<!DOCTYPE html>
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<html lang="zh">
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<head>
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<meta charset="UTF-8">
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<title>设备消息监控</title>
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<style>
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html, body {
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height: 100%;
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margin: 0;
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background-color: #3C3F41;
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}
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table {
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width: 100%;
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table-layout: fixed;
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border-collapse: collapse;
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}
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td {
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height: inherit;
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border: 1px solid #555;
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}
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select {
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width: 210px;
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height: 30px;
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margin: 0 auto 5px auto;
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color: #BABABA;
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font-size: 16px;
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padding: 2px;
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border: 1px solid #646464;
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background-color: #414141;
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}
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input {
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width: 100px;
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height: 23px;
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color: #BABABA;
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padding: 2px;
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border: 1px solid #646464;
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background-color: #414141;
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}
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button {
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width: 90px;
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color: #BABABA;
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font-size: 18px;
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border: 1px solid #4C708C;
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background-color: #365880;
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}
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button:active {
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color: #EEE;
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border: 1px solid #6B96B4;
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}
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p {
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color: #BABABA;
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text-align: left;
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white-space: pre-wrap;
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word-wrap: break-word;
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word-break: break-all;
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}
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a {
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color: #FFF;
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}
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.cell {
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height: inherit;
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text-align: center;
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display: flex;
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flex-direction: column;
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}
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.textarea {
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height: inherit;
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overflow: auto;
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background-color: #2B2B2B;
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}
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.tool {
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padding: 10px 0 10px 0;
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}
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::-webkit-scrollbar {
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width: 10px;
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}
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::-webkit-scrollbar-thumb {
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background-color: #666;
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}
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::-webkit-scrollbar-thumb:hover {
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background-color: #777;
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}
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</style>
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</head>
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<body>
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<table id="dev_box">
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<tr>
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<td>
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<div class="cell">
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<div class="textarea" id="dev_text_[idx]"></div>
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<div class="tool">
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<select id="dev_sel_[idx]">[option]</select>
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<input type="text" onkeyup="onSearch(this)">
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<button type="button" onclick="onSub([idx])">订阅</button>
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<button type="button" onclick="onUnsub([idx])">取消</button>
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<button type="button" onclick="$('dev_text_[idx]').innerHTML=''">清空</button>
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<button type="button" onclick="onExport([idx])">导出</button>
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</div>
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</div>
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</td>
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</tr>
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</table>
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<a href="?s=1,2" target="_blank">1*2</a>
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<a href="?s=1,4" target="_blank">1*4</a>
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<a href="?s=2,6" target="_blank">2*6</a>
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<script type="text/javascript">
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const reg = new RegExp("\\[([^\\[\\]]*?)]", 'igm'); //igm是指分别用于指定区分大小写的匹配、全局匹配和多行匹配。
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const host = window.location.host;
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const domain = '//' + host;
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let eventSource = null;
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const subscriptions = {};
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const $ = function (id) {
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return document.getElementById(id);
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};
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function getQueryVariable(key) {
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const query = window.location.search.substring(1);
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const paramsArr = query.split("&");
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for (let i = 0; i < paramsArr.length; i++) {
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const pair = paramsArr[i].split("=");
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if (pair[0] === key) {
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return pair[1];
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}
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}
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return null;
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}
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const renderForm = function (data) {
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let options = '<option value="">没有可订阅的设备</option>\n';
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if (data && data.length) {
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options = '<option value="">---请选择订阅设备---</option>\n';
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options += data.map(function (device) {
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return `<option value="${device.mobileNo}">${device.mobileNo} - ${device.plateNo}</option>`
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}).join('\n');
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}
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let size = [1, 1];
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const s = getQueryVariable('s');
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if (s)
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size = s.split(',');
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const row = size[0] > 3 ? 3 : size[0];
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const column = size[1] > 6 ? 6 : size[1];
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const height = Math.floor((document.documentElement.clientHeight) / row) - 1;
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const table = $('dev_box');
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const td = table.children[0].children[0].innerHTML;
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let html = '';
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let idx = 0;
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for (let i = 0; i < row; i++) {
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html += `<tr style="height: ${height}px">`;
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for (let j = 0; j < column; j++) {
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html += td.replace(reg, function (node, key) {
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return ({idx: idx, option: options})[key]
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});
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++idx;
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}
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html += '</tr>';
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}
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table.innerHTML = html;
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};
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function onSearch(e) {
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let value = e.value;
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let select = e.previousElementSibling;
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if (!select.disabled) {
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const options = select.querySelectorAll('option');
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options[0].selected = true;
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if (value) {
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options.forEach(option => {
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if (option.innerHTML.search(value) >= 0) {
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option.selected = true;
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}
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});
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}
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}
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}
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function onExport(idx) {
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const data = $('dev_text_' + idx).innerText;
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if (data) {
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const a = document.createElement('a');
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a.download = $('dev_sel_' + idx).value + '_' + new Date().toLocaleString().replaceAll(/[^0-9]/g, '_') + '.txt';
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a.href = 'data:text/plain;base64,' + btoa(unescape(encodeURIComponent(data)));
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a.click();
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}
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}
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function onSub(idx) {
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const select = $('dev_sel_' + idx);
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if (select.disabled) {
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return;
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}
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const clientId = select.value;
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if (!clientId) {
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return;
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}
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if (subscriptions[clientId]) {
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alert(`同一设备[${clientId}]不能重复订阅`);
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return;
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}
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select.disabled = true;
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const text = $('dev_text_' + idx);
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text.println = function (data) {
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const c = this.scrollTop + this.offsetHeight + 4;
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const h = this.scrollHeight;
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const p = document.createElement('p');
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p.append(new Date().toLocaleString().replaceAll('/', '-') + ' ');
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p.append(data);
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this.append(p);
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if (c >= h)
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this.scrollTop = this.scrollHeight;
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}
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eventSource.addEventListener(clientId, subscriptions[clientId] = function (event) {
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text.println(event.data);
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});
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fetch(`${domain}/device/sse?sub=1&clientId=${clientId}`, {method: 'post'})
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.then(res => res.json())
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.then(function (res) {
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if (res) {
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text.println('开始订阅');
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} else {
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text.println('订阅失败,请刷新页面');
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}
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}).catch(err => text.println('连接服务器失败'));
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}
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function onUnsub(idx) {
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const select = $('dev_sel_' + idx);
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const clientId = select.value;
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if (!clientId) {
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return;
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}
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fetch(`${domain}/device/sse?sub=0&clientId=${clientId}`, {method: 'post'})
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.then(res => res.json())
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.then(function (res) {
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if (res) {
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console.log(`取消订阅设备[${clientId}]....`);
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eventSource.removeEventListener(clientId, subscriptions[clientId]);
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delete subscriptions[clientId];
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select.disabled = false;
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$('dev_text_' + idx).println('结束订阅');
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}
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}).catch(err => console.error(err));
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}
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window.onload = function () {
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fetch(`${domain}/device/option`)
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.then(res => res.json())
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.then(function (res) {
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renderForm(res.data);
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eventSource = new EventSource(`${domain}/device/sse`);
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eventSource.addEventListener('open', function (e) {
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console.log(`建立连接`);
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});
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eventSource.addEventListener('error', function (e) {
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console.log(`断开连接`);
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});
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}).catch(err => console.error(err));
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}
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</script>
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</body>
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</html>
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