patched basic auth function to overcome git issues with proxy that doesn't send both username and password. ref #586

rhodecode/lib/base.py

@@ -1,303 +1,319
 """The base Controller API
 
 Provides the BaseController class for subclassing.
 """
 import logging
 import time
 import traceback
 
 from paste.auth.basic import AuthBasicAuthenticator
 from paste.httpexceptions import HTTPUnauthorized, HTTPForbidden
-from webob.exc import HTTPClientError
-from paste.httpheaders import WWW_AUTHENTICATE
+from paste.httpheaders import WWW_AUTHENTICATE, AUTHORIZATION
 
 from pylons import config, tmpl_context as c, request, session, url
 from pylons.controllers import WSGIController
 from pylons.controllers.util import redirect
 from pylons.templating import render_mako as render
 
 from rhodecode import __version__, BACKENDS
 
 from rhodecode.lib.utils2 import str2bool, safe_unicode, AttributeDict,\
     safe_str
 from rhodecode.lib.auth import AuthUser, get_container_username, authfunc,\
     HasPermissionAnyMiddleware, CookieStoreWrapper
 from rhodecode.lib.utils import get_repo_slug, invalidate_cache
 from rhodecode.model import meta
 
 from rhodecode.model.db import Repository, RhodeCodeUi, User
 from rhodecode.model.notification import NotificationModel
 from rhodecode.model.scm import ScmModel
 from rhodecode.model.meta import Session
 
 log = logging.getLogger(__name__)
 
 
 def _get_ip_addr(environ):
     proxy_key = 'HTTP_X_REAL_IP'
     proxy_key2 = 'HTTP_X_FORWARDED_FOR'
     def_key = 'REMOTE_ADDR'
 
     ip = environ.get(proxy_key2)
     if ip:
         return ip
 
     ip = environ.get(proxy_key)
 
     if ip:
         return ip
 
     ip = environ.get(def_key, '0.0.0.0')
     return ip
 
 
 def _get_access_path(environ):
     path = environ.get('PATH_INFO')
     org_req = environ.get('pylons.original_request')
     if org_req:
         path = org_req.environ.get('PATH_INFO')
     return path
 
 
 class BasicAuth(AuthBasicAuthenticator):
 
     def __init__(self, realm, authfunc, auth_http_code=None):
         self.realm = realm
         self.authfunc = authfunc
         self._rc_auth_http_code = auth_http_code
 
     def build_authentication(self):
         head = WWW_AUTHENTICATE.tuples('Basic realm="%s"' % self.realm)
         if self._rc_auth_http_code and self._rc_auth_http_code == '403':
             # return 403 if alternative http return code is specified in
             # RhodeCode config
             return HTTPForbidden(headers=head)
         return HTTPUnauthorized(headers=head)
 
+    def authenticate(self, environ):
+        authorization = AUTHORIZATION(environ)
+        if not authorization:
+            return self.build_authentication()
+        (authmeth, auth) = authorization.split(' ', 1)
+        if 'basic' != authmeth.lower():
+            return self.build_authentication()
+        auth = auth.strip().decode('base64')
+        _parts = auth.split(':', 1)
+        if len(_parts) == 2:
+            username, password = _parts
+            if self.authfunc(environ, username, password):
+                return username
+        return self.build_authentication()
+
+    __call__ = authenticate
+
 
 class BaseVCSController(object):
 
     def __init__(self, application, config):
         self.application = application
         self.config = config
         # base path of repo locations
         self.basepath = self.config['base_path']
         #authenticate this mercurial request using authfunc
         self.authenticate = BasicAuth('', authfunc,
                                       config.get('auth_ret_code'))
         self.ipaddr = '0.0.0.0'
 
     def _handle_request(self, environ, start_response):
         raise NotImplementedError()
 
     def _get_by_id(self, repo_name):
         """
         Get's a special pattern _<ID> from clone url and tries to replace it
         with a repository_name for support of _<ID> non changable urls
 
         :param repo_name:
         """
         try:
             data = repo_name.split('/')
             if len(data) >= 2:
                 by_id = data[1].split('_')
                 if len(by_id) == 2 and by_id[1].isdigit():
                     _repo_name = Repository.get(by_id[1]).repo_name
                     data[1] = _repo_name
         except:
             log.debug('Failed to extract repo_name from id %s' % (
                       traceback.format_exc()
                       )
             )
 
         return '/'.join(data)
 
     def _invalidate_cache(self, repo_name):
         """
         Set's cache for this repository for invalidation on next access
 
         :param repo_name: full repo name, also a cache key
         """
         invalidate_cache('get_repo_cached_%s' % repo_name)
 
     def _check_permission(self, action, user, repo_name):
         """
         Checks permissions using action (push/pull) user and repository
         name
 
         :param action: push or pull action
         :param user: user instance
         :param repo_name: repository name
         """
         if action == 'push':
             if not HasPermissionAnyMiddleware('repository.write',
                                               'repository.admin')(user,
                                                                   repo_name):
                 return False
 
         else:
             #any other action need at least read permission
             if not HasPermissionAnyMiddleware('repository.read',
                                               'repository.write',
                                               'repository.admin')(user,
                                                                   repo_name):
                 return False
 
         return True
 
     def _get_ip_addr(self, environ):
         return _get_ip_addr(environ)
 
     def _check_ssl(self, environ, start_response):
         """
         Checks the SSL check flag and returns False if SSL is not present
         and required True otherwise
         """
         org_proto = environ['wsgi._org_proto']
         #check if we have SSL required  ! if not it's a bad request !
         require_ssl = str2bool(RhodeCodeUi.get_by_key('push_ssl').ui_value)
         if require_ssl and org_proto == 'http':
             log.debug('proto is %s and SSL is required BAD REQUEST !'
                       % org_proto)
             return False
         return True
 
     def _check_locking_state(self, environ, action, repo, user_id):
         """
         Checks locking on this repository, if locking is enabled and lock is
         present returns a tuple of make_lock, locked, locked_by.
         make_lock can have 3 states None (do nothing) True, make lock
         False release lock, This value is later propagated to hooks, which
         do the locking. Think about this as signals passed to hooks what to do.
 
