path-permissions: Handle scm_instance() returning None

rhodecode/apps/_base/__init__.py

@@ -1,622 +1,625 b''
 # -*- coding: utf-8 -*-
 
 # Copyright (C) 2016-2018 RhodeCode GmbH
 #
 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU Affero General Public License, version 3
 # (only), as published by the Free Software Foundation.
 #
 # 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 Affero General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #
 # This program is dual-licensed. If you wish to learn more about the
 # RhodeCode Enterprise Edition, including its added features, Support services,
 # and proprietary license terms, please see https://rhodecode.com/licenses/
 
 import time
 import logging
 import operator
 
 from pyramid.httpexceptions import HTTPFound, HTTPForbidden
 
 from rhodecode.lib import helpers as h, diffs
 from rhodecode.lib.utils2 import StrictAttributeDict, safe_int, datetime_to_time
 from rhodecode.lib.vcs.exceptions import RepositoryRequirementError
 from rhodecode.model import repo
 from rhodecode.model import repo_group
 from rhodecode.model import user_group
 from rhodecode.model import user
 from rhodecode.model.db import User
 from rhodecode.model.scm import ScmModel
 
 log = logging.getLogger(__name__)
 
 
 ADMIN_PREFIX = '/_admin'
 STATIC_FILE_PREFIX = '/_static'
 
 URL_NAME_REQUIREMENTS = {
     # group name can have a slash in them, but they must not end with a slash
     'group_name': r'.*?[^/]',
     'repo_group_name': r'.*?[^/]',
     # repo names can have a slash in them, but they must not end with a slash
     'repo_name': r'.*?[^/]',
     # file path eats up everything at the end
     'f_path': r'.*',
     # reference types
     'source_ref_type': '(branch|book|tag|rev|\%\(source_ref_type\)s)',
     'target_ref_type': '(branch|book|tag|rev|\%\(target_ref_type\)s)',
 }
 
 
 def add_route_with_slash(config,name, pattern, **kw):
     config.add_route(name, pattern, **kw)
     if not pattern.endswith('/'):
         config.add_route(name + '_slash', pattern + '/', **kw)
 
 
 def add_route_requirements(route_path, requirements=URL_NAME_REQUIREMENTS):
     """
     Adds regex requirements to pyramid routes using a mapping dict
     e.g::
         add_route_requirements('{repo_name}/settings')
     """
     for key, regex in requirements.items():
         route_path = route_path.replace('{%s}' % key, '{%s:%s}' % (key, regex))
     return route_path
 
 
 def get_format_ref_id(repo):
     """Returns a `repo` specific reference formatter function"""
     if h.is_svn(repo):
         return _format_ref_id_svn
     else:
         return _format_ref_id
 
 
 def _format_ref_id(name, raw_id):
     """Default formatting of a given reference `name`"""
     return name
 
 
 def _format_ref_id_svn(name, raw_id):
     """Special way of formatting a reference for Subversion including path"""
     return '%s@%s' % (name, raw_id)
 
 
 class TemplateArgs(StrictAttributeDict):
     pass
 
 
 class BaseAppView(object):
 
     def __init__(self, context, request):
         self.request = request
         self.context = context
         self.session = request.session
         self._rhodecode_user = request.user  # auth user
         self._rhodecode_db_user = self._rhodecode_user.get_instance()
         self._maybe_needs_password_change(
             request.matched_route.name, self._rhodecode_db_user)
 
     def _maybe_needs_password_change(self, view_name, user_obj):
         log.debug('Checking if user %s needs password change on view %s',
                   user_obj, view_name)
         skip_user_views = [
             'logout', 'login',
             'my_account_password', 'my_account_password_update'
         ]
 
         if not user_obj:
             return
 
         if user_obj.username == User.DEFAULT_USER:
             return
 
         now = time.time()
         should_change = user_obj.user_data.get('force_password_change')
         change_after = safe_int(should_change) or 0
         if should_change and now > change_after:
             log.debug('User %s requires password change', user_obj)
             h.flash('You are required to change your password', 'warning',
                     ignore_duplicate=True)
 
