user object or None
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:return: boolean
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"""
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if user is None:
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return False
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elif user.active:
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return True
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return False
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@property
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def is_shadow_repo_dir(self):
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return os.path.isdir(self.vcs_repo_name)
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def _check_permission(self, action, user, repo_name, ip_addr=None,
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plugin_id='', plugin_cache_active=False, cache_ttl=0):
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"""
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Checks permissions using action (push/pull) user and repository
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name. If plugin_cache and ttl is set it will use the plugin which
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authenticated the user to store the cached permissions result for N
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amount of seconds as in cache_ttl
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:param action: push or pull action
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:param user: user instance
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:param repo_name: repository name
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"""
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# get instance of cache manager configured for a namespace
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cache_manager = get_perms_cache_manager(custom_ttl=cache_ttl)
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log.debug('AUTH_CACHE_TTL for permissions `%s` active: %s (TTL: %s)',
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plugin_id, plugin_cache_active, cache_ttl)
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# for environ based password can be empty, but then the validation is
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# on the server that fills in the env data needed for authentication
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_perm_calc_hash = caches.compute_key_from_params(
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plugin_id, action, user.user_id, repo_name, ip_addr)
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# _authenticate is a wrapper for .auth() method of plugin.
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# it checks if .auth() sends proper data.
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# For RhodeCodeExternalAuthPlugin it also maps users to
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# Database and maps the attributes returned from .auth()
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# to RhodeCode database. If this function returns data
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# then auth is correct.
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start = time.time()
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log.debug('Running plugin `%s` permissions check', plugin_id)
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def perm_func():
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"""
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This function is used internally in Cache of Beaker to calculate
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Results
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"""
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log.debug('auth: calculating permission access now...')
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# check IP
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inherit = user.inherit_default_permissions
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ip_allowed = AuthUser.check_ip_allowed(
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user.user_id, ip_addr, inherit_from_default=inherit)
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if ip_allowed:
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log.info('Access for IP:%s allowed', ip_addr)
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else:
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return False
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if action == 'push':
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perms = ('repository.write', 'repository.admin')
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if not HasPermissionAnyMiddleware(*perms)(user, repo_name):
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return False
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else:
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# any other action need at least read permission
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perms = (
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'repository.read', 'repository.write', 'repository.admin')
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if not HasPermissionAnyMiddleware(*perms)(user, repo_name):
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return False
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return True
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if plugin_cache_active:
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log.debug('Trying to fetch cached perms by %s', _perm_calc_hash[:6])
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perm_result = cache_manager.get(
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_perm_calc_hash, createfunc=perm_func)
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else:
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perm_result = perm_func()
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auth_time = time.time() - start
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log.debug('Permissions for plugin `%s` completed in %.3fs, '
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'expiration time of fetched cache %.1fs.',
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plugin_id, auth_time, cache_ttl)
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return perm_result
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def _check_ssl(self, environ, start_response):
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"""
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Checks the SSL check flag and returns False if SSL is not present
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and required True otherwise
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"""
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org_proto = environ['wsgi._org_proto']
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# check if we have SSL required ! if not it's a bad request !
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require_ssl = str2bool(self.repo_vcs_config.get('web', 'push_ssl'))
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if require_ssl and org_proto == 'http':
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log.debug('proto is %s and SSL is required BAD REQUEST !',
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org_proto)
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return False
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return True
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def __call__(self, environ, start_response):
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try:
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return self._handle_request(environ, start_response)
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except Exception:
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log.exception("Exception while handling request")
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appenlight.track_exception(environ)
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return HTTPInternalServerError()(environ, start_response)
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finally:
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meta.Session.remove()
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def _handle_request(self, environ, start_response):
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if not self._check_ssl(environ, start_response):
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reason = ('SSL required, while RhodeCode was unable '
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'to detect this as SSL request')
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log.debug('User not allowed to proceed, %s', reason)
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return HTTPNotAcceptable(reason)(environ, start_response)
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if not self.url_repo_name:
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log.warning('Repository name is empty: %s', self.url_repo_name)
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# failed to get repo name, we fail now
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return HTTPNotFound()(environ, start_response)
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log.debug('Extracted repo name is %s', self.url_repo_name)
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ip_addr = get_ip_addr(environ)
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user_agent = get_user_agent(environ)
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username = None
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# skip passing error to error controller
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environ['pylons.status_code_redirect'] = True
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# ======================================================================
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# GET ACTION PULL or PUSH
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# ======================================================================
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action = self._get_action(environ)
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# ======================================================================
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# Check if this is a request to a shadow repository of a pull request.
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# In this case only pull action is allowed.
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# ======================================================================
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if self.is_shadow_repo and action != 'pull':
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reason = 'Only pull action is allowed for shadow repositories.'
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log.debug('User not allowed to proceed, %s', reason)
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return HTTPNotAcceptable(reason)(environ, start_response)
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# Check if the shadow repo actually exists, in case someone refers
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# to it, and it has been deleted because of successful merge.
