Source code for cubicweb.pyramid.core

# copyright 2017 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
# copyright 2014-2016 UNLISH S.A.S. (Montpellier, FRANCE), all rights reserved.
# contact --
# This file is part of CubicWeb.
# CubicWeb is free software: you can redistribute it and/or modify it under the
# terms of the GNU Lesser General Public License as published by the Free
# Software Foundation, either version 2.1 of the License, or (at your option)
# any later version.
# CubicWeb 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 Lesser General Public License for more
# details.
# You should have received a copy of the GNU Lesser General Public License along
# with CubicWeb.  If not, see <>.

"""Binding of CubicWeb connection to Pyramid request."""

import itertools

from contextlib import contextmanager
from cgi import FieldStorage

import rql

from cubicweb.web.request import CubicWebRequestBase

import cubicweb
import cubicweb.web
from cubicweb.server import session as cwsession

from pyramid import httpexceptions

from cubicweb.pyramid import tools

import logging

log = logging.getLogger(__name__)

class Connection(cwsession.Connection):
    """A specialised Connection that access the session data through a

    This behavior makes sure the actual session data is not loaded until
    actually accessed.

    def __init__(self, session, *args, **kw):
        super().__init__(session._repo, session._user, *args, **kw)
        self.session = session
        self.lang = session._cached_lang

    def _get_session_data(self):

    def _set_session_data(self, data):

    _session_data = property(_get_session_data, _set_session_data)

class Session:
    """A Session that access the session data through a property.

    Along with :class:`Connection`, it avoid any load of the pyramid session
    data until it is actually accessed.

    def __init__(self, pyramid_request, user, repo):
        self._pyramid_request = pyramid_request
        self._user = user
        self._repo = repo

    def anonymous_session(self):
        # XXX for now, anonymous_user only exists in webconfig (and testconfig).
        # It will only be present inside all-in-one instance.
        # there is plan to move it down to global config.
        if not hasattr(self._repo.config, "anonymous_user"):
            # not a web or test config, no anonymous user
            return False
        return self._user.login == self._repo.config.anonymous_user()[0]

    def get_data(self):
        if not getattr(self, "_protect_data_access", False):
            self._data_accessed = True
            return self._pyramid_request.session

    def set_data(self, data):
        if getattr(self, "_data_accessed", False):

    data = property(get_data, set_data)

    def new_cnx(self):
        self._protect_data_access = True
            return Connection(self)
            self._protect_data_access = False

def cw_headers(request):
    return itertools.chain(
            [(k, item) for item in v]
            for k, v in request.cw_request.headers_out.getAllRawHeaders()

