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# -*- coding: utf-8 -*-
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"""
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rhodecode.lib.middleware.simplegit
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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SimpleGit middleware for handling git protocol request (push/clone etc.)
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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) 2009-2010 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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from dulwich import server as dulserver
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class SimpleGitUploadPackHandler(dulserver.UploadPackHandler):
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def handle(self):
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write = lambda x: self.proto.write_sideband(1, x)
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graph_walker = dulserver.ProtocolGraphWalker(self,
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self.repo.object_store,
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self.repo.get_peeled)
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objects_iter = self.repo.fetch_objects(
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graph_walker.determine_wants, graph_walker, self.progress,
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get_tagged=self.get_tagged)
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# Do they want any objects?
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if len(objects_iter) == 0:
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return
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self.progress("counting objects: %d, done.\n" % len(objects_iter))
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dulserver.write_pack_data(dulserver.ProtocolFile(None, write),
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objects_iter, len(objects_iter))
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messages = []
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messages.append('thank you for using rhodecode')
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for msg in messages:
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self.progress(msg + "\n")
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# we are done
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self.proto.write("0000")
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dulserver.DEFAULT_HANDLERS = {
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'git-upload-pack': SimpleGitUploadPackHandler,
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'git-receive-pack': dulserver.ReceivePackHandler,
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}
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from dulwich.repo import Repo
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from dulwich.web import HTTPGitApplication
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from paste.auth.basic import AuthBasicAuthenticator
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from paste.httpheaders import REMOTE_USER, AUTH_TYPE
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from rhodecode.lib import safe_str
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from rhodecode.lib.auth import authfunc, HasPermissionAnyMiddleware
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from rhodecode.lib.utils import invalidate_cache, check_repo_fast
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from rhodecode.model.user import UserModel
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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_git(environ):
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"""Returns True if request's target is git server.
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``HTTP_USER_AGENT`` would then have git client version given.
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:param environ:
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"""
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http_user_agent = environ.get('HTTP_USER_AGENT')
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if http_user_agent and http_user_agent.startswith('git'):
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return True
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return False
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class SimpleGit(object):
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def __init__(self, application, config):
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self.application = application
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self.config = config
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#authenticate this git request using
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self.authenticate = AuthBasicAuthenticator('', authfunc)
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self.ipaddr = '0.0.0.0'
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self.repo_name = None
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self.username = None
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self.action = None
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def __call__(self, environ, start_response):
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if not is_git(environ):
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return self.application(environ, start_response)
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proxy_key = 'HTTP_X_REAL_IP'
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def_key = 'REMOTE_ADDR'
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self.ipaddr = environ.get(proxy_key, environ.get(def_key, '0.0.0.0'))
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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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self.action = self.__get_action(environ)
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try:
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#==================================================================
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# GET REPOSITORY NAME
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#==================================================================
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self.repo_name = self.__get_repository(environ)
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except:
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return HTTPInternalServerError()(environ, start_response)
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#======================================================================
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# CHECK ANONYMOUS PERMISSION
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#======================================================================
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if self.action in ['pull', 'push']:
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anonymous_user = self.__get_user('default')
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self.username = anonymous_user.username
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anonymous_perm = self.__check_permission(self.action,
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anonymous_user,
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self.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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if not REMOTE_USER(environ):
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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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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 FROM
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# BASIC AUTH
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#==============================================================
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if self.action in ['pull', 'push']:
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username = REMOTE_USER(environ)
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try:
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user = self.__get_user(username)
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self.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(self.action, user,
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self.repo_name)
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if perm is not True:
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return HTTPForbidden()(environ, start_response)
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self.extras = {'ip': self.ipaddr,
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'username': self.username,
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'action': self.action,
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'repository': self.repo_name}
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#===================================================================
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# GIT REQUEST HANDLING
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#===================================================================
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self.basepath = self.config['base_path']
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self.repo_path = os.path.join(self.basepath, self.repo_name)
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#quick check if that dir exists...
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if check_repo_fast(self.repo_name, self.basepath):
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return HTTPNotFound()(environ, start_response)
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try:
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app = self.__make_app()
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except:
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log.error(traceback.format_exc())
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return HTTPInternalServerError()(environ, start_response)
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#invalidate cache on push
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if self.action == 'push':
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self.__invalidate_cache(self.repo_name)
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return app(environ, start_response)
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def __make_app(self):
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_d = {'/' + self.repo_name: Repo(self.repo_path)}
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backend = dulserver.DictBackend(_d)
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gitserve = HTTPGitApplication(backend)
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return gitserve
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def __check_permission(self, action, user, repo_name):
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"""Checks permissions using action (push/pull) user and repository
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name
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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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if action == 'push':
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if not HasPermissionAnyMiddleware('repository.write',
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'repository.admin')(user,
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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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if not HasPermissionAnyMiddleware('repository.read',
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'repository.write',
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'repository.admin')(user,
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repo_name):
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return False
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return True
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def __get_repository(self, environ):
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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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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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repo_name = repo_name.split('/')[0]
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return repo_name
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def __get_user(self, username):
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return UserModel().get_by_username(username, cache=True)
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def __get_action(self, environ):
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"""Maps git request commands into a pull or push command.
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:param environ:
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"""
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service = environ['QUERY_STRING'].split('=')
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if len(service) > 1:
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service_cmd = service[1]
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mapping = {'git-receive-pack': 'push',
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'git-upload-pack': 'pull',
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}
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return mapping.get(service_cmd,
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service_cmd if service_cmd else 'other')
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else:
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return 'other'
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def __invalidate_cache(self, repo_name):
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"""we know that some change was made to repositories and we should
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invalidate the cache to see the changes right away but only for
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push requests"""
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invalidate_cache('get_repo_cached_%s' % repo_name)
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