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# -*- coding: utf-8 -*-
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"""
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rhodecode.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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:created_on: Apr 28, 2010
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:author: marcink
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:copyright: (C) 2010-2012 Marcin Kuzminski <marcin@python-works.com>
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:license: GPLv3, see COPYING for more details.
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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 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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import os
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import logging
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import traceback
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import urllib
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from mercurial.error import RepoError
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from mercurial.hgweb import hgweb_mod
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from paste.httpheaders import REMOTE_USER, AUTH_TYPE
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from rhodecode.lib.utils2 import safe_str
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from rhodecode.lib.base import BaseVCSController
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from rhodecode.lib.auth import get_container_username
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from rhodecode.lib.utils import make_ui, is_valid_repo, ui_sections
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from rhodecode.model.db import User
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from webob.exc import HTTPNotFound, HTTPForbidden, HTTPInternalServerError
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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 HG %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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ipaddr = self._get_ip_addr(environ)
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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:
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return HTTPInternalServerError()(environ, start_response)
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# quick check if that dir exists...
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if is_valid_repo(repo_name, self.basepath) is False:
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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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anonymous_perm = self._check_permission(action, anonymous_user,
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repo_name)
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if anonymous_perm is not True or anonymous_user.active is False:
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if anonymous_perm is not True:
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log.debug('Not enough credentials to access this '
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'repository as anonymous user')
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if anonymous_user.active is False:
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log.debug('Anonymous access is disabled, running '
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'authentication')
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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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# Attempting to retrieve username from the container
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username = get_container_username(environ, self.config)
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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['rhodecode_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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if action in ['pull', 'push']:
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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:
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log.error(traceback.format_exc())
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return HTTPInternalServerError()(environ,
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start_response)
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#check permissions for this repository
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perm = self._check_permission(action, user, repo_name)
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if perm is not True:
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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 rhodecode
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extras = {
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'ip': ipaddr,
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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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}
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#======================================================================
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# MERCURIAL REQUEST HANDLING
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#======================================================================
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repo_path = os.path.join(safe_str(self.basepath), safe_str(repo_name))
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log.debug('Repository path is %s' % repo_path)
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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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# invalidate cache on push
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if action == 'push':
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self._invalidate_cache(repo_name)
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log.info('%s action on HG repo "%s"' % (action, repo_name))
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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, 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 Exception:
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log.error(traceback.format_exc())
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return HTTPInternalServerError()(environ, start_response)
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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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Get's 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:
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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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else:
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return 'pull'
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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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# make our hgweb quiet so it doesn't print output
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baseui.setconfig('ui', 'quiet', 'true')
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#inject some additional parameters that will be available in ui
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#for hooks
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for k, v in extras.items():
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baseui.setconfig('rhodecode_extras', k, v)
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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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