Question

我正在将一个私有文件从localhost上传到Amazon S3。上传后，如何从前端下载该特定文件。（JavaScript）

Answer 1

您可以尝试s3.getObject

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

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

Answer 2

首先编写(C#)代码以字符串形式下载私有文件

 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 "";
    }
}

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 的任何地方调用 downloadPrivateFile 方法 -

享受快乐的编码和复杂问题的解决

如何通过API从S3存储桶下载私有文件

2 个答案: