mirror of
https://github.com/LonamiWebs/Telethon.git
synced 2024-11-25 19:03:46 +03:00
904 lines
33 KiB
Python
904 lines
33 KiB
Python
import datetime
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import io
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import os
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import pathlib
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import typing
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import inspect
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from ..crypto import AES
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from .. import utils, helpers, errors, hints
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from ..requestiter import RequestIter
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from ..tl import TLObject, types, functions
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try:
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import aiohttp
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except ImportError:
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aiohttp = None
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if typing.TYPE_CHECKING:
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from .telegramclient import TelegramClient
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# Chunk sizes for upload.getFile must be multiples of the smallest size
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MIN_CHUNK_SIZE = 4096
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MAX_CHUNK_SIZE = 512 * 1024
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class _DirectDownloadIter(RequestIter):
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async def _init(
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self, file, dc_id, offset, stride, chunk_size, request_size, file_size
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):
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self.request = functions.upload.GetFileRequest(
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file, offset=offset, limit=request_size)
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self.total = file_size
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self._stride = stride
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self._chunk_size = chunk_size
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self._last_part = None
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self._exported = dc_id and self.client.session.dc_id != dc_id
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if not self._exported:
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# The used sender will also change if ``FileMigrateError`` occurs
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self._sender = self.client._sender
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else:
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try:
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self._sender = await self.client._borrow_exported_sender(dc_id)
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except errors.DcIdInvalidError:
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# Can't export a sender for the ID we are currently in
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config = await self.client(functions.help.GetConfigRequest())
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for option in config.dc_options:
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if option.ip_address == self.client.session.server_address:
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self.client.session.set_dc(
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option.id, option.ip_address, option.port)
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self.client.session.save()
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break
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# TODO Figure out why the session may have the wrong DC ID
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self._sender = self.client._sender
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self._exported = False
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async def _load_next_chunk(self):
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cur = await self._request()
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self.buffer.append(cur)
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if len(cur) < self.request.limit:
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self.left = len(self.buffer)
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await self.close()
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else:
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self.request.offset += self._stride
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async def _request(self):
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try:
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result = await self._sender.send(self.request)
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if isinstance(result, types.upload.FileCdnRedirect):
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raise NotImplementedError # TODO Implement
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else:
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return result.bytes
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except errors.FileMigrateError as e:
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self.client._log[__name__].info('File lives in another DC')
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self._sender = await self.client._borrow_exported_sender(e.new_dc)
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self._exported = True
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return await self._request()
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async def close(self):
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if not self._sender:
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return
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try:
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if self._exported:
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await self.client._return_exported_sender(self._sender)
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elif self._sender != self.client._sender:
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await self._sender.disconnect()
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finally:
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self._sender = None
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async def __aenter__(self):
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return self
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async def __aexit__(self, *args):
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await self.close()
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__enter__ = helpers._sync_enter
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__exit__ = helpers._sync_exit
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class _GenericDownloadIter(_DirectDownloadIter):
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async def _load_next_chunk(self, mask=MIN_CHUNK_SIZE - 1):
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# 1. Fetch enough for one chunk
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data = b''
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# 1.1. ``bad`` is how much into the data we have we need to offset
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bad = self.request.offset & mask
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before = self.request.offset
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# 1.2. We have to fetch from a valid offset, so remove that bad part
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self.request.offset -= bad
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done = False
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while not done and len(data) - bad < self._chunk_size:
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cur = await self._request()
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self.request.offset += self.request.limit
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data += cur
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done = len(cur) < self.request.limit
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# 1.3 Restore our last desired offset
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self.request.offset = before
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# 2. Fill the buffer with the data we have
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# 2.1. Slicing `bytes` is expensive, yield `memoryview` instead
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mem = memoryview(data)
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# 2.2. The current chunk starts at ``bad`` offset into the data,
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# and each new chunk is ``stride`` bytes apart of the other
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for i in range(bad, len(data), self._stride):
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self.buffer.append(mem[i:i + self._chunk_size])
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# 2.3. We will yield this offset, so move to the next one
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self.request.offset += self._stride
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# 2.4. If we are in the last chunk, we will return the last partial data
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if done:
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self.left = len(self.buffer)
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await self.close()
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return
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# 2.5. If we are not done, we can't return incomplete chunks.