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if self.is_shadow_repo and not self.is_shadow_repo_dir:
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return HTTPNotFound()(environ, start_response)
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# ======================================================================
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# CHECK ANONYMOUS PERMISSION
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# ======================================================================
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if action in ['pull', 'push']:
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anonymous_user = User.get_default_user()
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username = anonymous_user.username
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if anonymous_user.active:
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# ONLY check permissions if the user is activated
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anonymous_perm = self._check_permission(
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action, anonymous_user, self.acl_repo_name, ip_addr)
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else:
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anonymous_perm = False
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if not anonymous_user.active or not anonymous_perm:
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if not anonymous_user.active:
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log.debug('Anonymous access is disabled, running '
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'authentication')
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if not anonymous_perm:
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log.debug('Not enough credentials to access this '
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'repository as anonymous user')
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username = None
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# ==============================================================
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# DEFAULT PERM FAILED OR ANONYMOUS ACCESS IS DISABLED SO WE
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# NEED TO AUTHENTICATE AND ASK FOR AUTH USER PERMISSIONS
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# ==============================================================
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# try to auth based on environ, container auth methods
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log.debug('Running PRE-AUTH for container based authentication')
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|
pre_auth = authenticate(
|
|
|
'', '', environ, VCS_TYPE, registry=self.registry,
|
|
|
acl_repo_name=self.acl_repo_name)
|
|
|
if pre_auth and pre_auth.get('username'):
|
|
|
username = pre_auth['username']
|
|
|
log.debug('PRE-AUTH got %s as username', username)
|
|
|
if pre_auth:
|
|
|
log.debug('PRE-AUTH successful from %s',
|
|
|
pre_auth.get('auth_data', {}).get('_plugin'))
|
|
|
|
|
|
# If not authenticated by the container, running basic auth
|
|
|
# before inject the calling repo_name for special scope checks
|
|
|
self.authenticate.acl_repo_name = self.acl_repo_name
|
|
|
|
|
|
plugin_cache_active, cache_ttl = False, 0
|
|
|
plugin = None
|
|
|
if not username:
|
|
|
self.authenticate.realm = self.authenticate.get_rc_realm()
|
|
|
|
|
|
try:
|
|
|
auth_result = self.authenticate(environ)
|
|
|
except (UserCreationError, NotAllowedToCreateUserError) as e:
|
|
|
log.error(e)
|
|
|
reason = safe_str(e)
|
|
|
return HTTPNotAcceptable(reason)(environ, start_response)
|
|
|
|
|
|
if isinstance(auth_result, dict):
|
|
|
AUTH_TYPE.update(environ, 'basic')
|
|
|
REMOTE_USER.update(environ, auth_result['username'])
|
|
|
username = auth_result['username']
|
|
|
plugin = auth_result.get('auth_data', {}).get('_plugin')
|
|
|
log.info(
|
|
|
'MAIN-AUTH successful for user `%s` from %s plugin',
|
|
|
username, plugin)
|
|
|
|
|
|
plugin_cache_active, cache_ttl = auth_result.get(
|
|
|
'auth_data', {}).get('_ttl_cache') or (False, 0)
|
|
|
else:
|
|
|
return auth_result.wsgi_application(
|
|
|
environ, start_response)
|
|
|
|
|
|
|
|
|
# ==============================================================
|
|
|
# CHECK PERMISSIONS FOR THIS REQUEST USING GIVEN USERNAME
|
|
|
# ==============================================================
|
|
|
user = User.get_by_username(username)
|
|
|
if not self.valid_and_active_user(user):
|
|
|
return HTTPForbidden()(environ, start_response)
|
|
|
username = user.username
|
|
|
user.update_lastactivity()
|
|
|
meta.Session().commit()
|
|
|
|
|
|
# check user attributes for password change flag
|
|
|
user_obj = user
|
|
|
if user_obj and user_obj.username != User.DEFAULT_USER and \
|
|
|
user_obj.user_data.get('force_password_change'):
|
|
|
reason = 'password change required'
|
|
|
log.debug('User not allowed to authenticate, %s', reason)
|
|
|
return HTTPNotAcceptable(reason)(environ, start_response)
|
|
|
|
|
|
# check permissions for this repository
|
|
|
perm = self._check_permission(
|
|
|
action, user, self.acl_repo_name, ip_addr,
|
|
|
plugin, plugin_cache_active, cache_ttl)
|
|
|
if not perm:
|
|
|
return HTTPForbidden()(environ, start_response)
|
|
|
|
|
|
# extras are injected into UI object and later available
|
|
|
# in hooks executed by RhodeCode
|
|
|
check_locking = _should_check_locking(environ.get('QUERY_STRING'))
|
|
|
extras = vcs_operation_context(
|
|
|
environ, repo_name=self.acl_repo_name, username=username,
|
|
|
action=action, scm=self.SCM, check_locking=check_locking,
|
|
|
is_shadow_repo=self.is_shadow_repo
|
|
|
)
|
|
|
|
|
|
# ======================================================================
|
|
|
# REQUEST HANDLING
|
|
|
# ======================================================================
|
|
|
repo_path = os.path.join(
|
|
|
safe_str(self.basepath), safe_str(self.vcs_repo_name))
|
|
|
log.debug('Repository path is %s', repo_path)
|
|
|
|
|
|
fix_PATH()
|
|
|
|
|
|
log.info(
|
|
|
'%s action on %s repo "%s" by "%s" from %s %s',
|
|
|
action, self.SCM, safe_str(self.url_repo_name),
|
|
|
safe_str(username), ip_addr, user_agent)
|
|
|
|
|
|
return self._generate_vcs_response(
|
|
|
environ, start_response, repo_path, extras, action)
|
|
|
|
|
|
@initialize_generator
|
|
|
def _generate_vcs_response(
|
|
|
self, environ, start_response, repo_path, extras, action):
|
|
|
"""
|
|
|
Returns a generator for the response content.
