mirror of
https://github.com/Dispatcharr/Dispatcharr.git
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624 lines
29 KiB
Python
624 lines
29 KiB
Python
import json
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import threading
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import time
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import random
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import re
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from django.http import StreamingHttpResponse, JsonResponse, HttpResponseRedirect
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from django.views.decorators.csrf import csrf_exempt
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from django.shortcuts import get_object_or_404
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from apps.proxy.config import TSConfig as Config
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from .server import ProxyServer
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from .channel_status import ChannelStatus
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from .stream_generator import create_stream_generator
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from .utils import get_client_ip
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from .redis_keys import RedisKeys
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import logging
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from apps.channels.models import Channel, Stream
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from apps.m3u.models import M3UAccount, M3UAccountProfile
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from core.models import UserAgent, CoreSettings, PROXY_PROFILE_NAME
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from rest_framework.decorators import api_view, permission_classes
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from rest_framework.permissions import IsAuthenticated
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from .constants import ChannelState, EventType, StreamType, ChannelMetadataField
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from .config_helper import ConfigHelper
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from .services.channel_service import ChannelService
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from .url_utils import generate_stream_url, transform_url, get_stream_info_for_switch, get_stream_object, get_alternate_streams
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from .utils import get_logger
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from uuid import UUID
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import gevent
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logger = get_logger()
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@api_view(['GET'])
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def stream_ts(request, channel_id):
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"""Stream TS data to client with immediate response and keep-alive packets during initialization"""
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channel = get_stream_object(channel_id)
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client_user_agent = None
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proxy_server = ProxyServer.get_instance()
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try:
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# Generate a unique client ID
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client_id = f"client_{int(time.time() * 1000)}_{random.randint(1000, 9999)}"
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client_ip = get_client_ip(request)
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logger.info(f"[{client_id}] Requested stream for channel {channel_id}")
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# Extract client user agent early
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for header in ['HTTP_USER_AGENT', 'User-Agent', 'user-agent']:
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if (header in request.META):
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client_user_agent = request.META[header]
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logger.debug(f"[{client_id}] Client connected with user agent: {client_user_agent}")
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break
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# Check if we need to reinitialize the channel
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needs_initialization = True
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channel_state = None
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channel_initializing = False
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# Get current channel state from Redis if available
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if proxy_server.redis_client:
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metadata_key = RedisKeys.channel_metadata(channel_id)
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if proxy_server.redis_client.exists(metadata_key):
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metadata = proxy_server.redis_client.hgetall(metadata_key)
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state_field = ChannelMetadataField.STATE.encode('utf-8')
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if state_field in metadata:
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channel_state = metadata[state_field].decode('utf-8')
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# IMPROVED: Check for *any* state that indicates initialization is in progress
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active_states = [ChannelState.INITIALIZING, ChannelState.CONNECTING, ChannelState.WAITING_FOR_CLIENTS, ChannelState.ACTIVE]
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if channel_state in active_states:
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# Channel is being initialized or already active - no need for reinitialization
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needs_initialization = False
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logger.debug(f"[{client_id}] Channel {channel_id} already in state {channel_state}, skipping initialization")
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# Special handling for initializing/connecting states
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if channel_state in [ChannelState.INITIALIZING, ChannelState.CONNECTING]:
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channel_initializing = True
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logger.debug(f"[{client_id}] Channel {channel_id} is still initializing, client will wait for completion")
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else:
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# Only check for owner if channel is in a valid state
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owner_field = ChannelMetadataField.OWNER.encode('utf-8')
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if owner_field in metadata:
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owner = metadata[owner_field].decode('utf-8')
