81 lines
2.7 KiB
Python
Executable File
81 lines
2.7 KiB
Python
Executable File
import logging
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from aiohttp import web
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from telethon.tl.custom import Message
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from app.util import get_file_name
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from app.config import block_downloads
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from .base import BaseView
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log = logging.getLogger(__name__)
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class Download(BaseView):
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async def download_get(self, req: web.Request) -> web.Response:
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return await self.handle_request(req)
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async def download_head(self, req: web.Request) -> web.Response:
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return await self.handle_request(req, head=True)
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async def handle_request(
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self, req: web.Request, head: bool = False
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) -> web.Response:
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if block_downloads:
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return web.Response(status=403, text="403: Forbiden" if not head else None)
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file_id = int(req.match_info["id"])
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alias_id = req.match_info["chat"]
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chat = self.chat_ids[alias_id]
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chat_id = chat["chat_id"]
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try:
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message: Message = await self.client.get_messages(
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entity=chat_id, ids=file_id
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)
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except Exception:
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log.debug(f"Error in getting message {file_id} in {chat_id}", exc_info=True)
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message = None
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if not message or not message.file:
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log.debug(f"no result for {file_id} in {chat_id}")
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return web.Response(
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status=410,
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text="410: Gone. Access to the target resource is no longer available!"
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if not head
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else None,
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)
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media = message.media
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size = message.file.size
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file_name = get_file_name(message, quote_name=False)
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mime_type = message.file.mime_type
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try:
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offset = req.http_range.start or 0
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limit = req.http_range.stop or size
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if (limit > size) or (offset < 0) or (limit < offset):
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raise ValueError("range not in acceptable format")
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except ValueError:
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return web.Response(
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status=416,
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text="416: Range Not Satisfiable" if not head else None,
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headers={"Content-Range": f"bytes */{size}"},
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)
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if not head:
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body = self.client.download(media, size, offset, limit)
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log.info(
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f"Serving file in {message.id} (chat {chat_id}) ; Range: {offset} - {limit}"
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)
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else:
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body = None
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headers = {
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"Content-Type": mime_type,
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"Content-Range": f"bytes {offset}-{limit}/{size}",
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"Content-Length": str(limit - offset),
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"Accept-Ranges": "bytes",
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"Content-Disposition": f'attachment; filename="{file_name}"',
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}
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return web.Response(status=206 if offset else 200, body=body, headers=headers)
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