mirror of
https://github.com/oobabooga/text-generation-webui.git
synced 2024-12-25 22:08:53 +01:00
113 lines
3.5 KiB
Python
113 lines
3.5 KiB
Python
import asyncio
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import json
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from threading import Thread
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from websockets.server import serve
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from extensions.api.util import build_parameters, try_start_cloudflared
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from modules import shared
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from modules.chat import generate_chat_reply
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from modules.text_generation import generate_reply
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PATH = '/api/v1/stream'
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async def _handle_connection(websocket, path):
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if path == '/api/v1/stream':
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async for message in websocket:
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message = json.loads(message)
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prompt = message['prompt']
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generate_params = build_parameters(message)
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stopping_strings = generate_params.pop('stopping_strings')
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generate_params['stream'] = True
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generator = generate_reply(
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prompt, generate_params, stopping_strings=stopping_strings, is_chat=False)
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# As we stream, only send the new bytes.
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skip_index = 0
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message_num = 0
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for a in generator:
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to_send = a[skip_index:]
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if to_send is None or chr(0xfffd) in to_send: # partial unicode character, don't send it yet.
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continue
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await websocket.send(json.dumps({
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'event': 'text_stream',
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'message_num': message_num,
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'text': to_send
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}))
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await asyncio.sleep(0)
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skip_index += len(to_send)
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message_num += 1
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await websocket.send(json.dumps({
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'event': 'stream_end',
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'message_num': message_num
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}))
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elif path == '/api/v1/chat-stream':
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async for message in websocket:
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body = json.loads(message)
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user_input = body['user_input']
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history = body['history']
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generate_params = build_parameters(body, chat=True)
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generate_params['stream'] = True
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regenerate = body.get('regenerate', False)
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_continue = body.get('_continue', False)
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generator = generate_chat_reply(
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user_input, history, generate_params, regenerate=regenerate, _continue=_continue, loading_message=False)
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message_num = 0
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for a in generator:
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await websocket.send(json.dumps({
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'event': 'text_stream',
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'message_num': message_num,
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'history': a
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}))
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await asyncio.sleep(0)
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message_num += 1
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await websocket.send(json.dumps({
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'event': 'stream_end',
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'message_num': message_num
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}))
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else:
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print(f'Streaming api: unknown path: {path}')
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return
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async def _run(host: str, port: int):
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async with serve(_handle_connection, host, port, ping_interval=None):
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await asyncio.Future() # run forever
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def _run_server(port: int, share: bool = False):
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address = '0.0.0.0' if shared.args.listen else '127.0.0.1'
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def on_start(public_url: str):
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public_url = public_url.replace('https://', 'wss://')
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print(f'Starting streaming server at public url {public_url}{PATH}')
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if share:
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try:
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try_start_cloudflared(port, max_attempts=3, on_start=on_start)
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except Exception as e:
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print(e)
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else:
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print(f'Starting streaming server at ws://{address}:{port}{PATH}')
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asyncio.run(_run(host=address, port=port))
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def start_server(port: int, share: bool = False):
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Thread(target=_run_server, args=[port, share], daemon=True).start()
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