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owner_heartbeat_key = f"ts_proxy:worker:{owner}:heartbeat"
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if proxy_server.redis_client.exists(owner_heartbeat_key):
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# Owner is still active, so we don't need to reinitialize
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needs_initialization = False
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logger.debug(f"[{client_id}] Channel {channel_id} has active owner {owner}")
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# Start initialization if needed
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if needs_initialization or not proxy_server.check_if_channel_exists(channel_id):
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logger.info(f"[{client_id}] Starting channel {channel_id} initialization")
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# Force cleanup of any previous instance if in terminal state
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if channel_state in [ChannelState.ERROR, ChannelState.STOPPING, ChannelState.STOPPED]:
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logger.warning(f"[{client_id}] Channel {channel_id} in state {channel_state}, forcing cleanup")
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proxy_server.stop_channel(channel_id)
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# Use max retry attempts and connection timeout from config
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max_retries = ConfigHelper.max_retries()
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retry_timeout = ConfigHelper.connection_timeout()
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wait_start_time = time.time()
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stream_url = None
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stream_user_agent = None
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transcode = False
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profile_value = None
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error_reason = None
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# Try to get a stream with configured retries
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for attempt in range(max_retries):
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stream_url, stream_user_agent, transcode, profile_value = generate_stream_url(channel_id)
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if stream_url is not None:
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logger.info(f"[{client_id}] Successfully obtained stream for channel {channel_id}")
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break
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# If we failed because there are no streams assigned, don't retry
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_, _, error_reason = channel.get_stream()
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if error_reason and 'maximum connection limits' not in error_reason:
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logger.warning(f"[{client_id}] Can't retry - error not related to connection limits: {error_reason}")
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break
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# Don't exceed the overall connection timeout
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if time.time() - wait_start_time > retry_timeout:
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logger.warning(f"[{client_id}] Connection wait timeout exceeded ({retry_timeout}s)")
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break
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# Wait before retrying (using exponential backoff with a cap)
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wait_time = min(0.5 * (2 ** attempt), 2.0) # Caps at 2 seconds
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logger.info(f"[{client_id}] Waiting {wait_time:.1f}s for a connection to become available (attempt {attempt+1}/{max_retries})")
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gevent.sleep(wait_time) # FIXED: Using gevent.sleep instead of time.sleep
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if stream_url is None:
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# Make sure to release any stream locks that might have been acquired
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if hasattr(channel, 'streams') and channel.streams.exists():
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for stream in channel.streams.all():
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try:
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stream.release_stream()
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logger.info(f"[{client_id}] Released stream {stream.id} for channel {channel_id}")
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except Exception as e:
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logger.error(f"[{client_id}] Error releasing stream: {e}")
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# Get the specific error message if available
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wait_duration = f"{int(time.time() - wait_start_time)}s"
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error_msg = error_reason if error_reason else 'No available streams for this channel'
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return JsonResponse({
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'error': error_msg,
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'waited': wait_duration
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}, status=503) # 503 Service Unavailable is appropriate here
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# Get the stream ID from the channel
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stream_id, m3u_profile_id, _ = channel.get_stream()
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logger.info(f"Channel {channel_id} using stream ID {stream_id}, m3u account profile ID {m3u_profile_id}")
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# Generate transcode command if needed
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stream_profile = channel.get_stream_profile()
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if stream_profile.is_redirect():
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# Validate the stream URL before redirecting
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from .url_utils import validate_stream_url, get_alternate_streams, get_stream_info_for_switch
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# Try initial URL
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logger.info(f"[{client_id}] Validating redirect URL: {stream_url}")
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is_valid, final_url, status_code, message = validate_stream_url(
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stream_url,
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user_agent=stream_user_agent,
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timeout=(5, 5)
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)
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# If first URL doesn't validate, try alternates
