#!/usr/bin/env python # encoding: utf-8 # middleware to handle mercurial api calls # Copyright (C) 2009-2010 Marcin Kuzminski # # This program is free software: you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by # the Free Software Foundation, either version 3 of the License, or # (at your option) any later version. # # 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 General Public License # along with this program. If not, see . """ Created on 2010-04-28 @author: marcink SimpleHG middleware for handling mercurial protocol request (push/clone etc.) It's implemented with basic auth function """ from mercurial.error import RepoError from mercurial.hgweb import hgweb from mercurial.hgweb.request import wsgiapplication from paste.auth.basic import AuthBasicAuthenticator from paste.httpheaders import REMOTE_USER, AUTH_TYPE from rhodecode.lib.auth import authfunc, HasPermissionAnyMiddleware from rhodecode.lib.utils import make_ui, invalidate_cache, \ check_repo_fast, ui_sections from rhodecode.model.user import UserModel from webob.exc import HTTPNotFound, HTTPForbidden, HTTPInternalServerError import logging import os import traceback log = logging.getLogger(__name__) def is_mercurial(environ): """ Returns True if request's target is mercurial server - header ``HTTP_ACCEPT`` of such request would start with ``application/mercurial``. """ http_accept = environ.get('HTTP_ACCEPT') if http_accept and http_accept.startswith('application/mercurial'): return True return False class SimpleHg(object): def __init__(self, application, config): self.application = application self.config = config #authenticate this mercurial request using authfunc self.authenticate = AuthBasicAuthenticator('', authfunc) self.ipaddr = '0.0.0.0' self.repository = None self.username = None self.action = None def __call__(self, environ, start_response): if not is_mercurial(environ): return self.application(environ, start_response) proxy_key = 'HTTP_X_REAL_IP' def_key = 'REMOTE_ADDR' self.ipaddr = environ.get(proxy_key, environ.get(def_key, '0.0.0.0')) # skip passing error to error controller environ['pylons.status_code_redirect'] = True #=================================================================== # AUTHENTICATE THIS MERCURIAL REQUEST #=================================================================== username = REMOTE_USER(environ) if not username: self.authenticate.realm = str(self.config['rhodecode_realm']) result = self.authenticate(environ) if isinstance(result, str): AUTH_TYPE.update(environ, 'basic') REMOTE_USER.update(environ, result) else: return result.wsgi_application(environ, start_response) #======================================================================= # GET REPOSITORY #======================================================================= try: repo_name = '/'.join(environ['PATH_INFO'].split('/')[1:]) if repo_name.endswith('/'): repo_name = repo_name.rstrip('/') self.repository = repo_name except: log.error(traceback.format_exc()) return HTTPInternalServerError()(environ, start_response) #=================================================================== # CHECK PERMISSIONS FOR THIS REQUEST #=================================================================== self.action = self.__get_action(environ) if self.action: username = self.__get_environ_user(environ) try: user = self.__get_user(username) self.username = user.username except: log.error(traceback.format_exc()) return HTTPInternalServerError()(environ, start_response) #check permissions for this repository if self.action == 'push': if not HasPermissionAnyMiddleware('repository.write', 'repository.admin')\ (user, repo_name): return HTTPForbidden()(environ, start_response) else: #any other action need at least read permission if not HasPermissionAnyMiddleware('repository.read', 'repository.write', 'repository.admin')\ (user, repo_name): return HTTPForbidden()(environ, start_response) self.extras = {'ip':self.ipaddr, 'username':self.username, 'action':self.action, 'repository':self.repository} #=================================================================== # MERCURIAL REQUEST HANDLING #=================================================================== environ['PATH_INFO'] = '/'#since we wrap into hgweb, reset the path self.baseui = make_ui('db') self.basepath = self.config['base_path'] self.repo_path = os.path.join(self.basepath, repo_name) #quick check if that dir exists... if check_repo_fast(repo_name, self.basepath): return HTTPNotFound()(environ, start_response) try: app = wsgiapplication(self.__make_app) except RepoError, e: if str(e).find('not found') != -1: return HTTPNotFound()(environ, start_response) except Exception: log.error(traceback.format_exc()) return HTTPInternalServerError()(environ, start_response) #invalidate cache on push if self.action == 'push': self.__invalidate_cache(repo_name) return app(environ, start_response) def __make_app(self): hgserve = hgweb(str(self.repo_path), baseui=self.baseui) return self.__load_web_settings(hgserve, self.extras) def __get_environ_user(self, environ): return environ.get('REMOTE_USER') def __get_user(self, username): return UserModel().get_by_username(username, cache=True) def __get_action(self, environ): """ Maps mercurial request commands into a clone,pull or push command. This should always return a valid command string :param environ: """ mapping = {'changegroup': 'pull', 'changegroupsubset': 'pull', 'stream_out': 'pull', 'listkeys': 'pull', 'unbundle': 'push', 'pushkey': 'push', } for qry in environ['QUERY_STRING'].split('&'): if qry.startswith('cmd'): cmd = qry.split('=')[-1] if mapping.has_key(cmd): return mapping[cmd] else: return cmd def __invalidate_cache(self, repo_name): """we know that some change was made to repositories and we should invalidate the cache to see the changes right away but only for push requests""" invalidate_cache('get_repo_cached_%s' % repo_name) def __load_web_settings(self, hgserve, extras={}): #set the global ui for hgserve instance passed hgserve.repo.ui = self.baseui hgrc = os.path.join(self.repo_path, '.hg', 'hgrc') #inject some additional parameters that will be available in ui #for hooks for k, v in extras.items(): hgserve.repo.ui.setconfig('rhodecode_extras', k, v) repoui = make_ui('file', hgrc, False) if repoui: #overwrite our ui instance with the section from hgrc file for section in ui_sections: for k, v in repoui.configitems(section): hgserve.repo.ui.setconfig(section, k, v) return hgserve