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| const fs = require('fs');
const base64Data = "data:image/png;base64,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";
const base64Image = base64Data.split(';base64,').pop();
fs.writeFile('image.png', base64Image, { encoding: 'base64' }, function(err) { if (err) { console.error('写入文件失败:', err); } else { console.log('文件写入成功!'); } });
const formData = new FormData(); formData.append('image', fs.createReadStream('image.png'));
console.log('formData',formData)
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