def execute(self):
"""Download the file at the URL."""
logger.debug("Task {}: preparing to download {}".format(self,
self.url))
response = urlopen(self.url)
meta = response.info()
encoding = response.headers['content-type'].split('charset=')[-1]
size = int(meta.getheaders("Content-Length")[0])
logger.debug("Task {}: size={}, encoding={}".format(self,
size, encoding))
chunk_size = 4096
if self.filename is None:
file = self.file
else:
file = open(self.filename, "wb")
try:
keep = True
progress = 0.0
percent = 0
self.update(title=t("task.download.title",
url=self.url, progress=0),
text=t("task.download.downloading",
url=self.url, percent=0))
while keep:
old_percent = percent
progress += chunk_size
percent = round((progress / size) * 100, 1)
if int(percent) != int(old_percent):
self.update(title=t("task.download.title",
url=self.url, percent=int(percent)),
text=t("task.download.downloading",
url=self.url, percent=int(percent)),
progress=int(percent))
chunk = response.read(chunk_size)
if not chunk:
keep = False
file.write(chunk)
file.seek(0)
finally:
if self.filename is not None:
file.close()
def run(self):
"""Run in a separate thread.
This method will call 'execute' in a separate thread and
will catch specific exceptions. It shouldn't be necessary
to override this method.
"""
try:
self.execute()
except InterruptTask:
self.cancel()
except Exception:
logger.exception("Exception in task {}:".format(self))
else:
logger.debug("Completed the task {} successfully".format(self))
finally:
if self.dialog:
self.dialog.Destroy()
def run(self):
"""Run in a separate thread.
This method will call 'execute' in a separate thread and
will catch specific exceptions. It shouldn't be necessary
to override this method.
"""
try:
self.execute()
except InterruptTask:
self.cancel()
except Exception:
logger.exception("Exception in task {}:".format(self))
else:
logger.debug("Completed the task {} successfully".format(self))
finally:
if self.dialog:
self.dialog.Destroy()
def cancel(self):
"""Should a specific action be performed when cancelled?"""
logger.debug("Cancelled the task {}".format(self))
def start(self):
"""Start the thread and display the dialog."""
logger.debug("Starting the task {}".format(self))
Thread.start(self)
if self.dialog:
self.dialog.ShowModal()
def cancel(self):
"""Should a specific action be performed when cancelled?"""
logger.debug("Cancelled the task {}".format(self))
def start(self):
"""Start the thread and display the dialog."""
logger.debug("Starting the task {}".format(self))
Thread.start(self)
if self.dialog:
self.dialog.ShowModal()
