从 Http 上传 AWS .NET SDK 多部分文件答案

【问题标题】：AWS .NET SDK Multipart File Upload from Http从 Http 上传 AWS .NET SDK 多部分文件
【发布时间】：2011-12-20 05:27:16
【问题描述】：

我已经实现了一个 .ashx 处理程序，它从客户端接收文件的分块上传部分。以前，我首先将文件存储在临时文件夹中，然后再将它们上传到 AWS。由于文件变得相当大，我想跳过临时文件夹部分并使用 MultiPart 请求将它们直接上传到 AWS。

到目前为止看起来还不错，但我找不到接受 HttpPostedFile 或 Stream 进行上传的重载..

我可能会出现以下情况？

        // Create request to upload a part.
        UploadPartRequest uploadRequest = new UploadPartRequest()
            .WithBucketName(myBucket)
            .WithKey(myKey)
            .WithUploadId(myUploadId)                
            .WithPartNumber(partNumber)
            .WithInputStream(inputStream);

【问题讨论】：

标签： c# amazon-s3

【解决方案1】：

UploadPartRequest uploadRequest = new UploadPartRequest()
        .WithBucketName(myBucket)
        .WithKey(myKey)
        .WithUploadId(myUploadId)                
        .WithPartNumber(partNumber)
        .WithInputStream(stream) as UploadPartRequest;

这也是可能的。

【讨论】：

【解决方案2】：

WithInputStream 将返回 s3 请求而不是 UploadPartRequest 所以只需将返回类型转换为 UploadPartRequest

// Create request to upload a part.
        UploadPartRequest uploadRequest = new UploadPartRequest()
            .WithBucketName(myBucket)
            .WithKey(myKey)
            .WithUploadId(myUploadId)                
            .WithPartNumber(partNumber);

uploadRequest = (UploadPartRequest)uploadRequest.WithInputStream(ftiObject.sourceStream);

这对我有用

【讨论】：

【解决方案3】：

简单：只需通过属性设置输入流：

            // Create request to upload a part.
            UploadPartRequest uploadRequest = new UploadPartRequest()
                .WithBucketName(myBucket)
                .WithKey(myKey)
                .WithUploadId(UploadId)
                .WithPartNumber(PartNumber)
                .WithPartSize(inputStream.Length)
                .WithFilePosition(FilePosition);

            uploadRequest.InputStream = inputStream;

【讨论】：