errorpages: convert webob responses better, include status text + headers

rhodecode/config/middleware.py

@@ -1,358 +1,367 b''
 # -*- coding: utf-8 -*-
 
 # Copyright (C) 2010-2016  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/
 
 """
 Pylons middleware initialization
 """
 import logging
 
 from paste.registry import RegistryManager
 from paste.gzipper import make_gzip_middleware
 from pylons.wsgiapp import PylonsApp
 from pyramid.authorization import ACLAuthorizationPolicy
 from pyramid.config import Configurator
 from pyramid.static import static_view
 from pyramid.settings import asbool, aslist
 from pyramid.wsgi import wsgiapp
 from pyramid.httpexceptions import HTTPError, HTTPInternalServerError
 import pyramid.httpexceptions as httpexceptions
 from pyramid.renderers import render_to_response, render
 from routes.middleware import RoutesMiddleware
 import routes.util
 
 import rhodecode
 from rhodecode.config import patches
 from rhodecode.config.environment import (
     load_environment, load_pyramid_environment)
 from rhodecode.lib.middleware import csrf
 from rhodecode.lib.middleware.appenlight import wrap_in_appenlight_if_enabled
 from rhodecode.lib.middleware.disable_vcs import DisableVCSPagesWrapper
 from rhodecode.lib.middleware.https_fixup import HttpsFixup
 from rhodecode.lib.middleware.vcs import VCSMiddleware
 from rhodecode.lib.plugins.utils import register_rhodecode_plugin
 
 
 log = logging.getLogger(__name__)
 
 
 def make_app(global_conf, full_stack=True, static_files=True, **app_conf):
     """Create a Pylons WSGI application and return it
 
     ``global_conf``
         The inherited configuration for this application. Normally from
         the [DEFAULT] section of the Paste ini file.
 
     ``full_stack``
         Whether or not this application provides a full WSGI stack (by
         default, meaning it handles its own exceptions and errors).
         Disable full_stack when this application is "managed" by
         another WSGI middleware.
 
     ``app_conf``
         The application's local configuration. Normally specified in
         the [app:<name>] section of the Paste ini file (where <name>
         defaults to main).
 
     """
     # Apply compatibility patches
     patches.kombu_1_5_1_python_2_7_11()
     patches.inspect_getargspec()
 
     # Configure the Pylons environment
     config = load_environment(global_conf, app_conf)
 
     # The Pylons WSGI app
     app = PylonsApp(config=config)
     if rhodecode.is_test:
         app = csrf.CSRFDetector(app)
 
     expected_origin = config.get('expected_origin')
     if expected_origin:
         # The API can be accessed from other Origins.
         app = csrf.OriginChecker(app, expected_origin,
                                  skip_urls=[routes.util.url_for('api')])
 
 
     if asbool(full_stack):
 
         # Appenlight monitoring and error handler
         app, appenlight_client = wrap_in_appenlight_if_enabled(app, config)
 
         # we want our low level middleware to get to the request ASAP. We don't
         # need any pylons stack middleware in them
         app = VCSMiddleware(app, config, appenlight_client)
 
     # enable https redirects based on HTTP_X_URL_SCHEME set by proxy
     app = HttpsFixup(app, config)
 
     # Establish the Registry for this application
     app = RegistryManager(app)
 
     app.config = config
 
     return app
 
 
 def make_pyramid_app(global_config, **settings):
     """
     Constructs the WSGI application based on Pyramid and wraps the Pylons based
     application.
 
     Specials:
 
     * We migrate from Pylons to Pyramid. While doing this, we keep both
       frameworks functional. This involves moving some WSGI middlewares around
       and providing access to some data internals, so that the old code is
       still functional.
 
     * 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.
 
     """
     # The edition string should be available in pylons too, so we add it here
     # before copying the settings.
     settings.setdefault('rhodecode.edition', 'Community Edition')
 
     # As long as our Pylons application does expect "unprepared" settings, make
     # sure that we keep an unmodified copy. This avoids unintentional change of
     # behavior in the old application.
     settings_pylons = settings.copy()
 
     sanitize_settings_and_apply_defaults(settings)
     config = Configurator(settings=settings)
     add_pylons_compat_data(config.registry, global_config, settings_pylons)
 
     load_pyramid_environment(global_config, settings)
 
     includeme(config)
     includeme_last(config)
     pyramid_app = config.make_wsgi_app()
     pyramid_app = wrap_app_in_wsgi_middlewares(pyramid_app, config)
     return pyramid_app
 
 
 def add_pylons_compat_data(registry, global_config, settings):
     """
     Attach data to the registry to support the Pylons integration.
     """
     registry._pylons_compat_global_config = global_config
     registry._pylons_compat_settings = settings
 
