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torrent.py
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torrent.py
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'''
RFC: https://wiki.theory.org/index.php/BitTorrentSpecification
'''
from datetime import datetime
import hashlib
import struct
import random
import requests
import bencoding
import utils
class File:
def __init__(self, filepath):
while True:
try:
self.filepath = filepath
f = open(filepath, "rb")
self.raw_torrent = f.read()
f.close()
self.torrent_header = bencoding.decode(self.raw_torrent)
self.announce = self.torrent_header[b"announce"].decode("utf-8")
torrent_info = self.torrent_header[b"info"]
m = hashlib.sha1()
m.update(bencoding.encode(torrent_info))
self.file_hash = m.digest()
break
except:
utils.sleep(150)
@property
def total_size(self):
size = 0
torrent_info = self.torrent_header[b"info"]
if b"files" in torrent_info:
# Multiple File Mode
for file_info in torrent_info[b"files"]:
size += file_info[b"length"]
else:
# Single File Mode
size = torrent_info[b"length"]
return size
@property
def name(self):
size = 0
torrent_info = self.torrent_header[b"info"]
return torrent_info[b"name"].decode("utf-8")
def __str__(self):
announce = self.torrent_header[b"announce"].decode("utf-8")
result = "Announce: %s\n" % announce
if b"creation date" in self.torrent_header:
creation_date = self.torrent_header[b"creation date"]
creation_date = datetime.fromtimestamp(creation_date)
result += "Date: %s\n" % creation_date.strftime("%Y/%m/%d %H:%M:%S")
if b"created by" in self.torrent_header:
created_by = self.torrent_header[b"created by"].decode("utf-8")
result += "Created by: %s\n" % created_by
if b"encoding" in self.torrent_header:
encoding = self.torrent_header[b"encoding"].decode("utf-8")
result += "Encoding: %s\n" % encoding
torrent_info = self.torrent_header[b"info"]
piece_len = torrent_info[b"piece length"]
result += "Piece len: %s\n" % utils.sizeof_fmt(piece_len)
pieces = len(torrent_info[b"pieces"]) / 20
result += "Pieces: %d\n" % pieces
torrent_name = torrent_info[b"name"].decode("utf-8")
result += "Name: %s\n" % torrent_name
piece_len = torrent_info[b"piece length"]
if b"files" in torrent_info:
# Multiple File Mode
result += "Files:\n"
for file_info in torrent_info[b"files"]:
fullpath = "/".join([x.decode("utf-8") for x in file_info[b"path"]])
result += " '%s' (%s)\n" % (fullpath,
utils.sizeof_fmt(file_info[b"length"]))
else:
# Single File Mode
result += "Length: %s\n" % utils.sizeof_fmt(torrent_info[b"length"])
if b"md5sum" in torrent_info:
result += "Md5: %s\n" % torrent_info[b"md5sum"]
return result
class Seeder:
HTTP_HEADERS = {
"Accept-Encoding": "gzip",
"User-Agent": "Deluge/2.0.3-2-201906121747-ubuntu18.04.1 libtorrent/1.1.5.0"
}
proxies = {
"http": "http://127.0.0.1:3128",
"https": "http://127.0.0.1:3128"
}
def __init__(self, torrent):
self.torrent = torrent
self.peer_id = "-DE13F0-" + utils.random_id(12)
self.download_key = utils.random_id(12)
self.port = random.randint(1025, 65535)
def load_peers(self):
i = 0
while True:
try:
tracker_url = self.torrent.announce
http_params = {
"info_hash": self.torrent.file_hash,
"peer_id": self.peer_id.encode("ascii"),
"port": self.port,
"uploaded": 0,
"downloaded": 0,
"left": self.torrent.total_size,
"event": "started",
"key": self.download_key,
"compact": 1,
"numwant": 200,
"supportcrypto": 1,
"no_peer_id": 1
}
req = requests.get(tracker_url, params=http_params, proxies=self.proxies, headers=self.HTTP_HEADERS, timeout=10)
self.info = bencoding.decode(req.content)
self.update_interval = self.info[b"interval"]
break
except:
i += 1
utils.sleep(60*i)
def upload(self, uploaded_bytes, downloaded_bytes):
i = 0
while True:
try:
tracker_url = self.torrent.announce
http_params = {
"info_hash": self.torrent.file_hash,
"peer_id": self.peer_id.encode("ascii"),
"port": self.port,
"uploaded": 0,
"downloaded": 0,
"left": self.torrent.total_size,
"key": self.download_key,
"compact": 1,
"numwant": 0,
"supportcrypto": 1,
"no_peer_id": 1
}
http_params["uploaded"] = uploaded_bytes
http_params["downloaded"] = downloaded_bytes
requests.get(tracker_url, params=http_params, proxies=self.proxies, headers=self.HTTP_HEADERS, timeout=10)
break
except:
i += 1
utils.sleep(60*i)
@property
def peers(self):
result = []
peers = self.info[b"peers"]
for i in range(len(peers)//6):
ip = peers[i:i+4]
ip = '.'.join("%d" %x for x in ip)
port = peers[i+4:i+6]
port = struct.unpack(">H", port)[0]
result.append("%s:%d\n" % (ip, port))
return result
def __str__(self):
result = "Peer ID: %s\n" % self.peer_id
result += "Key: %s\n" % self.download_key
result += "Port: %d\n" % self.port
result += "Update tracker interval: %ds" % self.update_interval
return result