- # Establish connection
- try:
- data = urllib2.urlopen(request)
- except (urllib2.HTTPError, ), err:
- if err.code != 416: # 416 is 'Requested range not satisfiable'
- raise
- # Unable to resume
- data = urllib2.urlopen(basic_request)
- content_length = data.info()['Content-Length']
-
- if content_length is not None and long(content_length) == resume_len:
- # Because the file had already been fully downloaded
- self.report_file_already_downloaded(filename)
- self._num_downloads += 1
- return True
- else:
- # Because the server didn't let us
- self.report_unable_to_resume()
- open_mode = 'wb'
+ count = 0
+ retries = self.params.get('retries', 0)
+ while True:
+ # Establish connection
+ try:
+ data = urllib2.urlopen(request)
+ break
+ except (urllib2.HTTPError, ), err:
+ if err.code == 503:
+ # Retry in case of HTTP error 503
+ count += 1
+ if count <= retries:
+ self.report_retry(count, retries)
+ continue
+ if err.code != 416: # 416 is 'Requested range not satisfiable'
+ raise
+ # Unable to resume
+ data = urllib2.urlopen(basic_request)
+ content_length = data.info()['Content-Length']
+
+ if content_length is not None and long(content_length) == resume_len:
+ # Because the file had already been fully downloaded
+ self.report_file_already_downloaded(filename)
+ return True
+ else:
+ # Because the server didn't let us
+ self.report_unable_to_resume()
+ open_mode = 'wb'