如何在nodejs中将请求文件转换为base64字符串

Question

我有文件进入 request.file 对象。如果我console.log(request.file) 它打印

{
  fieldname: 'file',
  originalname: 'Screenshot from 2021-06-23 18-34-25.png',
  encoding: '7bit',
  mimetype: 'image/png',
  destination: 'public/assets',
  filename: 'file-1628356843810.png',
  path: 'public/assets/file-1628356843810.png',
  size: 620962
}

现在我想将文件转换为 base64 字符串，我做到了

  const encoded = request.file?.buffer.toString("base64")
  console.log(encoded)

它说

TypeError: Cannot read property 'toString' of undefined

Answer 1

const fs = require('fs');
// read binary data of the file
const binaryData = fs.readFileSync(request.file);
// convert binary data to base64 string
const base64String = new Buffer(binaryData).toString('base64');