116 lines
3.8 KiB
Python
116 lines
3.8 KiB
Python
import asyncio
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import json
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from threading import Lock
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from typing import List
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from fastapi import APIRouter, Request, status, HTTPException
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from sse_starlette.sse import EventSourceResponse
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from pydantic import BaseModel
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from utils.rwkv import *
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import global_var
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router = APIRouter()
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class Message(BaseModel):
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role: str
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content: str
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class CompletionBody(ModelConfigBody):
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messages: List[Message]
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model: str = "rwkv"
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stream: bool = False
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completion_lock = Lock()
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@router.post("/v1/chat/completions")
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@router.post("/chat/completions")
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async def completions(body: CompletionBody, request: Request):
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model: RWKV = global_var.get(global_var.Model)
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if model is None:
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raise HTTPException(status.HTTP_400_BAD_REQUEST, "model not loaded")
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question = body.messages[-1]
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if question.role == "user":
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question = question.content
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else:
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raise HTTPException(status.HTTP_400_BAD_REQUEST, "no question found")
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completion_text = ""
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for message in body.messages:
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if message.role == "user":
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completion_text += "Bob: " + message.content + "\n\n"
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elif message.role == "assistant":
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completion_text += "Alice: " + message.content + "\n\n"
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completion_text += "Alice:"
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async def eval_rwkv():
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while completion_lock.locked():
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await asyncio.sleep(0.1)
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else:
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with completion_lock:
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set_rwkv_config(model, global_var.get(global_var.Model_Config))
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set_rwkv_config(model, body)
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if body.stream:
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for response, delta in rwkv_generate(
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model, completion_text, stop="\n\nBob"
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):
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if await request.is_disconnected():
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break
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yield json.dumps(
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{
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"response": response,
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"model": "rwkv",
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"choices": [
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{
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"delta": {"content": delta},
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"index": 0,
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"finish_reason": None,
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}
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],
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}
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)
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yield json.dumps(
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{
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"response": response,
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"model": "rwkv",
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"choices": [
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{
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"delta": {},
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"index": 0,
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"finish_reason": "stop",
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}
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],
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}
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)
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yield "[DONE]"
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else:
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response = None
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for response, delta in rwkv_generate(
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model, completion_text, stop="\n\nBob"
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):
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pass
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yield {
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"response": response,
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"model": "rwkv",
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"choices": [
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{
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"message": {
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"role": "assistant",
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"content": response,
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},
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"index": 0,
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"finish_reason": "stop",
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}
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],
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}
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# torch_gc()
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if body.stream:
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return EventSourceResponse(eval_rwkv())
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else:
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return await eval_rwkv().__anext__()
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