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if len(self.buffer[-1]) != self._chunk_size:
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self._last_part = self.buffer.pop().tobytes()
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# 3. Be careful with the offsets. Re-fetching a bit of data
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# is fine, since it greatly simplifies things.
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# TODO Try to not re-fetch data
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self.request.offset -= self._stride
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class DownloadMethods:
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# region Public methods
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async def download_profile_photo(
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self: 'TelegramClient',
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entity: 'hints.EntityLike',
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file: 'hints.FileLike' = None,
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*,
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download_big: bool = True) -> typing.Optional[str]:
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"""
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Downloads the profile photo from the given user, chat or channel.
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Arguments
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entity (`entity`):
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From who the photo will be downloaded.
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.. note::
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This method expects the full entity (which has the data
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to download the photo), not an input variant.
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It's possible that sometimes you can't fetch the entity
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from its input (since you can get errors like
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``ChannelPrivateError``) but you already have it through
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another call, like getting a forwarded message from it.
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file (`str` | `file`, optional):
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The output file path, directory, or stream-like object.
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If the path exists and is a file, it will be overwritten.
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If file is the type `bytes`, it will be downloaded in-memory
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as a bytestring (e.g. ``file=bytes``).
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download_big (`bool`, optional):
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Whether to use the big version of the available photos.
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Returns
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`None` if no photo was provided, or if it was Empty. On success
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the file path is returned since it may differ from the one given.
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Example
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.. code-block:: python
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# Download your own profile photo
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path = await client.download_profile_photo('me')
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print(path)
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"""
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# hex(crc32(x.encode('ascii'))) for x in
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# ('User', 'Chat', 'UserFull', 'ChatFull')
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ENTITIES = (0x2da17977, 0xc5af5d94, 0x1f4661b9, 0xd49a2697)
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# ('InputPeer', 'InputUser', 'InputChannel')
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INPUTS = (0xc91c90b6, 0xe669bf46, 0x40f202fd)
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if not isinstance(entity, TLObject) or entity.SUBCLASS_OF_ID in INPUTS:
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entity = await self.get_entity(entity)
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thumb = -1 if download_big else 0
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possible_names = []
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if entity.SUBCLASS_OF_ID not in ENTITIES:
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photo = entity
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else:
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if not hasattr(entity, 'photo'):
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# Special case: may be a ChatFull with photo:Photo
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# This is different from a normal UserProfilePhoto and Chat
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if not hasattr(entity, 'chat_photo'):
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return None
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return await self._download_photo(
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entity.chat_photo, file, date=None,
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thumb=thumb, progress_callback=None
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)
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for attr in ('username', 'first_name', 'title'):
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possible_names.append(getattr(entity, attr, None))
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photo = entity.photo
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if isinstance(photo, (types.UserProfilePhoto, types.ChatPhoto)):
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dc_id = photo.dc_id
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which = photo.photo_big if download_big else photo.photo_small
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loc = types.InputPeerPhotoFileLocation(
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peer=await self.get_input_entity(entity),
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local_id=which.local_id,
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volume_id=which.volume_id,
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big=download_big
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)
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else:
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# It doesn't make any sense to check if `photo` can be used
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# as input location, because then this method would be able
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# to "download the profile photo of a message", i.e. its
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# media which should be done with `download_media` instead.
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return None
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file = self._get_proper_filename(
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file, 'profile_photo', '.jpg',
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possible_names=possible_names
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)
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try:
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result = await self.download_file(loc, file, dc_id=dc_id)
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return result if file is bytes else file
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except errors.LocationInvalidError:
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# See issue #500, Android app fails as of v4.6.0 (1155).
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# The fix seems to be using the full channel chat photo.
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ie = await self.get_input_entity(entity)
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ty = helpers._entity_type(ie)
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if ty == helpers._EntityType.CHANNEL:
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full = await self(functions.channels.GetFullChannelRequest(ie))
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return await self._download_photo(
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full.full_chat.chat_photo, file,
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date=None, progress_callback=None,
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thumb=thumb
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)
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else:
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# Until there's a report for chats, no need to.
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return None
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async def download_media(
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self: 'TelegramClient',
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message: 'hints.MessageLike',
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file: 'hints.FileLike' = None,
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*,
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thumb: 'typing.Union[int, types.TypePhotoSize]' = None,
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progress_callback: 'hints.ProgressCallback' = None) -> typing.Optional[typing.Union[str, bytes]]:
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"""
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Downloads the given media from a message object.
