NodeJs-如何将数据块转换为新的Buffer？

Question

在NodeJS中，我有来自文件上传的大量数据，这些数据部分地保存了文件。 我想通过执行新的Buffer（）进行转换，然后将其上传到Amazon s3

如果只有一个块，这会起作用，但是当有多个块时，我不知道如何做新的Buffer（）

当前，我的解决方案是将数据块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，然后实际将缓冲区发送给Amazon s3？

Answer 1

我想你需要使用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);
    });

};