SickGear/lib/hachoir_parser/misc/torrent.py
echel0n 0d9fbc1ad7 Welcome to our SickBeard-TVRage Edition ...
This version of SickBeard uses both TVDB and TVRage to search and gather it's series data from allowing you to now have access to and download shows that you couldn't before because of being locked into only what TheTVDB had to offer.

Also this edition is based off the code we used in our XEM editon so it does come with scene numbering support as well as all the other features our XEM edition has to offer.

Please before using this with your existing database (sickbeard.db) please make a backup copy of it and delete any other database files such as cache.db and failed.db if present, we HIGHLY recommend starting out with no database files at all to make this a fresh start but the choice is at your own risk!

Enjoy!
2014-03-09 22:39:12 -07:00

163 lines
5.4 KiB
Python

"""
.torrent metainfo file parser
http://wiki.theory.org/BitTorrentSpecification#Metainfo_File_Structure
Status: To statufy
Author: Christophe Gisquet <christophe.gisquet@free.fr>
"""
from lib.hachoir_parser import Parser
from lib.hachoir_core.field import (FieldSet, ParserError,
String, RawBytes)
from lib.hachoir_core.endian import LITTLE_ENDIAN
from lib.hachoir_core.tools import makePrintable, timestampUNIX, humanFilesize
# Maximum number of bytes for string length
MAX_STRING_LENGTH = 6 # length in 0..999999
# Maximum number of bytes for integer value
MAX_INTEGER_SIZE = 21 # 21 decimal digits (or "-" sign and 20 digits)
class Integer(FieldSet):
# i<integer encoded in base ten ASCII>e
def createFields(self):
yield String(self, "start", 1, "Integer start delimiter (i)", charset="ASCII")
# Find integer end
addr = self.absolute_address+self.current_size
len = self.stream.searchBytesLength('e', False, addr, addr+(MAX_INTEGER_SIZE+1)*8)
if len is None:
raise ParserError("Torrent: Unable to find integer end delimiter (e)!")
if not len:
raise ParserError("Torrent: error, empty integer!")
yield String(self, "value", len, "Integer value", charset="ASCII")
yield String(self, "end", 1, "Integer end delimiter")
def createValue(self):
"""Read integer value (may raise ValueError)"""
return int(self["value"].value)
class TorrentString(FieldSet):
# <string length encoded in base ten ASCII>:<string data>
def createFields(self):
addr = self.absolute_address
len = self.stream.searchBytesLength(':', False, addr, addr+(MAX_STRING_LENGTH+1)*8)
if len is None:
raise ParserError("Torrent: unable to find string separator (':')")
if not len:
raise ParserError("Torrent: error: no string length!")
val = String(self, "length", len, "String length")
yield val
try:
len = int(val.value)
except ValueError:
len = -1
if len < 0:
raise ParserError("Invalid string length (%s)" % makePrintable(val.value, "ASCII", to_unicode=True))
yield String(self, "separator", 1, "String length/value separator")
if not len:
self.info("Empty string: len=%i" % len)
return
if len<512:
yield String(self, "value", len, "String value", charset="ISO-8859-1")
else:
# Probably raw data
yield RawBytes(self, "value", len, "Raw data")
def createValue(self):
if "value" in self:
field = self["value"]
if field.__class__ != RawBytes:
return field.value
else:
return None
else:
return None
class Dictionary(FieldSet):
# d<bencoded string><bencoded element>e
def createFields(self):
yield String(self, "start", 1, "Dictionary start delimiter (d)", charset="ASCII")
while self.stream.readBytes(self.absolute_address+self.current_size, 1) != "e":
yield DictionaryItem(self, "item[]")
yield String(self, "end", 1, "Dictionary end delimiter")
class List(FieldSet):
# l<bencoded values>e
def createFields(self):
yield String(self, "start", 1, "List start delimiter")
while self.stream.readBytes(self.absolute_address+self.current_size, 1) != "e":
yield Entry(self, "item[]")
yield String(self, "end", 1, "List end delimiter")
class DictionaryItem(FieldSet):
def __init__(self, *args):
FieldSet.__init__(self, *args)
# TODO: Remove this because it's not lazy?
key = self["key"]
if not key.hasValue():
return
key = key.value
self._name = str(key).replace(" ", "_")
def createDisplay(self):
if not self["value"].hasValue():
return None
if self._name in ("length", "piece_length"):
return humanFilesize(self.value)
return FieldSet.createDisplay(self)
def createValue(self):
if not self["value"].hasValue():
return None
if self._name == "creation_date":
return self.createTimestampValue()
else:
return self["value"].value
def createFields(self):
yield Entry(self, "key")
yield Entry(self, "value")
def createTimestampValue(self):
return timestampUNIX(self["value"].value)
# Map first chunk byte => type
TAGS = {'d': Dictionary, 'i': Integer, 'l': List}
for index in xrange(1, 9+1):
TAGS[str(index)] = TorrentString
# Create an entry
def Entry(parent, name):
addr = parent.absolute_address + parent.current_size
tag = parent.stream.readBytes(addr, 1)
if tag not in TAGS:
raise ParserError("Torrent: Entry of type %r not handled" % type)
cls = TAGS[tag]
return cls(parent, name)
class TorrentFile(Parser):
endian = LITTLE_ENDIAN
MAGIC = "d8:announce"
PARSER_TAGS = {
"id": "torrent",
"category": "misc",
"file_ext": ("torrent",),
"min_size": 50*8,
"mime": (u"application/x-bittorrent",),
"magic": ((MAGIC, 0),),
"description": "Torrent metainfo file"
}
def validate(self):
if self.stream.readBytes(0, len(self.MAGIC)) != self.MAGIC:
return "Invalid magic"
return True
def createFields(self):
yield Dictionary(self, "root", size=self.size)