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1a1713a 95707b2 1a1713a 95707b2 1a1713a 95707b2 1a1713a 95707b2 1a1713a 95707b2 | 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 | """
FastAPI HTTP wrapper for SQLCorrectionEnv.
Exposes the OpenEnv-required endpoints: /reset, /step, /state + /tasks for validator.
"""
from contextlib import asynccontextmanager
from typing import Optional
from fastapi import FastAPI, HTTPException
from fastapi.middleware.cors import CORSMiddleware
from pydantic import BaseModel
from sql_env import SQLAction, SQLCorrectionEnv
from sql_env.tasks import ALL_TASKS
class ResetRequest(BaseModel):
difficulty: Optional[str] = "easy"
task_name: Optional[str] = None
task_index: Optional[int] = None
class StepRequest(BaseModel):
corrected_query: str
env: Optional[SQLCorrectionEnv] = None
@asynccontextmanager
async def lifespan(_: FastAPI):
global env
env = SQLCorrectionEnv(difficulty="easy")
yield
if env is not None:
await env.close()
app = FastAPI(
title="SQL Correction RL Environment",
description="OpenEnv-compliant environment for SQL query correction tasks.",
version="1.0.0",
lifespan=lifespan,
)
app.add_middleware(
CORSMiddleware,
allow_origins=["*"],
allow_methods=["*"],
allow_headers=["*"],
)
@app.post("/reset")
async def reset(request: ResetRequest = ResetRequest()):
"""Reset the environment and return the initial observation."""
global env
difficulty = request.task_name or request.difficulty or "easy"
if difficulty not in {"easy", "medium", "hard"}:
raise HTTPException(status_code=400, detail="difficulty must be easy, medium, or hard")
env = SQLCorrectionEnv(
difficulty=difficulty,
task_index=request.task_index,
)
obs = await env.reset()
return obs.model_dump()
@app.post("/step")
async def step(request: StepRequest):
"""Take one step and return the new observation, reward, done flag, and info."""
global env
if env is None:
raise HTTPException(status_code=400, detail="Call /reset first.")
try:
action = SQLAction(corrected_query=request.corrected_query)
result = await env.step(action)
return result.model_dump()
except RuntimeError as exc:
raise HTTPException(status_code=400, detail=str(exc)) from exc
@app.post("/state")
async def state():
"""Return current environment state."""
global env
if env is None:
return {"status": "not_initialized"}
return await env.state()
@app.get("/health")
async def health():
return {"status": "ok", "service": "sql-correction-env"}
@app.get("/tasks")
async def list_tasks():
"""Return graded tasks by difficulty (RL validator format)."""
graded_tasks = {
diff: [task.__dict__ for task in tasks if task.grader is not None]
for diff, tasks in ALL_TASKS.items()
}
return graded_tasks # {"easy": [tasks], "medium": [tasks], "hard": [tasks]}
@app.get("/")
async def root():
return {
"name": "SQL Correction RL Environment",
"version": "1.0.0",
"endpoints": ["/reset", "/step", "/state", "/health", "/tasks"],
"tasks": ["easy", "medium", "hard"],
}
def main():
import uvicorn
uvicorn.run(app, host="0.0.0.0", port=7860)
if __name__ == "__main__":
main() |