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<!DOCTYPE html>
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<html lang="zh-CN">
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<head>
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<meta charset="UTF-8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<title>识别系统</title>
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<style>
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body {
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font-family: Arial, sans-serif;
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margin: 20px;
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padding: 20px;
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background-color: #f8f8f8;
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color: #333;
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}
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h1 {
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text-align: center;
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color: #009688;
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}
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p {
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color: #666;
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}
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ul {
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list-style-type: square;
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margin-left: 20px;
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}
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table {
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width: 100%;
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border-collapse: collapse;
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margin-top: 20px;
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}
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th,
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td {
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border: 1px solid #ddd;
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padding: 8px;
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text-align: center;
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}
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th {
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background-color: #f2f2f2;
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}
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img {
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max-width: 100%;
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height: auto;
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margin-top: 20px;
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}
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.module {
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padding: 10px;
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margin: 10px;
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border: 1px solid #009688;
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background-color: #e0f2f1;
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cursor: pointer;
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transition: background-color 0.3s;
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}
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.module:hover {
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background-color: #b2dfdb;
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}
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.return-btn {
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display: block;
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margin-top: 10px;
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padding: 10px;
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background-color: #138b5b;
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color: #fff;
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text-align: center;
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text-decoration: none;
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cursor: pointer;
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border-radius: 5px;
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}
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.return-btn:hover {
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background-color: #517900;
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}
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.link_button {
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margin: 10px 5%;
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padding: 10px 18px;
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color: #fff;
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font-size: 14px;
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font-weight: bold;
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border-radius: 4px;
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background: #08fd6a;
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text-decoration: none;
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top: 20px;
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position: relative;
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width: 600px;
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}
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.custom-file-upload {
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border: 1px solid #ccc;
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display: inline-block;
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padding: 6px 12px;
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cursor: pointer;
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background-color: #f1f1f1;
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color: #333;
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border-radius: 4px;
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font-size: 16px;
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}
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.custom-file-upload:hover {
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background-color: #e1e1e1;
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}
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.chart-container {
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display: flex;
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align-items: center;
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justify-content: center;
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}
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#uploadChart {
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max-width: 1000px;
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max-height: 600px;
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}
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a {
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color: #000;
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text-decoration: none;
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}
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</style>
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<script>
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document.addEventListener('DOMContentLoaded', function () {//从后端获取用户名
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var params = new URLSearchParams(window.location.search);
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var username = params.get('username');
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if (username) {
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document.getElementById('username1').textContent = username;
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}
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});
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document.addEventListener('DOMContentLoaded', function () {//从后端获取这个用户的身份（user/admin）
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var params = new URLSearchParams(window.location.search);
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if (userId === 'admin') {
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document.getElementById('managementBtn').style.display = 'block'; // 显示后台管理按钮
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} else {
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document.getElementById('managementBtn').style.display = 'none'; // 隐藏后台管理按钮
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}
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});
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</script>
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</head>
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<script src="https://cdn.jsdelivr.net/npm/chart.js"></script>
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<body>
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<!-- 把后端获取的用户名显示在欢迎标题上 -->
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<h1>欢迎您，尊敬的 <span id="username1"></span></h1>
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<p>欢迎访问识别系统！</p>
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<!-- 按钮列表 -->
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<div id="moduleSelection">
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<div class="module" onclick="openModule('reservation')">识别查询</div>
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<div class="module" onclick="openModule('management')" id="managementBtn">后台管理</div>
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<div class="module" onclick="logout()" id="managementBtn">退出登录</div>
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</div>
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<div id="reservation" style="display: none;">
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<h2>识别模块</h2>
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<p>在这里上传你的图片进行识别。</p>
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<form id="uploadForm" enctype="multipart/form-data">
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<label for="fileInput" class="custom-file-upload">
