stream-api/backend/stream.py

#!/usr/bin/env python3
import json
import sys
import os
import re
import base64
import logging
import asyncio
import tornado.web
import tornado.routing
import config
import stream_providers
import aiohttp
from typing import Optional

logging.basicConfig(format='[%(filename)s:%(lineno)d] %(message)s', stream=sys.stdout, level=logging.INFO)
logger = logging.getLogger(__name__)
class UpstreamHandler():
    def __init__(self):
        self.provider: Optional[str] = None
        self.raw: bool = False
        self.valid: bool = False
        self.proxy: config.ProxyElem = config.ProxyElem(None, None)
        self.direct: bool = False
        self.upstream: Optional[str] = None
    async def test_socks(self, proxy):
        if not hasattr(proxy, "proxy") or not isinstance(proxy.proxy, str):
            return (True, config.ProxyElem(None, None))
        try:
            splitted = proxy.proxy.rsplit(":", 1)
            host = proxy
            port = 1080
            if len(splitted) == 2:
                host = splitted[0]
                port = splitted[1]
            future = asyncio.open_connection(host=host, port=port)
            await asyncio.wait_for(future, timeout=1)
        except Exception as e:
            return (False, proxy)
        else:
            return (True, proxy)
    async def setup(self, handler):
        self.provider = handler.get_query_argument("provider", None)
        raw_str = handler.get_query_argument("raw", None)
        direct_str = handler.get_query_argument("direct", None)
        
        true_values = ['y', 'yes', 't', 'true', 'on', '1']
        if isinstance(direct_str, str):
            try:
                self.direct = (direct_str.lower() in true_values)
            except ValueError as e:
                logger.info(e)
        if isinstance(raw_str, str):
            try:
                self.raw = (raw_str.lower() in true_values)
            except ValueError as e:
                logger.info(e)
        if self.provider in config.providers.keys():
            self.valid = True
            path = handler.request.path
            if self.provider.startswith("nextcloud"):
                path = path.removesuffix("/").removesuffix("download").removesuffix("/")
            elif self.provider.startswith("youtube"):
                path = path.removeprefix("/")
            self.upstream = config.providers[self.provider] + path
            if not self.direct:
                proxy_list = config.proxies.get(self.provider)
                if isinstance(proxy_list, list):
                    futures = []
                    for current in proxy_list:
                        future = asyncio.create_task(self.test_socks(current))
                        futures.append(future)
                    for future in asyncio.as_completed(futures):
                        success, current = await future
                        if success:
                            self.proxy = current
                            break
                    for future in futures:
                        if not future.done():
                            future.cancel()


class MainHandler(tornado.web.RequestHandler):
    async def handle_any(self, redir):
        handler = UpstreamHandler()
        await handler.setup(self)
        if handler.valid:
            if handler.raw:
                await self.handle_raw(handler)
            else:
                await self.handle_render(handler)
        else:
            logger.info(f'provider missing {self.request.uri}')
            self.set_status(404)
            self.write("Stream not found. (provider missing)")
    async def get_data(self, handler):
        video_info = None
        meta = None
        title = None
        if config.template_script is not None and config.template_html is not None:
            provider_data = None
            if handler.provider.startswith("nextcloud"):
                provider_data = await stream_providers.get_nextcloud(handler.upstream, handler.proxy, logger)
            elif handler.provider.startswith("seafile"):
                provider_data = await stream_providers.get_seafile(handler.upstream, handler.proxy, logger)
            else:
                provider_data = await stream_providers.get_any(handler.upstream, handler.proxy, logger)
            
            video_info = {}
            if handler.direct:
                video_info["upstream"] = provider_data.upstream()
                video_info["poster"] = provider_data.thumbnail()
            else:
                proxied = await handler.proxy.proxy_url([(provider_data.upstream(), provider_data.proxy_ctype()), provider_data.thumbnail()])
                video_info["upstream"] = proxied[0]
                video_info["poster"] = proxied[1]
            
            video_info["ctype"] = provider_data.ctype()
            meta = provider_data.meta()
            title = provider_data.title()
        return (video_info, meta, title)
    async def handle_raw(self, handler):
        video_info, meta, title = await self.get_data(handler)
        if video_info is not None:
            self.redirect(url=video_info["upstream"], status=303)
        else:
            self.set_status(404)
            self.write("HTML template missing.")
    async def handle_render(self, handler):
        video_info, meta, title = await self.get_data(handler)
        if video_info is not None:
            script = config.template_script.generate(info=json.dumps(video_info))
            b64 = str(base64.b64encode(script), "ascii")
            data = {}
            script_file = f'data:text/javascript;charset=utf-8;base64,{b64}'
            data["script"] = script_file
            data["videojs_version"] = config.videojs_version
            data["chromecast_version"] = config.chromecast_version
            data["font_awesome_version"] = config.font_awesome_version
            rendered_html = config.template_html.generate(data=data, meta=meta, title=title)
            self.write(rendered_html)
        else:
            self.set_status(404)
            self.write("HTML template missing.")
    async def get(self):
        await self.handle_any(True)
    async def head(self):
        await self.handle_any(False)

class PlaylistHandler(tornado.web.RequestHandler):
    def get(self):
        self.set_header("Content-Type", "text/plain; charset=utf-8")
        self.write(config.playlist)

class IconHandler(tornado.web.RequestHandler):
    def get(self):
        self.set_header("Content-Type", "image/png")
        self.write(config.favicon)

class StyleHandler(tornado.web.RequestHandler):
    def get(self):
        self.set_header("Content-Type", "text/css; charset=utf-8")
        self.write(config.custom_style)
try:
    handlers = []
    handlers.append((tornado.routing.PathMatches("/sources.m3u8"), PlaylistHandler))
    handlers.append((tornado.routing.PathMatches("/favicon.ico"), IconHandler))
    handlers.append((tornado.routing.PathMatches("/style.css"), StyleHandler))
    handlers.append((tornado.routing.AnyMatches(), MainHandler))
    app_web = tornado.web.Application(handlers)
    app_web.listen(8080)
    tornado.ioloop.IOLoop.current().start()
except KeyboardInterrupt:
    print()