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# GNU MediaGoblin -- federated, autonomous media hosting
# Copyright (C) 2011 Free Software Foundation, Inc
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero 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 Affero 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/>.
import os
import urllib
import routes
from webob import Request, exc
from mediagoblin import routing, util, storage, staticdirect
from mediagoblin.config import (
read_mediagoblin_config, generate_validation_report)
from mediagoblin.db.open import setup_connection_and_db_from_config
from mediagoblin.mg_globals import setup_globals
from mediagoblin.init.celery import setup_celery_from_config
from mediagoblin.workbench import WorkbenchManager
class Error(Exception): pass
class ImproperlyConfigured(Error): pass
class MediaGoblinApp(object):
"""
WSGI application of MediaGoblin
... this is the heart of the program!
"""
def __init__(self, config_path, setup_celery=True):
"""
Initialize the application based on a configuration file.
Arguments:
- config_path: path to the configuration file we're opening.
- setup_celery: whether or not to setup celery during init.
(Note: setting 'celery_setup_elsewhere' also disables
setting up celery.)
"""
##############
# Setup config
##############
# Open and setup the config
global_config, validation_result = read_mediagoblin_config(config_path)
app_config = global_config['mediagoblin']
# report errors if necessary
validation_report = generate_validation_report(
global_config, validation_result)
if validation_report:
raise ImproperlyConfigured(validation_report)
##########################################
# Setup other connections / useful objects
##########################################
# Set up the database
self.connection, self.db = setup_connection_and_db_from_config(
app_config)
# Get the template environment
self.template_loader = util.get_jinja_loader(
app_config.get('user_template_path'))
# Set up storage systems
self.public_store = storage.storage_system_from_config(
app_config, 'publicstore')
self.queue_store = storage.storage_system_from_config(
app_config, 'queuestore')
# set up routing
self.routing = routing.get_mapper()
# set up staticdirector tool
if app_config.has_key('direct_remote_path'):
self.staticdirector = staticdirect.RemoteStaticDirect(
app_config['direct_remote_path'].strip())
elif app_config.has_key('direct_remote_paths'):
direct_remote_path_lines = app_config[
'direct_remote_paths'].strip().splitlines()
self.staticdirector = staticdirect.MultiRemoteStaticDirect(
dict([line.strip().split(' ', 1)
for line in direct_remote_path_lines]))
else:
raise ImproperlyConfigured(
"One of direct_remote_path or "
"direct_remote_paths must be provided")
# Setup celery, if appropriate
if setup_celery and not app_config.get('celery_setup_elsewhere'):
if os.environ.get('CELERY_ALWAYS_EAGER'):
setup_celery_from_config(
app_config, global_config,
force_celery_always_eager=True)
else:
setup_celery_from_config(app_config, global_config)
#######################################################
# Insert appropriate things into mediagoblin.mg_globals
#
# certain properties need to be accessed globally eg from
# validators, etc, which might not access to the request
# object.
#######################################################
setup_globals(
app_config=app_config,
global_config=global_config,
# TODO: No need to set these two up as globals, we could
# just read them out of mg_globals.app_config
email_sender_address=app_config['email_sender_address'],
email_debug_mode=app_config['email_debug_mode'],
# Actual, useful to everyone objects
app=self,
db_connection=self.connection,
database=self.db,
public_store=self.public_store,
queue_store=self.queue_store,
workbench_manager=WorkbenchManager(app_config['workbench_path']))
def __call__(self, environ, start_response):
request = Request(environ)
path_info = request.path_info
## Routing / controller loading stuff
route_match = self.routing.match(path_info)
# No matching page?
if route_match is None:
# Try to do see if we have a match with a trailing slash
# added and if so, redirect
if not path_info.endswith('/') \
and request.method == 'GET' \
and self.routing.match(path_info + '/'):
new_path_info = path_info + '/'
if request.GET:
new_path_info = '%s?%s' % (
new_path_info, urllib.urlencode(request.GET))
redirect = exc.HTTPFound(location=new_path_info)
return request.get_response(redirect)(environ, start_response)
# Okay, no matches. 404 time!
return exc.HTTPNotFound()(environ, start_response)
controller = util.import_component(route_match['controller'])
request.start_response = start_response
## Attach utilities to the request object
request.matchdict = route_match
request.urlgen = routes.URLGenerator(self.routing, environ)
# Do we really want to load this via middleware? Maybe?
request.session = request.environ['beaker.session']
# Attach self as request.app
# Also attach a few utilities from request.app for convenience?
request.app = self
request.locale = util.get_locale_from_request(request)
request.template_env = util.get_jinja_env(
self.template_loader, request.locale)
request.db = self.db
request.staticdirect = self.staticdirector
util.setup_user_in_request(request)
return controller(request)(environ, start_response)
def paste_app_factory(global_config, **app_config):
mgoblin_app = MediaGoblinApp(app_config['config'])
return mgoblin_app
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