Independent Development

Connect to WebSocket provided by a Node.js server

Error

I used to connect to my Node.js server through WebSocket, but after I merged code to others, the connection was failed.

Solution

In fact it was an error introduced while merging code.

const server = http.createServer(app);
setupWebSocket(server);
// wrong code:
// app.listen(PORT, “0.0.0.0”, …);
// right code:
server.listen(PORT, “0.0.0.0”, …);

The wrong code will start a different server from the WebSocket server.
If not AI, I think it will take me years to find this error…

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独立开发

连接到Node.js服务器提供的WebSocket

问题

我用Node.js提供了WebSocket，前端一直可以连接，但是当我把代码和其它人的合并之后，就再也连不上了。

解决方案

实际上这是一个合并代码时引入的简单错误。

const server = http.createServer(app);
setupWebSocket(server);
// 错误代码：
// app.listen(PORT, “0.0.0.0”, …);
// 正确代码：
server.listen(PORT, “0.0.0.0”, …);

错误的代码会启动一个不同的没有在运行WebSocket的server。
很简单，但是如果没有AI帮忙，我都不知道得多久才能找到这个问题所在……

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