         """
         locked = False  # defines that locked error should be thrown to user
         make_lock = None
         repo = Repository.get_by_repo_name(repo)
         user = User.get(user_id)
 
         # this is kind of hacky, but due to how mercurial handles client-server
         # server see all operation on changeset; bookmarks, phases and
         # obsolescence marker in different transaction, we don't want to check
         # locking on those
         obsolete_call = environ['QUERY_STRING'] in ['cmd=listkeys',]
         locked_by = repo.locked
         if repo and repo.enable_locking and not obsolete_call:
             if action == 'push':
                 #check if it's already locked !, if it is compare users
                 user_id, _date = repo.locked
                 if user.user_id == user_id:
                     log.debug('Got push from user %s, now unlocking' % (user))
                     # unlock if we have push from user who locked
                     make_lock = False
                 else:
                     # we're not the same user who locked, ban with 423 !
                     locked = True
             if action == 'pull':
                 if repo.locked[0] and repo.locked[1]:
                     locked = True
                 else:
                     log.debug('Setting lock on repo %s by %s' % (repo, user))
                     make_lock = True
 
         else:
             log.debug('Repository %s do not have locking enabled' % (repo))
         log.debug('FINAL locking values make_lock:%s,locked:%s,locked_by:%s'
                   % (make_lock, locked, locked_by))
         return make_lock, locked, locked_by
 
     def __call__(self, environ, start_response):
         start = time.time()
         try:
             return self._handle_request(environ, start_response)
         finally:
             log = logging.getLogger('rhodecode.' + self.__class__.__name__)
             log.debug('Request time: %.3fs' % (time.time() - start))
             meta.Session.remove()
 
 
 class BaseController(WSGIController):
 
     def __before__(self):
         c.rhodecode_version = __version__
         c.rhodecode_instanceid = config.get('instance_id')
         c.rhodecode_name = config.get('rhodecode_title')
         c.use_gravatar = str2bool(config.get('use_gravatar'))
         c.ga_code = config.get('rhodecode_ga_code')
         # Visual options
         c.visual = AttributeDict({})
         c.visual.show_public_icon = str2bool(config.get('rhodecode_show_public_icon'))
         c.visual.show_private_icon = str2bool(config.get('rhodecode_show_private_icon'))
         c.visual.stylify_metatags = str2bool(config.get('rhodecode_stylify_metatags'))
 
         c.repo_name = get_repo_slug(request)
         c.backends = BACKENDS.keys()
         c.unread_notifications = NotificationModel()\
                         .get_unread_cnt_for_user(c.rhodecode_user.user_id)
         self.cut_off_limit = int(config.get('cut_off_limit'))
 
         self.sa = meta.Session
         self.scm_model = ScmModel(self.sa)
         self.ip_addr = ''
 
     def __call__(self, environ, start_response):
         """Invoke the Controller"""
         # WSGIController.__call__ dispatches to the Controller method
         # the request is routed to. This routing information is
         # available in environ['pylons.routes_dict']
         start = time.time()
         try:
             self.ip_addr = _get_ip_addr(environ)
             # make sure that we update permissions each time we call controller
             api_key = request.GET.get('api_key')
             cookie_store = CookieStoreWrapper(session.get('rhodecode_user'))
             user_id = cookie_store.get('user_id', None)
             username = get_container_username(environ, config)
             auth_user = AuthUser(user_id, api_key, username)
             request.user = auth_user
             self.rhodecode_user = c.rhodecode_user = auth_user
             if not self.rhodecode_user.is_authenticated and \
                        self.rhodecode_user.user_id is not None:
                 self.rhodecode_user.set_authenticated(
                     cookie_store.get('is_authenticated')
                 )
             log.info('IP: %s User: %s accessed %s' % (
                self.ip_addr, auth_user, safe_unicode(_get_access_path(environ)))
             )
             return WSGIController.__call__(self, environ, start_response)
         finally:
             log.info('IP: %s Request to %s time: %.3fs' % (
                 _get_ip_addr(environ),
                 safe_unicode(_get_access_path(environ)), time.time() - start)
             )
             meta.Session.remove()
 
 
 class BaseRepoController(BaseController):
     """
     Base class for controllers responsible for loading all needed data for
     repository loaded items are
 
     c.rhodecode_repo: instance of scm repository
     c.rhodecode_db_repo: instance of db
     c.repository_followers: number of followers
     c.repository_forks: number of forks
     """
 
     def __before__(self):
         super(BaseRepoController, self).__before__()
         if c.repo_name:
 
             dbr = c.rhodecode_db_repo = Repository.get_by_repo_name(c.repo_name)
             c.rhodecode_repo = c.rhodecode_db_repo.scm_instance
 
             if c.rhodecode_repo is None:
                 log.error('%s this repository is present in database but it '
                           'cannot be created as an scm instance', c.repo_name)
 
                 redirect(url('home'))
 
             # some globals counter for menu
             c.repository_followers = self.scm_model.get_followers(dbr)
             c.repository_forks = self.scm_model.get_forks(dbr)
             c.repository_pull_requests = self.scm_model.get_pull_requests(dbr)