74 lines
2.8 KiB
Python
74 lines
2.8 KiB
Python
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import struct
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import binascii
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# ================================================================
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# 0 1 2 3
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# 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
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# +---+-------+-------+-------------------------------------------+
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# |VER| EXT |INFO |INFO HASH ... |
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# |(2)| (4) |HASH | (INFO HASH LENGTH) |
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# | | |LENGTH | |
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# | | | (4) | |
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# +---+---+---+-------+---+---------------+-------+---------------+
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# |PIECE |TOTAL LENGTH |UPLOAD LENGTH |BIT- |BITFIELD ... |
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# |LENGTH | (8) | (8) |FIELD | (BITFIELD |
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# | (4) | | |LENGTH | LENGTH) |
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# | | | | (4) | |
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# +-------+-------+-------+-------+-------+-------+---------------+
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# |NUM |INDEX |LENGTH |PIECE |PIECE BITFIELD ... |
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# |IN- | (4) | (4) |BIT- | (PIECE BITFIELD LENGTH) |
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# |FLIGHT | | |FIELD | |
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# |PIECE | | |LENGTH | |
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# | (4) | | | (4) | |
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# +-------+-------+-------+-------+-------------------------------+
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#
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# ^ ^
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# | |
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# +-------------------------------------------------------+
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# Repeated in (NUM IN-FLIGHT) PIECE times
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# more detail
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# https://aria2.github.io/manual/en/html/technical-notes.html
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# ================================================================
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def parse_aria_control_file(file_name):
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with open(file_name, "rb") as f:
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try:
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f.seek(0) # Go to beginning, read VER
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version = f.read(2)
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i = int(version.encode('hex'), 16)
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print "version is " + str(i)
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# skip EXT, find info hash_binary length
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f.seek(6)
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length = f.read(4)
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hash_length = int(length.encode('hex'), 16)
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print "hash length is " + str(hash_length)
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# read next hash_length
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f.seek(10) # Go to info hash
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hash_binary = f.read(hash_length)
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info_hash = ""
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for ch in hash_binary:
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hex_word = hex(ord(ch))[2:]
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info_hash += hex_word.upper()
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magnet_link = "magnet:?xt=urn:btih:" + info_hash
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print magnet_link
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except:
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pass
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finally:
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f.close()
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if __name__ == '__main__':
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parse_aria_control_file("dahufa.aria2")
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# version is 1
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# hash length is 20
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# magnet:?xt=urn:btih:959E2ECEB954313D3869EFF7924CA7CD8DE739
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