351 lines
11 KiB
Python
351 lines
11 KiB
Python
from flask import Blueprint, session, jsonify, request, redirect
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from utils.stream_utils import *
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from utils.recommendation_utils import *
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from utils.user_utils import get_user_id
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from blueprints.middleware import login_required
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from database.database import Database
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from datetime import datetime
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from celery_tasks.streaming import update_thumbnail, combine_ts_stream
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from dateutil import parser
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from utils.path_manager import PathManager
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import json
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stream_bp = Blueprint("stream", __name__)
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# Constants
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THUMBNAIL_GENERATION_INTERVAL = 10
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# Path Manager
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path_manager = PathManager()
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# Stream Routes
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@stream_bp.route('/streams/popular/<int:no_streams>')
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def popular_streams(no_streams) -> list[dict]:
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"""
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Returns a list of streams live now with the highest viewers
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"""
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# Limit the number of streams to MAX_STREAMS
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MAX_STREAMS = 100
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if no_streams < 1:
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return jsonify([])
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elif no_streams > MAX_STREAMS:
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no_streams = MAX_STREAMS
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# Get the highest viewed streams
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streams = get_highest_view_streams(no_streams)
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return jsonify(streams)
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@stream_bp.route('/streams/popular/<string:category_name>')
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@stream_bp.route('/streams/popular/<string:category_name>/<int:no_streams>/<int:offset>')
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def popular_streams_by_category(category_name, no_streams=4, offset=0) -> list[dict]:
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"""
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Returns a list of streams live now with the highest viewers in a given category
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"""
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category_id = get_category_id(category_name)
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streams = get_streams_based_on_category(category_id, no_streams, offset)
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return jsonify(streams)
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@login_required
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@stream_bp.route('/streams/recommended')
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def recommended_streams() -> list[dict]:
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"""
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Queries DB to get a list of recommended streams using an algorithm
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"""
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user_id = session.get("user_id")
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# Get the user's most popular categories
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category = get_user_preferred_category(user_id)
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streams = get_streams_based_on_category(category)
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return streams
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@stream_bp.route('/streams/<int:streamer_id>/data')
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def stream_data(streamer_id) -> dict:
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"""
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Returns a streamer's current stream data
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"""
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data = get_current_stream_data(streamer_id)
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if session.get('user_id') == streamer_id:
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with Database() as db:
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stream_key = db.fetchone(
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"""SELECT stream_key FROM users WHERE user_id = ?""", (streamer_id,))
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if data:
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data["stream_key"] = stream_key["stream_key"]
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else:
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data = {"stream_key": stream_key["stream_key"]}
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return jsonify(data)
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# Category Routes
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@stream_bp.route('/categories/popular/<int:no_categories>')
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@stream_bp.route('/categories/popular/<int:no_categories>/<int:offset>')
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def popular_categories(no_categories=4, offset=0) -> list[dict]:
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"""
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Returns a list of most popular categories
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"""
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print(no_categories, offset, flush=True)
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# Limit the number of categories to 100
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if no_categories < 1:
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return jsonify([])
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elif no_categories > 100:
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no_categories = 100
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category_data = get_highest_view_categories(no_categories, offset)
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return jsonify(category_data)
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@login_required
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@stream_bp.route('/categories/recommended')
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def recommended_categories() -> list | list[dict]:
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"""
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Queries DB to get a list of recommended categories for the user
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"""
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user_id = session.get("user_id")
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categories = get_user_category_recommendations(user_id)
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return jsonify(categories)
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@login_required
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@stream_bp.route('/categories/following')
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def following_categories_streams():
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"""
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Returns popular streams in categories which the user followed
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"""
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streams = get_followed_categories_recommendations(session.get('user_id'))
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return jsonify(streams)
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# User Routes
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@stream_bp.route('/user/<string:username>/status')
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def user_live_status(username):
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"""
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Returns a streamer's status, if they are live or not and their most recent stream (as a vod) (their current stream if live)
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"""
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user_id = get_user_id(username)
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# Check if streamer is live and get their most recent vod
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is_live = True if get_streamer_live_status(user_id)['is_live'] else False
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most_recent_vod = get_latest_vod(user_id)
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# If there is no most recent vod, set it to None
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if not most_recent_vod:
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most_recent_vod = None
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else:
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most_recent_vod = most_recent_vod['vod_id']
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return jsonify({
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"is_live": is_live,
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"most_recent_stream": most_recent_vod,
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"user_id": user_id
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})
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# VOD Routes
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@stream_bp.route('/vods/<string:username>')
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def vods(username):
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"""
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Returns a JSON of all the vods of a streamer
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"""
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user_id = get_user_id(username)
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vods = get_user_vods(user_id)
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return jsonify(vods)
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# RTMP Server Routes
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@stream_bp.route("/init_stream", methods=["POST"])
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def init_stream():
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"""
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Called by NGINX when OBS starts streaming.
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Creates necessary directories and validates stream key.
