前端接受zip文件流并下载
时间: 2024-10-25 19:12:45 浏览: 49
前端接收ZIP文件流并下载通常涉及到HTML5的File API和服务器提供的文件流。以下是步骤概述:
1. **HTML部分**:
使用`<input type="file">`元素让用户选择ZIP文件,然后监听`change`事件处理函数,获取用户选择的文件。
```html
<input id="upload-zip" type="file" accept=".zip" (change)="handleZipSelect($event)">
<button (click)="downloadZip()">下载</button>
```
2. **JavaScript部分**:
使用JavaScript的FileReader API读取文件内容,然后转换成Blob对象(浏览器原生支持的数据块),接着创建一个新的a标签用于触发下载。
```typescript
handleZipSelect(event) {
const file = event.target.files[0];
if (!file || !file.type.startsWith('application/zip')) return;
const reader = new FileReader();
reader.onloadend = () => {
const zipBlob = reader.result;
this.downloadZip(zipBlob);
};
reader.readAsArrayBuffer(file);
}
downloadZip(zipBlob) {
const url = URL.createObjectURL(zipBlob);
const aLink = document.createElement('a');
aLink.href = url;
aLink.download = 'archive.zip'; // 下载名称
aLink.click();
setTimeout(() => {
URL.revokeObjectURL(url); // 下载完成后释放URL
}, 0);
}
```
3. **服务器端**:
如果文件非常大,你可能需要在服务器上处理并将文件作为HTTP响应的一部分提供。可以考虑使用流式API或Content-Disposition头来指示它是一个文件流。
```javascript (server-side - Node.js示例 with Multer):
const express = require('express');
const multer = require('multer');
const app = express();
app.use(multer({ dest: 'uploads/' }).single('zipFile'));
app.get('/download', (req, res) => {
const filePath = req.file.path; // 获取存储路径
res.download(filePath, 'archive.zip'); // 设置下载名称
});
app.listen(3000, () => console.log('Server running on port 3000'));
```
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