addon/lib/megaserver/client.py

import base64, json, random, struct, time, sys, traceback
if sys.version_info[0] >= 3:
    import urllib.request as urllib
    xrange = range
else:
    import urllib

from core import httptools
from threading import Thread

from file import File
from handler import Handler
from platformcode import logger
from server import Server


class Client(object):
    VIDEO_EXTS = {'.avi': 'video/x-msvideo', '.mp4': 'video/mp4', '.mkv': 'video/x-matroska',
                  '.m4v': 'video/mp4', '.mov': 'video/quicktime', '.mpg': 'video/mpeg','.ogv': 'video/ogg',
                  '.ogg': 'video/ogg', '.webm': 'video/webm', '.ts': 'video/mp2t', '.3gp': 'video/3gpp'}

    def __init__(self, url, port=None, ip=None, auto_shutdown=True, wait_time=20, timeout=5, is_playing_fnc=None):

        self.port = port if port else random.randint(8000,8099)
        self.ip = ip if ip else "127.0.0.1"
        self.connected = False
        self.start_time = None
        self.last_connect = None
        self.is_playing_fnc = is_playing_fnc
        self.auto_shutdown =  auto_shutdown
        self.wait_time =  wait_time
        self.timeout =  timeout
        self.running = False
        self.file = None
        self.files = []

        self._server = Server((self.ip, self.port), Handler, client=self)
        self.add_url(url)
        self.start()

    def start(self):
        self.start_time = time.time()
        self.running = True
        self._server.run()
        t= Thread(target=self._auto_shutdown)
        t.setDaemon(True)
        t.start()
        logger.info("MEGA Server Started")

    def _auto_shutdown(self):
        while self.running:
            time.sleep(1)
            if self.file and self.file.cursor:
                self.last_connect = time.time()

            if self.is_playing_fnc and  self.is_playing_fnc():
                self.last_connect = time.time()

            if self.auto_shutdown:
                #shudown por haber cerrado el reproductor
                if self.connected and self.last_connect and self.is_playing_fnc and not self.is_playing_fnc():
                    if time.time() - self.last_connect - 1 > self.timeout:
                        self.stop()

                #shutdown por no realizar ninguna conexion
                if (not self.file or not self.file.cursor) and self.start_time and self.wait_time and not self.connected:
                    if time.time() - self.start_time - 1 > self.wait_time:
                        self.stop()

                #shutdown tras la ultima conexion
                if (not self.file or not self.file.cursor) and self.timeout and self.connected and self.last_connect and not self.is_playing_fnc:
                    if time.time() - self.last_connect - 1 > self.timeout:
                        self.stop()

    def stop(self):
        self.running = False
        self._server.stop()
        logger.info("MEGA Server Stopped")

    def get_play_list(self):
        if len(self.files) > 1:
            return "http://" + self.ip + ":" + str(self.port) + "/playlist.pls"
        else:
            return "http://" + self.ip + ":" + str(self.port) + "/" + urllib.quote(self.files[0].name.encode("utf8"))

    def get_files(self):
        files = []
        enc_url = None
        if self.files:
            for file in self.files:
                n = file.name.encode("utf8")
                u = "http://" + self.ip + ":" + str(self.port) + "/" + urllib.quote(n)
                s = file.size
                file_id = file.file_id
                enc_url = file.url
                files.append({"name":n,"url":u,"size":s, "id": file_id})
        if len(self.files) == 1:
            try:
                code = httptools.downloadpage(enc_url, only_headers=True).code
                if code > 300:
                    return code
                else:
                    return files

            except:
                logger.info(traceback.format_exc())
                pass

        return files

    def add_url(self, url):
        url = url.split("#")[1]
        id_video = None
        if "|" in url:
            url, id_video = url.split("|")
        if url.startswith("F!"):
            if len(url.split("!")) ==3:
                folder_id = url.split("!")[1]
                folder_key = url.split("!")[2]
                master_key = self.base64_to_a32(folder_key)
                files = self.api_req({"a":"f","c":1,"r":1},"&n="+folder_id)
                for file in files["f"]:
                 if file["t"] == 0:
                    if id_video and id_video != file["h"]:
                        continue
                    key = file['k'][file['k'].index(':') + 1:]
                    key = self.decrypt_key(self.base64_to_a32(key), master_key)
                    k = (key[0] ^ key[4], key[1] ^ key[5], key[2] ^ key[6], key[3] ^ key[7])
                    attributes = self.base64urldecode(file['a'])
                    attributes = self.dec_attr(attributes, k)
                    self.files.append(File(info=attributes, file_id=file["h"], key=key, folder_id=folder_id, file= file, client = self ))
            else:
                raise Exception("Enlace no valido")

        elif url.startswith("!") or url.startswith("N!"):
            if len(url.split("!")) ==3:
                file_id = url.split("!")[1]
                file_key = url.split("!")[2]
                file = self.api_req({'a': 'g', 'g': 1, 'p': file_id})
                key = self.base64_to_a32(file_key)
                k = (key[0] ^ key[4], key[1] ^ key[5], key[2] ^ key[6], key[3] ^ key[7])
                attributes = self.base64urldecode(file['at'])
                attributes = self.dec_attr(attributes, k)
                self.files.append(File(info=attributes, file_id=file_id, key=key, file= file, client = self))
            else:
                raise Exception("Enlace no valido")
        else:
            raise Exception("Enlace no valido")

    def api_req(self, req, get=""):
        seqno = random.randint(0, 0xFFFFFFFF)
        url = 'https://g.api.mega.co.nz/cs?id=%d%s' % (seqno, get)
        page = httptools.downloadpage(url, post=json.dumps([req])).data
        return json.loads(page)[0]

    def base64urldecode(self,data):
      data += '=='[(2 - len(data) * 3) % 4:]
      for search, replace in (('-', '+'), ('_', '/'), (',', '')):
        data = data.replace(search, replace)
      return base64.b64decode(data)

    def base64urlencode(self,data):
      data = base64.b64encode(data)
      for search, replace in (('+', '-'), ('/', '_'), ('=', '')):
        data = data.replace(search, replace)
      return data

    def a32_to_str(self,a):
      return struct.pack('>%dI' % len(a), *a)

    def str_to_a32(self,b):
      if len(b) % 4: # Add padding, we need a string with a length multiple of 4
        b += '\0' * (4 - len(b) % 4)
      return struct.unpack('>%dI' % (len(b) / 4), b)

    def base64_to_a32(self,s):
      return self.str_to_a32(self.base64urldecode(s))

    def a32_to_base64(self,a):
      return self.base64urlencode(self.a32_to_str(a))

    def aes_cbc_decrypt(self, data, key):
        try:
            from Cryptodome.Cipher import AES
        except:
            from Crypto.Cipher import AES
        decryptor = AES.new(key, AES.MODE_CBC, '\0' * 16)
        return decryptor.decrypt(data)

    def aes_cbc_decrypt_a32(self,data, key):
      return self.str_to_a32(self.aes_cbc_decrypt(self.a32_to_str(data), self.a32_to_str(key)))

    def decrypt_key(self,a, key):
      return sum((self.aes_cbc_decrypt_a32(a[i:i+4], key) for i in xrange(0, len(a), 4)), ())

    def dec_attr(self, attr, key):
      attr = self.aes_cbc_decrypt(attr, self.a32_to_str(key)).rstrip('\0')
      if not attr.endswith("}"):
        attr = attr.rsplit("}", 1)[0] + "}"
      return json.loads(attr[4:]) if attr[:6] == 'MEGA{"' else False