[docs]@contextmanager def cw_to_pyramid(request): """Context manager to wrap a call to the cubicweb API. All CW exceptions will be transformed into their pyramid equivalent. When needed, some CW reponse bits may be converted too (mainly headers)""" try: yield except cubicweb.web.Redirect as ex: assert 300 <= ex.status < 400 raise httpexceptions.status_map[ex.status]( ex.location, headers=cw_headers(request) ) except cubicweb.web.Unauthorized: raise httpexceptions.HTTPForbidden( request.cw_request._( "You're not authorized to access this page. " "If you think you should, please contact the site " "administrator." ), headers=cw_headers(request), ) except cubicweb.web.Forbidden: raise httpexceptions.HTTPForbidden( request.cw_request._( "This action is forbidden. " "If you think it should be allowed, please contact the site " "administrator." ), headers=cw_headers(request), ) except (rql.BadRQLQuery, cubicweb.web.RequestError): raise
[docs]class CubicWebPyramidRequest(CubicWebRequestBase): """A CubicWeb request that only wraps a pyramid request. :param request: A pyramid request """ def __init__(self, request): self._request = request self.path = request.upath_info vreg = request.registry["cubicweb.registry"] post = request.params.mixed() headers_in = request.headers super().__init__(vreg, post, headers=headers_in) self.content = request.body_file_seekable
[docs] def setup_params(self, params): self.form = {} for param, val in params.items(): if param in self.no_script_form_params and val: val = self.no_script_form_param(param, val) if isinstance(val, FieldStorage) and val.file: val = (val.filename, val.file) if param == "_cwmsgid": self.set_message_id(val) else: self.form[param] = val
[docs] def relative_path(self, includeparams=True): path = self._request.path_info[1:] if includeparams and self._request.query_string: return f"{path}?{self._request.query_string}" return path
def instance_uri(self): return self._request.application_url def get_full_path(self): path = self._request.path if self._request.query_string: return f"{path}?{self._request.query_string}" return path
[docs] def http_method(self): return self._request.method
def _set_status_out(self, value): self._request.response.status_int = value def _get_status_out(self): return self._request.response.status_int status_out = property(_get_status_out, _set_status_out) @property def message(self): """Returns a '<br>' joined list of the cubicweb current message and the default pyramid flash queue messages. """ return "\n<br>\n".join( self._request.session.pop_flash() + self._request.session.pop_flash("cubicweb") ) def set_message(self, msg): self.reset_message() self._request.session.flash(msg, "cubicweb") def set_message_id(self, msgid): self.reset_message() self.set_message(self._request.session.pop(msgid, "")) def reset_message(self): self._request.session.pop_flash("cubicweb")
[docs]def render_view(request, vid, **kwargs): """Helper function to render a CubicWeb view. :param request: A pyramid request :param vid: A CubicWeb view id :param kwargs: Keyword arguments to select and instanciate the view :returns: The rendered view content """ vreg = request.registry["cubicweb.registry"] # XXX The select() function could, know how to handle a pyramid # request, and feed it directly to the views that supports it. # On the other hand, we could refine the View concept and decide it works # with a cnx, and never with a WebRequest with cw_to_pyramid(request): view = vreg["views"].select(vid, request.cw_request, **kwargs) view.set_stream() view.render() return view._stream.getvalue()
[docs]def _cw_cnx(request): """Obtains a cw session from a pyramid request The connection will be commited or rolled-back in a request finish callback (this is temporary, we should make use of the transaction manager in a later version). Not meant for direct use, use ``request.cw_cnx`` instead. :param request: A pyramid request :returns type: :class:`cubicweb.server.session.Connection` """ session = request.cw_session if session is None: return None cnx = session.new_cnx() def commit_state(cnx): return cnx.commit_state def cleanup(request): try: if request.exception is not None and not isinstance( request.exception, (httpexceptions.HTTPSuccessful, httpexceptions.HTTPRedirection), ): cnx.rollback() elif commit_state(cnx) == "uncommitable": cnx.rollback() else: cnx.commit() finally: cnx.__exit__(None, None, None) request.add_finished_callback(cleanup) cnx.__enter__() return cnx
[docs]def repo_connect(request, repo, eid): """A lightweight version of :meth:`cubicweb.server.repository.Repository.connect` that does not keep track of opened sessions, removing the need of closing them""" user, lang = tools.cached_build_user(repo, eid) session = Session(request, user, repo) session._cached_lang = lang tools.cnx_attach_entity(session, user) return session
[docs]def _cw_session(request): """Obtains a cw session from a pyramid request :param request: A pyramid request :returns type: :class:`cubicweb.server.session.Session` Not meant for direct use, use ``request.cw_session`` instead. """ repo = request.registry["cubicweb.repository"] if not request.authenticated_userid: eid = request.registry.get("cubicweb.anonymous_eid") if eid is None: return None session = repo_connect(request, repo, eid=eid) else: session = request._cw_cached_session return session
[docs]def _cw_request(request): """Obtains a CubicWeb request wrapper for the pyramid request. :param request: A pyramid request :return: A CubicWeb request :returns type: :class:`CubicWebPyramidRequest` Not meant for direct use, use ``request.cw_request`` instead. """ req = CubicWebPyramidRequest(request) cnx = request.cw_cnx if cnx is not None: req.set_cnx(request.cw_cnx) return req
[docs]def get_principals(login, request): """Returns the group names of the authenticated user. This function is meant to be used as an authentication policy callback. It also pre-open the cubicweb session and put it in request._cw_cached_session for later usage by :func:`_cw_session`. .. note:: If the default authentication policy is not used, make sure this function gets called by the active authentication policy. :param login: A cubicweb user eid :param request: A pyramid request :returns: A list of group names """ repo = request.registry["cubicweb.repository"] try: session = repo_connect(request, repo, eid=login) request._cw_cached_session = session except Exception: log.exception("Failed") raise with session.new_cnx() as cnx: with cnx.security_enabled(read=False): return { group for group, in cnx.execute( "Any GN WHERE U in_group G, G name GN, U eid %(userid)s", {"userid": login}, ) }
[docs]def includeme(config): """Enables the core features of Pyramid CubicWeb. Automatically called by the 'pyramid' command, or via ``config.include('cubicweb.pyramid.code')``. In the later case, the following registry entries must be defined first: 'cubicweb.config' A cubicweb 'config' instance. 'cubicweb.repository' The correponding cubicweb repository. 'cubicweb.registry' The vreg. """ repo = config.registry["cubicweb.repository"] with repo.internal_cnx() as cnx: login = config.registry["cubicweb.config"].anonymous_user()[0] if login is not None: try: config.registry["cubicweb.anonymous_eid"] = ( cnx.find("CWUser", login=login).one().eid ) except cubicweb.NoResultError: # Anonymous access is enabled, but anonymous user doesn't exist # which happens when we authorized anonymous access on a previously # private instance. from cubicweb.server import create_user anonlogin, anonpwd = config.registry["cubicweb.config"].anonymous_user() create_user(cnx, anonlogin, anonpwd, "guests") cnx.commit() config.registry["cubicweb.anonymous_eid"] = ( cnx.find("CWUser", login=login).one().eid ) config.add_request_method(_cw_session, name="cw_session", property=True, reify=True) config.add_request_method(_cw_cnx, name="cw_cnx", property=True, reify=True) config.add_request_method(_cw_request, name="cw_request", property=True, reify=True) cwcfg = config.registry["cubicweb.config"] for cube in cwcfg.cubes(): pkgname = f"cubicweb_{cube}" mod = __import__(pkgname) if hasattr(mod, "includeme"): config.include(pkgname)