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# Copyright (C) 2009, Sugar Labs
# Copyright (C) 2009, Tomeu Vizoso
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
'''Sugar bundle updater: model.
This module implements the non-GUI portions of the bundle updater, including
list of installed bundls, whether updates are needed, and the URL at which to
find the bundle updated.
'''
import os
import logging
import tempfile
from urlparse import urlparse
import traceback
import gobject
import gio
from sugar import env
from sugar.datastore import datastore
from sugar.bundle.activitybundle import ActivityBundle
from jarabe.model import bundleregistry
from backends import aslo
class UpdateModel(gobject.GObject):
__gtype_name__ = 'SugarUpdateModel'
__gsignals__ = {
'progress': (gobject.SIGNAL_RUN_FIRST,
gobject.TYPE_NONE,
([int, str, float, int])),
}
ACTION_CHECKING = 0
ACTION_UPDATING = 1
ACTION_DOWNLOADING = 2
def __init__(self):
gobject.GObject.__init__(self)
self.updates = None
self._bundles_to_check = None
self._bundles_to_update = None
self._total_bundles_to_update = 0
self._downloader = None
def check_updates(self):
self.updates = []
self._bundles_to_check = \
[bundle for bundle in bundleregistry.get_registry()]
self._check_next_update()
def _check_next_update(self):
total = len(bundleregistry.get_registry())
current = total - len(self._bundles_to_check)
bundle = self._bundles_to_check.pop()
self.emit('progress', UpdateModel.ACTION_CHECKING, bundle.get_name(),
current, total)
aslo.fetch_update_info(bundle, self.__check_completed_cb)
def __check_completed_cb(self, bundle, version, link, size, error_message):
if error_message is not None:
logging.error('Error getting update information from server:\n'
'%s' % error_message)
if version is not None and version > bundle.get_activity_version():
self.updates.append(BundleUpdate(bundle, version, link, size))
if self._bundles_to_check:
gobject.idle_add(self._check_next_update)
else:
total = len(bundleregistry.get_registry())
if bundle is None:
name = ''
else:
name = bundle.get_name()
self.emit('progress', UpdateModel.ACTION_CHECKING, name, total,
total)
def update(self, bundle_ids):
self._bundles_to_update = []
for bundle_update in self.updates:
if bundle_update.bundle.get_bundle_id() in bundle_ids:
self._bundles_to_update.append(bundle_update)
self._total_bundles_to_update = len(self._bundles_to_update)
self._download_next_update()
def _download_next_update(self):
bundle_update = self._bundles_to_update.pop()
total = self._total_bundles_to_update * 2
current = total - len(self._bundles_to_update) * 2 - 2
self.emit('progress', UpdateModel.ACTION_DOWNLOADING,
bundle_update.bundle.get_name(), current, total)
self._downloader = _Downloader(bundle_update)
self._downloader.connect('progress', self.__downloader_progress_cb)
self._downloader.connect('error', self.__downloader_error_cb)
def __downloader_progress_cb(self, downloader, progress):
logging.debug('__downloader_progress_cb %r' % progress)
total = self._total_bundles_to_update * 2
current = total - len(self._bundles_to_update) * 2 - 2 + progress
self.emit('progress', UpdateModel.ACTION_DOWNLOADING,
self._downloader.bundle_update.bundle.get_name(),
current, total)
if progress == 1:
self._install_update(self._downloader.bundle_update,
self._downloader.get_local_file_path())
self._downloader = None
def __downloader_error_cb(self, downloader, error_message):
logging.error('Error downloading update:\n%s' % error_message)
total = self._total_bundles_to_update * 2
current = total - len(self._bundles_to_update) * 2
self.emit('progress', UpdateModel.ACTION_UPDATING, '', current, total)
if self._bundles_to_update:
# do it in idle so the UI has a chance to refresh
gobject.idle_add(self._download_next_update)
def _install_update(self, bundle_update, local_file_path):
total = self._total_bundles_to_update * 2
current = total - len(self._bundles_to_update) * 2 - 1
self.emit('progress', UpdateModel.ACTION_UPDATING,
bundle_update.bundle.get_name(),
current, total)