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<input type="file" id="fileInput" name="image" accept="image/*">
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选择文件
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</label>
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<button class="return-btn" type="button" onclick="uploadImage()">上传并识别</button>
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</form>
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<a href="#" class="return-btn" onclick="goBack()">返回</a>
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</div>
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<div id="management" style="display: none;">
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<h2>系统后台数据查询与管理模块</h2>
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<table width="90%" class="table" id="userTable">
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<tr>
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<th>用户名</th>
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<th>密码</th>
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<th>身份</th>
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<th>邮箱</th>
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<th>上传次数</th>
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<th>操作</th>
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</tr>
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</table>
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<h1>查询用户上传次数</h1>
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<div>
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<label for="username">用户名:</label>
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<input type="text" id="username">
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<button onclick="searchUser()">查询</button>
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</div>
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<div id="result"></div>
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<h1>上传文件统计</h1>
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<div>
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<div class="chart-container">
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<canvas id="uploadChart" width="800" height="400"></canvas>
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</div>
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</div>
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<script>
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function logout() {
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fetch(`/logout`).then(() => {
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window.location.href = '/welcome.html'
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})
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}
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let userId;
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function searchUser() {
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const username = document.getElementById('username').value;
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fetch(`/api/user-images-count?username=${encodeURIComponent(username)}`)
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.then(response => response.json())
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.then(data => {
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const resultDiv = document.getElementById('result');
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if (data.error) {
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resultDiv.innerText = data.error;
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} else {
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resultDiv.innerText = `${username} 上传了 ${data.imageCount} 张图片`;
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}
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})
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.catch(error => {
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console.error('Error:', error);
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document.getElementById('result').innerText = '查询过程中发生错误';
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});
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}
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let chartInstance;
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function renderChart() {
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fetch('/api/userUploads')
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.then(response => response.json())
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.then(data => {
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const ctx = document.getElementById('uploadChart').getContext('2d');
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const labels = data.map(item => item.username);
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const values = data.map(item => item.upload_count);
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if (chartInstance) {
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chartInstance.destroy();
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}
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chartInstance = new Chart(ctx, {
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type: 'bar',
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data: {
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labels: labels,
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datasets: [{
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label: '上传文件数量',
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data: values,
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backgroundColor: 'rgba(75, 192, 192, 0.2)',
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borderColor: 'rgba(75, 192, 192, 1)',
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borderWidth: 1
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}]
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},
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options: {
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scales: {
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y: {
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beginAtZero: 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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}
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document.addEventListener('DOMContentLoaded', function () {
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const userTable = document.getElementById('userTable');
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fetch('/api/users')
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.then(response => response.json())
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.then(users => {
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users.forEach(user => {
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const row = userTable.insertRow();
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row.innerHTML = `
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<td><input type="text" value="${user.name}" data-oldname="${user.name}" /></td>
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<td><input type="text" value="${user.passwd}" /></td>
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<td>${user.id}</td>
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<td><input type="text" value="${user.msg}" /></td>
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<td>${user.imageCount}</td>
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<td>
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<button onclick="updateUser(this)">更新</button>
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<button onclick="deleteUser(this)">删除</button>
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</td>
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`;
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});
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});
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renderChart()
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});
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function updateUser(button) {
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const row = button.parentElement.parentElement;
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const name = row.cells[0].children[0].value;
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const passwd = row.cells[1].children[0].value;
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const id = row.cells[2].children[0].value;
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const msg = row.cells[3].children[0].value;
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const oldName = row.cells[0].children[0].getAttribute('data-oldname');
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fetch('/api/updateUser', {
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method: 'POST',
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headers: { 'Content-Type': 'application/x-www-form-urlencoded' },
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body: new URLSearchParams({ name, passwd, id, msg, oldName })
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})
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.then(response => response.json())
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.then(data => {
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alert(data.message);
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});
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}
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function deleteUser(button) {
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const row = button.parentElement.parentElement;
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const name = row.cells[0].children[0].value;
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fetch('/api/deleteUser', {
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method: 'POST',
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headers: { 'Content-Type': 'application/x-www-form-urlencoded' },
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body: new URLSearchParams({ name })
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})
