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#!/usr/bin/python
# -*- coding: latin1 -*-
### Copyright (C) 2011-2012 Damon Lynch <damonlynch@gmail.com>
### 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 Street, Fifth Floor, Boston, MA 02110-1301
### USA
import multiprocessing
import tempfile
import os
import random
import string
import gio
import logging
logger = multiprocessing.get_logger()
import rpdmultiprocessing as rpdmp
import rpdfile
import problemnotification as pn
import config
import thumbnail as tn
from gettext import gettext as _
class CopyFiles(multiprocessing.Process):
"""
Copies files from source to temporary directory, giving them a random name
"""
def __init__(self, photo_download_folder, video_download_folder, files,
modify_files_during_download, modify_pipe,
scan_pid,
batch_size_MB, results_pipe, terminate_queue,
run_event):
multiprocessing.Process.__init__(self)
self.results_pipe = results_pipe
self.terminate_queue = terminate_queue
self.batch_size_bytes = batch_size_MB * 1048576 # * 1024 * 1024
self.photo_download_folder = photo_download_folder
self.video_download_folder = video_download_folder
self.files = files
self.modify_files_during_download = modify_files_during_download
self.modify_pipe = modify_pipe
self.scan_pid = scan_pid
self.no_files= len(self.files)
self.run_event = run_event
def check_termination_request(self):
"""
Check to see this process has not been requested to immediately terminate
"""
if not self.terminate_queue.empty():
x = self.terminate_queue.get()
# terminate immediately
logger.info("Terminating file copying")
return True
return False
def update_progress(self, amount_downloaded, total):
# first check if process is being terminated
if not self.terminate_queue.empty():
# it is - cancel the current copy
self.cancel_copy.cancel()
else:
if not self.total_reached:
chunk_downloaded = amount_downloaded - self.bytes_downloaded
if (chunk_downloaded > self.batch_size_bytes) or (amount_downloaded == total):
self.bytes_downloaded = amount_downloaded
if amount_downloaded == total:
# this function is called a couple of times when total is reached
self.total_reached = True
self.results_pipe.send((rpdmp.CONN_PARTIAL, (rpdmp.MSG_BYTES, (self.scan_pid, self.total_downloaded + amount_downloaded, chunk_downloaded))))
if amount_downloaded == total:
self.bytes_downloaded = 0
def progress_callback(self, amount_downloaded, total):
self.update_progress(amount_downloaded, total)
def thm_progress_callback(self, amount_downloaded, total):
# we don't care about tracking download progress for tiny THM files!
pass
def run(self):
"""start the actual copying of files"""
#characters used to generate temporary filenames
filename_characters = string.letters + string.digits
self.bytes_downloaded = 0
self.total_downloaded = 0
self.cancel_copy = gio.Cancellable()
self.create_temp_dirs()
# Send the location of both temporary directories, so they can be
# removed once another process attempts to rename all the files in them
# and move them to generated subfolders
self.results_pipe.send((rpdmp.CONN_PARTIAL, (rpdmp.MSG_TEMP_DIRS,
(self.scan_pid,
self.photo_temp_dir,
self.video_temp_dir))))
if self.photo_temp_dir or self.video_temp_dir:
self.thumbnail_maker = tn.Thumbnail()
for i in range(self.no_files):
rpd_file = self.files[i]
self.total_reached = False
# pause if instructed by the caller
self.run_event.wait()
if self.check_termination_request():
return None
source = gio.File(path=rpd_file.full_file_name)
#generate temporary name 5 digits long, no extension
temp_name = ''.join(random.choice(filename_characters) for i in xrange(5))
temp_full_file_name = os.path.join(
self._get_dest_dir(rpd_file.file_type),
temp_name)
rpd_file.temp_full_file_name = temp_full_file_name
dest = gio.File(path=temp_full_file_name)
copy_succeeded = False
try:
source.copy(dest, self.progress_callback, cancellable=self.cancel_copy)
copy_succeeded = True
except gio.Error, inst:
rpd_file.add_problem(None,
pn.DOWNLOAD_COPYING_ERROR_W_NO,
{'filetype': rpd_file.title})
rpd_file.add_extra_detail(
pn.DOWNLOAD_COPYING_ERROR_W_NO_DETAIL,
{'errorno': inst.code, 'strerror': inst.message})
rpd_file.status = config.STATUS_DOWNLOAD_FAILED
rpd_file.error_title = rpd_file.problem.get_title()
rpd_file.error_msg = _("%(problem)s\nFile: %(file)s") % \
{'problem': rpd_file.problem.get_problems(),
'file': rpd_file.full_file_name}
logger.error("Failed to download file: %s", rpd_file.full_file_name)
logger.error(inst)
self.update_progress(rpd_file.size, rpd_file.size)
# increment this amount regardless of whether the copy actually
# succeeded or not. It's neccessary to keep the user informed.
self.total_downloaded += rpd_file.size
# copy THM (video thumbnail file) if there is one
if copy_succeeded and rpd_file.thm_full_name:
source = gio.File(path=rpd_file.thm_full_name)
# reuse video's file name
temp_thm_full_name = temp_full_file_name + '__rpd__thm'
dest = gio.File(path=temp_thm_full_name)
try:
source.copy(dest, self.thm_progress_callback, cancellable=self.cancel_copy)
rpd_file.temp_thm_full_name = temp_thm_full_name
logger.debug("Copied video THM file %s", rpd_file.temp_thm_full_name)
except gio.Error, inst:
logger.error("Failed to download video THM file: %s", rpd_file.thm_full_name)
else:
temp_thm_full_name = None
if copy_succeeded and rpd_file.generate_thumbnail:
thumbnail, thumbnail_icon = self.thumbnail_maker.get_thumbnail(
temp_full_file_name,
temp_thm_full_name,
rpd_file.file_type,
(160, 120), (100,100))
else:
thumbnail = None
thumbnail_icon = None
if rpd_file.metadata is not None:
rpd_file.metadata = None
download_count = i + 1
if self.modify_files_during_download and copy_succeeded:
copy_finished = download_count == self.no_files
self.modify_pipe.send((rpd_file, download_count, temp_full_file_name,
thumbnail_icon, thumbnail, copy_finished))
else:
self.results_pipe.send((rpdmp.CONN_PARTIAL, (rpdmp.MSG_FILE,
(copy_succeeded, rpd_file, download_count,
temp_full_file_name,
thumbnail_icon, thumbnail))))
self.results_pipe.send((rpdmp.CONN_COMPLETE, None))
def _get_dest_dir(self, file_type):
if file_type == rpdfile.FILE_TYPE_PHOTO:
return self.photo_temp_dir
else:
return self.video_temp_dir
def _create_temp_dir(self, folder):
try:
temp_dir = tempfile.mkdtemp(prefix="rpd-tmp-", dir=folder)
except OSError, (errno, strerror):
# FIXME: error reporting
logger.error("Failed to create temporary directory in %s: %s %s",
errono,
strerror,
folder)
temp_dir = None
return temp_dir
def create_temp_dirs(self):
self.photo_temp_dir = self.video_temp_dir = None
if self.photo_download_folder is not None:
self.photo_temp_dir = self._create_temp_dir(self.photo_download_folder)
if self.video_download_folder is not None:
self.video_temp_dir = self._create_temp_dir(self.photo_download_folder)
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