             if view_name not in skip_user_views:
                 raise HTTPFound(
                     self.request.route_path('my_account_password'))
 
     def _log_creation_exception(self, e, repo_name):
         _ = self.request.translate
         reason = None
         if len(e.args) == 2:
             reason = e.args[1]
 
         if reason == 'INVALID_CERTIFICATE':
             log.exception(
                 'Exception creating a repository: invalid certificate')
             msg = (_('Error creating repository %s: invalid certificate')
                    % repo_name)
         else:
             log.exception("Exception creating a repository")
             msg = (_('Error creating repository %s')
                    % repo_name)
         return msg
 
     def _get_local_tmpl_context(self, include_app_defaults=True):
         c = TemplateArgs()
         c.auth_user = self.request.user
         # TODO(marcink): migrate the usage of c.rhodecode_user to c.auth_user
         c.rhodecode_user = self.request.user
 
         if include_app_defaults:
             from rhodecode.lib.base import attach_context_attributes
             attach_context_attributes(c, self.request, self.request.user.user_id)
 
         return c
 
     def _get_template_context(self, tmpl_args, **kwargs):
 
         local_tmpl_args = {
             'defaults': {},
             'errors': {},
             'c': tmpl_args
         }
         local_tmpl_args.update(kwargs)
         return local_tmpl_args
 
     def load_default_context(self):
         """
         example:
 
         def load_default_context(self):
             c = self._get_local_tmpl_context()
             c.custom_var = 'foobar'
 
             return c
         """
         raise NotImplementedError('Needs implementation in view class')
 
 
 class RepoAppView(BaseAppView):
 
     def __init__(self, context, request):
         super(RepoAppView, self).__init__(context, request)
         self.db_repo = request.db_repo
         self.db_repo_name = self.db_repo.repo_name
         self.db_repo_pull_requests = ScmModel().get_pull_requests(self.db_repo)
 
     def _handle_missing_requirements(self, error):
         log.error(
             'Requirements are missing for repository %s: %s',
             self.db_repo_name, error.message)
 
     def _get_local_tmpl_context(self, include_app_defaults=True):
         _ = self.request.translate
         c = super(RepoAppView, self)._get_local_tmpl_context(
             include_app_defaults=include_app_defaults)
 
         # register common vars for this type of view
         c.rhodecode_db_repo = self.db_repo
         c.repo_name = self.db_repo_name
         c.repository_pull_requests = self.db_repo_pull_requests
 
         c.repository_requirements_missing = False
         try:
             self.rhodecode_vcs_repo = self.db_repo.scm_instance()
+            if self.rhodecode_vcs_repo:
             self.path_filter = PathFilter(self.rhodecode_vcs_repo.get_path_permissions(c.auth_user.username))
+            else:
+                self.path_filter = PathFilter(None)
         except RepositoryRequirementError as e:
             c.repository_requirements_missing = True
             self._handle_missing_requirements(e)
             self.rhodecode_vcs_repo = None
             self.path_filter = None
 
         c.path_filter = self.path_filter # used by atom_feed_entry.mako
 
         if (not c.repository_requirements_missing
             and self.rhodecode_vcs_repo is None):
             # unable to fetch this repo as vcs instance, report back to user
             h.flash(_(
                 "The repository `%(repo_name)s` cannot be loaded in filesystem. "
                 "Please check if it exist, or is not damaged.") %
                     {'repo_name': c.repo_name},
                     category='error', ignore_duplicate=True)
             raise HTTPFound(h.route_path('home'))
 
         return c
 
     def _get_f_path_unchecked(self, matchdict, default=None):
         """
         Should only be used by redirects, everything else should call _get_f_path
         """
         f_path = matchdict.get('f_path')
         if f_path:
             # fix for multiple initial slashes that causes errors for GIT
             return f_path.lstrip('/')
 
         return default
 
     def _get_f_path(self, matchdict, default=None):
         return self.path_filter.assert_path_permissions(self._get_f_path_unchecked(matchdict, default))
 
 
 class PathFilter(object):
 