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if not is_valid:
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logger.warning(f"[{client_id}] Primary stream URL failed validation: {message}")
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# Track tried streams to avoid loops
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tried_streams = {stream_id}
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# Get alternate streams
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alternates = get_alternate_streams(channel_id, stream_id)
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# Try each alternate until one works
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for alt in alternates:
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if alt['stream_id'] in tried_streams:
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continue
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tried_streams.add(alt['stream_id'])
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# Get stream info
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alt_info = get_stream_info_for_switch(channel_id, alt['stream_id'])
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if 'error' in alt_info:
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logger.warning(f"[{client_id}] Error getting alternate stream info: {alt_info['error']}")
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continue
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# Validate the alternate URL
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logger.info(f"[{client_id}] Trying alternate stream #{alt['stream_id']}: {alt_info['url']}")
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is_valid, final_url, status_code, message = validate_stream_url(
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alt_info['url'],
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user_agent=alt_info['user_agent'],
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timeout=(5, 5)
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)
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if is_valid:
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logger.info(f"[{client_id}] Alternate stream #{alt['stream_id']} validated successfully")
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break
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else:
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logger.warning(f"[{client_id}] Alternate stream #{alt['stream_id']} failed validation: {message}")
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# Release stream lock before redirecting
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channel.release_stream()
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# Final decision based on validation results
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if is_valid:
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logger.info(f"[{client_id}] Redirecting to validated URL: {final_url} ({message})")
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return HttpResponseRedirect(final_url)
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else:
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logger.error(f"[{client_id}] All available redirect URLs failed validation")
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return JsonResponse({
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'error': 'All available streams failed validation'
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}, status=502) # 502 Bad Gateway
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# Initialize channel with the stream's user agent (not the client's)
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success = ChannelService.initialize_channel(
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channel_id, stream_url, stream_user_agent, transcode, profile_value, stream_id, m3u_profile_id
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)
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if not success:
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return JsonResponse({'error': 'Failed to initialize channel'}, status=500)
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# If we're the owner, wait for connection to establish
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if proxy_server.am_i_owner(channel_id):
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manager = proxy_server.stream_managers.get(channel_id)
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if manager:
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wait_start = time.time()
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timeout = ConfigHelper.connection_timeout()
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while not manager.connected:
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if time.time() - wait_start > timeout:
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proxy_server.stop_channel(channel_id)
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return JsonResponse({'error': 'Connection timeout'}, status=504)
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# Check if this manager should keep retrying or stop
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if not manager.should_retry():
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# Check channel state in Redis to make a better decision
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metadata_key = RedisKeys.channel_metadata(channel_id)
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current_state = None
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if proxy_server.redis_client:
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try:
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state_bytes = proxy_server.redis_client.hget(metadata_key, ChannelMetadataField.STATE)
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if state_bytes:
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current_state = state_bytes.decode('utf-8')
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logger.debug(f"[{client_id}] Current state of channel {channel_id}: {current_state}")
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except Exception as e:
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logger.warning(f"[{client_id}] Error getting channel state: {e}")
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# Allow normal transitional states to continue
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if current_state in [ChannelState.INITIALIZING, ChannelState.CONNECTING]:
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logger.info(f"[{client_id}] Channel {channel_id} is in {current_state} state, continuing to wait")
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# Reset wait timer to allow the transition to complete
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wait_start = time.time()
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continue
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# Check if we're switching URLs
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if hasattr(manager, 'url_switching') and manager.url_switching:
