js一次下载多个文件上传

async function downloadFiles(fileUrls) {
    const files = [];
    for (const url of fileUrls) {
        const response = await fetch(url);
        const blob = await response.blob();
        files.push(blob);
    }
    return files;
}

async function uploadFiles(files) {
    const formData = new FormData();
    files.forEach((file, index) => {
        formData.append(`file${index}`, file);
    });

    const response = await fetch('/upload', {
        method: 'POST',
        body: formData
    });

    if (response.ok) {
        console.log('Files uploaded successfully');
    } else {
        console.error('Failed to upload files');
    }
}

async function downloadAndUpload(fileUrls) {
    try {
        const files = await downloadFiles(fileUrls);
        await uploadFiles(files);
    } catch (error) {
        console.error('Error:', error);
    }
}

// 示例使用
const fileUrls = [
    'https://example.com/file1.jpg',
    'https://example.com/file2.jpg',
    'https://example.com/file3.jpg'
];

downloadAndUpload(fileUrls);

async function downloadAndUploadInBatches(fileUrls, batchSize = 5) {
    for (let i = 0; i < fileUrls.length; i += batchSize) {
        const batch = fileUrls.slice(i, i + batchSize);
        const files = await downloadFiles(batch);
        await uploadFiles(files);
    }
}

downloadAndUploadInBatches(fileUrls);