javascript - NodeJs - 如何将数据 block 转换为新的缓冲区？

Question

在 NodeJS 中，我有来自文件上传的数据 block ，这些数据 block 将文件保存为多个部分。我想通过执行 new Buffer() 来转换它，然后将其上传到 Amazon s3

如果只有一个 block ，那么这会起作用，但是当有多个 block 时，我不知道如何执行 new Buffer()

目前我的解决方案是将数据 block 写入我自己的服务器上的真实文件中，然后将该文件的 PATH 发送到 Amazon s3。

如何跳过文件创建步骤并将缓冲区实际发送到 Amazon s3？

Answer 1

我猜你需要使用streaming-s3

var streamingS3 = require('streaming-s3');
var uploadFile = function (fileReadStream, awsHeader, cb) {

    //set options for the streaming module
    var options = {
        concurrentParts: 2,
        waitTime: 20000,
        retries: 2,
        maxPartSize: 10 * 1024 * 1024
    };
    //call stream function to upload the file to s3
    var uploader = new streamingS3(fileReadStream, aws.accessKey, aws.secretKey, awsHeader, options);
    //start uploading
    uploader.begin();// important if callback not provided.

    // handle these functions
    uploader.on('data', function (bytesRead) {
        console.log(bytesRead, ' bytes read.');
    });

    uploader.on('part', function (number) {
        console.log('Part ', number, ' uploaded.');
    });

    // All parts uploaded, but upload not yet acknowledged.
    uploader.on('uploaded', function (stats) {
        console.log('Upload stats: ', stats);
    });

    uploader.on('finished', function (response, stats) {
        console.log(response);
        cb(null, response);
    });

    uploader.on('error', function (err) {
        console.log('Upload error: ', err);
        cb(err);
    });

};