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Note that if the download is too slow, you should consider installing
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``cryptg`` (through ``pip install cryptg``) so that decrypting the
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received data is done in C instead of Python (much faster).
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See also `Message.download_media() <telethon.tl.custom.message.Message.download_media>`.
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Arguments
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message (`Message <telethon.tl.custom.message.Message>` | :tl:`Media`):
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The media or message containing the media that will be downloaded.
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file (`str` | `file`, optional):
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The output file path, directory, or stream-like object.
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If the path exists and is a file, it will be overwritten.
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If file is the type `bytes`, it will be downloaded in-memory
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as a bytestring (e.g. ``file=bytes``).
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progress_callback (`callable`, optional):
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A callback function accepting two parameters:
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``(received bytes, total)``.
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thumb (`int` | :tl:`PhotoSize`, optional):
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Which thumbnail size from the document or photo to download,
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instead of downloading the document or photo itself.
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If it's specified but the file does not have a thumbnail,
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this method will return `None`.
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The parameter should be an integer index between ``0`` and
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``len(sizes)``. ``0`` will download the smallest thumbnail,
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and ``len(sizes) - 1`` will download the largest thumbnail.
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You can also use negative indices.
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You can also pass the :tl:`PhotoSize` instance to use.
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In short, use ``thumb=0`` if you want the smallest thumbnail
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and ``thumb=-1`` if you want the largest thumbnail.
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Returns
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`None` if no media was provided, or if it was Empty. On success
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the file path is returned since it may differ from the one given.
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Example
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.. code-block:: python
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path = await client.download_media(message)
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await client.download_media(message, filename)
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# or
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path = await message.download_media()
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await message.download_media(filename)
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# Printing download progress
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def callback(current, total):
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print('Downloaded', current, 'out of', total,
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'bytes: {:.2%}'.format(current / total))
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await client.download_media(message, progress_callback=callback)
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"""
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# TODO This won't work for messageService
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if isinstance(message, types.Message):
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date = message.date
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media = message.media
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else:
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date = datetime.datetime.now()
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media = message
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if isinstance(media, str):
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media = utils.resolve_bot_file_id(media)
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if isinstance(media, types.MessageMediaWebPage):
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if isinstance(media.webpage, types.WebPage):
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media = media.webpage.document or media.webpage.photo
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if isinstance(media, (types.MessageMediaPhoto, types.Photo)):
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return await self._download_photo(
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media, file, date, thumb, progress_callback
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)
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elif isinstance(media, (types.MessageMediaDocument, types.Document)):
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return await self._download_document(
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media, file, date, thumb, progress_callback
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)
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elif isinstance(media, types.MessageMediaContact) and thumb is None:
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return self._download_contact(
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media, file
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)
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elif isinstance(media, (types.WebDocument, types.WebDocumentNoProxy)) and thumb is None:
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return await self._download_web_document(
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media, file, progress_callback
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)
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async def download_file(
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self: 'TelegramClient',
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input_location: 'hints.FileLike',
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file: 'hints.OutFileLike' = None,
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*,
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part_size_kb: float = None,
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file_size: int = None,
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progress_callback: 'hints.ProgressCallback' = None,
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dc_id: int = None,
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key: bytes = None,
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iv: bytes = None) -> typing.Optional[bytes]:
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"""
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Low-level method to download files from their input location.
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.. note::
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Generally, you should instead use `download_media`.
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This method is intended to be a bit more low-level.
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Arguments
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input_location (:tl:`InputFileLocation`):
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The file location from which the file will be downloaded.
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See `telethon.utils.get_input_location` source for a complete
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list of supported types.
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file (`str` | `file`, optional):
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The output file path, directory, or stream-like object.
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If the path exists and is a file, it will be overwritten.
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If the file path is `None` or `bytes`, then the result
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will be saved in memory and returned as `bytes`.
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part_size_kb (`int`, optional):
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Chunk size when downloading files. The larger, the less
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requests will be made (up to 512KB maximum).
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file_size (`int`, optional):
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The file size that is about to be downloaded, if known.
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Only used if ``progress_callback`` is specified.
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progress_callback (`callable`, optional):
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A callback function accepting two parameters:
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``(downloaded bytes, total)``. Note that the
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``total`` is the provided ``file_size``.
