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| #Thanks @DeletedFromEarth for helping in this journey | |
| import math | |
| import asyncio | |
| import logging | |
| from info import * | |
| from typing import Dict, Union | |
| from lazybot import work_loads | |
| from pyrogram import Client, utils, raw | |
| from .file_properties import get_file_ids | |
| from pyrogram.session import Session, Auth | |
| from pyrogram.errors import AuthBytesInvalid | |
| from server.exceptions import FIleNotFound | |
| from pyrogram.file_id import FileId, FileType, ThumbnailSource | |
| class ByteStreamer: | |
| def __init__(self, client: Client): | |
| """A custom class that holds the cache of a specific client and class functions. | |
| attributes: | |
| client: the client that the cache is for. | |
| cached_file_ids: a dict of cached file IDs. | |
| cached_file_properties: a dict of cached file properties. | |
| functions: | |
| generate_file_properties: returns the properties for a media of a specific message contained in Tuple. | |
| generate_media_session: returns the media session for the DC that contains the media file. | |
| yield_file: yield a file from telegram servers for streaming. | |
| This is a modified version of the <https://github.com/eyaadh/megadlbot_oss/blob/master/mega/telegram/utils/custom_download.py> | |
| Thanks to Eyaadh <https://github.com/eyaadh> | |
| """ | |
| self.clean_timer = 30 * 60 | |
| self.client: Client = client | |
| self.cached_file_ids: Dict[int, FileId] = {} | |
| asyncio.create_task(self.clean_cache()) | |
| async def get_file_properties(self, id: int) -> FileId: | |
| """ | |
| Returns the properties of a media of a specific message in a FIleId class. | |
| if the properties are cached, then it'll return the cached results. | |
| or it'll generate the properties from the Message ID and cache them. | |
| """ | |
| if id not in self.cached_file_ids: | |
| await self.generate_file_properties(id) | |
| logging.debug(f"Cached file properties for message with ID {id}") | |
| return self.cached_file_ids[id] | |
| async def generate_file_properties(self, id: int) -> FileId: | |
| """ | |
| Generates the properties of a media file on a specific message. | |
| returns ths properties in a FIleId class. | |
| """ | |
| file_id = await get_file_ids(self.client, LOG_CHANNEL, id) | |
| logging.debug(f"Generated file ID and Unique ID for message with ID {id}") | |
| if not file_id: | |
| logging.debug(f"Message with ID {id} not found") | |
| raise FIleNotFound | |
| self.cached_file_ids[id] = file_id | |
| logging.debug(f"Cached media message with ID {id}") | |
| return self.cached_file_ids[id] | |
| async def generate_media_session(self, client: Client, file_id: FileId) -> Session: | |
| """ | |
| Generates the media session for the DC that contains the media file. | |
| This is required for getting the bytes from Telegram servers. | |
| """ | |
| media_session = client.media_sessions.get(file_id.dc_id, None) | |
| if media_session is None: | |
| if file_id.dc_id != await client.storage.dc_id(): | |
| media_session = Session( | |
| client, | |
| file_id.dc_id, | |
| await Auth( | |
| client, file_id.dc_id, await client.storage.test_mode() | |
| ).create(), | |
| await client.storage.test_mode(), | |
| is_media=True, | |
| ) | |
| await media_session.start() | |
| for _ in range(6): | |
| exported_auth = await client.invoke( | |
| raw.functions.auth.ExportAuthorization(dc_id=file_id.dc_id) | |
| ) | |
| try: | |
| await media_session.send( | |
| raw.functions.auth.ImportAuthorization( | |
| id=exported_auth.id, bytes=exported_auth.bytes | |
| ) | |
| ) | |
| break | |
| except AuthBytesInvalid: | |
| logging.debug( | |
| f"Invalid authorization bytes for DC {file_id.dc_id}" | |
| ) | |
| continue | |
| else: | |
| await media_session.stop() | |
| raise AuthBytesInvalid | |
