使用节点 fs 从 aws s3 存储桶读取文件 [英] Read file from aws s3 bucket using node fs

问题描述

我正在尝试使用

fs.readFile(file, function (err, contents) {
  var myLines = contents.Body.toString().split('
')
})

我已经能够使用节点 aws-sdk 下载和上传文件，但我不知道如何简单地读取它并解析内容.

I've been able to download and upload a file using the node aws-sdk, but I am at a loss as to how to simply read it and parse the contents.

以下是我如何从 s3 读取文件的示例:

Here is an example of how I am reading the file from s3:

var s3 = new AWS.S3();
var params = {Bucket: 'myBucket', Key: 'myKey.csv'}
var s3file = s3.getObject(params)

推荐答案

您有几个选择.您可以包含一个回调作为第二个参数，它将使用任何错误消息和对象进行调用.这个 示例 直接来自 AWS 文档:

You have a couple options. You can include a callback as a second argument, which will be invoked with any error message and the object. This example is straight from the AWS documentation:

s3.getObject(params, function(err, data) {
  if (err) console.log(err, err.stack); // an error occurred
  else     console.log(data);           // successful response
});

或者，您可以将输出转换为流.AWS 文档中还有一个 example:

Alternatively, you can convert the output to a stream. There's also an example in the AWS documentation:

var s3 = new AWS.S3({apiVersion: '2006-03-01'});
var params = {Bucket: 'myBucket', Key: 'myImageFile.jpg'};
var file = require('fs').createWriteStream('/path/to/file.jpg');
s3.getObject(params).createReadStream().pipe(file);

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