小编Vak*_*nti的帖子

有人可以解释一下createReadStream和之间的区别吗readablenode.js 之间的区别吗？根据我的观察，它们是相似的，那么它们之间有什么区别，什么时候应该使用它们呢？

例如

const s3 = new AWS.S3({
      accessKeyId: AWSConfig.AWSConfig.ACCESS_KEY_ID,
      secretAccessKey: AWSConfig.AWSConfig.SECRET_ACCESS_KEY,
    });

    const params = {
      Bucket: AWSConfig.AWSConfig.bucket,
      Key: "somebucketName/1620072325205",
    };
    const file = await s3.getObject(params).promise();
    const fileSize = file.ContentLength / (1024 * 1024);

    const read = new Readable({
      read(fileSize) {
        this.push(file.Body);
        this.push(null);
      },
    });

    read.pipe(res);

这类似于

const s3 = new AWS.S3({
      accessKeyId: AWSConfig.AWSConfig.ACCESS_KEY_ID,
      secretAccessKey: AWSConfig.AWSConfig.SECRET_ACCESS_KEY,
    });

    const params = {
      Bucket: AWSConfig.AWSConfig.bucket,
      Key: "somebucketName/1620072325205",
    };
    const file = await s3.getObject(params).createReadStream();
    file.pipe(res)