266 lines
10 KiB
Python
266 lines
10 KiB
Python
import asyncio
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import json
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import os
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from abc import ABC, abstractmethod
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import httpx
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import requests
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from src import config
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from src.utils import get_docker_safe_url, hashstr, logger
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class BaseEmbeddingModel(ABC):
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def __init__(self, model=None, name=None, dimension=None, url=None, base_url=None, api_key=None):
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"""
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Args:
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model: 模型名称，冗余设计，同name
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name: 模型名称，冗余设计，同model
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dimension: 维度
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url: 请求URL，冗余设计，同base_url
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base_url: 基础URL，请求URL，冗余设计，同url
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api_key: 请求API密钥
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"""
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base_url = base_url or url
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self.model = model or name
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self.dimension = dimension
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self.base_url = get_docker_safe_url(base_url)
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self.api_key = os.getenv(api_key, api_key)
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self.embed_state = {}
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@abstractmethod
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def encode(self, message: list[str] | str) -> list[list[float]]:
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"""同步编码"""
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raise NotImplementedError("Subclasses must implement this method")
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def encode_queries(self, queries: list[str] | str) -> list[list[float]]:
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"""等同于encode"""
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return self.encode(queries)
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@abstractmethod
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async def aencode(self, message: list[str] | str) -> list[list[float]]:
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"""异步编码"""
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raise NotImplementedError("Subclasses must implement this method")
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async def aencode_queries(self, queries: list[str] | str) -> list[list[float]]:
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"""等同于aencode"""
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return await self.aencode(queries)
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def batch_encode(self, messages: list[str], batch_size: int = 40) -> list[list[float]]:
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# logger.info(f"Batch encoding {len(messages)} messages")
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data = []
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task_id = None
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if len(messages) > batch_size:
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task_id = hashstr(messages)
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self.embed_state[task_id] = {"status": "in-progress", "total": len(messages), "progress": 0}
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for i in range(0, len(messages), batch_size):
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group_msg = messages[i : i + batch_size]
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logger.info(f"Encoding [{i}/{len(messages)}] messages (bsz={batch_size})")
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response = self.encode(group_msg)
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data.extend(response)
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if task_id:
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self.embed_state[task_id]["progress"] = i + len(group_msg)
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if task_id:
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self.embed_state[task_id]["status"] = "completed"
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return data
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async def abatch_encode(self, messages: list[str], batch_size: int = 40) -> list[list[float]]:
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data = []
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task_id = None
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if len(messages) > batch_size:
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task_id = hashstr(messages)
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self.embed_state[task_id] = {"status": "in-progress", "total": len(messages), "progress": 0}
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tasks = []
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for i in range(0, len(messages), batch_size):
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group_msg = messages[i : i + batch_size]
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tasks.append(self.aencode(group_msg))
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results = await asyncio.gather(*tasks)
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for res in results:
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data.extend(res)
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if task_id:
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self.embed_state[task_id]["progress"] = len(messages)
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self.embed_state[task_id]["status"] = "completed"
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return data
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class OllamaEmbedding(BaseEmbeddingModel):
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"""
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Ollama Embedding Model
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"""
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def __init__(self, **kwargs) -> None:
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super().__init__(**kwargs)
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self.base_url = self.base_url or get_docker_safe_url("http://localhost:11434/api/embed")
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def encode(self, message: list[str] | str) -> list[list[float]]:
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if isinstance(message, str):
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message = [message]
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payload = {"model": self.model, "input": message}
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try:
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response = requests.post(self.base_url, json=payload, timeout=60)
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response.raise_for_status()
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result = response.json()
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if "embeddings" not in result:
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raise ValueError(f"Ollama Embedding failed: Invalid response format {result}")
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return result["embeddings"]
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except (requests.RequestException, json.JSONDecodeError) as e:
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logger.error(f"Ollama Embedding request failed: {e}, {payload}")
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raise ValueError(f"Ollama Embedding request failed: {e}")
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async def aencode(self, message: list[str] | str) -> list[list[float]]:
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if isinstance(message, str):
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message = [message]
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payload = {"model": self.model, "input": message}
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async with httpx.AsyncClient() as client:
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try:
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response = await client.post(self.base_url, json=payload, timeout=60)
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response.raise_for_status()
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result = response.json()
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if "embeddings" not in result:
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raise ValueError(f"Ollama Embedding failed: Invalid response format {result}")
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return result["embeddings"]
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except (httpx.RequestError, json.JSONDecodeError) as e:
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logger.error(f"Ollama Embedding async request failed: {e}, {payload}")
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raise ValueError(f"Ollama Embedding async request failed: {e}")
