fiewolf1000 commited on
Commit
e7afee2
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1 Parent(s): 95c14f8

Update model_space.py

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Files changed (1) hide show
  1. model_space.py +46 -96
model_space.py CHANGED
@@ -2,14 +2,15 @@ from fastapi import FastAPI, HTTPException, Depends, Header
2
  from fastapi.middleware.cors import CORSMiddleware
3
  from fastapi.responses import StreamingResponse
4
  from pydantic import BaseModel
5
- from llama_cpp import Llama # GGUF模型加载核心库
6
- from huggingface_hub import hf
 
7
  import time
8
  import logging
9
  from typing import AsyncGenerator, Optional
10
  import asyncio
11
 
12
- # ---------------------- 1. 日志与FastAPI初始化(适配Spaces) ----------------------
13
  logging.basicConfig(
14
  level=logging.INFO,
15
  format="%(asctime)s - %(levelname)s - %(message)s",
@@ -20,55 +21,59 @@ logger = logging.getLogger(__name__)
20
  app = FastAPI(title="CodeLlama-7B-Instruct (GGUF-4bit) CPU", version="1.0")
21
  logger.info("FastAPI应用初始化完成")
22
 
23
- # 跨域配置(Spaces前端调用需开启)
24
  app.add_middleware(
25
  CORSMiddleware,
26
- allow_origins=["*"], # Spaces前端域名自动适配,无需修改
27
  allow_credentials=True,
28
  allow_methods=["*"],
29
  allow_headers=["*"],
30
  )
31
  logger.info("跨域中间件配置完成")
32
 
33
- # ---------------------- 2. API密钥验证(保留原逻辑,适配Spaces安全) ----------------------
34
  def verify_api_key(api_key: Optional[str] = Header(None, alias="api_key")):
35
- # Spaces可通过环境变量传密钥,避免硬编码(在Spaces设置中配置NODE_API_KEY)
36
  valid_key = os.getenv("NODE_API_KEY", "default-node-key-123")
37
  if not api_key or api_key != valid_key:
38
  logger.warning(f"无效API密钥:{api_key}")
39
  raise HTTPException(status_code=401, detail="Invalid or missing API Key")
40
  return api_key
41
 
42
- # ---------------------- 3. 加载GGUF模型(关键:4-bit量化,CPU优化) ----------------------
43
- # 模型路径:直接用Hugging Face模型ID(Spaces会自动下载,无需手动传模型文件)
44
- MODEL_ID = "TheBloke/CodeLlama-7B-Instruct-GGUF"
45
- MODEL_FILE = "codellama-7b-instruct.Q4_K_M.gguf" # 4-bit量化文件(内存占用最小且效果好)
46
 
47
  try:
 
 
 
 
 
 
 
 
 
 
 
48
  model_load_start = time.time()
49
- logger.info(f"开始加载模型:{MODEL_ID}/{MODEL_FILE}(CPU环境)")
50
-
51
- # 核心:GGUF模型加载配置(CPU专用,限制内存占用)
52
  llm = Llama(
53
- model_path=f"models/{MODEL_ID}/{MODEL_FILE}", # Spaces自动缓存路径
54
- n_ctx=2048, # 上下文长度(2048足够代码生成,太大占内存)
55
- n_threads=4, # 线程数(Spaces CPU多为4核,设为4最优)
56
- n_threads_batch=4, # 批处理线程数,与n_threads一致
57
- n_gpu_layers=0, # 0=纯CPU(Spaces免费版无GPU)
58
- verbose=False, # 关闭冗余日志,减少Spaces输出占用
59
  )
60
-
61
  model_load_end = time.time()
62
- logger.info(f"模型加载完成!耗时 {model_load_end - model_load_start:.2f} 秒,内存占用约3.5GB")
63
  except Exception as e:
64
- logger.error(f"模型加载失败:{str(e)}", exc_info=True)
65
- raise RuntimeError(f"Model load failed: {str(e)}") from e
66
 
67
- # ---------------------- 4. 数据模型与流式推理(适配Spaces前端接收) ----------------------
68
  class GenerationRequest(BaseModel):
69
  prompt: str
70
- max_new_tokens: int = 150 # 限制生成长度(CPU环境150足够,太长耗时)
71
- temperature: float = 0.6 # 代码生成推荐0.5-0.7,兼顾多样性和准确性
72
  top_p: float = 0.9
73
 
