Fix streamTrack
Fixes several cases: - When connection error thrown on retry, and subsequent retry started from the beginning, not the partial start - Clone headers instead of adding Range header to dz.http_headers variables - this was causing errors on other requests - Use 'with self.dz.session.get' to make sure request cleaned up on failure - Fix calculation of downloadPercentage for retries: complete is now the size of the retry, so percentage needs to account for start value
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@ -642,43 +642,54 @@ class DownloadJob:
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return error_num # fallback is enabled and loop went through all formats
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def streamTrack(self, stream, track, range=None):
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def streamTrack(self, stream, track, start=0):
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if self.queueItem.cancel: raise DownloadCancelled
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headers=dict(self.dz.http_headers)
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if range != 0:
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headers['Range'] = f'bytes={start}-'
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chunkLength = start
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percentage = 0
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try:
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headers=self.dz.http_headers
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if range is not None:
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headers['Range'] = range
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request = self.dz.session.get(track.downloadUrl, headers=self.dz.http_headers, stream=True, timeout=10)
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except request_exception.ConnectionError:
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eventlet.sleep(2)
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return self.streamTrack(stream, track)
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with self.dz.session.get(track.downloadUrl, headers=headers, stream=True, timeout=10) as request:
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request.raise_for_status()
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blowfish_key = str.encode(self.dz._get_blowfish_key(str(track.id)))
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complete = int(request.headers["Content-Length"])
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if complete == 0:
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raise DownloadEmpty
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chunkLength = 0
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percentage = 0
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try:
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if start != 0:
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responseRange = request.headers["Content-Range"]
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logger.info(f'{track.title} downloading range {responseRange}')
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else:
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logger.info(f'{track.title} downloading {complete} bytes')
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for chunk in request.iter_content(2048 * 3):
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eventlet.sleep(0)
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if self.queueItem.cancel: raise DownloadCancelled
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if len(chunk) >= 2048:
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chunk = Blowfish.new(blowfish_key, Blowfish.MODE_CBC, b"\x00\x01\x02\x03\x04\x05\x06\x07").decrypt(chunk[0:2048]) + chunk[2048:]
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stream.write(chunk)
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chunkLength += len(chunk)
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if isinstance(self.queueItem, QISingle):
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percentage = (chunkLength / complete) * 100
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percentage = (chunkLength / (complete + start)) * 100
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self.downloadPercentage = percentage
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else:
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chunkProgres = (len(chunk) / complete) / self.queueItem.size * 100
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chunkProgres = (len(chunk) / (complete + start)) / self.queueItem.size * 100
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self.downloadPercentage += chunkProgres
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self.updatePercentage()
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except SSLError:
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range = f'bytes={chunkLength}-'
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logger.info(f'retrying {track.title} with range {range}')
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return self.streamTrack(stream, track, range)
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except SSLError as e:
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logger.info(f'retrying {track.title} from byte {chunkLength}')
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return self.streamTrack(stream, track, chunkLength)
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except (request_exception.ConnectionError, requests.exceptions.ReadTimeout):
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eventlet.sleep(2)
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return self.streamTrack(stream, track, start)
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def updatePercentage(self):
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if round(self.downloadPercentage) != self.lastPercentage and round(self.downloadPercentage) % 2 == 0:
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