#!/usr/bin/env python # # A library that provides a Python interface to the Telegram Bot API # Copyright (C) 2015-2020 # Leandro Toledo de Souza # # This program is free software: you can redistribute it and/or modify # it under the terms of the GNU Lesser Public License as published by # the Free Software Foundation, either version 3 of the License, or # (at your option) any later version. # # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU Lesser Public License for more details. # # You should have received a copy of the GNU Lesser Public License # along with this program. If not, see [http://www.gnu.org/licenses/]. """This module contains an object that represents a Telegram File.""" from base64 import b64decode from os.path import basename import os from future.backports.urllib import parse as urllib_parse from telegram import TelegramObject from telegram.passport.credentials import decrypt class File(TelegramObject): """ This object represents a file ready to be downloaded. The file can be downloaded with :attr:`download`. It is guaranteed that the link will be valid for at least 1 hour. When the link expires, a new one can be requested by calling getFile. Note: Maximum file size to download is 20 MB Attributes: file_id (:obj:`str`): Unique identifier for this file. file_unique_id (:obj:`str`): Unique identifier for this file, which is supposed to be the same over time and for different bots. Can't be used to download or reuse the file. file_size (:obj:`str`): Optional. File size. file_path (:obj:`str`): Optional. File path. Use :attr:`download` to get the file. Args: file_id (:obj:`str`): Identifier for this file, which can be used to download or reuse the file. file_unique_id (:obj:`str`): Unique and the same over time and for different bots file identifier. file_size (:obj:`int`, optional): Optional. File size, if known. file_path (:obj:`str`, optional): File path. Use :attr:`download` to get the file. bot (:obj:`telegram.Bot`, optional): Bot to use with shortcut method. **kwargs (:obj:`dict`): Arbitrary keyword arguments. Note: If you obtain an instance of this class from :attr:`telegram.PassportFile.get_file`, then it will automatically be decrypted as it downloads when you call :attr:`download()`. """ def __init__(self, file_id, file_unique_id, bot=None, file_size=None, file_path=None, **kwargs): # Required self.file_id = str(file_id) self.file_unique_id = str(file_unique_id) # Optionals self.file_size = file_size self.file_path = file_path self.bot = bot self._credentials = None self._id_attrs = (self.file_unique_id,) @classmethod def de_json(cls, data, bot): if not data: return None return cls(bot=bot, **data) def download(self, custom_path=None, out=None, timeout=None): """ Download this file. By default, the file is saved in the current working directory with its original filename as reported by Telegram. If the file has no filename, it the file ID will be used as filename. If a :attr:`custom_path` is supplied, it will be saved to that path instead. If :attr:`out` is defined, the file contents will be saved to that object using the ``out.write`` method. Note: :attr:`custom_path` and :attr:`out` are mutually exclusive. Args: custom_path (:obj:`str`, optional): Custom path. out (:obj:`io.BufferedWriter`, optional): A file-like object. Must be opened for writing in binary mode, if applicable. timeout (:obj:`int` | :obj:`float`, optional): If this value is specified, use it as the read timeout from the server (instead of the one specified during creation of the connection pool). Returns: :obj:`str` | :obj:`io.BufferedWriter`: The same object as :attr:`out` if specified. Otherwise, returns the filename downloaded to. Raises: ValueError: If both :attr:`custom_path` and :attr:`out` are passed. """ if custom_path is not None and out is not None: raise ValueError('custom_path and out are mutually exclusive') # Convert any UTF-8 char into a url encoded ASCII string. url = self._get_encoded_url() if out: buf = self.bot.request.retrieve(url) if self._credentials: buf = decrypt(b64decode(self._credentials.secret), b64decode(self._credentials.hash), buf) out.write(buf) return out else: if custom_path: filename = custom_path elif self.file_path: filename = basename(self.file_path) else: filename = os.path.join(os.getcwd(), self.file_id) buf = self.bot.request.retrieve(url, timeout=timeout) if self._credentials: buf = decrypt(b64decode(self._credentials.secret), b64decode(self._credentials.hash), buf) with open(filename, 'wb') as fobj: fobj.write(buf) return filename def _get_encoded_url(self): """Convert any UTF-8 char in :obj:`File.file_path` into a url encoded ASCII string.""" sres = urllib_parse.urlsplit(self.file_path) return urllib_parse.urlunsplit(urllib_parse.SplitResult( sres.scheme, sres.netloc, urllib_parse.quote(sres.path), sres.query, sres.fragment)) def download_as_bytearray(self, buf=None): """Download this file and return it as a bytearray. Args: buf (:obj:`bytearray`, optional): Extend the given bytearray with the downloaded data. Returns: :obj:`bytearray`: The same object as :attr:`buf` if it was specified. Otherwise a newly allocated :obj:`bytearray`. """ if buf is None: buf = bytearray() buf.extend(self.bot.request.retrieve(self._get_encoded_url())) return buf def set_credentials(self, credentials): self._credentials = credentials