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# -*- coding: utf-8 -*-
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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 General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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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 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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kallithea.lib.middleware.simplehg
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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SimpleHg middleware for handling mercurial protocol request
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(push/clone etc.). It's implemented with basic auth function
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This file was forked by the Kallithea project in July 2014.
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Original author and date, and relevant copyright and licensing information is below:
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:created_on: Apr 28, 2010
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:author: marcink
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:copyright: (c) 2013 RhodeCode GmbH, and others.
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:license: GPLv3, see LICENSE.md for more details.
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"""
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import os
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import logging
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import traceback
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from paste.httpheaders import REMOTE_USER, AUTH_TYPE
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from webob.exc import HTTPNotFound, HTTPForbidden, HTTPInternalServerError, \
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HTTPNotAcceptable
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from kallithea.model.db import User
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from kallithea.lib.utils2 import safe_str, fix_PATH, get_server_url,\
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_set_extras
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from kallithea.lib.base import BaseVCSController
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from kallithea.lib.utils import make_ui, is_valid_repo, ui_sections
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from kallithea.lib.vcs.utils.hgcompat import RepoError, hgweb_mod
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from kallithea.lib.exceptions import HTTPLockedRC
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from kallithea.lib import auth_modules
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log = logging.getLogger(__name__)
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def is_mercurial(environ):
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"""
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Returns True if request's target is mercurial server - header
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``HTTP_ACCEPT`` of such request would start with ``application/mercurial``.
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"""
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http_accept = environ.get('HTTP_ACCEPT')
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path_info = environ['PATH_INFO']
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if http_accept and http_accept.startswith('application/mercurial'):
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ishg_path = True
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else:
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ishg_path = False
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log.debug('pathinfo: %s detected as Mercurial %s',
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path_info, ishg_path
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)
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return ishg_path
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class SimpleHg(BaseVCSController):
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def _handle_request(self, environ, start_response):
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if not is_mercurial(environ):
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return self.application(environ, start_response)
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if not self._check_ssl(environ):
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return HTTPNotAcceptable('SSL REQUIRED !')(environ, start_response)
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ip_addr = self._get_ip_addr(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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# EXTRACT REPOSITORY NAME FROM ENV
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#======================================================================
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try:
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repo_name = environ['REPO_NAME'] = self.__get_repository(environ)
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log.debug('Extracted repo name is %s', repo_name)
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except Exception:
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return HTTPInternalServerError()(environ, start_response)
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# quick check if that dir exists...
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if not is_valid_repo(repo_name, self.basepath, 'hg'):
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return HTTPNotFound()(environ, start_response)
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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 ANONYMOUS PERMISSION
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#======================================================================
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if action in ['pull', 'push']:
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anonymous_user = self.__get_user('default')
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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(action, anonymous_user,
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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 = auth_modules.authenticate('', '', environ)
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if pre_auth is not None and pre_auth.get('username'):
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username = pre_auth['username']
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log.debug('PRE-AUTH got %s as username', username)
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# If not authenticated by the container, running basic auth
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if not username:
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self.authenticate.realm = \
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safe_str(self.config['realm'])
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result = self.authenticate(environ)
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if isinstance(result, str):
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AUTH_TYPE.update(environ, 'basic')
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REMOTE_USER.update(environ, result)
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username = result
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else:
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return result.wsgi_application(environ, start_response)
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#==============================================================
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# CHECK PERMISSIONS FOR THIS REQUEST USING GIVEN USERNAME
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#==============================================================
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try:
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user = self.__get_user(username)
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if user is None or not user.active:
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return HTTPForbidden()(environ, start_response)
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username = user.username
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except Exception:
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log.error(traceback.format_exc())
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return HTTPInternalServerError()(environ, start_response)
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#check permissions for this repository
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perm = self._check_permission(action, user, repo_name, ip_addr)
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if not perm:
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return HTTPForbidden()(environ, start_response)
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# extras are injected into mercurial UI object and later available
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# in hg hooks executed by kallithea
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from kallithea import CONFIG