 
+def webob_to_pyramid_http_response(webob_response):
+    ResponseClass = httpexceptions.status_map[webob_response.status_int]
+    pyramid_response = ResponseClass(webob_response.status)
+    pyramid_response.status = webob_response.status
+    pyramid_response.headers.update(webob_response.headers)
+    if pyramid_response.headers['content-type'] == 'text/html':
+        pyramid_response.headers['content-type'] = 'text/html; charset=UTF-8'
+    return pyramid_response
+
+
 def error_handler(exc, request):
     # TODO: dan: replace the old pylons error controller with this
     from rhodecode.model.settings import SettingsModel
     from rhodecode.lib.utils2 import AttributeDict
 
     try:
         rc_config = SettingsModel().get_all_settings()
     except Exception:
         log.exception('failed to fetch settings')
         rc_config = {}
 
     c = AttributeDict()
     c.error_message = exc.status
     c.error_explanation = exc.explanation or str(exc)
     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 = rc_config.get('rhodecode_title')
     if not c.rhodecode_name:
         c.rhodecode_name = 'Rhodecode'
 
     base_response = HTTPInternalServerError()
     # prefer original exception for the response since it may have headers set
     if isinstance(exc, HTTPError):
         base_response = exc
 
     response = render_to_response(
         '/errors/error_document.html', {'c': c}, request=request,
         response=base_response)
 
     return response
 
 
 def includeme(config):
     settings = config.registry.settings
 
     # Includes which are required. The application would fail without them.
     config.include('pyramid_mako')
     config.include('pyramid_beaker')
     config.include('rhodecode.authentication')
     config.include('rhodecode.login')
     config.include('rhodecode.tweens')
     config.include('rhodecode.api')
     config.add_route(
         'rhodecode_support', 'https://rhodecode.com/help/', static=True)
 
     # 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')
 
     # plugin information
     config.registry.rhodecode_plugins = {}
 
     config.add_directive(
         'register_rhodecode_plugin', register_rhodecode_plugin)
     # include RhodeCode plugins
     includes = aslist(settings.get('rhodecode.includes', []))
     for inc in includes:
         config.include(inc)
 
     pylons_app = make_app(
         config.registry._pylons_compat_global_config,
         **config.registry._pylons_compat_settings)
     config.registry._pylons_compat_config = pylons_app.config
 
     pylons_app_as_view = wsgiapp(pylons_app)
 
     # Protect from VCS Server error related pages when server is not available
     vcs_server_enabled = asbool(settings.get('vcs.server.enable', 'true'))
     if not vcs_server_enabled:
         pylons_app_as_view = DisableVCSPagesWrapper(pylons_app_as_view)
 
-
     def pylons_app_with_error_handler(context, request):
         """
         Handle exceptions from rc pylons app:
 
         - old webob type exceptions get converted to pyramid exceptions
         - pyramid exceptions are passed to the error handler view
         """
         try:
             response = pylons_app_as_view(context, request)
             if 400 <= response.status_int <= 599: # webob type error responses
-                ExcClass = httpexceptions.status_map[response.status_int]
-                return error_handler(ExcClass(response.status), request)
+                return error_handler(
+                    webob_to_pyramid_http_response(response), request)
         except HTTPError as e: # pyramid type exceptions
             return error_handler(e, request)
 
         return response
 
     # This is the glue which allows us to migrate in chunks. By registering the
     # pylons based application as the "Not Found" view in Pyramid, we will
     # fallback to the old application each time the new one does not yet know
     # how to handle a request.
     config.add_notfound_view(pylons_app_with_error_handler)
 
     config.add_view(error_handler, context=HTTPError) # exceptions in rc pyramid
 
 def includeme_last(config):
     """
     The static file catchall needs to be last in the view configuration.
     """
     settings = config.registry.settings
 
     # Note: johbo: I would prefer to register a prefix for static files at some
     # point, e.g. move them under '_static/'. This would fully avoid that we
     # can have name clashes with a repository name. Imaging someone calling his
     # repo "css" ;-) Also having an external web server to serve out the static
     # files seems to be easier to set up if they have a common prefix.
     #
     # Example: config.add_static_view('_static', path='rhodecode:public')
     #
     # It might be an option to register both paths for a while and then migrate
     # over to the new location.
 
     # Serving static files with a catchall.
     if settings['static_files']:
         config.add_route('catchall_static', '/*subpath')
         config.add_view(
             static_view('rhodecode:public'), route_name='catchall_static')
 
 
 def wrap_app_in_wsgi_middlewares(pyramid_app, config):
     """
     Apply outer WSGI middlewares around the application.
 
     Part of this has been moved up from the Pylons layer, so that the
     data is also available if old Pylons code is hit through an already ported
     view.
     """
     settings = config.registry.settings
 
     # Add RoutesMiddleware to support the pylons compatibility tween during
     # migration to pyramid.
     pyramid_app = RoutesMiddleware(
         pyramid_app, config.registry._pylons_compat_config['routes.map'])
 
     # TODO: johbo: Don't really see why we enable the gzip middleware when
     # serving static files, might be something that should have its own setting
     # as well?
     if settings['static_files']:
         pyramid_app = make_gzip_middleware(
             pyramid_app, settings, compress_level=1)
 
     return pyramid_app
 
 
 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.
     """
 
     # Pyramid's mako renderer has to search in the templates folder so that the
     # old templates still work. Ported and new templates are expected to use
     # real asset specifications for the includes.
     mako_directories = settings.setdefault('mako.directories', [
         # Base templates of the original Pylons 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')
 
     _bool_setting(settings, 'vcs.server.enable', 'true')
     _bool_setting(settings, 'static_files', 'true')
     _bool_setting(settings, 'is_test', 'false')
 
     return settings
 
 
 def _bool_setting(settings, name, default):
     settings[name] = asbool(settings.get(name, default))