Create app.py

app.py

@@ -0,0 +1,94 @@
+import os
+from fastapi import FastAPI, HTTPException
+from fastapi.middleware.cors import CORSMiddleware
+from pydantic import BaseModel
+from typing import List
+import httpx
+import logging
+
+logging.basicConfig(level=logging.INFO)
+logger = logging.getLogger(__name__)
+
+# Get OpenAI API key from Hugging Face Secrets
+OPENAI_API_KEY = os.environ.get("OPENAI_API_KEY")
+if not OPENAI_API_KEY:
+    raise RuntimeError("OPENAI_API_KEY environment variable not set")
+
+app = FastAPI(title="OpenAI Proxy for Unity")
+
+# Enable CORS for Unity WebGL builds
+app.add_middleware(
+    CORSMiddleware,
+    allow_origins=["*"],  # In production, specify your domain
+    allow_credentials=True,
+    allow_methods=["*"],
+    allow_headers=["*"],
+)
+
+class Message(BaseModel):
+    role: str
+    content: str
+
+class ChatRequest(BaseModel):
+    model: str
+    temperature: float
+    messages: List[Message]
+
+@app.get("/")
+async def root():
+    return {
+        "status": "running",
+        "message": "OpenAI Proxy Active",
+        "endpoints": {
+            "chat": "POST /chat"
+        }
+    }
+
+@app.post("/chat")
+async def proxy_chat(request: ChatRequest):
+    """
+    Proxy endpoint that forwards requests to OpenAI API
+    The API key is stored securely on the server
+    """
+    try:
+        logger.info(f"Received request: {request.model}, {len(request.messages)} messages")
+        
+        # Forward request to OpenAI
+        async with httpx.AsyncClient(timeout=60.0) as client:
+            openai_response = await client.post(
+                "https://api.openai.com/v1/chat/completions",
+                json={
+                    "model": request.model,
+                    "temperature": request.temperature,
+                    "messages": [
+                        {"role": msg.role, "content": msg.content} 
+                        for msg in request.messages
+                    ]
+                },
+                headers={
+                    "Authorization": f"Bearer {OPENAI_API_KEY}",
+                    "Content-Type": "application/json"
+                }
+            )
+            
+            if openai_response.status_code != 200:
+                logger.error(f"OpenAI API error: {openai_response.text}")
+                raise HTTPException(
+                    status_code=openai_response.status_code,
+                    detail=openai_response.text
+                )
+            
+            result = openai_response.json()
+            logger.info(f"Successfully proxied request")
+            return result
+            
+    except httpx.HTTPError as e:
+        logger.error(f"HTTP error: {str(e)}")
+        raise HTTPException(status_code=500, detail=f"Proxy error: {str(e)}")
+    except Exception as e:
+        logger.error(f"Unexpected error: {str(e)}")
+        raise HTTPException(status_code=500, detail=f"Server error: {str(e)}")
+
+@app.get("/health")
+async def health():
+    return {"status": "healthy", "api_configured": bool(OPENAI_API_KEY)}