# -*- coding: utf-8 -*- """ rhodecode.lib.middleware.simplehg ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ SimpleHG middleware for handling mercurial protocol request (push/clone etc.). It's implemented with basic auth function :created_on: Apr 28, 2010 :author: marcink :copyright: (C) 2010-2012 Marcin Kuzminski :license: GPLv3, see COPYING for more details. """ # 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 . import os import logging import traceback import urllib from mercurial.error import RepoError from mercurial.hgweb import hgweb_mod from paste.httpheaders import REMOTE_USER, AUTH_TYPE from rhodecode.lib import safe_str from rhodecode.lib.base import BaseVCSController from rhodecode.lib.auth import get_container_username from rhodecode.lib.utils import make_ui, is_valid_repo, ui_sections from rhodecode.model.db import User from webob.exc import HTTPNotFound, HTTPForbidden, HTTPInternalServerError 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') path_info = environ['PATH_INFO'] if http_accept and http_accept.startswith('application/mercurial'): ishg_path = True else: ishg_path = False log.debug('pathinfo: %s detected as HG %s' % ( path_info, ishg_path) ) return ishg_path class SimpleHg(BaseVCSController): def _handle_request(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' 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 #====================================================================== # EXTRACT REPOSITORY NAME FROM ENV #====================================================================== try: repo_name = environ['REPO_NAME'] = self.__get_repository(environ) log.debug('Extracted repo name is %s' % repo_name) except: return HTTPInternalServerError()(environ, start_response) #====================================================================== # GET ACTION PULL or PUSH #====================================================================== action = self.__get_action(environ) #====================================================================== # CHECK ANONYMOUS PERMISSION #====================================================================== if action in ['pull', 'push']: anonymous_user = self.__get_user('default') username = anonymous_user.username anonymous_perm = self._check_permission(action, anonymous_user, repo_name) if anonymous_perm is not True or anonymous_user.active is False: if anonymous_perm is not True: log.debug('Not enough credentials to access this ' 'repository as anonymous user') if anonymous_user.active is False: log.debug('Anonymous access is disabled, running ' 'authentication') #============================================================== # DEFAULT PERM FAILED OR ANONYMOUS ACCESS IS DISABLED SO WE # NEED TO AUTHENTICATE AND ASK FOR AUTH USER PERMISSIONS #============================================================== # Attempting to retrieve username from the container username = get_container_username(environ, self.config) # If not authenticated by the container, running basic auth if not username: self.authenticate.realm = \ safe_str(self.config['rhodecode_realm']) result = self.authenticate(environ) if isinstance(result, str): AUTH_TYPE.update(environ, 'basic') REMOTE_USER.update(environ, result) username = result else: return result.wsgi_application(environ, start_response) #============================================================== # CHECK PERMISSIONS FOR THIS REQUEST USING GIVEN USERNAME #============================================================== if action in ['pull', 'push']: try: user = self.__get_user(username) if user is None or not user.active: return HTTPForbidden()(environ, start_response) username = user.username except: log.error(traceback.format_exc()) return HTTPInternalServerError()(environ, start_response) #check permissions for this repository perm = self._check_permission(action, user, repo_name) if perm is not True: return HTTPForbidden()(environ, start_response) # extras are injected into mercurial UI object and later available # in hg hooks executed by rhodecode extras = { 'ip': ipaddr, 'username': username, 'action': action, 'repository': repo_name } #====================================================================== # MERCURIAL REQUEST HANDLING #====================================================================== repo_path = os.path.join(safe_str(self.basepath), safe_str(repo_name)) log.debug('Repository path is %s' % repo_path) baseui = make_ui('db') self.__inject_extras(repo_path, baseui, extras) # quick check if that dir exists... if is_valid_repo(repo_name, self.basepath) is False: return HTTPNotFound()(environ, start_response) try: # invalidate cache on push if action == 'push': self._invalidate_cache(repo_name) log.info('%s action on HG repo "%s"' % (action, repo_name)) app = self.__make_app(repo_path, baseui, extras) return app(environ, start_response) 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) def __make_app(self, repo_name, baseui, extras): """ Make an wsgi application using hgweb, and inject generated baseui instance, additionally inject some extras into ui object """ return hgweb_mod.hgweb(repo_name, name=repo_name, baseui=baseui) def __get_repository(self, environ): """ Get's repository name out of PATH_INFO header :param environ: environ where PATH_INFO is stored """ try: environ['PATH_INFO'] = self._get_by_id(environ['PATH_INFO']) repo_name = '/'.join(environ['PATH_INFO'].split('/')[1:]) if repo_name.endswith('/'): repo_name = repo_name.rstrip('/') except: log.error(traceback.format_exc()) raise return repo_name def __get_user(self, username): return User.get_by_username(username) 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 cmd in mapping: return mapping[cmd] else: return 'pull' def __inject_extras(self, repo_path, baseui, extras={}): """ Injects some extra params into baseui instance also overwrites global settings with those takes from local hgrc file :param baseui: baseui instance :param extras: dict with extra params to put into baseui """ hgrc = os.path.join(repo_path, '.hg', 'hgrc') # make our hgweb quiet so it doesn't print output baseui.setconfig('ui', 'quiet', 'true') #inject some additional parameters that will be available in ui #for hooks for k, v in extras.items(): baseui.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): baseui.setconfig(section, k, v)