110 lines
3.8 KiB
Python
110 lines
3.8 KiB
Python
"""ModelAdapter — 범용 OpenAI-compat 모델 어댑터."""
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from __future__ import annotations
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import json
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import logging
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from collections.abc import AsyncGenerator
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import httpx
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logger = logging.getLogger(__name__)
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class ModelAdapter:
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"""OpenAI-compatible /v1/chat/completions 백엔드 범용 어댑터.
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Ollama, MLX 등 모두 동일 인터페이스로 호출."""
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def __init__(
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self,
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name: str,
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base_url: str,
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model: str,
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system_prompt: str,
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temperature: float = 0.7,
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timeout: float = 120.0,
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):
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self.name = name
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self.base_url = base_url
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self.model = model
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self.system_prompt = system_prompt
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self.temperature = temperature
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self.timeout = timeout
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async def stream_chat(self, message: str) -> AsyncGenerator[str, None]:
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"""스트리밍 호출. content chunk를 yield."""
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payload = {
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"model": self.model,
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"messages": [
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{"role": "system", "content": self.system_prompt},
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{"role": "user", "content": message},
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],
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"stream": True,
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"temperature": self.temperature,
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}
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async with httpx.AsyncClient(timeout=self.timeout) as client:
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try:
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async with client.stream(
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"POST",
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f"{self.base_url}/v1/chat/completions",
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json=payload,
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) as resp:
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if resp.status_code != 200:
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body = await resp.aread()
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logger.error("%s error %d: %s", self.name, resp.status_code, body.decode())
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raise RuntimeError(f"{self.name} 응답 실패 ({resp.status_code})")
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async for line in resp.aiter_lines():
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line = line.strip()
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if not line or not line.startswith("data: "):
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continue
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payload_str = line[len("data: "):]
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if payload_str == "[DONE]":
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return
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try:
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chunk = json.loads(payload_str)
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delta = chunk.get("choices", [{}])[0].get("delta", {})
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content = delta.get("content", "")
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if content:
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yield content
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except (json.JSONDecodeError, IndexError, KeyError):
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continue
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except httpx.ConnectError:
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logger.error("%s connection failed: %s", self.name, self.base_url)
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raise
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except httpx.ReadTimeout:
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logger.error("%s read timeout", self.name)
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raise
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async def complete_chat(self, message: str) -> str:
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"""비스트리밍 호출. 전체 응답 텍스트 반환."""
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payload = {
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"model": self.model,
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"messages": [
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{"role": "system", "content": self.system_prompt},
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{"role": "user", "content": message},
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],
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"stream": False,
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"temperature": self.temperature,
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}
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async with httpx.AsyncClient(timeout=self.timeout) as client:
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resp = await client.post(
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f"{self.base_url}/v1/chat/completions",
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json=payload,
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)
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resp.raise_for_status()
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data = resp.json()
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return data["choices"][0]["message"]["content"]
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async def health_check(self) -> bool:
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"""GET /v1/models — 5초 timeout."""
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try:
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async with httpx.AsyncClient(timeout=5.0) as client:
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resp = await client.get(f"{self.base_url}/v1/models")
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return resp.status_code < 500
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except Exception:
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return False
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