{
  "id": "python/starlette-request-stream-error",
  "signature": "RuntimeError: The request body is already consumed",
  "signature_zh": "运行时错误：请求体已被消费",
  "regex": "RuntimeError:\\ The\\ request\\ body\\ is\\ already\\ consumed",
  "domain": "python",
  "category": "data_error",
  "subcategory": null,
  "root_cause": "Starlette 请求体流被多次读取或消费",
  "root_cause_type": "generic",
  "root_cause_zh": "Starlette 请求体流被多次读取或消费",
  "versions": [
    {
      "version": "3.10",
      "introduced": null,
      "deprecated": null,
      "removed": null,
      "behavior_change": null,
      "status": "active"
    },
    {
      "version": "3.11",
      "introduced": null,
      "deprecated": null,
      "removed": null,
      "behavior_change": null,
      "status": "active"
    }
  ],
  "os_specific": {},
  "dead_ends": [
    {
      "action": "重新读取已消费的流",
      "why_fails": "流不可重置",
      "fail_rate": 0.9,
      "condition": "",
      "sources": []
    },
    {
      "action": "复制请求体到内存",
      "why_fails": "可能消耗大量内存",
      "fail_rate": 0.6,
      "condition": "",
      "sources": []
    }
  ],
  "workarounds": [
    {
      "action": "一次性消费请求体并缓存",
      "success_rate": 0.95,
      "how": "body = await request.body()\n# 后续使用 body 而非再次读取流",
      "condition": "",
      "sources": []
    },
    {
      "action": "使用中间件缓存请求体",
      "success_rate": 0.9,
      "how": "@app.middleware('http')\nasync def cache_body(request, call_next):\n    if request.method in ['POST', 'PUT']:\n        body = await request.body()\n        request.state.body = body\n    return await call_next(request)",
      "condition": "",
      "sources": []
    }
  ],
  "workarounds_zh": [],
  "transition_graph": {
    "leads_to": [],
    "preceded_by": [],
    "frequently_confused_with": []
  },
  "official_doc_url": null,
  "official_doc_section": null,
  "error_code": null,
  "verification_tier": "ai_generated",
  "confidence": 0.83,
  "fix_success_rate": 0.8,
  "resolvable": "true",
  "first_seen": "2025-11-01",
  "last_confirmed": "2025-01-01",
  "last_updated": "2025-01-01",
  "evidence_count": 0,
  "tags": [],
  "locale": "en",
  "aliases": []
}