{
  "id": "python/flask-upload-file-too-large",
  "signature": "RequestEntityTooLarge: Request body is too large",
  "signature_zh": "请求实体过大：请求体太大",
  "regex": "RequestEntityTooLarge:\\ Request\\ body\\ is\\ too\\ large",
  "domain": "python",
  "category": "runtime_error",
  "subcategory": null,
  "root_cause": "上传文件大小超过Flask配置的MAX_CONTENT_LENGTH限制",
  "root_cause_type": "generic",
  "root_cause_zh": "上传文件大小超过Flask配置的MAX_CONTENT_LENGTH限制",
  "versions": [
    {
      "version": "3.x",
      "introduced": null,
      "deprecated": null,
      "removed": null,
      "behavior_change": null,
      "status": "active"
    }
  ],
  "os_specific": {},
  "dead_ends": [
    {
      "action": "在客户端限制文件大小但未修改服务器配置",
      "why_fails": "客户端限制不能阻止恶意请求",
      "fail_rate": 0.5,
      "condition": "",
      "sources": []
    },
    {
      "action": "使用try-except捕获RequestEntityTooLarge",
      "why_fails": "Flask在请求处理前就拒绝，无法在视图中捕获",
      "fail_rate": 0.4,
      "condition": "",
      "sources": []
    }
  ],
  "workarounds": [
    {
      "action": "增加MAX_CONTENT_LENGTH配置",
      "success_rate": 0.95,
      "how": "app.config['MAX_CONTENT_LENGTH'] = 16 * 1024 * 1024  # 16MB",
      "condition": "",
      "sources": []
    },
    {
      "action": "在请求处理前检查文件大小",
      "success_rate": 0.9,
      "how": "@app.before_request\ndef check_content_length():\n    if request.content_length > 10 * 1024 * 1024:\n        abort(413)",
      "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": 0.86,
  "fix_success_rate": 0.8,
  "resolvable": "true",
  "first_seen": "2024-03-10",
  "last_confirmed": "2025-01-01",
  "last_updated": "2025-01-01",
  "evidence_count": 0,
  "tags": [],
  "locale": "en",
  "aliases": []
}