112 lines
4.6 KiB
Python
112 lines
4.6 KiB
Python
from ssl import SSLError
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from time import sleep
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import logging
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from requests import get
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from requests.exceptions import ConnectionError as RequestsConnectionError, ReadTimeout, ChunkedEncodingError
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from urllib3.exceptions import SSLError as u3SSLError
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from deemix.utils.crypto import _md5, _ecbCrypt, _ecbDecrypt, generateBlowfishKey, decryptChunk
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from deemix.utils import USER_AGENT_HEADER
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from deemix.types.DownloadObjects import Single
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from deemix.errors import DownloadCanceled, DownloadEmpty
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logger = logging.getLogger('deemix')
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def generateStreamPath(sng_id, md5, media_version, media_format):
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urlPart = b'\xa4'.join(
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[md5.encode(), str(media_format).encode(), str(sng_id).encode(), str(media_version).encode()])
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md5val = _md5(urlPart)
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step2 = md5val.encode() + b'\xa4' + urlPart + b'\xa4'
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step2 = step2 + (b'.' * (16 - (len(step2) % 16)))
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urlPart = _ecbCrypt('jo6aey6haid2Teih', step2)
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return urlPart.decode("utf-8")
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def reverseStreamPath(urlPart):
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step2 = _ecbDecrypt('jo6aey6haid2Teih', urlPart)
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(_, md5, media_format, sng_id, media_version, _) = step2.split(b'\xa4')
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return (sng_id.decode('utf-8'), md5.decode('utf-8'), media_version.decode('utf-8'), media_format.decode('utf-8'))
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def generateCryptedStreamURL(sng_id, md5, media_version, media_format):
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urlPart = generateStreamPath(sng_id, md5, media_version, media_format)
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return "https://e-cdns-proxy-" + md5[0] + ".dzcdn.net/mobile/1/" + urlPart
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def generateStreamURL(sng_id, md5, media_version, media_format):
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urlPart = generateStreamPath(sng_id, md5, media_version, media_format)
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return "https://e-cdns-proxy-" + md5[0] + ".dzcdn.net/api/1/" + urlPart
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def reverseStreamURL(url):
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urlPart = url[url.find("/1/")+3:]
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return reverseStreamPath(urlPart)
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def streamTrack(outputStream, track, start=0, downloadObject=None, listener=None):
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if downloadObject and downloadObject.isCanceled: raise DownloadCanceled
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headers= {'User-Agent': USER_AGENT_HEADER}
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chunkLength = start
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isCryptedStream = "/mobile/" in track.downloadURL or "/media/" in track.downloadURL
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itemData = {
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'id': track.id,
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'title': track.title,
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'artist': track.mainArtist.name
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}
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try:
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with get(track.downloadURL, headers=headers, stream=True, timeout=10) as request:
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request.raise_for_status()
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if isCryptedStream:
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blowfish_key = generateBlowfishKey(str(track.id))
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complete = int(request.headers["Content-Length"])
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if complete == 0: raise DownloadEmpty
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if start != 0:
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responseRange = request.headers["Content-Range"]
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if listener:
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listener.send('downloadInfo', {
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'uuid': downloadObject.uuid,
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'data': itemData,
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'state': "downloading",
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'alreadyStarted': True,
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'value': responseRange
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})
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else:
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if listener:
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listener.send('downloadInfo', {
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'uuid': downloadObject.uuid,
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'data': itemData,
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'state': "downloading",
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'alreadyStarted': False,
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'value': complete
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})
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isStart = True
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for chunk in request.iter_content(2048 * 3):
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if isCryptedStream:
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if len(chunk) >= 2048:
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chunk = decryptChunk(blowfish_key, chunk[0:2048]) + chunk[2048:]
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if isStart and chunk[0] == 0:
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for i, byte in enumerate(chunk):
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if byte != 0: break
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chunk = chunk[i:]
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isStart = False
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outputStream.write(chunk)
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chunkLength += len(chunk)
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if downloadObject:
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if isinstance(downloadObject, Single):
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chunkProgres = (chunkLength / (complete + start)) * 100
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downloadObject.progressNext = chunkProgres
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else:
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chunkProgres = (len(chunk) / (complete + start)) / downloadObject.size * 100
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downloadObject.progressNext += chunkProgres
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downloadObject.updateProgress(listener)
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except (SSLError, u3SSLError):
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streamTrack(outputStream, track, chunkLength, downloadObject, listener)
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except (RequestsConnectionError, ReadTimeout, ChunkedEncodingError):
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sleep(2)
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streamTrack(outputStream, track, start, downloadObject, listener)
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