如何通过 API 从 S3 存储桶下载私有文件

Question

I am uploading a private file from localhost to Amazon S3. After uploading, how to download that particular file from front end.(JavaScript)

Answer 1

You can try s3.getObject

some links that can help You: https://aws.amazon.com/sdk-for-node-js/

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

Answer 2

1. Firstly write(C#) code to download private file as string

    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. Second Write JQuery Code to download string as 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); }}); }

Call downloadPrivateFile method from anywhere of HTML/C#/JQuery -

Enjoy Happy Coding and Solutions of Complex Problems