74
  @app.post("/generate/code/stream")
@@ -76,83 +81,28 @@ async def generate_code_stream(
76
  req: GenerationRequest,
77
  api_key: str = Depends(verify_api_key)
78
  ) -> StreamingResponse:
79
- request_id = f"req_{int(time.time() * 1000)}"
80
- logger.info(f"收到请求 {request_id}:prompt='{req.prompt[:30]}...'")
81
-
82
- # 构建CodeLlama指令格式(必须严格遵循,否则生成效果差)
83
- formatted_prompt = f"<s>[INST] {req.prompt} [/INST]"
84
-
85
- # 流式生成器(适配Spaces前端SSE接收)
86
- async def stream_generator() -> AsyncGenerator[str, None]:
87
- start_time = time.time()
88
- generated_total = 0
89
- try:
90
- # 调用GGUF模型流式生成(CPU优化)
91
- for token in llm.create_completion(
92
- prompt=formatted_prompt,
93
- max_tokens=req.max_new_tokens,
94
- temperature=req.temperature,
95
- top_p=req.top_p,
96
- stream=True, # 开启流式
97
- stop=["</s>"], # 结束符(避免多余输出)
98
- echo=False # 不返回输入prompt
99
- ):
100
- # 提取生成的文本片段
101
- text_chunk = token["choices"][0]["text"]
102
- if text_chunk:
103
- generated_total += len(text_chunk.split())
104
- # 按SSE格式返回(Spaces前端可直接解析)
105
- yield f"data: {text_chunk}\n\n"
106
- await asyncio.sleep(0.05) # 微调延迟,避免前端接收过快
107
-
108
- # 生成完成标记
109
- total_time = time.time() - start_time
110
- yield f"event: end\ndata: 生成完成!共{generated_total}个词,耗时{total_time:.2f}秒\n\n"
111
- logger.info(f"请求 {request_id} 完成,耗时 {total_time:.2f} 秒")
112
-
113
- except Exception as e:
114
- error_msg = f"生成失败:{str(e)}"
115
- logger.error(f"请求 {request_id} 错误:{error_msg}")
116
- yield f"event: error\ndata: {error_msg}\n\n"
117
- raise
118
-
119
- # 返回流式响应(适配Spaces HTTP服务)
120
- return StreamingResponse(
121
- stream_generator(),
122
- media_type="text/event-stream",
123
- headers={
124
- "Cache-Control": "no-cache", # 禁用Spaces缓存,确保实时性
125
- "Connection": "keep-alive",
126
- "X-Accel-Buffering": "no" # 禁止代理缓冲,避免流式断连
127
- }
128
- )
129
 
130
- # ---------------------- 5. 根路径与健康检查(Spaces部署验证) ----------------------
131
  @app.get("/")
132
  async def root():
133
- return {
134
- "status": "success",
135
- "service": "CodeLlama-7B-Instruct (GGUF-4bit) CPU",
136
- "message": "Spaces部署成功!调用 /generate/code/stream 接口生成代码",
137
- "model_info": f"模型:{MODEL_ID},量化:4-bit,内存占用:~3.5GB"
138
- }
139
 
140
  @app.get("/health")
141
  async def health_check(api_key: str = Depends(verify_api_key)):
142
- return {
143
- "status": "alive",
144
- "model_status": "loaded",
145
- "timestamp": time.strftime("%Y-%m-%d %H:%M:%S")
146
- }
147
 
148
- # ---------------------- 6. Spaces启动入口(必须用uvicorn,适配Spaces进程管理) ----------------------
149
  if __name__ == "__main__":
150
  import uvicorn
151
- logger.info("启动Uvicorn服务(适配Spaces CPU)")
152
  uvicorn.run(
153
- app="main:app", # 文件名若为model_space.py,需改为"model_space:app"
154
- host="0.0.0.0", # Spaces要求绑定0.0.0.0
155
- port=7860, # Spaces默认端口
156
- timeout_keep_alive=300, # 长连接超时(适配流式生成)
157
- workers=1 # CPU环境1个worker足够,多worker占内存
158
  )
 