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dc_id (`int`, optional):
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The data center the library should connect to in order
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to download the file. You shouldn't worry about this.
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key ('bytes', optional):
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In case of an encrypted upload (secret chats) a key is supplied
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iv ('bytes', optional):
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In case of an encrypted upload (secret chats) an iv is supplied
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|
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Example
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.. code-block:: python
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# Download a file and print its header
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data = await client.download_file(input_file, bytes)
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print(data[:16])
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"""
|
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if not part_size_kb:
|
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if not file_size:
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part_size_kb = 64 # Reasonable default
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else:
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part_size_kb = utils.get_appropriated_part_size(file_size)
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part_size = int(part_size_kb * 1024)
|
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if part_size % MIN_CHUNK_SIZE != 0:
|
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raise ValueError(
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'The part size must be evenly divisible by 4096.')
|
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|
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in_memory = file is None or file is bytes
|
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if in_memory:
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f = io.BytesIO()
|
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elif isinstance(file, str):
|
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# Ensure that we'll be able to download the media
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helpers.ensure_parent_dir_exists(file)
|
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f = open(file, 'wb')
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else:
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f = file
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try:
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async for chunk in self.iter_download(
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input_location, request_size=part_size, dc_id=dc_id):
|
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if iv and key:
|
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chunk = AES.decrypt_ige(chunk, key, iv)
|
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r = f.write(chunk)
|
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if inspect.isawaitable(r):
|
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await r
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|
|
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if progress_callback:
|
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r = progress_callback(f.tell(), file_size)
|
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if inspect.isawaitable(r):
|
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await r
|
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|
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# Not all IO objects have flush (see #1227)
|
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if callable(getattr(f, 'flush', None)):
|
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f.flush()
|
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|
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if in_memory:
|
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return f.getvalue()
|
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finally:
|
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if isinstance(file, str) or in_memory:
|
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f.close()
|
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|
|
def iter_download(
|
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self: 'TelegramClient',
|
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file: 'hints.FileLike',
|
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*,
|
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offset: int = 0,
|
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stride: int = None,
|
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limit: int = None,
|
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chunk_size: int = None,
|
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request_size: int = MAX_CHUNK_SIZE,
|
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file_size: int = None,
|
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dc_id: int = None
|
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):
|
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"""
|
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Iterates over a file download, yielding chunks of the file.
|
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|
|
This method can be used to stream files in a more convenient
|
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way, since it offers more control (pausing, resuming, etc.)
|
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|
|
.. note::
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|
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Using a value for `offset` or `stride` which is not a multiple
|
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of the minimum allowed `request_size`, or if `chunk_size` is
|
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different from `request_size`, the library will need to do a
|
|
bit more work to fetch the data in the way you intend it to.
|
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|
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You normally shouldn't worry about this.
|
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|
|
Arguments
|
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file (`hints.FileLike`):
|
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The file of which contents you want to iterate over.
|
|
|
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offset (`int`, optional):
|
|
The offset in bytes into the file from where the
|
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download should start. For example, if a file is
|
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1024KB long and you just want the last 512KB, you
|
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would use ``offset=512 * 1024``.
|
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|
|
stride (`int`, optional):
|
|
The stride of each chunk (how much the offset should
|
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advance between reading each chunk). This parameter
|
|
should only be used for more advanced use cases.
|
|
|
|
It must be bigger than or equal to the `chunk_size`.
|
|
|
|
limit (`int`, optional):
|
|
The limit for how many *chunks* will be yielded at most.
|
|
|
|
chunk_size (`int`, optional):
|
|
The maximum size of the chunks that will be yielded.
|
|
Note that the last chunk may be less than this value.
|
|
By default, it equals to `request_size`.
|
|
|
|
request_size (`int`, optional):
|
|
How many bytes will be requested to Telegram when more
|
|
data is required. By default, as many bytes as possible
|
|
are requested. If you would like to request data in
|
|
smaller sizes, adjust this parameter.
|
|
|
|
Note that values outside the valid range will be clamped,
|
|
and the final value will also be a multiple of the minimum
|
|
allowed size.
|
|
|
|
file_size (`int`, optional):
|
|
If the file size is known beforehand, you should set
|
|
this parameter to said value. Depending on the type of
|
|
the input file passed, this may be set automatically.
|
|
|
|
dc_id (`int`, optional):
|
|
The data center the library should connect to in order
|
|
to download the file. You shouldn't worry about this.
