vvzvlad
309 lines
12 KiB
Python
309 lines
12 KiB
Python
import logging
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import os
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import mimetypes
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import asyncio
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import json
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import magic
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from datetime import datetime
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from contextlib import asynccontextmanager
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from pyrogram import errors
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from fastapi import FastAPI, HTTPException, Response, BackgroundTasks
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from fastapi.responses import HTMLResponse, FileResponse
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from telegram_client import TelegramClient
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from config import get_settings
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from rss_generator import generate_channel_rss
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from post_parser import PostParser
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logger = logging.getLogger(__name__)
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logger.setLevel(logging.INFO)
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if not logger.handlers:
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handler = logging.StreamHandler()
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handler.setFormatter(logging.Formatter('%(asctime)s - %(name)s - %(levelname)s - %(message)s'))
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logger.addHandler(handler)
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client = TelegramClient()
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Config = get_settings()
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@asynccontextmanager
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async def lifespan(_: FastAPI):
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await client.start()
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# Start background task
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background_task = asyncio.create_task(cache_media_files())
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yield
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# Cleanup
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background_task.cancel()
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try:
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await background_task
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except asyncio.CancelledError:
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pass
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await client.stop()
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app = FastAPI( title="Pyrogram Bridge", lifespan=lifespan)
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if __name__ == "__main__":
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import uvicorn
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uvicorn.run("api_server:app", host=Config["api_host"], port=Config["api_port"], reload=True)
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async def find_file_id_in_message(message, file_unique_id: str):
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"""Find file_id by checking all possible media types in message"""
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if message.photo and message.photo.file_unique_id == file_unique_id:
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return message.photo.file_id
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elif message.video and message.video.file_unique_id == file_unique_id:
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return message.video.file_id
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elif message.animation and message.animation.file_unique_id == file_unique_id:
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return message.animation.file_id
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elif message.video_note and message.video_note.file_unique_id == file_unique_id:
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return message.video_note.file_id
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elif message.audio and message.audio.file_unique_id == file_unique_id:
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return message.audio.file_id
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elif message.voice and message.voice.file_unique_id == file_unique_id:
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return message.voice.file_id
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elif message.sticker and message.sticker.file_unique_id == file_unique_id:
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return message.sticker.file_id
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elif message.web_page and message.web_page.photo and message.web_page.photo.file_unique_id == file_unique_id:
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return message.web_page.photo.file_id
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elif message.document and message.document.file_unique_id == file_unique_id:
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return message.document.file_id
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return None
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async def prepare_file_response(file_path: str):
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"""Prepare file response with proper headers"""
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if not os.path.exists(file_path):
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raise HTTPException(status_code=404, detail="File not found")
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# Try to determine MIME type using python-magic first
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try:
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mime = magic.Magic(mime=True)
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media_type = mime.from_file(file_path)
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except Exception as e:
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logger.warning(f"Failed to determine MIME type using python-magic: {str(e)}")
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media_type = None
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if not media_type: media_type, _ = mimetypes.guess_type(file_path) # Fallback to mimetypes if python-magic failed
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if not media_type: media_type = "application/octet-stream" # Final fallback to octet-stream
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logger.debug(f"Determined media type for {os.path.basename(file_path)}: {media_type}")
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headers = {"Content-Disposition": f"inline; filename={os.path.basename(file_path)}"}
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return FileResponse(path=file_path, media_type=media_type, headers=headers)
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async def download_media_file(channel: str, post_id: int, file_unique_id: str) -> str:
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"""
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Download media file from Telegram and save to cache
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Returns path to downloaded file
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"""
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cache_dir = os.path.abspath("./data/cache")
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cache_path = os.path.join(cache_dir, f"{channel}-{post_id}-{file_unique_id}")
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os.makedirs(cache_dir, exist_ok=True)
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if os.path.exists(cache_path):
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logger.info(f"Found cached media file: {cache_path}")
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# Update timestamp for existing file
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file_id = f"{channel}-{post_id}-{file_unique_id}"
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file_path = os.path.join(os.path.abspath("./data"), 'media_file_ids.json')
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try:
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if os.path.exists(file_path):
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with open(file_path, 'r', encoding='utf-8') as f:
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media_files = json.load(f)
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for file_data in media_files:
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if file_data['file_id'] == file_id:
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file_data['added'] = datetime.now().timestamp()
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break
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with open(file_path, 'w', encoding='utf-8') as f:
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json.dump(media_files, f, ensure_ascii=False, indent=2)
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except Exception as e:
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logger.error(f"Failed to update timestamp for {file_id}: {str(e)}")
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return cache_path
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message = await client.client.get_messages(channel, post_id)
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file_id = await find_file_id_in_message(message, file_unique_id)
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if not file_id:
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logger.error(f"Media with file_unique_id {file_unique_id} not found in message {post_id}")
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raise HTTPException(status_code=404, detail="File not found in message")
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file_path = await client.client.download_media(file_id, file_name=cache_path)
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logger.info(f"Downloaded media file {file_unique_id} to {cache_path}")
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return file_path
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async def remove_old_cached_files(media_files: list, cache_dir: str) -> tuple[list, int]:
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"""
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Remove files that haven't been accessed for more than 20 days
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Returns tuple of (updated media files list, number of removed files)
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"""
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current_time = datetime.now().timestamp()
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updated_media_files = []
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files_removed = 0
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for file_data in media_files:
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try:
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file_id = file_data.get('file_id')
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if not file_id:
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continue
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last_access_time = file_data.get('added', 0)
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days_since_access = (current_time - last_access_time) / (24 * 3600)
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if days_since_access > 20:
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channel, post_id_str, file_unique_id = file_id.split('-', 2)
