{"record":{"id":"0248b191ebe6bd66","repo":"Zie619/n8n-workflows","slug":"rate-limit-exceeded-please-try-again-later","errorCode":null,"errorMessage":"Rate limit exceeded. Please try again later.","messagePattern":"Rate limit exceeded\\. Please try again later\\.","errorType":"http","errorClass":"HTTPException","httpStatus":429,"severity":"warning","filePath":"api_server.py","lineNumber":320,"sourceCode":"    except Exception as e:\n        raise HTTPException(\n            status_code=500, detail=f\"Error searching workflows: {str(e)}\"\n        )\n\n\n@app.get(\"/api/workflows/{filename}\")\nasync def get_workflow_detail(filename: str, request: Request):\n    \"\"\"Get detailed workflow information including raw JSON.\"\"\"\n    try:\n        # Security: Validate filename to prevent path traversal\n        if not validate_filename(filename):\n            print(f\"Security: Blocked path traversal attempt for filename: {filename}\")\n            raise HTTPException(status_code=400, detail=\"Invalid filename format\")\n\n        # Security: Rate limiting\n        client_ip = request.client.host if request.client else \"unknown\"\n        if not check_rate_limit(client_ip):\n            raise HTTPException(\n                status_code=429, detail=\"Rate limit exceeded. Please try again later.\"\n            )\n\n        # Get workflow metadata from database\n        workflows, _ = db.search_workflows(f'filename:\"{filename}\"', limit=1)\n        if not workflows:\n            raise HTTPException(\n                status_code=404, detail=\"Workflow not found in database\"\n            )\n\n        workflow_meta = workflows[0]\n\n        # Load raw JSON from file with security checks\n        workflows_path = Path(\"workflows\").resolve()\n\n        # Find the file safely\n        matching_file = None\n        for subdir in workflows_path.iterdir():","sourceCodeStart":302,"sourceCodeEnd":338,"githubUrl":"https://github.com/Zie619/n8n-workflows/blob/94007c1445d9258a7da116646b79473e7c7c3282/api_server.py#L302-L338","documentation":"A 429 from GET /api/workflows/{filename} when check_rate_limit(client_ip) returns False. The server keeps a per-IP sliding/fixed window of allowed requests; exceeding it within the window raises HTTPException(429) with this message. It protects the file-detail endpoint from hammering.","triggerScenarios":"Rapidly opening many workflow detail views from one IP (each click fires at least one request), automated scraping of /api/workflows/<name>, or a page-load sequence that fans out several detail requests concurrently.","commonSituations":"Browsing the gallery quickly in a demo; running load tests against the API; sharing an IP (office NAT/proxy) so many users collectively exhaust the limit.","solutions":["Wait for the rate-limit window to expire (typically seconds to a minute) before retrying.","Cache detail responses client-side so revisiting a workflow does not re-hit the API.","Reduce burstiness: debounce UI actions that trigger detail fetches.","If you operate the server and the limit is genuinely too low, adjust the limit parameters in check_rate_limit()/its config rather than removing the check."],"exampleFix":"// before\nconst data = await this.apiCall(`/workflows/${name}`);\n\n// after (simple per-key client cache + backoff on 429)\nif (!this._detailCache[name]) {\n  for (let attempt = 0; attempt < 3; attempt++) {\n    try { this._detailCache[name] = await this.apiCall(`/workflows/${name}`); break; }\n    catch (e) { if (!e.message.includes('429')) throw e; await new Promise(r => setTimeout(r, 1000 * (attempt + 1))); }\n  }\n}","handlingStrategy":"retry","validationCode":null,"typeGuard":null,"tryCatchPattern":"try {\n  detail = await apiCall(`/workflows/${name}`);\n} catch (e) {\n  if (String(e.message).includes('429')) {\n    await sleep(1500);            // let the window reset\n    detail = await apiCall(`/workflows/${name}`);\n  } else throw e;\n}","preventionTips":["Cache detail responses by filename.","Debounce rapid detail-view navigation in the UI.","Treat 429 as backoff signal, never as an error to surface to the user."],"tags":["fastapi","rate-limiting","http-429","security"],"backgroundTag":null,"analyzedSha":"94007c1445d9258a7da116646b79473e7c7c3282","analyzedAt":"2026-08-15T04:10:37.591Z","schemaVersion":2},"datasetVersion":"2026-08-15T22:17:37.221Z"}