将 zip 从 Blazor WASM 应用程序上传到 AWS-S3 - 遵循教程，没有观察到错误，但存储桶中也没有文件

本文介绍了将 zip 从 Blazor WASM 应用程序上传到 AWS-S3 - 遵循教程，没有观察到错误，但存储桶中也没有文件的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我有一个 Blazor WASM 应用程序(即客户端)，用户可以将一些数据上传到该应用程序.在对数据进行一些完整性和安全性检查后，我想将这些数据上传到 AWS S3 中的 zip 文件中.

目前我已经按如下方式构建了 zip 文件

using (var outStream = new MemoryStream()){使用 (var archive = new ZipArchive(outStream, ZipArchiveMode.Create, true)){foreach(imagelist.Files 中的 var 文件){json_name = file.Name + ".json";var file_in_archive = archive.CreateEntry(file.Name, CompressionLevel.Optimal);使用 (var entryStream = file_in_archive.Open()){file.Data.CopyToAsync(entryStream);}file_in_archive = archive.CreateEntry(json_name, CompressionLevel.Optimal);使用 (var entryStream = file_in_archive.Open()){formMems[file_counter].CopyToAsync(entryStream);}文件计数器 = 文件计数器 + 1；}}Console.WriteLine(完成压缩");uploader.UploadZipFile(outStream, test_title.zip");}

我正在尝试通过这种方法上传 zip 文件 uploader.UploadZipFile - 代码如下

公共类 UploadZip{public BasicAWSCredentials 凭证 = new BasicAWSCredentials("access key", "secret key");public void UploadZipFile(Stream zip_file, string file_name){zip_file.Seek(0, SeekOrigin.Begin);var config = 新的 AmazonS3Config{RegionEndpoint = Amazon.RegionEndpoint.Region};使用 var client = new AmazonS3Client(credentials, config);var uploadRequest = new TransferUtilityUploadRequest{InputStream = zip_file,键 = 文件名，BucketName = "Bucket-Name",CannedACL = S3CannedACL.Private};var fileTransferUtility = new TransferUtility(client);fileTransferUtility.UploadAsync(uploadRequest);Console.WriteLine(完成上传");}}

(上传器是 UploadZip 的一个实例).出于显而易见的原因，我删除了存储桶名称、区域、访问密钥和密钥，但这些都是正确的.

访问密钥和秘密密钥属于我专门为此目的创建的自定义 IAM 用户.政策摘要如下

{版本":2012-10-17"，声明":[{Sid":VisualEditor0"，效果":允许"，动作":s3:PutObject"，资源":arn:aws:s3::::Bucket-Name/*"}]

}

并且 S3 存储桶已Block *all* public access关闭，CORS 如下

[{允许的标题":[*"],允许的方法":[放置"，邮政"],允许的起源":[*"],ExposeHeaders":[]}

]

ACL 授予 Bucket 所有者(您的 AWS 账户)List 和 Write 用于 Objects 和 Read和为存储桶ACL编写，其他3个受赠者没有其他内容.没有桶策略.

我只是不明白为什么这不起作用.当我运行程序时，我看不到任何错误，并且两个 Console.write() 调用运行良好.

编辑

为了回应评论中的建议，我尝试使用 Upload 而不是 UploadAsync 运行代码 - 见下文

公共类 UploadZip{public BasicAWSCredentials 凭证 = new BasicAWSCredentials(AKIAZWFJ7CFNER3WG5EP", EE9eMD/vz8G3Ui3/MZdGDNBY9xv4+/3y0VQAhNzn");public void UploadZipFile(Stream zip_file, string file_name){zip_file.Seek(0, SeekOrigin.Begin);var config = 新的 AmazonS3Config{RegionEndpoint = Amazon.RegionEndpoint.EUWest2};使用 var client = new AmazonS3Client(credentials, config);var uploadRequest = new TransferUtilityUploadRequest{InputStream = zip_file,键 = 文件名，BucketName = "web-pupil-data-store",CannedACL = S3CannedACL.Private};var fileTransferUtility = new TransferUtility(client);fileTransferUtility.Upload(uploadRequest);Console.WriteLine(完成上传");}}

