node-format-converter
Version:
Universal file format conversion service for Node.js
222 lines (202 loc) • 7.94 kB
JavaScript
const express = require('express');
const path = require('path');
const converter = require('../index');
// 初始化转换器，确保必要目录存在
const { uploadsDir, convertedDir } = converter.init();
console.log(`Uploads directory: ${uploadsDir}`);
console.log(`Converted files directory: ${convertedDir}`);
// 创建Express应用
const app = express();
const PORT = process.env.PORT || 3000;
// 使用转换器的Express路由 - 注意这里现在会返回一个配置好的路由
const convertRouter = converter.getExpressRouter({
maxFileSize: 200 * 1024 * 1024, // 设置最大文件大小为200MB
});
app.use('/convert', convertRouter);
// 添加一个简单的前端页面，展示如何使用转换服务
app.get('/', (req, res) => {
res.send(`
<html>
<head>
<title>文件格式转换器</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<style>
body {
font-family: Arial, sans-serif;
max-width: 800px;
margin: 0 auto;
padding: 20px;
}
.container {
border: 1px solid #ddd;
padding: 20px;
border-radius: 5px;
}
.form-group {
margin-bottom: 15px;
}
label {
display: block;
margin-bottom: 5px;
font-weight: bold;
}
button {
background-color: #4CAF50;
color: white;
padding: 10px 15px;
border: none;
border-radius: 4px;
cursor: pointer;
}
select, input[type="file"] {
width: 100%;
padding: 8px;
border: 1px solid #ddd;
border-radius: 4px;
box-sizing: border-box;
}
pre {
background-color: #f5f5f5;
padding: 10px;
border-radius: 5px;
overflow: auto;
}
</style>
</head>
<body>
<h1>文件格式转换服务</h1>
<div class="container">
<form id="convertForm" enctype="multipart/form-data">
<div class="form-group">
<label for="file">选择文件:</label>
<input type="file" id="file" name="file" required>
</div>
<div class="form-group">
<label for="format">目标格式:</label>
<select id="format" name="format" required>
<option value="">-- 选择格式 --</option>
<optgroup label="图片格式">
<option value="jpg">JPG</option>
<option value="png">PNG</option>
<option value="webp">WebP</option>
<option value="avif">AVIF</option>
<option value="tiff">TIFF</option>
</optgroup>
<optgroup label="视频格式">
<option value="mp4">MP4</option>
<option value="avi">AVI</option>
<option value="mkv">MKV</option>
<option value="mov">MOV</option>
</optgroup>
<optgroup label="音频格式">
<option value="mp3">MP3</option>
<option value="wav">WAV</option>
<option value="flac">FLAC</option>
<option value="ogg">OGG</option>
</optgroup>
<optgroup label="文档格式">
<option value="pdf">PDF</option>
<option value="docx">DOCX</option>
<option value="pptx">PPTX</option>
</optgroup>
<optgroup label="表格格式">
<option value="xlsx">XLSX</option>
<option value="csv">CSV</option>
</optgroup>
<optgroup label="PDF处理">
<option value="txt">提取文本 (TXT)</option>
</optgroup>
</select>
</div>
<div class="form-group">
<label for="options">转换选项 (JSON格式，可选):</label>
<input type="text" id="options" name="options" placeholder='{"quality": 90, "width": 800}'>
</div>
<button type="submit">开始转换</button>
</form>
<div id="result" style="margin-top: 20px; display: none;">
<h3>转换结果</h3>
<div id="resultContent"></div>
</div>
</div>
<div style="margin-top: 30px;">
<h2>使用说明</h2>
<p>该服务支持多种文件格式的转换，包括图片、视频、音频、文档、表格和PDF处理。</p>
<p>您也可以通过API直接使用该服务：</p>
<pre>
POST /convert
Content-Type: multipart/form-data
参数:
- file: 文件
- format: 目标格式 (jpg, mp4, pdf等)
- options: 转换选项 (JSON格式)
</pre>
</div>
<script>
document.getElementById('convertForm').addEventListener('submit', async function(e) {
e.preventDefault();
const fileInput = document.getElementById('file');
const format = document.getElementById('format').value;
const options = document.getElementById('options').value;
if (!fileInput.files[0]) {
alert('请选择文件');
return;
}
if (!format) {
alert('请选择目标格式');
return;
}
const formData = new FormData();
formData.append('file', fileInput.files[0]);
formData.append('format', format);
if (options) {
formData.append('options', options);
}
try {
const response = await fetch('/convert', {
method: 'POST',
body: formData
});
if (response.ok) {
// 创建下载链接
const blob = await response.blob();
const url = window.URL.createObjectURL(blob);
const a = document.createElement('a');
a.href = url;
a.download = fileInput.files[0].name.split('.')[0] + '.' + format;
a.textContent = '下载转换后的文件';
a.className = 'button';
a.style.display = 'block';
a.style.marginTop = '10px';
a.style.textDecoration = 'none';
a.style.padding = '10px 15px';
a.style.backgroundColor = '#4CAF50';
a.style.color = 'white';
a.style.borderRadius = '4px';
a.style.textAlign = 'center';
document.getElementById('resultContent').innerHTML = '<p>文件转换成功! 👍</p>';
document.getElementById('resultContent').appendChild(a);
document.getElementById('result').style.display = 'block';
} else {
const error = await response.json();
document.getElementById('resultContent').innerHTML = `<p>转换失败: ${error.error}</p>`;
document.getElementById('result').style.display = 'block';
}
} catch (error) {
document.getElementById('resultContent').innerHTML = `<p>错误: ${error.message}</p>`;
document.getElementById('result').style.display = 'block';
}
});
</script>
</body>
</html>
`);
});
// 启动服务器
app.listen(PORT, () => {
console.log(`Server running on http://localhost:${PORT}`);
console.log(`- 转换服务endpoint: http://localhost:${PORT}/convert`);
console.log(`- 交互式demo页面: http://localhost:${PORT}`);
});