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server_url = get_server_url(environ)
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extras = {
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'ip': ip_addr,
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'username': username,
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'action': action,
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'repository': repo_name,
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'scm': 'hg',
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'config': CONFIG['__file__'],
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'server_url': server_url,
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'make_lock': None,
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'locked_by': [None, None]
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}
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#======================================================================
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# MERCURIAL REQUEST HANDLING
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#======================================================================
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str_repo_name = safe_str(repo_name)
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repo_path = os.path.join(safe_str(self.basepath), str_repo_name)
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log.debug('Repository path is %s', repo_path)
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# CHECK LOCKING only if it's not ANONYMOUS USER
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if username != User.DEFAULT_USER:
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log.debug('Checking locking on repository')
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(make_lock,
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locked,
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locked_by) = self._check_locking_state(
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environ=environ, action=action,
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repo=repo_name, user_id=user.user_id
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)
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# store the make_lock for later evaluation in hooks
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extras.update({'make_lock': make_lock,
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'locked_by': locked_by})
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fix_PATH()
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log.debug('HOOKS extras is %s', extras)
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baseui = make_ui('db')
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self.__inject_extras(repo_path, baseui, extras)
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try:
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log.info('%s action on Mercurial repo "%s" by "%s" from %s',
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action, str_repo_name, safe_str(username), ip_addr)
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app = self.__make_app(repo_path, baseui, extras)
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return app(environ, start_response)
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except RepoError as e:
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if str(e).find('not found') != -1:
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return HTTPNotFound()(environ, start_response)
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except HTTPLockedRC as e:
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_code = CONFIG.get('lock_ret_code')
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log.debug('Repository LOCKED ret code %s!', _code)
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return e(environ, start_response)
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except Exception:
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log.error(traceback.format_exc())
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return HTTPInternalServerError()(environ, start_response)
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finally:
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# invalidate cache on push
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if action == 'push':
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self._invalidate_cache(repo_name)
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def __make_app(self, repo_name, baseui, extras):
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"""
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Make an wsgi application using hgweb, and inject generated baseui
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instance, additionally inject some extras into ui object
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"""
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return hgweb_mod.hgweb(repo_name, name=repo_name, baseui=baseui)
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def __get_repository(self, environ):
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"""
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Gets repository name out of PATH_INFO header
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:param environ: environ where PATH_INFO is stored
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"""
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try:
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environ['PATH_INFO'] = self._get_by_id(environ['PATH_INFO'])
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repo_name = '/'.join(environ['PATH_INFO'].split('/')[1:])
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if repo_name.endswith('/'):
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repo_name = repo_name.rstrip('/')
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except Exception:
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log.error(traceback.format_exc())
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raise
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return repo_name
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def __get_user(self, username):
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return User.get_by_username(username)
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def __get_action(self, environ):
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"""
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Maps mercurial request commands into a clone,pull or push command.
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This should always return a valid command string
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:param environ:
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"""
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mapping = {'changegroup': 'pull',
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'changegroupsubset': 'pull',
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'stream_out': 'pull',
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'listkeys': 'pull',
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'unbundle': 'push',
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'pushkey': 'push', }
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for qry in environ['QUERY_STRING'].split('&'):
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if qry.startswith('cmd'):
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cmd = qry.split('=')[-1]
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if cmd in mapping:
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return mapping[cmd]
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return 'pull'
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raise Exception('Unable to detect pull/push action !!'
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'Are you using non standard command or client ?')
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def __inject_extras(self, repo_path, baseui, extras={}):
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"""
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Injects some extra params into baseui instance
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also overwrites global settings with those takes from local hgrc file
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:param baseui: baseui instance
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:param extras: dict with extra params to put into baseui
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"""
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hgrc = os.path.join(repo_path, '.hg', 'hgrc')
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repoui = make_ui('file', hgrc, False)
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if repoui:
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#overwrite our ui instance with the section from hgrc file
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for section in ui_sections:
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for k, v in repoui.configitems(section):
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baseui.setconfig(section, k, v)
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_set_extras(extras)
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