cos.putObject({
    Bucket: 'examplebucket-1250000000', /* Required */
    Region: 'COS_REGION',     /* Bucket region. Required */
    Key: 'exampleobject', /* Required */
    StorageClass: 'STANDARD',
    Body: fileObject, // Upload the file object.
    onProgress: function(progressData) {
        console.log(JSON.stringify(progressData));
    }
}, function(err, data) {
    if (err) {
      console.log(err);
    } else {
      // You need to add `x-cos-hash-crc64ecma` to Expose-Headers for a successful response.
      // Documentation: https://www.tencentcloud.com/document/product/436/13318?from_cn_redirect=1
      var crc64 = data.headers['x-cos-hash-crc64ecma'];
      console.log(crc64);
    }
});