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2. 消息推送主链路

2.1 链路全景

当用户在聊天中发送一条消息时，完整的推送链路如下：
用户 A 发送消息\n    │\n    ▼\nChatService.sendMessage()\n    │\n    ├─ 入库消息到 DB\n    ├─ S..."}],["$","meta","2",{"name":"keywords","content":"technology,software development,AI,Bohol,Philippines"}],["$","meta","3",{"name":"robots","content":"index, follow"}],["$","link","4",{"rel":"canonical","href":"https://tarsierlabs.app/zh/articles/end-to-end-push-notification/"}],["$","link","5",{"rel":"alternate","hrefLang":"en","href":"https://tarsierlabs.app/en/articles/end-to-end-push-notification/"}],["$","link","6",{"rel":"alternate","hrefLang":"ja","href":"https://tarsierlabs.app/ja/articles/end-to-end-push-notification/"}],["$","link","7",{"rel":"alternate","hrefLang":"ko","href":"https://tarsierlabs.app/ko/articles/end-to-end-push-notification/"}],["$","link","8",{"rel":"alternate","hrefLang":"fr","href":"https://tarsierlabs.app/fr/articles/end-to-end-push-notification/"}],["$","link","9",{"rel":"alternate","hrefLang":"de","href":"https://tarsierlabs.app/de/articles/end-to-end-push-notification/"}],["$","meta","10",{"name":"google-site-verification","content":"kzUfSifVDmWdNRVTtLPjlYBBUjeIjmXVDp-BYT_3JQo"}],["$","meta","11",{"property":"og:title","content":"端到端推送通知——NestJS Event-Driven FCM × Flutter 三层分发 × admin 后台管理"}],["$","meta","12",{"property":"og:description","content":"2. 消息推送主链路
\n2.1 链路全景
\n当用户在聊天中发送一条消息时，完整的推送链路如下：
\n用户 A 发送消息\n    │\n    ▼\nChatService.sendMessage()\n    │\n    ├─ 入库消息到 DB\n    ├─ S..."}],["$","meta","13",{"property":"og:image","content":"https://img.joyminis.com/cdn-cgi/image/width=1200,quality=75,f=auto,fit=scale-down/uploads/blog/cmowuzq1x0000pahatxmprtmt/f4601afa-8e81-4316-aeae-202a17a1d3c0.png"}],["$","meta","14",{"property":"og:image:width","content":"1200"}],["$","meta","15",{"property":"og:image:height","content":"630"}],["$","meta","16",{"property":"og:image:alt","content":"端到端推送通知——NestJS Event-Driven FCM × Flutter 三层分发 × admin 后台管理"}],["$","meta","17",{"property":"og:type","content":"article"}],["$","meta","18",{"property":"article:modified_time","content":"2026-05-09T04:36:04.107Z"}],["$","meta","19",{"property":"article:author","content":"Tarsier Labs"}],["$","meta","20",{"name":"twitter:card","content":"summary_large_image"}],["$","meta","21",{"name":"twitter:title","content":"端到端推送通知——NestJS Event-Driven FCM × Flutter 三层分发 × admin 后台管理"}],["$","meta","22",{"name":"twitter:description","content":"2. 消息推送主链路
\n2.1 链路全景
\n当用户在聊天中发送一条消息时，完整的推送链路如下：
\n用户 A 发送消息\n    │\n    ▼\nChatService.sendMessage()\n    │\n    ├─ 入库消息到 DB\n    ├─ S..."}],["$","meta","23",{"name":"twitter:image","content":"https://img.joyminis.com/cdn-cgi/image/width=1200,quality=75,f=auto,fit=scale-down/uploads/blog/cmowuzq1x0000pahatxmprtmt/f4601afa-8e81-4316-aeae-202a17a1d3c0.png"}],["$","link","24",{"rel":"icon","href":"/favicon.ico","type":"image/x-icon"}],["$","link","25",{"rel":"icon","href":"/icons/favicon-16x16.png","sizes":"16x16","type":"image/png"}],["$","link","26",{"rel":"icon","href":"/icons/favicon-32x32.png","sizes":"32x32","type":"image/png"}],["$","link","27",{"rel":"icon","href":"/icons/icon-192x192.png","sizes":"192x192","type":"image/png"}],["$","link","28",{"rel":"icon","href":"/icons/icon-512x512.png","sizes":"512x512","type":"image/png"}],["$","link","29",{"rel":"apple-touch-icon","href":"/icons/apple-touch-icon.png","sizes":"180x180","type":"image/png"}],["$","link","30",{"rel":"apple-touch-icon","href":"/icons/apple-touch-icon-152x152.png","sizes":"152x152","type":"image/png"}],["$","link","31",{"rel":"apple-touch-icon","href":"/icons/apple-touch-icon-167x167.png","sizes":"167x167","type":"image/png"}],["$","link","32",{"rel":"apple-touch-icon","href":"/icons/apple-touch-icon-120x120.png","sizes":"120x120","type":"image/png"}]],"error":null,"digest":"$undefined"}