     # Expects and instance of BasePathPermissionChecker or None
     def __init__(self, permission_checker):
         self.permission_checker = permission_checker
 
     def assert_path_permissions(self, path):
         if path and self.permission_checker and not self.permission_checker.has_access(path):
             raise HTTPForbidden()
         return path
 
     def filter_patchset(self, patchset):
         if not self.permission_checker or not patchset:
             return patchset, False
         had_filtered = False
         filtered_patchset = []
         for patch in patchset:
             filename = patch.get('filename', None)
             if not filename or self.permission_checker.has_access(filename):
                 filtered_patchset.append(patch)
             else:
                 had_filtered = True
         if had_filtered:
             if isinstance(patchset, diffs.LimitedDiffContainer):
                 filtered_patchset = diffs.LimitedDiffContainer(patchset.diff_limit, patchset.cur_diff_size, filtered_patchset)
             return filtered_patchset, True
         else:
             return patchset, False
 
     def render_patchset_filtered(self, diffset, patchset, source_ref=None, target_ref=None):
         filtered_patchset, has_hidden_changes = self.filter_patchset(patchset)
         result = diffset.render_patchset(filtered_patchset, source_ref=source_ref, target_ref=target_ref)
         result.has_hidden_changes = has_hidden_changes
         return result
 
     def get_raw_patch(self, diff_processor):
         if self.permission_checker is None:
             return diff_processor.as_raw()
         elif self.permission_checker.has_full_access:
             return diff_processor.as_raw()
         else:
             return '# Repository has user-specific filters, raw patch generation is disabled.'
 
     @property
     def is_enabled(self):
         return self.permission_checker is not None
 
 
 class RepoGroupAppView(BaseAppView):
     def __init__(self, context, request):
         super(RepoGroupAppView, self).__init__(context, request)
         self.db_repo_group = request.db_repo_group
         self.db_repo_group_name = self.db_repo_group.group_name
 
     def _revoke_perms_on_yourself(self, form_result):
         _updates = filter(lambda u: self._rhodecode_user.user_id == int(u[0]),
                           form_result['perm_updates'])
         _additions = filter(lambda u: self._rhodecode_user.user_id == int(u[0]),
                             form_result['perm_additions'])
         _deletions = filter(lambda u: self._rhodecode_user.user_id == int(u[0]),
                             form_result['perm_deletions'])
         admin_perm = 'group.admin'
         if _updates and _updates[0][1] != admin_perm or \
            _additions and _additions[0][1] != admin_perm or \
            _deletions and _deletions[0][1] != admin_perm:
             return True
         return False
 
 
 class UserGroupAppView(BaseAppView):
     def __init__(self, context, request):
         super(UserGroupAppView, self).__init__(context, request)
         self.db_user_group = request.db_user_group
         self.db_user_group_name = self.db_user_group.users_group_name
 
 
 class UserAppView(BaseAppView):
     def __init__(self, context, request):
         super(UserAppView, self).__init__(context, request)
         self.db_user = request.db_user
         self.db_user_id = self.db_user.user_id
 
         _ = self.request.translate
         if not request.db_user_supports_default:
             if self.db_user.username == User.DEFAULT_USER:
                 h.flash(_("Editing user `{}` is disabled.".format(
                     User.DEFAULT_USER)), category='warning')
                 raise HTTPFound(h.route_path('users'))
 
 
 class DataGridAppView(object):
     """
     Common class to have re-usable grid rendering components
     """
 
     def _extract_ordering(self, request, column_map=None):
         column_map = column_map or {}
         column_index = safe_int(request.GET.get('order[0][column]'))
         order_dir = request.GET.get(
             'order[0][dir]', 'desc')
         order_by = request.GET.get(
             'columns[%s][data][sort]' % column_index, 'name_raw')
 