| else: | |
| media_session = Session( | |
| client, | |
| file_id.dc_id, | |
| await client.storage.auth_key(), | |
| await client.storage.test_mode(), | |
| is_media=True, | |
| ) | |
| await media_session.start() | |
| logging.debug(f"Created media session for DC {file_id.dc_id}") | |
| client.media_sessions[file_id.dc_id] = media_session | |
| else: | |
| logging.debug(f"Using cached media session for DC {file_id.dc_id}") | |
| return media_session | |
| async def get_location(file_id: FileId) -> Union[raw.types.InputPhotoFileLocation, | |
| raw.types.InputDocumentFileLocation, | |
| raw.types.InputPeerPhotoFileLocation,]: | |
| """ | |
| Returns the file location for the media file. | |
| """ | |
| file_type = file_id.file_type | |
| if file_type == FileType.CHAT_PHOTO: | |
| if file_id.chat_id > 0: | |
| peer = raw.types.InputPeerUser( | |
| user_id=file_id.chat_id, access_hash=file_id.chat_access_hash | |
| ) | |
| else: | |
| if file_id.chat_access_hash == 0: | |
| peer = raw.types.InputPeerChat(chat_id=-file_id.chat_id) | |
| else: | |
| peer = raw.types.InputPeerChannel( | |
| channel_id=utils.get_channel_id(file_id.chat_id), | |
| access_hash=file_id.chat_access_hash, | |
| ) | |
| location = raw.types.InputPeerPhotoFileLocation( | |
| peer=peer, | |
| volume_id=file_id.volume_id, | |
| local_id=file_id.local_id, | |
| big=file_id.thumbnail_source == ThumbnailSource.CHAT_PHOTO_BIG, | |
| ) | |
| elif file_type == FileType.PHOTO: | |
| location = raw.types.InputPhotoFileLocation( | |
| id=file_id.media_id, | |
| access_hash=file_id.access_hash, | |
| file_reference=file_id.file_reference, | |
| thumb_size=file_id.thumbnail_size, | |
| ) | |
| else: | |
| location = raw.types.InputDocumentFileLocation( | |
| id=file_id.media_id, | |
| access_hash=file_id.access_hash, | |
| file_reference=file_id.file_reference, | |
| thumb_size=file_id.thumbnail_size, | |
| ) | |
| return location | |
| async def yield_file( | |
| self, | |
| file_id: FileId, | |
| index: int, | |
| offset: int, | |
| first_part_cut: int, | |
| last_part_cut: int, | |
| part_count: int, | |
| chunk_size: int, | |
| ) -> Union[str, None]: | |
| """ | |
| Custom generator that yields the bytes of the media file. | |
| Modded from <https://github.com/eyaadh/megadlbot_oss/blob/master/mega/telegram/utils/custom_download.py#L20> | |
| Thanks to Eyaadh <https://github.com/eyaadh> | |
| """ | |
| client = self.client | |
| work_loads[index] += 1 | |
| logging.debug(f"Starting to yielding file with client {index}.") | |
| media_session = await self.generate_media_session(client, file_id) | |
| current_part = 1 | |
| location = await self.get_location(file_id) | |
| try: | |
| r = await media_session.send( | |
| raw.functions.upload.GetFile( | |
| location=location, offset=offset, limit=chunk_size | |
| ), | |
| ) | |
| if isinstance(r, raw.types.upload.File): | |
| while True: | |
| chunk = r.bytes | |
| if not chunk: | |
| break | |
| elif part_count == 1: | |
| yield chunk[first_part_cut:last_part_cut] | |
| elif current_part == 1: | |
| yield chunk[first_part_cut:] | |
| elif current_part == part_count: | |
| yield chunk[:last_part_cut] | |
| else: | |
| yield chunk | |
| current_part += 1 | |
| offset += chunk_size | |
| if current_part > part_count: | |
| break | |
| r = await media_session.send( | |
| raw.functions.upload.GetFile( | |
| location=location, offset=offset, limit=chunk_size | |
| ), | |
| ) | |
| except (TimeoutError, AttributeError): | |
| pass | |
| finally: | |
| logging.debug("Finished yielding file with {current_part} parts.") | |
| work_loads[index] -= 1 | |
| async def clean_cache(self) -> None: | |
| """ | |
| function to clean the cache to reduce memory usage | |
| """ | |
| while True: | |
| await asyncio.sleep(self.clean_timer) | |
| self.cached_file_ids.clear() | |
| logging.debug("Cleaned the cache") | |