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.then(response => response.json())
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.then(data => {
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alert(data.message);
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if (data.message === '用户删除成功') {
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row.remove();
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}
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});
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}
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</script>
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<a href="#" class="return-btn" onclick="goBack()">返回模块选择</a>
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</div>
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<!-- 页尾的一些用户友好内容 -->
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<h2>联系我们</h2>
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<p>如有任何关于系统的疑问或建议，请联系我们：</p>
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<address>
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电子邮件：<a href="mailto:aa893824054@163.com">aa893824054@163.com</a><br>
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电话：184-7635-1355
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</address>
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<script src="https://cdnjs.cloudflare.com/ajax/libs/crypto-js/4.0.0/crypto-js.min.js"></script>
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<script>
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async function calculateHash(file) {
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return new Promise((resolve, reject) => {
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const reader = new FileReader();
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reader.onload = function(event) {
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const wordArray = CryptoJS.lib.WordArray.create(event.target.result);
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const hash = CryptoJS.SHA256(wordArray);
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resolve(hash.toString(CryptoJS.enc.Hex));
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};
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reader.onerror = reject;
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reader.readAsArrayBuffer(file);
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});
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}
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function getHostname() {
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var hostname = window.location.hostname;
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console.log("当前页面的主机名是：" + hostname);
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}
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getHostname(); // 调用函数来获取主机名
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// var port_count = 0 //（只有使用顺序分配策略时候才取消注释）
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async function uploadImage() {
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const fileInput = document.getElementById('fileInput');
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const file = fileInput.files[0];
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var urlParams = new URLSearchParams(window.location.search);
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var username = urlParams.get('username');
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var ports=[8084, 8085, 8086, 8087,8088]//识别功能端口组，一个口代表一个识别服务器
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var randomPort = ports[Math.floor(Math.random() * ports.length)];// 从端口数组中随机选择一个端口
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var host = window.location.hostname; // 获取当前页面的主机名
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if (!file) {
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alert('请选择一个文件');
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return;
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}
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try {
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const hashHex = await calculateHash(file);
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console.log('文件哈希值:', hashHex);
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const formData = new FormData(document.getElementById("uploadForm"));
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fetch('http://' + host + ':' + randomPort + '/api/upload?user_name=' + username + '&fileHash=' + hashHex, {//随机分配策略
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// fetch('http://' + host + ':' + ports[port_count] + '/api/upload?user_name=' + username + '&fileHash=' + hashHex, {//顺序分配策略
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method: 'POST',
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body: formData
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})
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.then(response => response.json())
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.then(data => {
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alert("识别结果: " + data.fileName);
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renderChart();
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// port_count = (port_count + 1) % ports.length;// 更新索引以循环使用端口数组(顺序分配时使用，用随机策略时要注释掉)
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})
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.catch(error => console.error('Error:', error));
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} catch (error) {
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console.error('Error calculating hash:', error);
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alert('计算文件哈希值时发生错误');
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}
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}
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function openModule(moduleId) {//打开模块的功能
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var modules = document.getElementsByClassName('module');
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for (var i = 0; i < modules.length; i++) {
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modules[i].style.display = 'none';
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}
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document.getElementById('moduleSelection').style.display = 'none';
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document.getElementById(moduleId).style.display = 'block';
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}
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document.addEventListener('DOMContentLoaded', function () {//监听程序，用来解决：点击返回按钮后重新出现“后台管理”按钮的问题
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var params = new URLSearchParams(window.location.search);
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if (username) {
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}
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updateManagementButtonDisplay(userId);
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})
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fetch('/user-info')
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.then(response => {
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if (!response.ok) {
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throw new Error('未登录');
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}
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return response.json();
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})
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.then(data => {
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document.getElementById('username1').textContent = data.username;
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userId = data.id
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username = data.username
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updateManagementButtonDisplay(userId);
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})
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.catch(error => {
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alert(error.message);
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window.location.href = 'welcome.html';
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});
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function updateManagementButtonDisplay(userId) {//根据身份设定“后台管理”按钮是否隐藏
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if (userId === 'admin') {
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document.getElementById('managementBtn').style.display = 'block';
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} else {
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document.getElementById('managementBtn').style.display = 'none';
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}
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}
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function goBack() {//返回功能，同时也是“不断监测id来决定是否隐藏’后台管理‘按钮”的功能的组成部分
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var modules = document.getElementsByClassName('module');
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for (var i = 0; i < modules.length; i++) {
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modules[i].style.display = 'block';
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}
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document.getElementById("moduleSelection").style.display = 'block';
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document.getElementById("reservation").style.display = 'none';
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document.getElementById("management").style.display = 'none';
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var params = new URLSearchParams(window.location.search);
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updateManagementButtonDisplay(userId);
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}
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</script>
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</body>
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</html> |