|
|
|
|
Yields
|
|
|
|
`bytes` objects representing the chunks of the file if the
|
|
right conditions are met, or `memoryview` objects instead.
|
|
|
|
Example
|
|
.. code-block:: python
|
|
|
|
# Streaming `media` to an output file
|
|
# After the iteration ends, the sender is cleaned up
|
|
with open('photo.jpg', 'wb') as fd:
|
|
async for chunk client.iter_download(media):
|
|
fd.write(chunk)
|
|
|
|
# Fetching only the header of a file (32 bytes)
|
|
# You should manually close the iterator in this case.
|
|
#
|
|
# telethon.sync must be imported for this to work,
|
|
# and you must not be inside an "async def".
|
|
stream = client.iter_download(media, request_size=32)
|
|
header = next(stream)
|
|
stream.close()
|
|
assert len(header) == 32
|
|
|
|
# Fetching only the header, inside of an ``async def``
|
|
async def main():
|
|
stream = client.iter_download(media, request_size=32)
|
|
header = await stream.__anext__()
|
|
await stream.close()
|
|
assert len(header) == 32
|
|
"""
|
|
info = utils._get_file_info(file)
|
|
if info.dc_id is not None:
|
|
dc_id = info.dc_id
|
|
|
|
if file_size is None:
|
|
file_size = info.size
|
|
|
|
file = info.location
|
|
|
|
if chunk_size is None:
|
|
chunk_size = request_size
|
|
|
|
if limit is None and file_size is not None:
|
|
limit = (file_size + chunk_size - 1) // chunk_size
|
|
|
|
if stride is None:
|
|
stride = chunk_size
|
|
elif stride < chunk_size:
|
|
raise ValueError('stride must be >= chunk_size')
|
|
|
|
request_size -= request_size % MIN_CHUNK_SIZE
|
|
if request_size < MIN_CHUNK_SIZE:
|
|
request_size = MIN_CHUNK_SIZE
|
|
elif request_size > MAX_CHUNK_SIZE:
|
|
request_size = MAX_CHUNK_SIZE
|
|
|
|
if chunk_size == request_size \
|
|
and offset % MIN_CHUNK_SIZE == 0 \
|
|
and stride % MIN_CHUNK_SIZE == 0:
|
|
cls = _DirectDownloadIter
|
|
self._log[__name__].info('Starting direct file download in chunks of '
|
|
'%d at %d, stride %d', request_size, offset, stride)
|
|
else:
|
|
cls = _GenericDownloadIter
|
|
self._log[__name__].info('Starting indirect file download in chunks of '
|
|
'%d at %d, stride %d', request_size, offset, stride)
|
|
|
|
return cls(
|
|
self,
|
|
limit,
|
|
file=file,
|
|
dc_id=dc_id,
|
|
offset=offset,
|
|
stride=stride,
|
|
chunk_size=chunk_size,
|
|
request_size=request_size,
|
|
file_size=file_size
|
|
)
|
|
|
|
# endregion
|
|
|
|
# region Private methods
|
|
|
|
@staticmethod
|
|
def _get_thumb(thumbs, thumb):
|
|
if thumb is None:
|
|
return thumbs[-1]
|
|
elif isinstance(thumb, int):
|
|
return thumbs[thumb]
|
|
elif isinstance(thumb, (types.PhotoSize, types.PhotoCachedSize,
|
|
types.PhotoStrippedSize)):
|
|
return thumb
|
|
else:
|
|
return None
|
|
|
|
def _download_cached_photo_size(self: 'TelegramClient', size, file):
|
|
# No need to download anything, simply write the bytes
|
|
if isinstance(size, types.PhotoStrippedSize):
|
|
data = utils.stripped_photo_to_jpg(size.bytes)
|
|
else:
|
|
data = size.bytes
|
|
|
|
if file is bytes:
|
|
return data
|
|
elif isinstance(file, str):
|
|
helpers.ensure_parent_dir_exists(file)
|
|
f = open(file, 'wb')
|
|
else:
|
|
f = file
|
|
|
|
try:
|
|
f.write(data)
|
|
finally:
|
|
if isinstance(file, str):
|
|
f.close()
|
|
return file
|
|
|
|
async def _download_photo(self: 'TelegramClient', photo, file, date, thumb, progress_callback):
|
|
"""Specialized version of .download_media() for photos"""
|
|
# Determine the photo and its largest size
|
|
if isinstance(photo, types.MessageMediaPhoto):
|
|
photo = photo.photo
|
|
if not isinstance(photo, types.Photo):
|
|
return
|
|
|
|
size = self._get_thumb(photo.sizes, thumb)
|
|
if not size or isinstance(size, types.PhotoSizeEmpty):
|
|
return
|
|
|
|
file = self._get_proper_filename(file, 'photo', '.jpg', date=date)
|
|
if isinstance(size, (types.PhotoCachedSize, types.PhotoStrippedSize)):
|
|
return self._download_cached_photo_size(size, file)
|
|
|
|
result = await self.download_file(
|
|
types.InputPhotoFileLocation(
|
|
id=photo.id,
|
|
access_hash=photo.access_hash,
|
|
file_reference=photo.file_reference,
|
|
thumb_size=size.type
|
|
),
|
|
file,
|
|
file_size=size.size,
|
|
progress_callback=progress_callback
|
|
)
|
|
return result if file is bytes else file
|
|
|
|
@staticmethod
|
|
def _get_kind_and_names(attributes):
|
|
"""Gets kind and possible names for :tl:`DocumentAttribute`."""
