nodejs实现聊天机器人功能

{
 "name": "bbs",
 "version": "1.0.0",
 "description": "",
 "main": "server.js",
 "scripts": {
 "test": "echo \"Error: no test specified\" && exit 1",
 "start": "node server.js"
 },
 "author": "",
 "license": "ISC",
 "dependencies": {
 "koa": "^2.8.1",
 "koa-route": "^3.2.0",
 "koa-websocket": "^6.0.0"
 }
}

const Koa = require('koa'),
  route = require('koa-route'),
  websockify = require('koa-websocket'),
  http = require('http'),
  app = websockify(new Koa());

app.ws.use(route.all('/', ctx => {
 // websocket作为“ctx.websocket”添加到上下文中。
 ctx.websocket.on('message', message => {
  startRequest(message, ctx);
 });
}));

function startRequest(message, ctx) {
 // 采用http模块向服务器发起一次get请求  
 http.get(`http://api.qingyunke.com/api.php?key=free&appid=0&msg=${encodeURI(message)}`, res => {
  // 防止中文乱码
  res.setEncoding('utf-8');
  // 监听data事件，每次取一块数据
  res.on('data', chunk => {
   ctx.websocket.send(JSON.parse(chunk).content);
  });
 }).on('error', err => {
  ctx.websocket.send('对不起，网络故障了');
 });}

// 监听端口、启动程序
app.listen(3000, err => {
 if (err) throw err;
 console.log('websocket服务器启动在3000端口');
})

 
 
 


 

  
实时聊天室
  

   
   
发送
  
  

   

  
 
 

* {
 padding: 0;
 margin: 0;
 -webkit-user-select: none;
 -moz-user-select: none;
}
html,
body {
 height: 100%;
 width: 100%;
 background-color: #333;
 position: relative;
 font-size: 12px;
}
.box {
 position: absolute;
 top: 50%;
 left: 50%;
 transform: translate(-50%, -50%);
 background-color: #eee;
 width: 320px;
 height: 564px;
 box-sizing: border-box;
}
.title {
 height: 40px;
 line-height: 40px;
 text-align: center;
 background-color: #000;
 color: #fff;
 position: relative;
 font-size: 16px;
}
.input-box {
 margin-top: 10px;
 position: absolute;
 bottom: 0;
 background-color: #fff;
 width: 100%;
 height: 40px;
 line-height: 32px;
 padding: 4px;
 padding-right: 0;
 box-sizing: border-box;
 display: -webkit-flex;
 display: -moz-flex;
 display: -ms-flex;
 display: -o-flex;
 display: flex;
 -ms-align-items: center;
 align-items: center;
 justify-content: space-between;
 border-top: 1px solid #eee;
}
.input {
 vertical-align: top;
 height: 32px;
 line-height: 32px;
 outline: none;
 border: 1px solid #ccc;
 padding: 0 4px;
 box-sizing: border-box;
 flex: 1;
 background-color: #eee;
 border-radius: 4px;
 margin-right: 10px;
 margin-left: 4px;
}
.input:focus {
 border: 1px solid #ccc;
}
.send {
 width: 80px;
 text-align: center;
 height: 32px;
 line-height: 32px;
 cursor: pointer;
 background-color: green;
 color: #fff;
 margin-right: 10px;
 font-size: 14px;
}
.send:active {
 opacity: 0.6;
}
li {
 list-style: none;
 padding: 6px 10px;
 box-sizing: border-box;
}
.my-say {
 text-align: right;
}
.say {
 display: inline-block;
 background-color: #fff;
 font-size: 12px;
 padding: 6px 4px;
 border-radius: 4px;
 margin-top: 1px;
 vertical-align: top;
 max-width: 220px;
}
.computer-say .sayman {
 background-color: #40E0D0;
}
.my-say .sayman {
 background-color: #FFA500;
}
.my-say .say {
 text-align: left;
}
.sayman {
 font-size: 10px;
 display: inline-block;
 height: 30px;
 width: 30px;
 background-color: #ccc;
 border-radius: 50%;
 text-align: center;
 line-height: 30px;
 overflow: hidden;
 text-overflow: ellipsis;
 white-space: nowrap;
 padding: 0 4px;
 box-sizing: border-box;
 margin: 0 4px;
 color: #fff;
}
.view {
 position: absolute;
 top: 40px;
 bottom: 40px;
 left: 0;
 width: 100%;
 padding: 10px 0;
 box-sizing: border-box;
 overflow-y: auto;
}

let submit = document.getElementById("submit"),
 pl = document.getElementById("pl");
// 很重要 必须写，判断浏览器是否支持websocket
let CreateWebSocket = (() => {
 return (urlValue) => {
  if (window.WebSocket) return new WebSocket(urlValue);
  if (window.MozWebSocket) return new MozWebSocket(urlValue);
  return false;
 }
})()
// 实例化websoscket websocket有两种协议ws(不加密)和wss(加密)
let webSocket = CreateWebSocket(`ws://127.0.0.1:3000`);
webSocket.onopen = evt => {
 addMsg(1, '你好，欢迎进入实时聊天室！')
}
webSocket.onmessage = evt => {
 // 这是服务端返回的数据
 addMsg(1, evt.data);
 submit.innerHTML = '发送';
}
// input事件发送数据
submit.onclick = (e) => {
 if (e.target.innerHTML == '回复中...') {
  return false
 }
 e.target.innerHTML = '回复中...';
 const str = document.getElementById("pl").value;
 webSocket.send(str);
 addMsg(2, str);
}
// 绑定回车事件
function keyEnter() {
 if (event.keyCode == 13) {
  document.getElementById("submit").click();
 }
}
// 添加消息
function addMsg(type, msg) {
 let li = document.createElement('li');
 // 1机器人/2自己
 if (type == 1) {
  li.classList.add('computer-say');
  li.innerHTML = `机器人${msg}`;
 } else {
  li.classList.add('my-say');
  li.innerHTML = `${msg}我`;
  pl.value = '';
 }
 document.getElementById('view').appendChild(li);
 document.getElementById('ulView').scrollTo(0, document.getElementById('view').clientHeight);
}