WebUploader 的斷點(diǎn)續(xù)傳功能可以通過以下步驟實(shí)現(xiàn):
webuploader.on('uploadProgress', function(file, percentage) {
// 更新進(jìn)度條等操作
});
var uploader = WebUploader.create({
// ...其他配置項(xiàng)
auto: false, // 關(guān)閉自動上傳
swf: 'Uploader.swf',
server: 'your-server', // 服務(wù)器端上傳地址
pick: '#picker', // 選擇文件的按鈕
accept: {
title: 'Images', // 顯示文本
extensions: 'gif,jpg,jpeg,bmp,png',
mimeTypes: 'image/*'
}
});
uploader.on('fileQueued', function(file) {
// 為文件創(chuàng)建一個唯一的斷點(diǎn)續(xù)傳標(biāo)識
file.uniqueIdentifier = Date.now() + file.name;
});
服務(wù)器端需要能夠識別文件的唯一標(biāo)識,并處理文件的分塊上傳。以下是一個使用 Node.js 和 Express 的示例:
const express = require('express');
const multer = require('multer');
const fs = require('fs');
const path = require('path');
const app = express();
const upload = multer({ dest: 'uploads/' });
app.post('/upload', upload.single('file'), (req, res) => {
const file = req.file;
const uniqueIdentifier = file.uniqueIdentifier;
const startIndex = req.header('X-Start-Index');
const endIndex = req.header('X-End-Index');
// 創(chuàng)建一個臨時文件來存儲斷點(diǎn)續(xù)傳的文件塊
const tempFilePath = path.join('uploads/temp', uniqueIdentifier);
const finalFilePath = path.join('uploads', file.originalname);
// 將文件塊合并為一個完整的文件
let fileContent = Buffer.alloc(0);
for (let i = startIndex; i <= endIndex; i++) {
const chunkFilePath = `${tempFilePath}_${i}`;
const chunkContent = fs.readFileSync(chunkFilePath);
fileContent = Buffer.concat([fileContent, chunkContent]);
fs.unlinkSync(chunkFilePath); // 刪除已處理的文件塊
}
// 將合并后的文件保存到最終目錄
fs.writeFileSync(finalFilePath, fileContent);
res.sendStatus(200);
});
app.listen(3000, () => {
console.log('Server is running on port 3000');
});
uploader.on('uploadBeforeSend', function(file, header) {
// 獲取文件的起始和結(jié)束索引
const startIndex = Math.floor(file.size * (uploadProgress / 100));
const endIndex = Math.floor(file.size);
// 設(shè)置請求頭以發(fā)送斷點(diǎn)續(xù)傳信息
header['X-Start-Index'] = startIndex;
header['X-End-Index'] = endIndex;
});
uploader.on('uploadSuccess', function(file, response) {
console.log('Upload success:', file.name);
});
uploader.on('uploadError', function(file, reason) {
console.log('Upload error:', file.name, reason);
});
通過以上步驟,WebUploader 的斷點(diǎn)續(xù)傳功能可以實(shí)現(xiàn)。請注意,這個示例僅用于演示目的,實(shí)際應(yīng)用中可能需要根據(jù)具體需求進(jìn)行調(diào)整。