node.js - 前端websocket连接提示502 Bad GateWay

Question

在前端用websocket连接时提示说502 Bad GateWay，过了一会又自己连上了，这样体验很差啊。。。请问是什么原因呢？另外，前台关闭页面时，后台服务器没有即使获取disconnect事件。。。以上两个问题在本地测试时完全没问题。。后台用的是nodejs，（socket模块：socket.io）求教是怎么回事？！和解决办法～～

Answer 1

Search nginx websocket or nginx socket.io yourself

Don’t step on it

Answer 2

It should be a background program error...
I encountered a problem before. The background fetched data from the database. Because some fields had HTML and entities, and some did not, it caused a network request to the server 502. Later, I was able to basically conclude that 502 was a program problem...