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middleware.py
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# -*- coding: utf-8 -*-
# Copyright (C) 2010-2018 RhodeCode GmbH
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License, version 3
# (only), as published by the Free Software Foundation.
#
# 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 Affero General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
# This program is dual-licensed. If you wish to learn more about the
# RhodeCode Enterprise Edition, including its added features, Support services,
# and proprietary license terms, please see https://rhodecode.com/licenses/
import logging
import traceback
import collections
from paste.gzipper import make_gzip_middleware
from pyramid.wsgi import wsgiapp
from pyramid.authorization import ACLAuthorizationPolicy
from pyramid.config import Configurator
from pyramid.settings import asbool, aslist
from pyramid.httpexceptions import (
HTTPException, HTTPError, HTTPInternalServerError, HTTPFound, HTTPNotFound)
from pyramid.events import ApplicationCreated
from pyramid.renderers import render_to_response
from rhodecode.model import meta
from rhodecode.config import patches
from rhodecode.config import utils as config_utils
from rhodecode.config.environment import load_pyramid_environment
from rhodecode.lib.middleware.vcs import VCSMiddleware
from rhodecode.lib.vcs import VCSCommunicationError
from rhodecode.lib.exceptions import VCSServerUnavailable
from rhodecode.lib.middleware.appenlight import wrap_in_appenlight_if_enabled
from rhodecode.lib.middleware.https_fixup import HttpsFixup
from rhodecode.lib.celerylib.loader import configure_celery
from rhodecode.lib.plugins.utils import register_rhodecode_plugin
from rhodecode.lib.utils2 import aslist as rhodecode_aslist, AttributeDict
from rhodecode.subscribers import (
scan_repositories_if_enabled, write_js_routes_if_enabled,
write_metadata_if_needed, inject_app_settings)
log = logging.getLogger(__name__)
def is_http_error(response):
# error which should have traceback
return response.status_code > 499
def make_pyramid_app(global_config, **settings):
"""
Constructs the WSGI application based on Pyramid.
Specials:
* The application can also be integrated like a plugin via the call to
`includeme`. This is accompanied with the other utility functions which
are called. Changing this should be done with great care to not break
cases when these fragments are assembled from another place.
"""
sanitize_settings_and_apply_defaults(settings)
config = Configurator(settings=settings)
# Apply compatibility patches
patches.inspect_getargspec()
load_pyramid_environment(global_config, settings)
# Static file view comes first
includeme_first(config)
includeme(config)
pyramid_app = config.make_wsgi_app()
pyramid_app = wrap_app_in_wsgi_middlewares(pyramid_app, config)
pyramid_app.config = config
config.configure_celery(global_config['__file__'])
# creating the app uses a connection - return it after we are done
meta.Session.remove()
log.info('Pyramid app %s created and configured.', pyramid_app)
return pyramid_app
def not_found_view(request):
"""
This creates the view which should be registered as not-found-view to
pyramid.
"""
if not getattr(request, 'vcs_call', None):
# handle like regular case with our error_handler
return error_handler(HTTPNotFound(), request)
# handle not found view as a vcs call
settings = request.registry.settings
ae_client = getattr(request, 'ae_client', None)
vcs_app = VCSMiddleware(
HTTPNotFound(), request.registry, settings,
appenlight_client=ae_client)
return wsgiapp(vcs_app)(None, request)
def error_handler(exception, request):
import rhodecode
from rhodecode.lib import helpers
rhodecode_title = rhodecode.CONFIG.get('rhodecode_title') or 'RhodeCode'
base_response = HTTPInternalServerError()
# prefer original exception for the response since it may have headers set
if isinstance(exception, HTTPException):
base_response = exception
elif isinstance(exception, VCSCommunicationError):
base_response = VCSServerUnavailable()
if is_http_error(base_response):
log.exception(
'error occurred handling this request for path: %s', request.path)
error_explanation = base_response.explanation or str(base_response)
if base_response.status_code == 404:
error_explanation += " Or you don't have permission to access it."
c = AttributeDict()
c.error_message = base_response.status
c.error_explanation = error_explanation
c.visual = AttributeDict()
c.visual.rhodecode_support_url = (
request.registry.settings.get('rhodecode_support_url') or
request.route_url('rhodecode_support')
)
c.redirect_time = 0
c.rhodecode_name = rhodecode_title
if not c.rhodecode_name:
c.rhodecode_name = 'Rhodecode'
c.causes = []
if is_http_error(base_response):
c.causes.append('Server is overloaded.')
c.causes.append('Server database connection is lost.')
c.causes.append('Server expected unhandled error.')
