336 lines
10 KiB
HTML
336 lines
10 KiB
HTML
<!DOCTYPE html>
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<html lang="zh-CN">
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<head>
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<link rel="icon" type="image/png" href="/NIKO.png" th:href="@{/NIKO.png}">
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<title>BAOGUTANG-FILE</title>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
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<meta name="HandheldFriendly" content="True"/>
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<meta name="MobileOptimized" content="320"/>
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<meta http-equiv="Cache-Control" content="max-age=7200"/>
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<meta http-equiv="X-UA-Compatible" content="IE=edge"/>
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<meta name="viewport" content="width=device-width, initial-scale=1">
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<meta name="robots" content="all"/>
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<meta name="author" content="BAOGUTANG-FILE"/>
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<link href="/css/bootstrap.min.css" rel="stylesheet" th:href="@{/css/bootstrap.min.css}">
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<link href="/css/font-awesome.min.css" rel="stylesheet" th:href="@{/css/font-awesome.min.css}">
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<link href="/css/base.css" rel="stylesheet" th:href="@{/css/base.css}">
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<style>
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body {
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font-family: "Microsoft YaHei", Arial, sans-serif;
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background-color: #f7f8fa;
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margin: 0;
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padding: 0;
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}
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.container {
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max-width: 1200px;
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margin: 20px auto;
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padding: 20px;
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background: #fff;
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border: 1px solid #ddd;
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border-radius: 5px;
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box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
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}
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h3 {
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color: #444;
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margin-bottom: 10px;
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}
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.section {
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margin-bottom: 30px;
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}
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label {
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font-weight: bold;
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margin-bottom: 5px;
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display: block;
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}
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input[type="file"], textarea, button {
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width: 100%;
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margin-bottom: 10px;
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padding: 10px;
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border: 1px solid #ddd;
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border-radius: 3px;
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font-size: 14px;
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}
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button {
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background-color: rgb(98, 210, 161);
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color: white;
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cursor: pointer;
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border: none;
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}
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button:hover {
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background-color: rgba(98, 210, 161, 0.8);
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}
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textarea {
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height: 150px;
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resize: none;
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}
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.preview {
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margin-top: 10px;
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min-height: 200px;
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transition: opacity 0.3s ease; /* 添加过渡 */
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opacity: 1;
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}
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.preview.hide {
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opacity: 0;
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}
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img, iframe {
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max-width: 100%;
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border: 1px solid #ddd;
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border-radius: 3px;
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}
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iframe {
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height: 80vh;
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}
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.download-link {
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display: block;
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margin-top: 10px;
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color: rgb(98, 210, 161);
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text-decoration: none;
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font-weight: bold;
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}
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.download-link:hover {
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text-decoration: underline;
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}
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.divider {
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margin: 30px 0;
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border-top: 1px solid #ddd;
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}
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.type-options {
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display: flex;
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gap: 10px;
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margin-bottom: 10px;
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flex-wrap: wrap;
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}
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.type-option {
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flex: 0 0 auto;
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padding: 10px;
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border: 1px solid #ddd;
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border-radius: 3px;
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cursor: pointer;
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background-color: #fff;
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font-size: 14px;
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color: #333;
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text-align: center;
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user-select: none;
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transition: background-color 0.2s;
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}
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.type-option:hover {
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background-color: #eee;
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}
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.type-option.active {
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background-color: rgb(98, 210, 161);
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color: #fff;
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border-color: rgb(98, 210, 161);
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}
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</style>
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</head>
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<body style="over-flow:hidden;">
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<header class="header">
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<div class="row-fluid">
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<div class="col-md-5" style="position:relative;">
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<span class="logo">BAOGUTANG-FILE</span>
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</div>
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<nav class="col-md-7" style="padding:10px 0;" align="right">
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</nav>
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<br style="clear:both;"/>
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</div>
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</header>
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<div class="container">
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<!-- 文件转 Base64 -->
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<div class="section">
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<h3>文件转 Base64</h3>
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<input type="file" id="fileInput" />
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<button onclick="convertToBase64()">转换为 Base64</button>
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<label for="base64Output">Base64 输出</label>
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<textarea id="base64Output" readonly placeholder="Base64 输出"></textarea>
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</div>
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<div class="divider"></div>
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<!-- Base64 转文件 -->
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<div class="section">
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<h3>Base64 转文件</h3>
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<textarea id="base64Input" placeholder="粘贴 Base64 字符串"></textarea>
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<div class="type-options" id="typeOptions">
