{
  "added_at": "2026-11-08",
  "category": "reconstruction-cases",
  "class": "website",
  "description_en": "FacebookUnsentMessage recreates the Messenger web client's MQTT-over-WebSocket history sync channel in Node.js. It authenticates with the user's browser cookies, requests replay from a sequence ID and scans message deltas for a specified message ID.",
  "description_zh": "FacebookUnsentMessage 用 Node.js 重现 Messenger 网页客户端的 MQTT-over-WebSocket 历史同步通道。它使用用户浏览器 Cookie 认证，从指定序列号请求重放，并在消息增量中查找目标消息 ID。",
  "entry_url": "https://awesomerea.org/resources/facebook-unsent-message-case/",
  "entry_url_zh": "https://awesomerea.org/zh/resources/facebook-unsent-message-case/",
  "evidence_class": 2,
  "evidence_status": "observed",
  "evidence_url": "https://github.com/khangzxrr/FacebookUnsentMessage/blob/40d28038c268a7bc83c81347db03f1855261dbe9/README.md",
  "group": "cases",
  "id": "facebook-unsent-message-case",
  "json_url": "https://awesomerea.org/resources/facebook-unsent-message-case/record.json",
  "kind": "case-study",
  "markdown_url": "https://awesomerea.org/resources/facebook-unsent-message-case/index.md",
  "markdown_url_zh": "https://awesomerea.org/zh/resources/facebook-unsent-message-case/index.md",
  "name": "FacebookUnsentMessage: reconstructing Messenger history sync",
  "name_zh": "FacebookUnsentMessage：重现 Messenger 历史消息同步",
  "record_type": "resource",
  "relationship": "independent-reconstruction",
  "requirement_facets": [
    "prerequisites",
    "limits",
    "license"
  ],
  "requirements": [
    "Node.js, an account owned by the user, its browser session cookies and a message ID.",
    "The author describes it as a July 2021 experiment whose undocumented Messenger behavior may have changed.",
    "The package.json declares an ISC license; no licence file is present."
  ],
  "requirements_zh": [
    "需要 Node.js、用户自己的账号及浏览器会话 Cookie，还有目标消息 ID。",
    "作者称这是 2021 年 7 月的实验，所依赖的 Messenger 内部行为可能已改变。",
    "package.json 声明 ISC 许可证；仓库没有独立许可证文件。"
  ],
  "scope": "unknown",
  "targets": [
    "protocol",
    "website"
  ],
  "url": "https://github.com/khangzxrr/FacebookUnsentMessage",
  "verification": "source-reviewed",
  "verified_at": "2026-11-06"
}