if hasattr(base_response, 'causes'):
c.causes = base_response.causes
c.messages = helpers.flash.pop_messages(request=request)
c.traceback = traceback.format_exc()
response = render_to_response(
'/errors/error_document.mako', {'c': c, 'h': helpers}, request=request,
response=base_response)
return response
def includeme_first(config):
# redirect automatic browser favicon.ico requests to correct place
def favicon_redirect(context, request):
return HTTPFound(
request.static_path('rhodecode:public/images/favicon.ico'))
config.add_view(favicon_redirect, route_name='favicon')
config.add_route('favicon', '/favicon.ico')
def robots_redirect(context, request):
return HTTPFound(
request.static_path('rhodecode:public/robots.txt'))
config.add_view(robots_redirect, route_name='robots')
config.add_route('robots', '/robots.txt')
config.add_static_view(
'_static/deform', 'deform:static')
config.add_static_view(
'_static/rhodecode', path='rhodecode:public', cache_max_age=3600 * 24)
def includeme(config):
settings = config.registry.settings
# plugin information
config.registry.rhodecode_plugins = collections.OrderedDict()
config.add_directive(
'register_rhodecode_plugin', register_rhodecode_plugin)
config.add_directive('configure_celery', configure_celery)
if asbool(settings.get('appenlight', 'false')):
config.include('appenlight_client.ext.pyramid_tween')
# Includes which are required. The application would fail without them.
config.include('pyramid_mako')
config.include('pyramid_beaker')
config.include('rhodecode.lib.caches')
config.include('rhodecode.authentication')
config.include('rhodecode.integrations')
# apps
config.include('rhodecode.apps._base')
config.include('rhodecode.apps.ops')
config.include('rhodecode.apps.admin')
config.include('rhodecode.apps.channelstream')
config.include('rhodecode.apps.login')
config.include('rhodecode.apps.home')
config.include('rhodecode.apps.journal')
config.include('rhodecode.apps.repository')
config.include('rhodecode.apps.repo_group')
config.include('rhodecode.apps.user_group')
config.include('rhodecode.apps.search')
config.include('rhodecode.apps.user_profile')
config.include('rhodecode.apps.user_group_profile')
config.include('rhodecode.apps.my_account')
config.include('rhodecode.apps.svn_support')
config.include('rhodecode.apps.ssh_support')
config.include('rhodecode.apps.gist')
config.include('rhodecode.apps.debug_style')
config.include('rhodecode.tweens')
config.include('rhodecode.api')
config.add_route(
'rhodecode_support', 'https://rhodecode.com/help/', static=True)
config.add_translation_dirs('rhodecode:i18n/')
settings['default_locale_name'] = settings.get('lang', 'en')
# Add subscribers.
config.add_subscriber(inject_app_settings, ApplicationCreated)
config.add_subscriber(scan_repositories_if_enabled, ApplicationCreated)
config.add_subscriber(write_metadata_if_needed, ApplicationCreated)
config.add_subscriber(write_js_routes_if_enabled, ApplicationCreated)
# events
# TODO(marcink): this should be done when pyramid migration is finished
# config.add_subscriber(
# 'rhodecode.integrations.integrations_event_handler',
# 'rhodecode.events.RhodecodeEvent')
# request custom methods
config.add_request_method(
'rhodecode.lib.partial_renderer.get_partial_renderer',
'get_partial_renderer')
# Set the authorization policy.
authz_policy = ACLAuthorizationPolicy()
config.set_authorization_policy(authz_policy)
# Set the default renderer for HTML templates to mako.
config.add_mako_renderer('.html')
config.add_renderer(
name='json_ext',
factory='rhodecode.lib.ext_json_renderer.pyramid_ext_json')
# include RhodeCode plugins
includes = aslist(settings.get('rhodecode.includes', []))
for inc in includes:
config.include(inc)
# custom not found view, if our pyramid app doesn't know how to handle
# the request pass it to potential VCS handling ap
config.add_notfound_view(not_found_view)
if not settings.get('debugtoolbar.enabled', False):
# disabled debugtoolbar handle all exceptions via the error_handlers
config.add_view(error_handler, context=Exception)
# all errors including 403/404/50X
config.add_view(error_handler, context=HTTPError)
def wrap_app_in_wsgi_middlewares(pyramid_app, config):
"""
Apply outer WSGI middlewares around the application.
