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from fastapi import FastAPI, Request, Form |
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from fastapi.responses import HTMLResponse |
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from fastapi.staticfiles import StaticFiles |
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from fastapi.templating import Jinja2Templates |
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import sys |
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import io |
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import json |
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app = FastAPI() |
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app.mount("/static", StaticFiles(directory="static"), name="static") |
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templates = Jinja2Templates(directory="templates") |
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def run_code_with_trace(code: str): |
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trace_data = [] |
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stdout_capture = io.StringIO() |
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def tracer(frame, event, arg): |
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if event == "line": |
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trace_data.append({ |
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"line": frame.f_lineno, |
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"locals": frame.f_locals.copy() |
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}) |
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return tracer |
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sys.settrace(tracer) |
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try: |
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exec(code, {}) |
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except Exception as e: |
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trace_data.append({"error": str(e)}) |
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finally: |
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sys.settrace(None) |
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output = stdout_capture.getvalue() |
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stdout_capture.close() |
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return trace_data, output |
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@app.get("/", response_class=HTMLResponse) |
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async def index(request: Request): |
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return templates.TemplateResponse("index.html", {"request": request}) |
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@app.post("/run", response_class=HTMLResponse) |
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async def run_code(request: Request, code: str = Form(...)): |
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trace, output = run_code_with_trace(code) |
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return templates.TemplateResponse( |
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"index.html", |
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{ |
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"request": request, |
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"trace_json": json.dumps(trace), |
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"output": output, |
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"code": code |
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} |
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) |
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