WebSocket

WebSocket

Summary

WebSockets 是一种先进的技术, 这使得在用户的 H5/iOS/Android 和一个服务器之间打开一个的交互式通信会话成为可能, 有了这个 API,你可以向服务器发送消息, 并接收事件驱动的响应, 无需轮询服务器的响应

注意:

API

WebSocket(url, protocol)

创建 WebSockets,并连接服务器

Arguments

  • url {string}: 表示要连接的 URL;
  • protocol {string}: WebSockets 协议

send(data)

通过WebSocket连接向服务器发送数据

Arguments

  • data{string}:要发送到服务器的数据

close(code,reason)

关闭 WebSockets 的链接

Arguments

  • code {number}: 关闭连接的状态号.
  • reason {string}: 关闭的原因

onopen(options)

链接打开的监听

Arguments

  • options {object}: 一个空的对象

onmessage(options)

消息事件的监听器

Arguments

  • options {object}: 服务器返回的消息对象
    • data {string}: 监听器接收的到的消息

onclose(options)

关闭事件的监听器

Arguments

  • options {object}: 监听器接收到的对象
    • code {number}: 服务器返回关闭的状态码
    • reason {string}: 服务器返回的关闭原因
    • wasClean {boolen}: 是否完全关闭.

onerror(options)

错误事件的监听器

Arguments

  • options {object}: 错误信息的事件
    • data {string}: 监听器接收到的信息

Example

<template>
<scroller>
<div>
<div style="background-color: #286090">
<text class="title" style="height: 80 ;padding: 20;color: #FFFFFF">websocket</text>
</div>
<input
type="text"
placeholder="please input message to send"
class="input"
autofocus="false"
value=""
onchange="onchange"
oninput="oninput"
id = "input"
/>
<div style="flex-direction: row; justify-content: center;">
<text class="button" onclick="{{connect}}">connect</text>
<text class="button" onclick="{{send}}">send</text>
<text class="button" onclick="{{close}}">close</text>
</div>
<div style="background-color: #D3D3D3;margin-top: 20">
<text class="title" style="height: 80 ;padding: 20;color: #000000">method = send</text>
</div>
<text style="color: #000000;height: 80">{{sendinfo}}</text>
<div style="background-color: #D3D3D3">
<text class="title" style="height: 80 ;padding: 20;color: #000000">method = onopen</text>
</div>
<text style="color: #000000;height: 80">{{onopeninfo}}</text>
<div style="background-color: #D3D3D3">
<text class="title" style="height: 80 ;padding: 20;color: #000000">method = onmessage</text>
</div>
<text style="color: #000000;height: 100">{{onmessage}}</text>
<div style="background-color: #D3D3D3">
<text class="title" style="height: 80 ;padding: 20;color: #000000">method = onclose</text>
</div>
<text style="color: #000000;height: 80">{{oncloseinfo}}</text>
<div style="background-color: #D3D3D3">
<text class="title" style="height: 80 ;padding: 20;color: #000000">method = onerror</text>
</div>
<text style="color: #000000;height: 80">{{onerrorinfo}}</text>
<div style="background-color: #D3D3D3">
<text class="title" style="height: 80 ;padding: 20;color: #000000">method = close</text>
</div>
<text style="color: #000000;height: 80">{{closeinfo}}</text>
</div>
</div>
</scroller>
</template>
<style>
.input {
font-size: 40;
height: 80;
width: 600;
}
.button {
font-size: 36;
width: 150;
color: #41B883;
text-align: center;
padding-top: 10;
padding-bottom: 10;
border-width: 2;
border-style: solid;
margin-right: 20;
border-color: rgb(162, 217, 192);
background-color: rgba(162, 217, 192, 0.2);
}
</style>
<script>
var websocket = require('@weex-module/webSocket');
module.exports = {
data: {
connectinfo: '',
sendinfo: '',
onopeninfo: '',
onmessage: '',
oncloseinfo: '',
onerrorinfo: '',
closeinfo: '',
txtInput:'',
navBarHeight: 88,
title: 'Navigator',
dir: 'examples',
baseURL: '',
},
methods: {
connect:function() {
websocket.WebSocket('ws://echo.websocket.org','');
var self = this;
self.onopeninfo = 'connecting...'
websocket.onopen = function(e)
{
self.onopeninfo = 'websocket open';
}
websocket.onmessage = function(e)
{
self.onmessage = e.data;
}
websocket.onerror = function(e)
{
self.onerrorinfo = e.data;
}
websocket.onclose = function(e)
{
self.onopeninfo = '';
self.onerrorinfo = e.code;
}
},
send:function(e) {
var input = this.$el('input');
input.blur();
websocket.send(this.txtInput);
this.sendinfo = this.txtInput;
},
oninput: function(event) {
this.txtInput = event.value;
},
close:function(e) {
websocket.close();
},
}
};
</script>

Have a try