Create app.py

app.py

@@ -0,0 +1,98 @@
+from fastapi import FastAPI, HTTPException, Request
+from fastapi.middleware.cors import CORSMiddleware
+import httpx
+import os
+import json
+from typing import List, Optional
+import requests
+from itertools import cycle
+
+# 创建FastAPI应用，设置API前缀
+app = FastAPI(openapi_url="/api/openapi.json", docs_url="/api/docs")
+
+# CORS设置
+app.add_middleware(
+    CORSMiddleware,
+    allow_origins=["*"],
+    allow_credentials=True,
+    allow_methods=["*"],
+    allow_headers=["*"],
+)
+
+# 配置
+class Config:
+    OPENAI_API_BASE = "https://api.x.ai/v1"
+    KEYS_URL = os.getenv("KEYS_URL", "")
+    WHITELIST_IPS = os.getenv("WHITELIST_IPS", "").split(",")
+
+# 全局变量
+keys = []
+key_cycle = None
+
+# 初始化keys
+def init_keys():
+    global keys, key_cycle
+    try:
+        if Config.KEYS_URL:
+            response = requests.get(Config.KEYS_URL)
+            keys = [k.strip() for k in response.text.splitlines() if k.strip()]
+        else:
+            with open("key.txt", "r") as f:
+                keys = [k.strip() for k in f.readlines() if k.strip()]
+        
+        key_cycle = cycle(keys)
+        print(f"Loaded {len(keys)} API keys")
+    except Exception as e:
+        print(f"Error loading keys: {e}")
+        keys = []
+        key_cycle = cycle(keys)
+
+# IP白名单中间件
+@app.middleware("http")
+async def ip_whitelist(request: Request, call_next):
+    if Config.WHITELIST_IPS and Config.WHITELIST_IPS[0]:
+        client_ip = request.client.host
+        if client_ip not in Config.WHITELIST_IPS:
+            raise HTTPException(status_code=403, detail="IP not allowed")
+    return await call_next(request)
+
+# 获取下一个key
+def get_next_key():
+    if not keys:
+        raise HTTPException(status_code=500, detail="No API keys available")
+    return next(key_cycle)
+
+# 代理请求到X.AI，注意路径前缀改为/api
+@app.api_route("/api/{path:path}", methods=["GET", "POST", "PUT", "DELETE"])
+async def proxy(path: str, request: Request):
+    # 获取请求体
+    body = await request.body()
+    # 获取查询参数
+    params = dict(request.query_params)
+    # 获取headers
+    headers = dict(request.headers)
+    headers.pop("host", None)
+    
+    # 设置API key
+    headers["Authorization"] = f"Bearer {get_next_key()}"
+    
+    # 构建目标URL
+    url = f"{Config.OPENAI_API_BASE}/{path}"
+    
+    async with httpx.AsyncClient() as client:
+        try:
+            response = await client.request(
+                method=request.method,
+                url=url,
+                params=params,
+                headers=headers,
+                content=body
+            )
+            return response.json()
+        except Exception as e:
+            raise HTTPException(status_code=500, detail=str(e))
+
+# 启动时初始化
+@app.on_event("startup")
+async def startup_event():
+    init_keys()