         # translate datatable to DB columns
         order_by = column_map.get(order_by) or order_by
 
         search_q = request.GET.get('search[value]')
         return search_q, order_by, order_dir
 
     def _extract_chunk(self, request):
         start = safe_int(request.GET.get('start'), 0)
         length = safe_int(request.GET.get('length'), 25)
         draw = safe_int(request.GET.get('draw'))
         return draw, start, length
 
     def _get_order_col(self, order_by, model):
         if isinstance(order_by, basestring):
             try:
                 return operator.attrgetter(order_by)(model)
             except AttributeError:
                 return None
         else:
             return order_by
 
 
 class BaseReferencesView(RepoAppView):
     """
     Base for reference view for branches, tags and bookmarks.
     """
     def load_default_context(self):
         c = self._get_local_tmpl_context()
 
 
         return c
 
     def load_refs_context(self, ref_items, partials_template):
         _render = self.request.get_partial_renderer(partials_template)
         pre_load = ["author", "date", "message"]
 
         is_svn = h.is_svn(self.rhodecode_vcs_repo)
         is_hg = h.is_hg(self.rhodecode_vcs_repo)
 
         format_ref_id = get_format_ref_id(self.rhodecode_vcs_repo)
 
         closed_refs = {}
         if is_hg:
             closed_refs = self.rhodecode_vcs_repo.branches_closed
 
         data = []
         for ref_name, commit_id in ref_items:
             commit = self.rhodecode_vcs_repo.get_commit(
                 commit_id=commit_id, pre_load=pre_load)
             closed = ref_name in closed_refs
 
             # TODO: johbo: Unify generation of reference links
             use_commit_id = '/' in ref_name or is_svn
 
             if use_commit_id:
                 files_url = h.route_path(
                     'repo_files',
                     repo_name=self.db_repo_name,
                     f_path=ref_name if is_svn else '',
                     commit_id=commit_id)
 
             else:
                 files_url = h.route_path(
                     'repo_files',
                     repo_name=self.db_repo_name,
                     f_path=ref_name if is_svn else '',
                     commit_id=ref_name,
                     _query=dict(at=ref_name))
 
             data.append({
                 "name": _render('name', ref_name, files_url, closed),
                 "name_raw": ref_name,
                 "date": _render('date', commit.date),
                 "date_raw": datetime_to_time(commit.date),
                 "author": _render('author', commit.author),
                 "commit": _render(
                     'commit', commit.message, commit.raw_id, commit.idx),
                 "commit_raw": commit.idx,
                 "compare": _render(
                     'compare', format_ref_id(ref_name, commit.raw_id)),
             })
 
         return data
 
 
 class RepoRoutePredicate(object):
     def __init__(self, val, config):
         self.val = val
 
     def text(self):
         return 'repo_route = %s' % self.val
 
     phash = text
 
     def __call__(self, info, request):
 
         if hasattr(request, 'vcs_call'):
             # skip vcs calls
             return
 
         repo_name = info['match']['repo_name']
         repo_model = repo.RepoModel()
         by_name_match = repo_model.get_by_repo_name(repo_name, cache=True)
 
         def redirect_if_creating(db_repo):
             if db_repo.repo_state in [repo.Repository.STATE_PENDING]:
                 raise HTTPFound(
                     request.route_path('repo_creating',
                                        repo_name=db_repo.repo_name))
 
         if by_name_match:
             # register this as request object we can re-use later
             request.db_repo = by_name_match
             redirect_if_creating(by_name_match)
             return True
 
         by_id_match = repo_model.get_repo_by_id(repo_name)
         if by_id_match:
             request.db_repo = by_id_match
             redirect_if_creating(by_id_match)
             return True
 