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<div class="type-option" data-type="auto">自动识别</div>
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<div class="type-option" data-type="image/png">图片(PNG)</div>
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<div class="type-option" data-type="image/jpeg">图片(JPEG)</div>
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<div class="type-option" data-type="video/mp4">视频(MP4)</div>
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<div class="type-option" data-type="application/pdf">PDF文件</div>
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<div class="type-option" data-type="text/plain">文本文件</div>
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<div class="type-option" data-type="application/octet-stream">通用文件</div>
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</div>
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<button onclick="convertToFile()">转换为文件并预览</button>
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<div class="preview hide" id="previewArea"></div>
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</div>
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</div>
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<script>
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let selectedType = 'auto';
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window.addEventListener('DOMContentLoaded', () => {
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resetTypeSelection();
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});
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function resetTypeSelection() {
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const typeOptions = document.querySelectorAll('.type-option');
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typeOptions.forEach(option => {
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option.classList.remove('active');
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if(option.dataset.type === 'auto') {
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option.classList.add('active');
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selectedType = 'auto';
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}
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});
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}
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document.getElementById('typeOptions').addEventListener('click', (e) => {
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if (e.target.classList.contains('type-option')) {
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const typeOptions = document.querySelectorAll('.type-option');
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typeOptions.forEach(option => option.classList.remove('active'));
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e.target.classList.add('active');
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selectedType = e.target.dataset.type;
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}
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});
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function convertToBase64() {
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const fileInput = document.getElementById('fileInput');
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const base64Output = document.getElementById('base64Output');
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if (!fileInput.files || fileInput.files.length === 0) {
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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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const file = fileInput.files[0];
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const reader = new FileReader();
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reader.onload = function (e) {
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base64Output.value = e.target.result;
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};
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reader.onerror = function () {
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alert('文件读取失败！');
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};
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reader.readAsDataURL(file);
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}
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function convertToFile() {
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const base64Input = document.getElementById('base64Input');
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const previewArea = document.getElementById('previewArea');
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let inputValue = base64Input.value.trim();
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if (!inputValue) {
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alert('请提供有效的 Base64 字符串！');
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resetTypeSelection();
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return;
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}
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// 隐藏预览区（淡出）
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previewArea.classList.add('hide');
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let finalBase64 = inputValue;
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let mimeType = '';
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if (selectedType === 'auto') {
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let headerMatch = finalBase64.match(/^data:(.*);base64,/);
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if (headerMatch) {
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mimeType = headerMatch[1];
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finalBase64 = finalBase64.substring(finalBase64.indexOf(',')+1);
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} else {
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mimeType = 'application/octet-stream';
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}
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} else {
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finalBase64 = finalBase64.replace(/^data:.*;base64,/, '');
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mimeType = selectedType;
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}
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const binary = atob(finalBase64);
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const arrayBuffer = new Uint8Array(binary.length);
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for (let i = 0; i < binary.length; i++) {
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arrayBuffer[i] = binary.charCodeAt(i);
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}
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const blob = new Blob([arrayBuffer], { type: mimeType });
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const fileUrl = URL.createObjectURL(blob);
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const fragment = document.createDocumentFragment();
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const downloadLink = document.createElement('a');
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downloadLink.href = fileUrl;
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downloadLink.download = 'converted_file';
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downloadLink.textContent = '点击下载文件';
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downloadLink.className = 'download-link';
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fragment.appendChild(downloadLink);
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if (mimeType.startsWith('image/')) {
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const img = document.createElement('img');
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img.src = fileUrl;
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fragment.appendChild(img);
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updatePreview(fragment);
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} else if (mimeType === 'application/pdf') {
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const iframe = document.createElement('iframe');
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iframe.src = fileUrl;
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fragment.appendChild(iframe);
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updatePreview(fragment);
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} else if (mimeType.startsWith('text/')) {
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const reader = new FileReader();
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reader.onload = function (e) {
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const textArea = document.createElement('textarea');
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textArea.value = e.target.result;
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textArea.style.width = '100%';
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textArea.style.height = '200px';
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fragment.appendChild(textArea);
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updatePreview(fragment);
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};
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reader.readAsText(blob);
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} else if (mimeType.startsWith('video/')) {
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const video = document.createElement('video');
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video.controls = true;
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video.src = fileUrl;
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fragment.appendChild(video);
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updatePreview(fragment);
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} else {
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// 其他类型，不预览，只提供下载
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updatePreview(fragment);
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}
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function updatePreview(fragment) {
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// 将新内容插入前，先等待CSS过渡结束后再显示，减少闪动感
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// 这里可以直接替换内容，然后在下一个事件循环中取消hide类以渐显
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previewArea.innerHTML = '';
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previewArea.appendChild(fragment);
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// 使用requestAnimationFrame在下一帧再移除'hide'类，保证CSS有机会渲染
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requestAnimationFrame(() => {
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previewArea.classList.remove('hide');
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});
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}
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}
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</script>
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</body>
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</html>
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