如何通过 API 从 S3 存储桶下载私有文件

Question

我正在将私有文件从本地主机上传到 Amazon S3。 上传后，如何从前端下载该特定文件。（JavaScript）

Answer 1

你可以试试 s3.getObject

一些可以帮助您的链接： https ://aws.amazon.com/sdk-for-node-js/

示例： https ://github.com/aws/aws-sdk-js/blob/e6671c4340d54010fb7dcf2eaebd679f565bf51b/ts/s3.ts

Answer 2

1. 首先编写（C#）代码将私人文件下载为字符串

    public string DownloadPrivateFileS3(string fileKey) { string accessKey = "YOURVALUE"; string accessSecret = "YOURVALUE";; string bucket = "YOURVALUE";; using (s3Client = new AmazonS3Client(accessKey, accessSecret, "YOURVALUE")) { var folderPath = "AppData/Websites/Cases"; var fileTransferUtility = new TransferUtility(s3Client); Stream stream = fileTransferUtility.OpenStream(bucket, folderPath + "/" + fileKey); using (var memoryStream = new MemoryStream()) { stream.CopyTo(memoryStream); var response = memoryStream.ToArray(); return Convert.ToBase64String(response); } return ""; } }

2. 第二次编写 JQuery 代码以将字符串下载为 Base64

 function downloadPrivateFile() { $.ajax({url: 'DownloadPrivateFileS3?fileName=' + fileName, success: function(result){ var link = this.document.createElement('a'); link.download = fileName; link.href = "data:application/octet-stream;base64," + result; this.document.body.appendChild(link); link.click(); this.document.body.removeChild(link); }}); }

从 HTML/C#/JQuery 的任何位置调用 downloadPrivateFile 方法 -

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