2023-05-30 前端通过node获取七牛云的token（token最好还是在后端返回，前端获取token会暴露密钥）

const fs = require('fs');
const qiniu = require('qiniu');

var accessKey = '你的accessKey';
var secretKey = '你的secretKey';

var mac = new qiniu.auth.digest.Mac(accessKey, secretKey);
      
// 获取七牛token
var options = {
  scope: '你的空间名',
  expires: 7200
};
var putPolicy = new qiniu.rs.PutPolicy(options);
var uploadToken = putPolicy.uploadToken(mac);