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FastAPI server for SQL Data Analyst OpenEnv.
Provides REST and WebSocket endpoints for HuggingFace Spaces deployment.
"""
from fastapi import FastAPI, WebSocket, WebSocketDisconnect
from pydantic import BaseModel, Field
from typing import Optional, Dict, Any
import json
import asyncio
from env import SQLAnalystEnv, Action
app = FastAPI(title="SQL Data Analyst Environment")
envs: Dict[str, SQLAnalystEnv] = {}
class ResetRequest(BaseModel):
task_id: str = Field(default="monthly_signups")
class StepRequest(BaseModel):
session_id: str
sql_query: Optional[str] = None
submit_answer: Optional[str] = None
class StateRequest(BaseModel):
session_id: str
@app.get("/")
async def root():
return {
"name": "sql-data-analyst",
"version": "1.0.0",
"description": "SQL Data Analyst OpenEnv - RL environment for SQL query generation",
}
@app.post("/reset")
async def reset(task_id: str = "monthly_signups") -> Dict[str, Any]:
session_id = task_id
env = SQLAnalystEnv(task_id=task_id)
result = env.reset()
envs[session_id] = env
return {
"session_id": session_id,
"observation": {
"schema_summary": result.observation.schema_summary,
"question": result.observation.question,
"step": result.observation.step,
"max_steps": result.observation.max_steps,
"hints": result.observation.hints,
"done": result.observation.done,
},
"reward": result.reward,
"done": result.done,
}
@app.post("/step")
async def step(
session_id: str,
sql_query: Optional[str] = None,
submit_answer: Optional[str] = None,
) -> Dict[str, Any]:
if session_id not in envs:
return {"error": "Session not found. Call /reset first."}
env = envs[session_id]
action = Action(sql_query=sql_query, submit_answer=submit_answer)
result = env.step(action)
return {
"observation": {
"schema_summary": result.observation.schema_summary,
"question": result.observation.question,
"last_query": result.observation.last_query,
"last_result": {
"columns": result.observation.last_result.columns
if result.observation.last_result
else None,
"rows": result.observation.last_result.rows
if result.observation.last_result
else None,
"error": result.observation.last_result.error
if result.observation.last_result
else None,
}
if result.observation.last_result
else None,
"last_error": result.observation.last_error,
"step": result.observation.step,
"max_steps": result.observation.max_steps,
"hints": result.observation.hints,
"done": result.observation.done,
},
"reward": result.reward,
"done": result.done,
"info": result.info,
}
@app.post("/state")
async def state(session_id: str) -> Dict[str, Any]:
if session_id not in envs:
return {"error": "Session not found. Call /reset first."}
env = envs[session_id]
state = env.state()
return {
"task_id": state.task_id,
"difficulty": state.difficulty,
"step": state.step,
"max_steps": state.max_steps,
"query_history": state.query_history,
"total_reward": state.total_reward,
"done": state.done,
}
@app.post("/delete")
async def delete_session(session_id: str) -> Dict[str, str]:
if session_id in envs:
del envs[session_id]
return {"status": "deleted", "session_id": session_id}
return {"status": "not_found", "session_id": session_id}
@app.websocket("/ws")
async def websocket_endpoint(websocket: WebSocket):
await websocket.accept()
session_id = None
env = None
try:
while True:
data = await websocket.receive_text()
message = json.loads(data)
action_type = message.get("type")
if action_type == "reset":
task_id = message.get("task_id", "monthly_signups")
env = SQLAnalystEnv(task_id=task_id)
result = env.reset()
session_id = task_id
envs[session_id] = env
await websocket.send_json(
{
"type": "reset",
"observation": {
"schema_summary": result.observation.schema_summary,
"question": result.observation.question,
"step": result.observation.step,
"max_steps": result.observation.max_steps,
"hints": result.observation.hints,
},
"reward": result.reward,
"done": result.done,
}
)
elif action_type == "step":
if not env:
await websocket.send_json({"error": "Call reset first"})
continue
action = Action(
sql_query=message.get("sql_query"),
submit_answer=message.get("submit_answer"),
)
result = env.step(action)
await websocket.send_json(
{
"type": "step",
"observation": {
"schema_summary": result.observation.schema_summary,
"question": result.observation.question,
"last_query": result.observation.last_query,
"last_result": {
"columns": result.observation.last_result.columns
if result.observation.last_result
else None,
"rows": result.observation.last_result.rows
if result.observation.last_result
else None,
"error": result.observation.last_result.error
if result.observation.last_result
else None,
}
if result.observation.last_result
else None,
"step": result.observation.step,
"hints": result.observation.hints,
"done": result.observation.done,
},
"reward": result.reward,
"done": result.done,
"info": result.info,
}
)
elif action_type == "state":
if not env:
await websocket.send_json({"error": "Call reset first"})
continue
state = env.state()
await websocket.send_json(
{
"type": "state",
"task_id": state.task_id,
"difficulty": state.difficulty,
"step": state.step,
"max_steps": state.max_steps,
"query_history": state.query_history,
"total_reward": state.total_reward,
"done": state.done,
}
)
elif action_type == "close":
if session_id and session_id in envs:
del envs[session_id]
break
except WebSocketDisconnect:
pass
except Exception as e:
await websocket.send_json({"error": str(e)})
if __name__ == "__main__":
import uvicorn
uvicorn.run(app, host="0.0.0.0", port=7860)
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