这仍然完成了文件的压缩，但是在打印完成上传之前，它现在抛出一个错误，其中包含大量且非常难以穿透(对我而言)的堆栈跟踪，复制到这里

blazor.webassembly.js:1 暴击:Microsoft.AspNetCore.Components.WebAssembly.Rendering.WebAssemblyRenderer[100]未处理的异常呈现组件:无法在此运行时启动线程.System.NotSupportedException:无法在此运行时启动线程.at (wrapper managed-to-native) System.Threading.Thread.Thread_internal(System.Threading.Thread,System.MulticastDelegate)在 System.Threading.Thread.StartInternal(System.Object 主体，System.Threading.StackCrawlMark& stackMark)<0x47bb958 + 0x00008>在:0在 System.Threading.Thread.Start (System.Threading.StackCrawlMark& stackMark) <0x47bb818 + 0x0004e>在:0在 System.Threading.Thread.Start () 在:0在 Amazon.Runtime.Internal.Util.BackgroundDispatcher`1[T]..ctor (System.Action`1[T] action) [0x0005c] 在 D:\JenkinsWorkspaces\trebuchet-stage-release\AWSDotNetPublic\sdk\src\Core\Amazon.Runtime\Internal\Util\Dispatcher.cs:55在 Amazon.Runtime.Internal.Util.BackgroundInvoker..ctor () [0x00000] 在 D:\JenkinsWorkspaces\trebuchet-stage-release\AWSDotNetPublic\sdk\src\Core\Amazon.Runtime\Internal\Util\Dispatcher.cs:180在 Amazon.Util.AWSSDKUtils.get_Dispatcher () [0x00007] 在 D:\JenkinsWorkspaces\trebuchet-stage-release\AWSDotNetPublic\sdk\src\Core\Amazon.Util\AWSSDKUtils.cs:674在 Amazon.Util.AWSSDKUtils.InvokeInBackground[T] (System.EventHandler`1[TEventArgs] handler, T args, System.Object sender) [0x0004c] 在 D:\JenkinsWorkspaces\trebuchet-stage-release\AWSDotNetPublic\sdk\src\Core\Amazon.Util\AWSSDKUtils.cs:661在 Amazon.Runtime.Internal.StreamReadTracker.ReadProgress (System.Int32 bytesRead) [0x00047] 在 D:\JenkinsWorkspaces\trebuchet-stage-release\AWSDotNetPublic\sdk\src\Core\Amazon.Runtime\Internal\StreamReadTracker.cs:55在 Amazon.Runtime.Internal.Util.EventStream.ReadAsync(System.Byte[] 缓冲区，System.Int32 偏移量，System.Int32 计数，System.Threading.CancellationToken 取消令牌)[0x0009c] 在 D:\JenkinsWorkspaces\trebuchet-stage-release\AWSDotNetPublic\sdk\src\Core\Amazon.Runtime\Internal\Util\EventStream.cs:138在 Amazon.Runtime.Internal.Util.ChunkedUploadWrapperStream.FillInputBufferAsync (System.Threading.CancellationToken cancellingToken) [0x00090] 在 D:\JenkinsWorkspaces\trebuchet-stage-release\AWSDotNetPublic\sdk\src\Core\Amazon.Runtime\Internal\Util\ChunkedUploadWrapperStream.cs:189在 Amazon.Runtime.Internal.Util.ChunkedUploadWrapperStream.ReadAsync(System.Byte[] 缓冲区，System.Int32 偏移量，System.Int32 计数，System.Threading.CancellationToken 取消令牌)[0x00053] 在 D:\JenkinsWorkspaces\trebuchet-stage-release\AWSDotNetPublic\sdk\src\Core\Amazon.Runtime\Internal\Util\ChunkedUploadWrapperStream.cs:163在 System.Threading.Tasks.ValueTask`1[TResult].get_Result() 在:0在 System.IO.Stream.CopyToAsyncInternal(System.IO.Stream 目标，System.Int32 bufferSize，System.Threading.CancellationToken 取消令牌)<0x36ee098 + 0x00134>在:0在 System.Net.Http.HttpContent.LoadIntoBufferAsyncCore (System.Threading.Tasks.Task serializeToStreamTask, System.IO.MemoryStream tempBuffer) <0x49ea648 + 0x00110>在:0在 System.Net.Http.HttpContent.WaitAndReturnAsync[TState,TResult] (System.Threading.Tasks.Task waitTask, TState state, System.Func`2[T,TResult] returnFunc) 在:0在 System.Net.Http.WebAssemblyHttpHandler.doFetch (System.Threading.Tasks.TaskCompletionSource`1[TResult] tcs, System.Net.Http.HttpRequestMessage 请求, System.Threading.CancellationToken 取消令牌) <0x47cfe90 + 0x0038c>在:0在 System.Net.Http.WebAssemblyHttpHandler.SendAsync(System.Net.Http.HttpRequestMessage 请求，System.Threading.CancellationToken 