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class OtherEmbedding(BaseEmbeddingModel):
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def __init__(self, **kwargs) -> None:
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super().__init__(**kwargs)
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self.headers = {"Authorization": f"Bearer {self.api_key}", "Content-Type": "application/json"}
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def build_payload(self, message: list[str] | str) -> dict:
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return {"model": self.model, "input": message}
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def encode(self, message: list[str] | str) -> list[list[float]]:
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payload = self.build_payload(message)
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try:
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response = requests.post(self.base_url, json=payload, headers=self.headers, timeout=60)
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response.raise_for_status()
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result = response.json()
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if not isinstance(result, dict) or "data" not in result:
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raise ValueError(f"Other Embedding failed: Invalid response format {result}")
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return [item["embedding"] for item in result["data"]]
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except (requests.RequestException, json.JSONDecodeError) as e:
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logger.error(f"Other Embedding request failed: {e}, {payload}")
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raise ValueError(f"Other Embedding request failed: {e}")
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async def aencode(self, message: list[str] | str) -> list[list[float]]:
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payload = self.build_payload(message)
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async with httpx.AsyncClient() as client:
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try:
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response = await client.post(self.base_url, json=payload, headers=self.headers, timeout=60)
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response.raise_for_status()
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result = response.json()
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if not isinstance(result, dict) or "data" not in result:
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raise ValueError(f"Other Embedding failed: Invalid response format {result}")
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return [item["embedding"] for item in result["data"]]
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except (httpx.RequestError, json.JSONDecodeError) as e:
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logger.error(f"Other Embedding async request failed: {e}, {payload}")
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raise ValueError(f"Other Embedding async request failed: {e}")
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async def test_connection(self) -> tuple[bool, str]:
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"""
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测试embedding模型的连接性
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Returns:
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tuple: (success: bool, message: str)
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"""
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try:
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# 使用简单的测试文本
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test_text = ["Hello world"]
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await self.aencode(test_text)
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return True, "连接正常"
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except Exception as e:
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error_msg = str(e)
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return False, error_msg
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async def test_embedding_model_status(model_id: str) -> dict:
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"""
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测试指定embedding模型的状态
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Args:
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model_id: 模型ID，格式为 "provider/model_name"
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Returns:
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dict: 包含状态信息的字典
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"""
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try:
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support_embed_models = config.embed_model_names.keys()
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if model_id not in support_embed_models:
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return {"model_id": model_id, "status": "unsupported", "message": f"不支持的模型: {model_id}"}
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# 选择并创建模型实例
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model = select_embedding_model(model_id)
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# 测试连接
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success, message = await model.test_connection()
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return {
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"model_id": model_id,
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"status": "available" if success else "unavailable",
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"message": message if not success else "连接正常",
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"dimension": model.dimension,
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}
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except Exception as e:
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logger.warning(f"测试embedding模型状态失败 {model_id}: {e}")
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return {"model_id": model_id, "status": "error", "message": str(e)}
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async def test_all_embedding_models_status() -> dict:
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"""
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测试所有支持的embedding模型状态
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Returns:
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dict: 包含所有模型状态的字典
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"""
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support_embed_models = list(config.embed_model_names.keys())
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results = {}
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# 并发测试所有模型
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tasks = [test_embedding_model_status(model_id) for model_id in support_embed_models]
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model_statuses = await asyncio.gather(*tasks, return_exceptions=True)
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for i, status in enumerate(model_statuses):
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if isinstance(status, Exception):
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model_id = support_embed_models[i]
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results[model_id] = {"model_id": model_id, "status": "error", "message": str(status)}
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else:
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results[status["model_id"]] = status
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return {
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"models": results,
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"total": len(support_embed_models),
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"available": len([m for m in results.values() if m["status"] == "available"]),
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}
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def select_embedding_model(model_id):
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provider, model_name = model_id.split("/", 1) if model_id else ("", "")
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support_embed_models = config.embed_model_names.keys()
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assert model_id in support_embed_models, f"Unsupported embed model: {model_id}, only support {support_embed_models}"
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logger.info(f"Loading embedding model {model_id}")
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if provider == "local":
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raise ValueError("Local embedding model is not supported, please use other embedding models")
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# 获取嵌入模型配置并转换为字典
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embed_config = config.embed_model_names[model_id].model_dump()
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if provider == "ollama":
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model = OllamaEmbedding(**embed_config)
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else:
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model = OtherEmbedding(**embed_config)
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return model
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