微信小程序，简称小程序，英文名Mini Program，是一种不需要下载安装即可使用的应用，它实现了应用“触手可及”的梦想，用户扫一扫或搜一下即可打开应用。小程序是一种不用下载就能使用的应用，也是一项门槛非常高的创新，经过将近两年的发展，已经构造了新的小程序开发环境和开发者生态。
这篇文章主要介绍了微信小程序 SocketIO 的相关资料,这里给大家提供了一个简单实例，需要的朋友可以参考下
微信小程序 ScoketIO 简单实例：
现在好的人在搞微信小程序，ScoketIO 是微信的网络通信，它的重要性不言而喻，这里给大家讲讲如何使用以及注意事项！
微信小程序 的SocketIO 实现，基于CFETram 的实现基础上完善
const emitter = require('./emitter.js');
/** socket.io 协议常量 */
var packets = {
open: 0 // non-ws
, close: 1 // non-ws
, ping: 2
, pong: 3
, message: 4
, upgrade: 5
, noop: 6
};
var events = {
CONNECT: 0,
DISCONNECT: 1,
EVENT: 2,
ACK: 3,
ERROR: 4,
BINARY_EVENT: 5,
BINARY_ACK: 6
};
const PING_CHECK_INTERVAL = 2000;
class WxSocketIO {
connect(url) {
return new Promise((resolve, reject) => {
wx.onSocketOpen((response) => {
this.isConnected = true;
//this.ping();
resolve(response);
});
wx.onSocketError(error => {
if (this.isConnected) {
this.fire('error', error);
} else {
reject(error);
}
});
wx.onSocketMessage(message => this._handleMessage(message));
wx.onSocketClose(result => {
if (this.isConnected) {
this.fire('error', new Error("The websocket was closed by server"));
} else {
this.fire('close');
}
this.isConnected = false;
this.destory();
});
wx.connectSocket({
url: `${url}/?EIO=3&transport=websocket`
});
});
}
ping() {
setTimeout(() => {
if (!this.isConnected) return;
wx.sendSocketMessage({
data: [packets.ping, 'probe'].join('')
});
}, PING_CHECK_INTERVAL);
}
close() {
return new Promise((resolve, reject) => {
if (this.isConnected) {
this.isConnected = false;
wx.onSocketClose(resolve);
wx.closeSocket();
} else {
reject(new Error('socket is not connected'));
}
});
}
emit(type, ...params) {
const data = [type, ...params];
wx.sendSocketMessage({
data: [packets.message, events.EVENT, JSON.stringify(data)].join("")
});
}
destory() {
this.removeAllListeners();
}
_handleMessage({ data }) {
const [match, packet, event, content] = /^(\d)(\d?)(.*)$/.exec(data);
if (+event === events.EVENT) {
switch (+packet) {
case packets.message:
let pack;
try {
pack = JSON.parse(content);
} catch (error) {
console.error('解析 ws 数据包失败：')
console.error(error);
}
const [type, ...params] = pack;
this.fire(type, ...params);
break;
}
}
else if (+packet == packets.pong) {
this.ping();
}
}
};
emitter.setup(WxSocketIO.prototype);
module.exports = WxSocketIO;