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"""
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stream_key = request.form.get("name")
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print(f"Stream initialization requested in nginx with key: {stream_key}", flush=True)
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with Database() as db:
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# Check if valid stream key and user is allowed to stream
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user_info = db.fetchone("""SELECT user_id, username, is_live
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FROM users
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WHERE stream_key = ?""", (stream_key,))
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if not user_info:
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print("Unauthorized - Invalid stream key", flush=True)
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return "Unauthorized - Invalid stream key", 403
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# Create necessary directories
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username = user_info["username"]
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create_local_directories(username)
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return redirect(f"/stream/{username}")
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@stream_bp.route("/publish_stream", methods=["POST"])
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def publish_stream():
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"""
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Called when user clicks Start Stream in dashboard.
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Sets up stream in database and starts thumbnail generation.
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step-by-step:
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fetch user info from stream key
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insert stream into database
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set user as streaming
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periodically update thumbnail
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"""
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try:
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data = json.loads(request.form.get("data"))
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except json.JSONDecodeError as ex:
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print(f"Error: {ex}")
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except KeyError as ex:
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print(f"Error: {ex}")
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with Database() as db:
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user_info = db.fetchone("""SELECT user_id, username, is_live
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FROM users
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WHERE stream_key = ?""", (data['stream_key'],))
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if not user_info or user_info["is_live"]:
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print(
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"Unauthorized. No user found from Stream key or user is already streaming.", flush=True)
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return "Unauthorized", 403
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# Insert stream into database
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db.execute("""INSERT INTO streams (user_id, title, start_time, num_viewers, category_id)
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VALUES (?, ?, ?, ?, ?)""", (user_info["user_id"],
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data["title"],
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datetime.now(),
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0,
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get_category_id(data['category_name'])))
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# Set user as streaming
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db.execute("""UPDATE users SET is_live = 1 WHERE user_id = ?""",
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(user_info["user_id"],))
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username = user_info["username"]
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user_id = user_info["user_id"]
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# Update thumbnail periodically
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update_thumbnail.delay(user_id,
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path_manager.get_stream_file_path(username),
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path_manager.get_current_stream_thumbnail_file_path(username),
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THUMBNAIL_GENERATION_INTERVAL)
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return "OK", 200
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@stream_bp.route("/update_stream", methods=["POST"])
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def update_stream():
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"""
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Called by StreamDashboard to update stream info
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"""
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# TODO: Add thumbnails (paths) to table, allow user to update thumbnail
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stream_key = request.form.get("key")
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title = request.form.get("title")
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category_name = request.form.get("category_name")
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with Database() as db:
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user_info = db.fetchone("""SELECT user_id, username, is_live
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FROM users
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WHERE stream_key = ?""", (stream_key,))
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if not user_info or not user_info["is_live"]:
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print(
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"Unauthorized - No user found from stream key or user is not streaming", flush=True)
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return "Unauthorized", 403
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db.execute("""UPDATE streams
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SET title = ?, category_id = ?
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WHERE user_id = ?""", (title, get_category_id(category_name), user_info["user_id"]))
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return "Stream updated", 200
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@stream_bp.route("/end_stream", methods=["POST"])
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def end_stream():
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"""
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Ends a stream
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step-by-step:
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remove stream from database
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move stream to vod table
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set user as not streaming
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convert ts files to mp4
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clean up old ts files
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end thumbnail generation
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"""
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stream_key = request.form.get("key")
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if stream_key is None:
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stream_key = request.form.get("name")
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if stream_key is None:
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print("Unauthorized - No stream key provided", flush=True)
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return "Unauthorized", 403
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# Open database connection
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with Database() as db:
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# Get user info from stream key
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user_info = db.fetchone("""SELECT *
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FROM users
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WHERE stream_key = ?""", (stream_key,))
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stream_info = db.fetchone("""SELECT *
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FROM streams
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WHERE user_id = ?""", (user_info["user_id"],))
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# If stream key is invalid, return unauthorized
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if not user_info:
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print("Unauthorized - No user found from stream key", flush=True)
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return "Unauthorized", 403
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# If stream never published, return
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if not stream_info:
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print(f"Stream for stream key: {stream_key} never began", flush=True)
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return "Stream ended", 200
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# Remove stream from database
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db.execute("""DELETE FROM streams
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WHERE user_id = ?""", (user_info["user_id"],))
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# Move stream to vod table
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stream_length = int(
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(datetime.now() - parser.parse(stream_info["start_time"])).total_seconds())
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db.execute("""INSERT INTO vods (user_id, title, datetime, category_id, length, views)
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VALUES (?, ?, ?, ?, ?, ?)""", (user_info["user_id"],
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stream_info["title"],
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stream_info["start_time"],
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stream_info["category_id"],
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stream_length,
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0))
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vod_id = db.get_last_insert_id()
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# Set user as not streaming
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db.execute("""UPDATE users
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SET is_live = 0
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WHERE user_id = ?""", (user_info["user_id"],))
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# Get username
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username = user_info["username"]
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combine_ts_stream.delay(path_manager.get_stream_path(
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username), path_manager.get_vods_path(username), vod_id)
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return "Stream ended", 200
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