小程序无法添加header

[rzrobert]

const sendHeader = {
"pt": "weixin",
"sv": "18",
"lg": "zh-CN"
};
onSocket = io.connect(server, {
path: "/" + path,
transports: ['polling'],
transportOptions: {
polling: {
extraHeaders: sendHeader
}
}
});

[ccckblaze]

got it, it turns out a bug inside the code, some magic comes out!

-------------------------------step 1----------------------------------
const socket = io(url, {
transportOptions: {
websocket: {
extraHeaders: {
'x-clientid': 'abc'
}
}
}
});

---------------------------------step 2----------------------------------
in "weapp.socket.io.js" replace
{ "content-type": "application/json" }
with
Object.assign({ "content-type": "application/json" }, r.headers)

@rzrobert

[ccckblaze]

How NewBee i am!

[gongzili456]

@rzrobert weapp.socket.io not support polling transport

[gongzili456]

@rzrobert @ccckblaze 关于 header 的使用，socket.io 官方文档有给出解释, 在 websokcet transport 模式下无法自定义 header，而且小程序版本的 socket.io 是不支持 polling transport 的。

With extraHeaders
This only works if polling transport is enabled (which is the default). Custom headers will not be appended when using websocket as the transport. This happens because the WebSocket handshake does not honor custom headers. (For background see the WebSocket protocol RFC)