mirror of
https://github.com/pyrogram/pyrogram
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94 lines
3.3 KiB
Python
94 lines
3.3 KiB
Python
# Pyrogram - Telegram MTProto API Client Library for Python
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# Copyright (C) 2017-present Dan <https://github.com/delivrance>
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#
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# This file is part of Pyrogram.
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#
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# Pyrogram is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Lesser General Public License as published
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# by the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# Pyrogram is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Lesser General Public License for more details.
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#
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# You should have received a copy of the GNU Lesser General Public License
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# along with Pyrogram. If not, see <http://www.gnu.org/licenses/>.
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from typing import Union, Optional, BinaryIO
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import pyrogram
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from pyrogram import types
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from pyrogram.file_id import FileId
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class StreamMedia:
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async def stream_media(
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self: "pyrogram.Client",
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message: Union["types.Message", str],
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limit: int = 0,
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offset: int = 0
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) -> Optional[Union[str, BinaryIO]]:
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"""Stream the media from a message chunk by chunk.
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The chunk size is 1 MiB (1024 * 1024 bytes).
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Parameters:
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message (:obj:`~pyrogram.types.Message` | ``str``):
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Pass a Message containing the media, the media itself (message.audio, message.video, ...) or a file id
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as string.
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limit (``int``, *optional*):
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Limit the amount of chunks to stream.
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Defaults to 0 (stream the whole media).
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offset (``int``, *optional*):
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How many chunks to skip before starting to stream.
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Defaults to 0 (start from the beginning).
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Returns:
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``Generator``: A generator yielding bytes chunk by chunk
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Example:
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.. code-block:: python
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# Stream the whole media
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async for chunk in app.stream_media(message):
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print(len(chunk))
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# Stream the first 3 chunks only
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async for chunk in app.stream_media(message, limit=3):
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print(len(chunk))
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# Stream the last 3 chunks only
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import math
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chunks = math.ceil(message.document.file_size / 1024 / 1024)
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async for chunk in app.stream_media(message, offset=chunks - 3):
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print(len(chunk))
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"""
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available_media = ("audio", "document", "photo", "sticker", "animation", "video", "voice", "video_note",
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"new_chat_photo")
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if isinstance(message, types.Message):
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for kind in available_media:
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media = getattr(message, kind, None)
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if media is not None:
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break
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else:
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raise ValueError("This message doesn't contain any downloadable media")
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else:
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media = message
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if isinstance(media, str):
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file_id_str = media
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else:
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file_id_str = media.file_id
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file_id_obj = FileId.decode(file_id_str)
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file_size = getattr(media, "file_size", 0)
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async for chunk in self.get_file(file_id_obj, file_size, limit, offset):
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yield chunk
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