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logger.info(f"[{client_id}] Stream manager is currently switching URLs for channel {channel_id}")
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# Reset wait timer to give the switch a chance
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wait_start = time.time()
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continue
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# If we reach here, we've exhausted retries and the channel isn't in a valid transitional state
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logger.warning(f"[{client_id}] Channel {channel_id} failed to connect and is not in transitional state")
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proxy_server.stop_channel(channel_id)
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return JsonResponse({'error': 'Failed to connect'}, status=502)
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gevent.sleep(0.1) # FIXED: Using gevent.sleep instead of time.sleep
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logger.info(f"[{client_id}] Successfully initialized channel {channel_id}")
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channel_initializing = True
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# Register client - can do this regardless of initialization state
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# Create local resources if needed
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if channel_id not in proxy_server.stream_buffers or channel_id not in proxy_server.client_managers:
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logger.debug(f"[{client_id}] Channel {channel_id} exists in Redis but not initialized in this worker - initializing now")
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# Get URL from Redis metadata
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url = None
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stream_user_agent = None # Initialize the variable
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if proxy_server.redis_client:
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metadata_key = RedisKeys.channel_metadata(channel_id)
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url_bytes = proxy_server.redis_client.hget(metadata_key, ChannelMetadataField.URL)
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ua_bytes = proxy_server.redis_client.hget(metadata_key, ChannelMetadataField.USER_AGENT)
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profile_bytes = proxy_server.redis_client.hget(metadata_key, ChannelMetadataField.STREAM_PROFILE)
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if url_bytes:
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url = url_bytes.decode('utf-8')
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if ua_bytes:
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stream_user_agent = ua_bytes.decode('utf-8')
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# Extract transcode setting from Redis
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if profile_bytes:
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profile_str = profile_bytes.decode('utf-8')
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use_transcode = (profile_str == PROXY_PROFILE_NAME or profile_str == 'None')
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logger.debug(f"Using profile '{profile_str}' for channel {channel_id}, transcode={use_transcode}")
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else:
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# Default settings when profile not found in Redis
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profile_str = 'None' # Default profile name
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use_transcode = False # Default to direct streaming without transcoding
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logger.debug(f"No profile found in Redis for channel {channel_id}, defaulting to transcode={use_transcode}")
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# Use client_user_agent as fallback if stream_user_agent is None
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success = proxy_server.initialize_channel(url, channel_id, stream_user_agent or client_user_agent, use_transcode)
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if not success:
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logger.error(f"[{client_id}] Failed to initialize channel {channel_id} locally")
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return JsonResponse({'error': 'Failed to initialize channel locally'}, status=500)
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logger.info(f"[{client_id}] Successfully initialized channel {channel_id} locally")
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# Register client
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buffer = proxy_server.stream_buffers[channel_id]
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client_manager = proxy_server.client_managers[channel_id]
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client_manager.add_client(client_id, client_ip, client_user_agent)
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logger.info(f"[{client_id}] Client registered with channel {channel_id}")
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# Create a stream generator for this client
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generate = create_stream_generator(
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channel_id, client_id, client_ip, client_user_agent, channel_initializing
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)
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# Return the StreamingHttpResponse from the main function
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response = StreamingHttpResponse(
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streaming_content=generate(),
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content_type='video/mp2t'
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)
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response['Cache-Control'] = 'no-cache'
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return response
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except Exception as e:
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logger.error(f"Error in stream_ts: {e}", exc_info=True)
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return JsonResponse({'error': str(e)}, status=500)
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@csrf_exempt
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@api_view(['POST'])
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@permission_classes([IsAuthenticated])
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def change_stream(request, channel_id):
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"""Change stream URL for existing channel with enhanced diagnostics"""
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proxy_server = ProxyServer.get_instance()
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try:
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data = json.loads(request.body)
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new_url = data.get('url')