"""
settings = config.registry.settings
# enable https redirects based on HTTP_X_URL_SCHEME set by proxy
pyramid_app = HttpsFixup(pyramid_app, settings)
pyramid_app, _ae_client = wrap_in_appenlight_if_enabled(
pyramid_app, settings)
config.registry.ae_client = _ae_client
if settings['gzip_responses']:
pyramid_app = make_gzip_middleware(
pyramid_app, settings, compress_level=1)
# this should be the outer most middleware in the wsgi stack since
# middleware like Routes make database calls
def pyramid_app_with_cleanup(environ, start_response):
try:
return pyramid_app(environ, start_response)
finally:
# Dispose current database session and rollback uncommitted
# transactions.
meta.Session.remove()
# In a single threaded mode server, on non sqlite db we should have
# '0 Current Checked out connections' at the end of a request,
# if not, then something, somewhere is leaving a connection open
pool = meta.Base.metadata.bind.engine.pool
log.debug('sa pool status: %s', pool.status())
return pyramid_app_with_cleanup
def sanitize_settings_and_apply_defaults(settings):
"""
Applies settings defaults and does all type conversion.
We would move all settings parsing and preparation into this place, so that
we have only one place left which deals with this part. The remaining parts
of the application would start to rely fully on well prepared settings.
This piece would later be split up per topic to avoid a big fat monster
function.
"""
settings.setdefault('rhodecode.edition', 'Community Edition')
if 'mako.default_filters' not in settings:
# set custom default filters if we don't have it defined
settings['mako.imports'] = 'from rhodecode.lib.base import h_filter'
settings['mako.default_filters'] = 'h_filter'
if 'mako.directories' not in settings:
mako_directories = settings.setdefault('mako.directories', [
# Base templates of the original application
'rhodecode:templates',
])
log.debug(
"Using the following Mako template directories: %s",
mako_directories)
# Default includes, possible to change as a user
pyramid_includes = settings.setdefault('pyramid.includes', [
'rhodecode.lib.middleware.request_wrapper',
])
log.debug(
"Using the following pyramid.includes: %s",
pyramid_includes)
# TODO: johbo: Re-think this, usually the call to config.include
# should allow to pass in a prefix.
settings.setdefault('rhodecode.api.url', '/_admin/api')
# Sanitize generic settings.
_list_setting(settings, 'default_encoding', 'UTF-8')
_bool_setting(settings, 'is_test', 'false')
_bool_setting(settings, 'gzip_responses', 'false')
# Call split out functions that sanitize settings for each topic.
_sanitize_appenlight_settings(settings)
_sanitize_vcs_settings(settings)
# configure instance id
config_utils.set_instance_id(settings)
return settings
def _sanitize_appenlight_settings(settings):
_bool_setting(settings, 'appenlight', 'false')
def _sanitize_vcs_settings(settings):
"""
Applies settings defaults and does type conversion for all VCS related
settings.
"""
_string_setting(settings, 'vcs.svn.compatible_version', '')
_string_setting(settings, 'git_rev_filter', '--all')
_string_setting(settings, 'vcs.hooks.protocol', 'http')
_string_setting(settings, 'vcs.scm_app_implementation', 'http')
_string_setting(settings, 'vcs.server', '')
_string_setting(settings, 'vcs.server.log_level', 'debug')
_string_setting(settings, 'vcs.server.protocol', 'http')
_bool_setting(settings, 'startup.import_repos', 'false')
_bool_setting(settings, 'vcs.hooks.direct_calls', 'false')
_bool_setting(settings, 'vcs.server.enable', 'true')
_bool_setting(settings, 'vcs.start_server', 'false')
_list_setting(settings, 'vcs.backends', 'hg, git, svn')
_int_setting(settings, 'vcs.connection_timeout', 3600)
# Support legacy values of vcs.scm_app_implementation. Legacy
# configurations may use 'rhodecode.lib.middleware.utils.scm_app_http'
# which is now mapped to 'http'.
scm_app_impl = settings['vcs.scm_app_implementation']
if scm_app_impl == 'rhodecode.lib.middleware.utils.scm_app_http':
settings['vcs.scm_app_implementation'] = 'http'
def _int_setting(settings, name, default):
settings[name] = int(settings.get(name, default))
def _bool_setting(settings, name, default):
input_val = settings.get(name, default)
if isinstance(input_val, unicode):
input_val = input_val.encode('utf8')
settings[name] = asbool(input_val)
def _list_setting(settings, name, default):
raw_value = settings.get(name, default)
old_separator = ','
if old_separator in raw_value:
# If we get a comma separated list, pass it to our own function.
settings[name] = rhodecode_aslist(raw_value, sep=old_separator)
else:
# Otherwise we assume it uses pyramids space/newline separation.
settings[name] = aslist(raw_value)
def _string_setting(settings, name, default, lower=True):
value = settings.get(name, default)
if lower:
value = value.lower()
settings[name] = value