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cache_path = os.path.join(cache_dir, f"{channel}-{post_id_str}-{file_unique_id}")
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if os.path.exists(cache_path):
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try:
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os.remove(cache_path)
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files_removed += 1
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logger.info(f"Removed old cached file: {cache_path}, last access {days_since_access:.1f} days ago")
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except Exception as e:
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logger.error(f"Failed to remove cached file {cache_path}: {str(e)}")
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updated_media_files.append(file_data)
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continue
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updated_media_files.append(file_data)
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except Exception as e:
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logger.error(f"Error processing cache entry {file_data}: {str(e)}")
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continue
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return updated_media_files, files_removed
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async def download_new_files(media_files: list, cache_dir: str):
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"""
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Download files that are not in cache yet
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"""
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for file_data in media_files:
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try:
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file_id = file_data['file_id']
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if not file_id:
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continue
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channel, post_id_str, file_unique_id = file_id.split('-', 2)
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post_id = int(post_id_str)
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cache_path = os.path.join(cache_dir, f"{channel}-{post_id}-{file_unique_id}")
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if not os.path.exists(cache_path):
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logger.debug(f"Background download started for {file_id}")
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await download_media_file(channel, post_id, file_unique_id)
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await asyncio.sleep(1) # Delay between downloads
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except Exception as e:
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logger.error(f"Background download failed for {file_id}: {str(e)}")
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continue
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async def cache_media_files():
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"""Background task for cache management: removes old files and downloads new ones"""
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delay = 60
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while True:
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try:
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file_path = os.path.join(os.path.abspath("./data"), 'media_file_ids.json')
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if not os.path.exists(file_path):
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await asyncio.sleep(delay)
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continue
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with open(file_path, 'r', encoding='utf-8') as f:
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media_files = json.load(f)
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cache_dir = os.path.abspath("./data/cache")
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updated_media_files, files_removed = await remove_old_cached_files(media_files, cache_dir)
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if files_removed > 0:
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try:
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with open(file_path, 'w', encoding='utf-8') as f:
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json.dump(updated_media_files, f, ensure_ascii=False, indent=2)
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logger.info(f"Removed {files_removed} old files from cache")
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except Exception as e:
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logger.error(f"Failed to update media_file_ids.json: {str(e)}")
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await download_new_files(updated_media_files, cache_dir)
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await asyncio.sleep(delay) # Check every delay seconds
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except Exception as e:
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logger.error(f"Cache media files error: {str(e)}")
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await asyncio.sleep(delay)
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@app.get("/html/{channel}/{post_id}", response_class=HTMLResponse)
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@app.get("/post/html/{channel}/{post_id}", response_class=HTMLResponse)
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async def get_post_html(channel: str, post_id: int):
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try:
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parser = PostParser(client.client)
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html_content = await parser.get_post(channel, post_id, 'html')
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if not html_content:
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raise HTTPException(status_code=404, detail="Post not found")
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return html_content
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except Exception as e:
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error_message = f"Failed to get HTML post for channel {channel}, post_id {post_id}: {str(e)}"
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logger.error(error_message)
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raise HTTPException(status_code=500, detail=error_message) from e
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@app.get("/json/{channel}/{post_id}")
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@app.get("/post/json/{channel}/{post_id}")
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async def get_post(channel: str, post_id: int):
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try:
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parser = PostParser(client.client)
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json_content = await parser.get_post(channel, post_id, 'json')
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if not json_content:
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raise HTTPException(status_code=404, detail="Post not found")
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return json_content
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except Exception as e:
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error_message = f"Failed to get JSON post for channel {channel}, post_id {post_id}: {str(e)}"
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logger.error(error_message)
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raise HTTPException(status_code=500, detail=error_message) from e
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@app.get("/health")
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async def health_check():
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try:
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me = await client.client.get_me()
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return {
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"status": "ok",
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"tg_connected": client.client.is_connected,
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"tg_name": me.username,
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"tg_id": me.id,
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"tg_phone": me.phone_number,
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"tg_first_name": me.first_name,
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"tg_last_name": me.last_name,
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}
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except Exception as e:
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error_message = f"Failed to get health check: {str(e)}"
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logger.error(error_message)
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raise HTTPException(status_code=500, detail=error_message) from e
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@app.get("/media/{channel}/{post_id}/{file_unique_id}")
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async def get_media(channel: str, post_id: int, file_unique_id: str):
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try:
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file_path = await download_media_file(channel, post_id, file_unique_id)
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return await prepare_file_response(file_path)
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except HTTPException:
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raise
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except errors.RPCError as e:
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logger.error(f"Media request RPC error for file_unique_id {file_unique_id} in message {post_id}: {type(e).__name__} - {str(e)}")
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raise HTTPException(status_code=404, detail="File not found in Telegram") from e
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except Exception as e:
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error_message = f"Failed to get media for file_unique_id {file_unique_id} in message {post_id}: {str(e)}"
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logger.error(error_message)
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raise HTTPException(status_code=500, detail=error_message) from e
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@app.get("/rss/{channel}", response_class=Response)
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async def get_rss_feed(channel: str, limit: int = 20):
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try:
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rss_content = await generate_channel_rss(channel, client=client.client, limit=limit)
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return Response(content=rss_content, media_type="application/xml")
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except ValueError as e:
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error_message = f"Invalid parameters for RSS feed generation: {str(e)}"
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logger.error(error_message)
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raise HTTPException(status_code=400, detail=error_message) from e
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except Exception as e:
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error_message = f"Failed to generate RSS feed for channel {channel}: {str(e)}"
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logger.error(error_message)
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raise HTTPException(status_code=500, detail=error_message) from e
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