python-telegram-bot/telegram/files/file.py
2017-09-01 08:43:08 +02:00

109 lines
4.1 KiB
Python

#!/usr/bin/env python
#
# A library that provides a Python interface to the Telegram Bot API
# Copyright (C) 2015-2017
# Leandro Toledo de Souza <devs@python-telegram-bot.org>
#
# 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 os.path import basename
from future.backports.urllib import parse as urllib_parse
from telegram import TelegramObject
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_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`): Unique identifier for this file.
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.
"""
def __init__(self, file_id, bot=None, file_size=None, file_path=None, **kwargs):
# Required
self.file_id = str(file_id)
# Optionals
self.file_size = file_size
self.file_path = file_path
self.bot = bot
self._id_attrs = (self.file_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 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:
`custom_path` and `out` are mutually exclusive.
Args:
custom_path (:obj:`str`, optional): Custom path.
out (:obj:`object`, optional): A file-like object. Must be opened 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).
Raises:
ValueError: If both ``custom_path`` and ``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.
sres = urllib_parse.urlsplit(self.file_path)
url = urllib_parse.urlunsplit(urllib_parse.SplitResult(
sres.scheme, sres.netloc, urllib_parse.quote(sres.path), sres.query, sres.fragment))
if out:
buf = self.bot.request.retrieve(url)
out.write(buf)
else:
if custom_path:
filename = custom_path
else:
filename = basename(self.file_path)
self.bot.request.download(url, filename, timeout=timeout)