File size: 8,192 Bytes
72805b8 9caeadb 72805b8 9caeadb | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 | """
FastAPI server for SQL Arena - OpenEnv compatible.
Exposes /reset, /step, /state endpoints via HTTP and WebSocket.
"""
import json
import uuid
import asyncio
from typing import Dict, Optional
from contextlib import asynccontextmanager
from fastapi import FastAPI, WebSocket, WebSocketDisconnect, HTTPException
from fastapi.middleware.cors import CORSMiddleware
from pydantic import BaseModel
from .environment import SQLArenaEnvironment, StepResult
from .models import SQLArenaAction, SQLArenaObservation, SQLArenaState
# =====================================================
# Request / Response Models
# =====================================================
class ResetRequest(BaseModel):
difficulty: str = "basic_select"
task_id: Optional[str] = None
class StepRequest(BaseModel):
sql_query: str
class ResetResponse(BaseModel):
observation: SQLArenaObservation
reward: float
done: bool
info: dict = {}
class StepResponse(BaseModel):
observation: SQLArenaObservation
reward: float
done: bool
info: dict = {}
class StateResponse(BaseModel):
state: SQLArenaState
class TaskListResponse(BaseModel):
tasks: Dict
# =====================================================
# Session Manager
# =====================================================
class SessionManager:
"""Manages multiple concurrent environment instances."""
def __init__(self, max_sessions: int = 100):
self.sessions: Dict[str, SQLArenaEnvironment] = {}
self.max_sessions = max_sessions
self._lock = asyncio.Lock()
async def create_session(self):
async with self._lock:
if len(self.sessions) >= self.max_sessions:
oldest_key = next(iter(self.sessions))
self.sessions[oldest_key].close()
del self.sessions[oldest_key]
session_id = str(uuid.uuid4())
env = SQLArenaEnvironment()
self.sessions[session_id] = env
return session_id, env
async def get_session(self, session_id: str):
return self.sessions.get(session_id)
async def remove_session(self, session_id: str):
async with self._lock:
if session_id in self.sessions:
self.sessions[session_id].close()
del self.sessions[session_id]
async def cleanup_all(self):
async with self._lock:
for env in self.sessions.values():
env.close()
self.sessions.clear()
# =====================================================
# App Setup
# =====================================================
session_manager = SessionManager()
_default_env = SQLArenaEnvironment()
@asynccontextmanager
async def lifespan(app: FastAPI):
yield
await session_manager.cleanup_all()
_default_env.close()
app = FastAPI(
title="SQL Arena - OpenEnv Environment",
description="Interactive SQL query challenge environment for AI agents",
version="1.0.0",
lifespan=lifespan,
)
app.add_middleware(
CORSMiddleware,
allow_origins=["*"],
allow_credentials=True,
allow_methods=["*"],
allow_headers=["*"],
)
# =====================================================
# HTTP Endpoints
# =====================================================
@app.get("/")
async def root():
return {
"name": "SQL Arena",
"version": "1.0.0",
"description": "Interactive SQL query challenge environment",
"endpoints": ["/reset", "/step", "/state", "/tasks", "/ws"],
}
@app.get("/health")
async def health():
return {"status": "healthy"}
@app.post("/reset", response_model=ResetResponse)
async def reset(request: ResetRequest = ResetRequest()):
try:
result = _default_env.reset(
difficulty=request.difficulty,
task_id=request.task_id,
)
return ResetResponse(
observation=result.observation,
reward=result.reward,
done=result.done,
info=result.info,
)
except Exception as e:
raise HTTPException(status_code=400, detail=str(e))
@app.post("/step", response_model=StepResponse)
async def step(request: StepRequest):
try:
action = SQLArenaAction(sql_query=request.sql_query)
result = _default_env.step(action)
return StepResponse(
observation=result.observation,
reward=result.reward,
done=result.done,
info=result.info,
)
except Exception as e:
raise HTTPException(status_code=400, detail=str(e))
@app.get("/state", response_model=StateResponse)
async def state():
try:
return StateResponse(state=_default_env.state())
except Exception as e:
raise HTTPException(status_code=400, detail=str(e))
@app.get("/tasks", response_model=TaskListResponse)
async def tasks():
return TaskListResponse(tasks=_default_env.get_available_tasks())
# =====================================================
# WebSocket Endpoint
# =====================================================
@app.websocket("/ws")
async def websocket_endpoint(websocket: WebSocket):
await websocket.accept()
session_id, env = await session_manager.create_session()
try:
while True:
data = await websocket.receive_text()
message = json.loads(data)
method = message.get("method", "")
params = message.get("params", {})
msg_id = message.get("id", None)
try:
if method == "reset":
result = env.reset(
difficulty=params.get("difficulty", "basic_select"),
task_id=params.get("task_id"),
)
response = {
"id": msg_id,
"result": {
"observation": result.observation.model_dump(),
"reward": result.reward,
"done": result.done,
"info": result.info,
},
}
elif method == "step":
action = SQLArenaAction(sql_query=params.get("sql_query", ""))
result = env.step(action)
response = {
"id": msg_id,
"result": {
"observation": result.observation.model_dump(),
"reward": result.reward,
"done": result.done,
"info": result.info,
},
}
elif method == "state":
env_state = env.state()
response = {
"id": msg_id,
"result": {"state": env_state.model_dump()},
}
elif method == "close":
response = {"id": msg_id, "result": {"status": "closed"}}
await websocket.send_text(json.dumps(response))
break
else:
response = {"id": msg_id, "error": f"Unknown method: {method}"}
await websocket.send_text(json.dumps(response))
except Exception as e:
error_response = {"id": msg_id, "error": str(e)}
await websocket.send_text(json.dumps(error_response))
except WebSocketDisconnect:
pass
finally:
await session_manager.remove_session(session_id)
# =====================================================
# Entry point
# =====================================================
def main():
"""Entry point for the server command."""
import uvicorn
uvicorn.run(app, host="0.0.0.0", port=7860)
if __name__ == "__main__":
main() |