|
|
|
|
|
|
This method is implemented as a generator, so that it can trigger
|
|
|
the cache validation after all content sent back to the client. It
|
|
|
also handles the locking exceptions which will be triggered when
|
|
|
the first chunk is produced by the underlying WSGI application.
|
|
|
"""
|
|
|
callback_daemon, extras = self._prepare_callback_daemon(extras)
|
|
|
config = self._create_config(extras, self.acl_repo_name)
|
|
|
log.debug('HOOKS extras is %s', extras)
|
|
|
app = self._create_wsgi_app(repo_path, self.url_repo_name, config)
|
|
|
|
|
|
try:
|
|
|
with callback_daemon:
|
|
|
try:
|
|
|
response = app(environ, start_response)
|
|
|
finally:
|
|
|
# This statement works together with the decorator
|
|
|
# "initialize_generator" above. The decorator ensures that
|
|
|
# we hit the first yield statement before the generator is
|
|
|
# returned back to the WSGI server. This is needed to
|
|
|
# ensure that the call to "app" above triggers the
|
|
|
# needed callback to "start_response" before the
|
|
|
# generator is actually used.
|
|
|
yield "__init__"
|
|
|
|
|
|
for chunk in response:
|
|
|
yield chunk
|
|
|
except Exception as exc:
|
|
|
# TODO: martinb: Exceptions are only raised in case of the Pyro4
|
|
|
# backend. Refactor this except block after dropping Pyro4 support.
|
|
|
# TODO: johbo: Improve "translating" back the exception.
|
|
|
if getattr(exc, '_vcs_kind', None) == 'repo_locked':
|
|
|
exc = HTTPLockedRC(*exc.args)
|
|
|
_code = rhodecode.CONFIG.get('lock_ret_code')
|
|
|
log.debug('Repository LOCKED ret code %s!', (_code,))
|
|
|
elif getattr(exc, '_vcs_kind', None) == 'requirement':
|
|
|
log.debug(
|
|
|
'Repository requires features unknown to this Mercurial')
|
|
|
exc = HTTPRequirementError(*exc.args)
|
|
|
else:
|
|
|
raise
|
|
|
|
|
|
for chunk in exc(environ, start_response):
|
|
|
yield chunk
|
|
|
finally:
|
|
|
# invalidate cache on push
|
|
|
try:
|
|
|
if action == 'push':
|
|
|
self._invalidate_cache(self.url_repo_name)
|
|
|
finally:
|
|
|
meta.Session.remove()
|
|
|
|
|
|
def _get_repository_name(self, environ):
|
|
|
"""Get repository name out of the environmnent
|
|
|
|
|
|
:param environ: WSGI environment
|
|
|
"""
|
|
|
raise NotImplementedError()
|
|
|
|
|
|
def _get_action(self, environ):
|
|
|
"""Map request commands into a pull or push command.
|
|
|
|
|
|
:param environ: WSGI environment
|
|
|
"""
|
|
|
raise NotImplementedError()
|
|
|
|
|
|
def _create_wsgi_app(self, repo_path, repo_name, config):
|
|
|
"""Return the WSGI app that will finally handle the request."""
|
|
|
raise NotImplementedError()
|
|
|
|
|
|
def _create_config(self, extras, repo_name):
|
|
|
"""Create a safe config representation."""
|
|
|
raise NotImplementedError()
|
|
|
|
|
|
def _prepare_callback_daemon(self, extras):
|
|
|
return prepare_callback_daemon(
|
|
|
extras, protocol=vcs_settings.HOOKS_PROTOCOL,
|
|
|
use_direct_calls=vcs_settings.HOOKS_DIRECT_CALLS)
|
|
|
|
|
|
|
|
|
def _should_check_locking(query_string):
|
|
|
# this is kind of hacky, but due to how mercurial handles client-server
|
|
|
# server see all operation on commit; bookmarks, phases and
|
|
|
# obsolescence marker in different transaction, we don't want to check
|
|
|
# locking on those
|
|
|
return query_string not in ['cmd=listkeys']
|
|
|
|