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user_agent = data.get('user_agent')
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stream_id = data.get('stream_id')
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# If stream_id is provided, get the URL and user_agent from it
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if stream_id:
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logger.info(f"Stream ID {stream_id} provided, looking up stream info for channel {channel_id}")
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stream_info = get_stream_info_for_switch(channel_id, stream_id)
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if 'error' in stream_info:
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return JsonResponse({
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'error': stream_info['error'],
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'stream_id': stream_id
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}, status=404)
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# Use the info from the stream
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new_url = stream_info['url']
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user_agent = stream_info['user_agent']
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m3u_profile_id = stream_info.get('m3u_profile_id')
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# Stream ID will be passed to change_stream_url later
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elif not new_url:
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return JsonResponse({'error': 'Either url or stream_id must be provided'}, status=400)
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logger.info(f"Attempting to change stream for channel {channel_id} to {new_url}")
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# Use the service layer instead of direct implementation
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# Pass stream_id to ensure proper connection tracking
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result = ChannelService.change_stream_url(channel_id, new_url, user_agent, stream_id, m3u_profile_id)
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# Get the stream manager before updating URL
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stream_manager = proxy_server.stream_managers.get(channel_id)
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# If we have a stream manager, reset its tried_stream_ids when manually changing streams
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if stream_manager:
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# Reset tried streams when manually switching URL via API
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stream_manager.tried_stream_ids = set()
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logger.debug(f"Reset tried stream IDs for channel {channel_id} during manual stream change")
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if result.get('status') == 'error':
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return JsonResponse({
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'error': result.get('message', 'Unknown error'),
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'diagnostics': result.get('diagnostics', {})
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}, status=404)
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# Format response based on whether it was a direct update or event-based
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response_data = {
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'message': 'Stream changed successfully',
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'channel': channel_id,
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'url': new_url,
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'owner': result.get('direct_update', False),
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'worker_id': proxy_server.worker_id
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}
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# Include stream_id in response if it was used
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if stream_id:
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response_data['stream_id'] = stream_id
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return JsonResponse(response_data)
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except json.JSONDecodeError:
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return JsonResponse({'error': 'Invalid JSON'}, status=400)
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except Exception as e:
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logger.error(f"Failed to change stream: {e}", exc_info=True)
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return JsonResponse({'error': str(e)}, status=500)
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@api_view(['GET'])
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@permission_classes([IsAuthenticated])
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def channel_status(request, channel_id=None):
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"""
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Returns status information about channels with detail level based on request:
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- /status/ returns basic summary of all channels
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- /status/{channel_id} returns detailed info about specific channel
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"""
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proxy_server = ProxyServer.get_instance()
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try:
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# Check if Redis is available
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if not proxy_server.redis_client:
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return JsonResponse({'error': 'Redis connection not available'}, status=500)
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# Handle single channel or all channels
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if channel_id:
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# Detailed info for specific channel
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channel_info = ChannelStatus.get_detailed_channel_info(channel_id)
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if channel_info:
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return JsonResponse(channel_info)
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else:
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return JsonResponse({'error': f'Channel {channel_id} not found'}, status=404)
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else:
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# Basic info for all channels
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channel_pattern = "ts_proxy:channel:*:metadata"
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all_channels = []
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# Extract channel IDs from keys
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cursor = 0
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while True:
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cursor, keys = proxy_server.redis_client.scan(cursor, match=channel_pattern)
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for key in keys:
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channel_id_match = re.search(r"ts_proxy:channel:(.*):metadata", key.decode('utf-8'))
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if channel_id_match:
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ch_id = channel_id_match.group(1)
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channel_info = ChannelStatus.get_basic_channel_info(ch_id)
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if channel_info:
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all_channels.append(channel_info)
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if cursor == 0:
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break
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return JsonResponse({'channels': all_channels, 'count': len(all_channels)})
|
|
|
|
except Exception as e:
|
|
logger.error(f"Error in channel_status: {e}", exc_info=True)
|
|
return JsonResponse({'error': str(e)}, status=500)
|
|
|
|
@csrf_exempt
|
|
@api_view(['POST', 'DELETE'])
|
|
@permission_classes([IsAuthenticated])
|
|
def stop_channel(request, channel_id):
|
|
"""Stop a channel and release all associated resources using PubSub events"""
|
|
try:
|
|
logger.info(f"Request to stop channel {channel_id} received")
|
|
|
|
# Use the service layer instead of direct implementation
|
|
result = ChannelService.stop_channel(channel_id)
|
|
|
|
if result.get('status') == 'error':
|
|
return JsonResponse({'error': result.get('message', 'Unknown error')}, status=404)
|
|
|
|
return JsonResponse({
|
|
'message': 'Channel stop request sent',
|
|
'channel_id': channel_id,
|
|
'previous_state': result.get('previous_state')
|
|
})
|
|
|
|
except Exception as e:
|
|
logger.error(f"Failed to stop channel: {e}", exc_info=True)
|
|
return JsonResponse({'error': str(e)}, status=500)
|
|
|
|
@csrf_exempt
|
|
@api_view(['POST'])
|
|
@permission_classes([IsAuthenticated])
|
|
def stop_client(request, channel_id):
|
|
"""Stop a specific client connection using existing client management"""
|
|
try:
|
|
# Parse request body to get client ID
|
|
data = json.loads(request.body)
|
|
client_id = data.get('client_id')
|
|
|
|
if not client_id:
|
|
return JsonResponse({'error': 'No client_id provided'}, status=400)
|
|
|
|
# Use the service layer instead of direct implementation
|
|
result = ChannelService.stop_client(channel_id, client_id)
|
|
|
|
if result.get('status') == 'error':
|
|
return JsonResponse({'error': result.get('message')}, status=404)
|
|
|
|
return JsonResponse({
|
|
'message': 'Client stop request processed',
|
|
'channel_id': channel_id,
|
|
'client_id': client_id,
|
|
'locally_processed': result.get('locally_processed', False)
|
|
})
|
|
|
|
except json.JSONDecodeError:
|
|
return JsonResponse({'error': 'Invalid JSON'}, status=400)
|
|
except Exception as e:
|
|
logger.error(f"Failed to stop client: {e}", exc_info=True)
|
|
return JsonResponse({'error': str(e)}, status=500)
|
|
|
|
@csrf_exempt
|
|
@api_view(['POST'])
|
|
@permission_classes([IsAuthenticated])
|
|
def next_stream(request, channel_id):
|
|
"""Switch to the next available stream for a channel"""
|
|
proxy_server = ProxyServer.get_instance()
|
|
|
|
try:
|
|
logger.info(f"Request to switch to next stream for channel {channel_id} received")
|
|
|
|
# Check if the channel exists
|
|
channel = get_stream_object(channel_id)
|
|
|
|
# First check if channel is active in Redis
|
|
current_stream_id = None
|
|
profile_id = None
|
|
|
|
if proxy_server.redis_client:
|
|
metadata_key = RedisKeys.channel_metadata(channel_id)
|
|
if proxy_server.redis_client.exists(metadata_key):
|
|
# Get current stream ID from Redis
|
|
stream_id_bytes = proxy_server.redis_client.hget(metadata_key, ChannelMetadataField.STREAM_ID)
|
|
if stream_id_bytes:
|
|
current_stream_id = int(stream_id_bytes.decode('utf-8'))
|
|
logger.info(f"Found current stream ID {current_stream_id} in Redis for channel {channel_id}")
|
|
|
|
# Get M3U profile from Redis if available
|
|
profile_id_bytes = proxy_server.redis_client.hget(metadata_key, ChannelMetadataField.M3U_PROFILE)
|
|
if profile_id_bytes:
|
|
profile_id = int(profile_id_bytes.decode('utf-8'))
|
|
logger.info(f"Found M3U profile ID {profile_id} in Redis for channel {channel_id}")
|
|
|
|
if not current_stream_id:
|
|
# Channel is not running
|
|
return JsonResponse({'error': 'No current stream found for channel'}, status=404)
|
|
|
|
# Get all streams for this channel in their defined order
|
|
streams = list(channel.streams.all().order_by('channelstream__order'))
|
|
|
|
if len(streams) <= 1:
|
|
return JsonResponse({
|
|
'error': 'No alternate streams available for this channel',
|
|
'current_stream_id': current_stream_id
|
|
}, status=404)
|
|
|
|
# Find the current stream's position in the list
|
|
current_index = None
|
|
for i, stream in enumerate(streams):
|
|
if stream.id == current_stream_id:
|
|
current_index = i
|
|
break
|
|
|
|
if current_index is None:
|
|
logger.warning(f"Current stream ID {current_stream_id} not found in channel's streams list")
|
|
# Fall back to the first stream that's not the current one
|
|
next_stream = next((s for s in streams if s.id != current_stream_id), None)
|
|
if not next_stream:
|
|
return JsonResponse({
|
|
'error': 'Could not find current stream in channel list',
|
|
'current_stream_id': current_stream_id
|
|
}, status=404)
|
|
else:
|
|
# Get the next stream in the rotation (with wrap-around)
|
|
next_index = (current_index + 1) % len(streams)
|
|
next_stream = streams[next_index]
|
|
|
|
next_stream_id = next_stream.id
|
|
logger.info(f"Rotating to next stream ID {next_stream_id} for channel {channel_id}")
|
|
|
|
# Get full stream info including URL for the next stream
|
|
stream_info = get_stream_info_for_switch(channel_id, next_stream_id)
|
|
|
|
if 'error' in stream_info:
|
|
return JsonResponse({
|
|
'error': stream_info['error'],
|
|
'current_stream_id': current_stream_id,
|
|
'next_stream_id': next_stream_id
|
|
}, status=404)
|
|
|
|
# Now use the ChannelService to change the stream URL
|
|
result = ChannelService.change_stream_url(
|
|
channel_id,
|
|
stream_info['url'],
|
|
stream_info['user_agent'],
|
|
next_stream_id # Pass the stream_id to be stored in Redis
|
|
)
|
|
|
|
if result.get('status') == 'error':
|
|
return JsonResponse({
|
|
'error': result.get('message', 'Unknown error'),
|
|
'diagnostics': result.get('diagnostics', {}),
|
|
'current_stream_id': current_stream_id,
|
|
'next_stream_id': next_stream_id
|
|
}, status=404)
|
|
|
|
# Format success response
|
|
response_data = {
|
|
'message': 'Stream switched to next available',
|
|
'channel': channel_id,
|
|
'previous_stream_id': current_stream_id,
|
|
'new_stream_id': next_stream_id,
|
|
'new_url': stream_info['url'],
|
|
'owner': result.get('direct_update', False),
|
|
'worker_id': proxy_server.worker_id
|
|
}
|
|
|
|
return JsonResponse(response_data)
|
|
|
|
except Exception as e:
|
|
logger.error(f"Failed to switch to next stream: {e}", exc_info=True)
|
|
return JsonResponse({'error': str(e)}, status=500)
|