|
|
kind = 'document'
|
|
possible_names = []
|
|
for attr in attributes:
|
|
if isinstance(attr, types.DocumentAttributeFilename):
|
|
possible_names.insert(0, attr.file_name)
|
|
|
|
elif isinstance(attr, types.DocumentAttributeAudio):
|
|
kind = 'audio'
|
|
if attr.performer and attr.title:
|
|
possible_names.append('{} - {}'.format(
|
|
attr.performer, attr.title
|
|
))
|
|
elif attr.performer:
|
|
possible_names.append(attr.performer)
|
|
elif attr.title:
|
|
possible_names.append(attr.title)
|
|
elif attr.voice:
|
|
kind = 'voice'
|
|
|
|
return kind, possible_names
|
|
|
|
async def _download_document(
|
|
self, document, file, date, thumb, progress_callback):
|
|
"""Specialized version of .download_media() for documents."""
|
|
if isinstance(document, types.MessageMediaDocument):
|
|
document = document.document
|
|
if not isinstance(document, types.Document):
|
|
return
|
|
|
|
if thumb is None:
|
|
kind, possible_names = self._get_kind_and_names(document.attributes)
|
|
file = self._get_proper_filename(
|
|
file, kind, utils.get_extension(document),
|
|
date=date, possible_names=possible_names
|
|
)
|
|
size = None
|
|
else:
|
|
file = self._get_proper_filename(file, 'photo', '.jpg', date=date)
|
|
size = self._get_thumb(document.thumbs, thumb)
|
|
if isinstance(size, (types.PhotoCachedSize, types.PhotoStrippedSize)):
|
|
return self._download_cached_photo_size(size, file)
|
|
|
|
result = await self.download_file(
|
|
types.InputDocumentFileLocation(
|
|
id=document.id,
|
|
access_hash=document.access_hash,
|
|
file_reference=document.file_reference,
|
|
thumb_size=size.type if size else ''
|
|
),
|
|
file,
|
|
file_size=size.size if size else document.size,
|
|
progress_callback=progress_callback
|
|
)
|
|
|
|
return result if file is bytes else file
|
|
|
|
@classmethod
|
|
def _download_contact(cls, mm_contact, file):
|
|
"""
|
|
Specialized version of .download_media() for contacts.
|
|
Will make use of the vCard 4.0 format.
|
|
"""
|
|
first_name = mm_contact.first_name
|
|
last_name = mm_contact.last_name
|
|
phone_number = mm_contact.phone_number
|
|
|
|
# Remove these pesky characters
|
|
first_name = first_name.replace(';', '')
|
|
last_name = (last_name or '').replace(';', '')
|
|
result = (
|
|
'BEGIN:VCARD\n'
|
|
'VERSION:4.0\n'
|
|
'N:{f};{l};;;\n'
|
|
'FN:{f} {l}\n'
|
|
'TEL;TYPE=cell;VALUE=uri:tel:+{p}\n'
|
|
'END:VCARD\n'
|
|
).format(f=first_name, l=last_name, p=phone_number).encode('utf-8')
|
|
|
|
if file is bytes:
|
|
return result
|
|
elif isinstance(file, str):
|
|
file = cls._get_proper_filename(
|
|
file, 'contact', '.vcard',
|
|
possible_names=[first_name, phone_number, last_name]
|
|
)
|
|
f = open(file, 'wb')
|
|
else:
|
|
f = file
|
|
|
|
try:
|
|
f.write(result)
|
|
finally:
|
|
# Only close the stream if we opened it
|
|
if isinstance(file, str):
|
|
f.close()
|
|
|
|
return file
|
|
|
|
@classmethod
|
|
async def _download_web_document(cls, web, file, progress_callback):
|
|
"""
|
|
Specialized version of .download_media() for web documents.
|
|
"""
|
|
if not aiohttp:
|
|
raise ValueError(
|
|
'Cannot download web documents without the aiohttp '
|
|
'dependency install it (pip install aiohttp)'
|
|
)
|
|
|
|
# TODO Better way to get opened handles of files and auto-close
|
|
in_memory = file is bytes
|
|
if in_memory:
|
|
f = io.BytesIO()
|
|
elif isinstance(file, str):
|
|
kind, possible_names = cls._get_kind_and_names(web.attributes)
|
|
file = cls._get_proper_filename(
|
|
file, kind, utils.get_extension(web),
|
|
possible_names=possible_names
|
|
)
|
|
f = open(file, 'wb')
|
|
else:
|
|
f = file
|
|
|
|
try:
|
|
with aiohttp.ClientSession() as session:
|
|
# TODO Use progress_callback; get content length from response
|
|
# https://github.com/telegramdesktop/tdesktop/blob/c7e773dd9aeba94e2be48c032edc9a78bb50234e/Telegram/SourceFiles/ui/images.cpp#L1318-L1319
|
|
async with session.get(web.url) as response:
|
|
while True:
|
|
chunk = await response.content.read(128 * 1024)
|
|
if not chunk:
|
|
break
|
|
f.write(chunk)
|
|
finally:
|
|
if isinstance(file, str) or file is bytes:
|
|
f.close()
|
|
|
|
return f.getvalue() if in_memory else file
|
|
|
|
@staticmethod
|
|
def _get_proper_filename(file, kind, extension,
|
|
date=None, possible_names=None):
|
|
"""Gets a proper filename for 'file', if this is a path.
|
|
|
|
'kind' should be the kind of the output file (photo, document...)
|
|
'extension' should be the extension to be added to the file if
|
|
the filename doesn't have any yet
|
|
'date' should be when this file was originally sent, if known
|
|
'possible_names' should be an ordered list of possible names
|
|
|
|
If no modification is made to the path, any existing file
|
|
will be overwritten.
|
|
If any modification is made to the path, this method will
|
|
ensure that no existing file will be overwritten.
|
|
"""
|
|
if isinstance(file, pathlib.Path):
|
|
file = str(file.absolute())
|
|
|
|
if file is not None and not isinstance(file, str):
|
|
# Probably a stream-like object, we cannot set a filename here
|
|
return file
|
|
|
|
if file is None:
|
|
file = ''
|
|
elif os.path.isfile(file):
|
|
# Make no modifications to valid existing paths
|
|
return file
|
|
|
|
if os.path.isdir(file) or not file:
|
|
try:
|
|
name = None if possible_names is None else next(
|
|
x for x in possible_names if x
|
|
)
|
|
except StopIteration:
|
|
name = None
|
|
|
|
if not name:
|
|
if not date:
|
|
date = datetime.datetime.now()
|
|
name = '{}_{}-{:02}-{:02}_{:02}-{:02}-{:02}'.format(
|
|
kind,
|
|
date.year, date.month, date.day,
|
|
date.hour, date.minute, date.second,
|
|
)
|
|
file = os.path.join(file, name)
|
|
|
|
directory, name = os.path.split(file)
|
|
name, ext = os.path.splitext(name)
|
|
if not ext:
|
|
ext = extension
|
|
|
|
result = os.path.join(directory, name + ext)
|
|
if not os.path.isfile(result):
|
|
return result
|
|
|
|
i = 1
|
|
while True:
|
|
result = os.path.join(directory, '{} ({}){}'.format(name, i, ext))
|
|
if not os.path.isfile(result):
|
|
return result
|
|
i += 1
|
|
|
|
# endregion
|