         return False
 
 
 class RepoTypeRoutePredicate(object):
     def __init__(self, val, config):
         self.val = val or ['hg', 'git', 'svn']
 
     def text(self):
         return 'repo_accepted_type = %s' % self.val
 
     phash = text
 
     def __call__(self, info, request):
         if hasattr(request, 'vcs_call'):
             # skip vcs calls
             return
 
         rhodecode_db_repo = request.db_repo
 
         log.debug(
             '%s checking repo type for %s in %s',
             self.__class__.__name__, rhodecode_db_repo.repo_type, self.val)
 
         if rhodecode_db_repo.repo_type in self.val:
             return True
         else:
             log.warning('Current view is not supported for repo type:%s',
                         rhodecode_db_repo.repo_type)
             #
             # h.flash(h.literal(
             #     _('Action not supported for %s.' % rhodecode_repo.alias)),
             #     category='warning')
             # return redirect(
             #     route_path('repo_summary', repo_name=cls.rhodecode_db_repo.repo_name))
 
             return False
 
 
 class RepoGroupRoutePredicate(object):
     def __init__(self, val, config):
         self.val = val
 
     def text(self):
         return 'repo_group_route = %s' % self.val
 
     phash = text
 
     def __call__(self, info, request):
         if hasattr(request, 'vcs_call'):
             # skip vcs calls
             return
 
         repo_group_name = info['match']['repo_group_name']
         repo_group_model = repo_group.RepoGroupModel()
         by_name_match = repo_group_model.get_by_group_name(
             repo_group_name, cache=True)
 
         if by_name_match:
             # register this as request object we can re-use later
             request.db_repo_group = by_name_match
             return True
 
         return False
 
 
 class UserGroupRoutePredicate(object):
     def __init__(self, val, config):
         self.val = val
 
     def text(self):
         return 'user_group_route = %s' % self.val
 
     phash = text
 
     def __call__(self, info, request):
         if hasattr(request, 'vcs_call'):
             # skip vcs calls
             return
 
         user_group_id = info['match']['user_group_id']
         user_group_model = user_group.UserGroup()
         by_id_match = user_group_model.get(
             user_group_id, cache=True)
 
         if by_id_match:
             # register this as request object we can re-use later
             request.db_user_group = by_id_match
             return True
 
         return False
 
 
 class UserRoutePredicateBase(object):
     supports_default = None
 
     def __init__(self, val, config):
         self.val = val
 
     def text(self):
         raise NotImplementedError()
 
     def __call__(self, info, request):
         if hasattr(request, 'vcs_call'):
             # skip vcs calls
             return
 
         user_id = info['match']['user_id']
         user_model = user.User()
         by_id_match = user_model.get(
             user_id, cache=True)
 
         if by_id_match:
             # register this as request object we can re-use later
             request.db_user = by_id_match
             request.db_user_supports_default = self.supports_default
             return True
 
         return False
 
 
 class UserRoutePredicate(UserRoutePredicateBase):
     supports_default = False
 
     def text(self):
         return 'user_route = %s' % self.val
 
     phash = text
 
 
 class UserRouteWithDefaultPredicate(UserRoutePredicateBase):
     supports_default = True
 
     def text(self):
         return 'user_with_default_route = %s' % self.val
 
     phash = text
 
 
 def includeme(config):
     config.add_route_predicate(
         'repo_route', RepoRoutePredicate)
     config.add_route_predicate(
         'repo_accepted_types', RepoTypeRoutePredicate)
     config.add_route_predicate(
         'repo_group_route', RepoGroupRoutePredicate)
     config.add_route_predicate(
         'user_group_route', UserGroupRoutePredicate)
     config.add_route_predicate(
         'user_route_with_default', UserRouteWithDefaultPredicate)
     config.add_route_predicate(
         'user_route', UserRoutePredicate)
  No newline at end of file