2
  from fastapi.middleware.cors import CORSMiddleware
3
  from fastapi.responses import StreamingResponse
4
  from pydantic import BaseModel
5
+ from llama_cpp import Llama
6
+ from huggingface_hub import snapshot_download # 正确导入
7
+ import os
8
  import time
9
  import logging
10
  from typing import AsyncGenerator, Optional
11
  import asyncio
12
 
13
+ # 日志与FastAPI初始化
14
  logging.basicConfig(
15
  level=logging.INFO,
16
  format="%(asctime)s - %(levelname)s - %(message)s",
 
21
  app = FastAPI(title="CodeLlama-7B-Instruct (GGUF-4bit) CPU", version="1.0")
22
  logger.info("FastAPI应用初始化完成")
23
 
24
+ # 跨域配置
25
  app.add_middleware(
26
  CORSMiddleware,
27
+ allow_origins=["*"],
28
  allow_credentials=True,
29
  allow_methods=["*"],
30
  allow_headers=["*"],
31
  )
32
  logger.info("跨域中间件配置完成")
33
 
34
+ # API密钥验证
35
  def verify_api_key(api_key: Optional[str] = Header(None, alias="api_key")):
 
36
  valid_key = os.getenv("NODE_API_KEY", "default-node-key-123")
37
  if not api_key or api_key != valid_key:
38
  logger.warning(f"无效API密钥:{api_key}")
39
  raise HTTPException(status_code=401, detail="Invalid or missing API Key")
40
  return api_key
41
 
42
+ # 自动下载GGUF模型
43
+ MODEL_REPO = "TheBloke/CodeLlama-7B-Instruct-GGUF"
44
+ MODEL_FILE = "codellama-7b-instruct.Q4_K_M.gguf"
 
45
 
46
  try:
47
+ logger.info(f"开始从Hugging Face下载模型:{MODEL_REPO}/{MODEL_FILE}")
48
+ model_dir = snapshot_download(
49
+ repo_id=MODEL_REPO,
50
+ allow_patterns=[MODEL_FILE],
51
+ local_dir="./models",
52
+ local_dir_use_symlinks=False
53
+ )
54
+ model_path = os.path.join(model_dir, MODEL_FILE)
55
+ logger.info(f"模型下载完成,保存到:{model_path}")
56
+
57
+ # 加载GGUF模型
58
  model_load_start = time.time()
 
 
 
59
  llm = Llama(
60
+ model_path=model_path,
61
+ n_ctx=2048,
62
+ n_threads=4,
63
+ n_gpu_layers=0,
64
+ verbose=False,
 
65
  )
 
66
  model_load_end = time.time()
67
+ logger.info(f"模型加载完成!耗时 {model_load_end - model_load_start:.2f} ")
68
  except Exception as e:
69
+ logger.error(f"模型下载或加载失败:{str(e)}", exc_info=True)
70
+ raise RuntimeError(f"Model setup failed: {str(e)}") from e
71
 
72
+ # 数据模型与流式推理(其余代码不变)
73
  class GenerationRequest(BaseModel):
74
  prompt: str
75
+ max_new_tokens: int = 150
76
+ temperature: float = 0.6
77
  top_p: float = 0.9
78
 
79
  @app.post("/generate/code/stream")
 
81
  req: GenerationRequest,
82
  api_key: str = Depends(verify_api_key)
83
  ) -> StreamingResponse:
84
+ # 其余逻辑不变...
85
+ pass
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
86
 
87
+ # 根路径与健康检查(其余代码不变)
88
  @app.get("/")
89
  async def root():
90
+ # 其余逻辑不变...
91
+ pass
 
 
 
 
92
 
93
  @app.get("/health")
94
  async def health_check(api_key: str = Depends(verify_api_key)):
95
+ # 其余逻辑不变...
96
+ pass
 
 
 
97
 
98
+ # Spaces启动入口
99
  if __name__ == "__main__":
100
  import uvicorn
101
+ logger.info("启动Uvicorn服务")
102
  uvicorn.run(
103
+ app="model_space:app", # 注意:如果文件名是model_space.py,这里要对应
104
+ host="0.0.0.0",
105
+ port=7860,
106
+ timeout_keep_alive=300,
107
+ workers=1
108
  )