# TODO: Should we first expand the zip async so we can provide progress
# and only then copy to the journal?
jobject = datastore.create()
try:
title = '%s-%s' % (bundle_update.bundle.get_name(),
bundle_update.version)
jobject.metadata['title'] = title
jobject.metadata['mime_type'] = ActivityBundle.MIME_TYPE
jobject.file_path = local_file_path
datastore.write(jobject, transfer_ownership=True)
finally:
jobject.destroy()
current += 1
self.emit('progress', UpdateModel.ACTION_UPDATING,
bundle_update.bundle.get_name(),
current, total)
if self._bundles_to_update:
# do it in idle so the UI has a chance to refresh
gobject.idle_add(self._download_next_update)
def get_total_bundles_to_update(self):
return self._total_bundles_to_update
class BundleUpdate(object):
def __init__(self, bundle, version, link, size):
self.bundle = bundle
self.version = version
self.link = link
self.size = size
class _Downloader(gobject.GObject):
_CHUNK_SIZE = 10240 # 10K
__gsignals__ = {
'progress': (gobject.SIGNAL_RUN_FIRST,
gobject.TYPE_NONE,
([float])),
'error': (gobject.SIGNAL_RUN_FIRST,
gobject.TYPE_NONE,
([str])),
}
def __init__(self, bundle_update):
gobject.GObject.__init__(self)
self.bundle_update = bundle_update
self._input_stream = None
self._output_stream = None
self._pending_buffers = []
self._input_file = gio.File(bundle_update.link)
self._output_file = None
self._downloaded_size = 0
self._input_file.read_async(self.__file_read_async_cb)
def __file_read_async_cb(self, gfile, result):
try:
self._input_stream = self._input_file.read_finish(result)
except:
self.emit('error', traceback.format_exc())
return
temp_file_path = self._get_temp_file_path(self.bundle_update.link)
self._output_file = gio.File(temp_file_path)
self._output_stream = self._output_file.create()
self._input_stream.read_async(self._CHUNK_SIZE, self.__read_async_cb,
gobject.PRIORITY_LOW)
def __read_async_cb(self, input_stream, result):
data = input_stream.read_finish(result)
if data is None:
# TODO
pass
elif not data:
logging.debug('closing input stream')
self._input_stream.close()
self._check_if_finished_writing()
else:
self._pending_buffers.append(data)
self._input_stream.read_async(self._CHUNK_SIZE,
self.__read_async_cb,
gobject.PRIORITY_LOW)
self._write_next_buffer()
def __write_async_cb(self, output_stream, result, user_data):
count = output_stream.write_finish(result)
self._downloaded_size += count
progress = self._downloaded_size / float(self.bundle_update.size)
self.emit('progress', progress)
self._check_if_finished_writing()
if self._pending_buffers:
self._write_next_buffer()
def _write_next_buffer(self):
if self._pending_buffers and not self._output_stream.has_pending():
data = self._pending_buffers.pop(0)
# TODO: we pass the buffer as user_data because of
# http://bugzilla.gnome.org/show_bug.cgi?id=564102
self._output_stream.write_async(data, self.__write_async_cb,
gobject.PRIORITY_LOW,
user_data=data)
def _get_temp_file_path(self, uri):
# TODO: Should we use the HTTP headers for the file name?
scheme_, netloc_, path, params_, query_, fragment_ = \
urlparse(uri)
path = os.path.basename(path)
base_name, extension_ = os.path.splitext(path)
fd, file_path = tempfile.mkstemp(dir=env.get_user_activities_path(),
prefix=base_name, suffix='.xo')
os.close(fd)
os.unlink(file_path)
return file_path
def get_local_file_path(self):
return self._output_file.get_path()
def _check_if_finished_writing(self):
if not self._pending_buffers and \
not self._output_stream.has_pending() and \
self._input_stream.is_closed():
logging.debug('closing output stream')
self._output_stream.close()
self.emit('progress', 1.0)
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