取消令牌)<0x47af880 + 0x00174>在:0在 System.Net.Http.HttpClient.FinishSendAsyncUnbuffered (System.Threading.Tasks.Task`1[TResult] sendTask, System.Net.Http.HttpRequestMessage 请求, System.Threading.CancellationTokenSource cts, System.Boolean disposeCts) 在:0在 D:\JenkinsWorkspaces\trebuchet-stage-release\AWSDotNetPublic\sdk\src\Core\Amazon.Runtime\Pipeline\HttpHandler\_netstandard\HttpRequestMessageFactory 中的 Amazon.Runtime.HttpWebRequestMessage.GetResponseAsync (System.Threading.CancellationToken cancelationToken) [0x0003d].cs:520在 Amazon.Runtime.Internal.HttpHandler`1[TRequestContent].InvokeAsync[T] (Amazon.Runtime.IExecutionContext executionContext) [0x00201] 在 D:\JenkinsWorkspaces\trebuchet-stage-release\AWSDotNetPublic\sdk\src\Core\Amazon.Runtime\Pipeline\HttpHandler\HttpHandler.cs:183在 Amazon.Runtime.Internal.RedirectHandler.InvokeAsync[T] (Amazon.Runtime.IExecutionContext executionContext) [0x00036] 在 D:\JenkinsWorkspaces\trebuchet-stage-release\AWSDotNetPublic\sdk\src\Core\Amazon.Runtime\Pipeline\处理程序\重定向处理程序.cs:59在 Amazon.Runtime.Internal.Uf.printErr @ blazor.webassembly.js:1f.preRun.push.window.Blazor._internal.dotNetCriticalError @ blazor.webassembly.js:1_mono_wasm_invoke_js_unmarshalled @ dotnet.3.2.0.js:1do_call @ 00755c3a:0x10f924do_call_wrapper @ 00755c3a:0x50b6ainterp_exec_method @ 00755c3a:0x2588einterp_runtime_invoke @ 00755c3a:0xf7391mono_jit_runtime_invoke @ 00755c3a:0xddb3ddo_runtime_invoke @ 00755c3a:0x3ba85mono_runtime_try_invoke @ 00755c3a:0xcfdbtry_invoke_perform_wait_callback @ 00755c3a:0xb62e0worker_callback @ 00755c3a:0x9a7a3fire_tp_callback @ 00755c3a:0x105481mono_background_exec @ 00755c3a:0xeb5eeModule._mono_background_exec @ dotnet.3.2.0.js:1pump_message @ dotnet.3.2.0.js:1设置超时(异步)_schedule_background_exec @ dotnet.3.2.0.js:1mono_threads_schedule_background_job @ 00755c3a:0x14dbdves_call_System_Threading_ThreadPool_RequestWorkerThread @ 00755c3a:0xa0025ves_call_System_Threading_ThreadPool_RequestWorkerThread_raw @ 00755c3a:0x9fecfdo_call @ 00755c3a:0x10f790do_call_wrapper @ 00755c3a:0x50b6ainterp_exec_method @ 00755c3a:0x2588einterp_runtime_invoke @ 00755c3a:0xf7391mono_jit_runtime_invoke @ 00755c3a:0xddb3ddo_runtime_invoke @ 00755c3a:0x3ba85mono_runtime_try_invoke @ 00755c3a:0xcfdbmono_runtime_invoke @ 00755c3a:0x44b39mono_wasm_invoke_method @ 00755c3a:0xca6a7Module._mono_wasm_invoke_method @ dotnet.3.2.0.js:1call_method @ dotnet.3.2.0.js:1(匿名)@ dotnet.3.2.0.js:1endInvokeJSFromDotNet @ blazor.webassembly.js:1(匿名)@blazor.webassembly.js:1Promise.then(异步)beginInvokeJSFromDotNet @ blazor.webassembly.js:1_mono_wasm_invoke_js_marshalled @ dotnet.3.2.0.js:1do_call @ 00755c3a:0x10f8b1do_call_wrapper @ 00755c3a:0x50b6ainterp_exec_method @ 00755c3a:0x2588einterp_runtime_invoke @ 00755c3a:0xf7391mono_jit_runtime_invoke @ 00755c3a:0xddb3ddo_runtime_invoke @ 00755c3a:0x3ba85mono_runtime_invoke_checked @ 00755c3a:0x96a2mono_runtime_try_invoke_array @ 00755c3a:0x66c26ves_icall_InternalInvoke @ 00755c3a:0xb44ffves_icall_InternalInvoke_raw @ 00755c3a:0xb3ffddo_call @ 00755c3a:0x10f8b1do_call_wrapper @ 00755c3a:0x50b6ainterp_exec_method @ 00755c3a:0x2588einterp_runtime_invoke @ 00755c3a:0xf7391mono_jit_runtime_invoke @ 00755c3a:0xddb3ddo_runtime_invoke @ 00755c3a:0x3ba85mono_runtime_try_invoke @ 00755c3a:0xcfdbmono_runtime_invoke @ 00755c3a:0x44b39mono_wasm_invoke_method @ 00755c3a:0xca6a7Module._mono_wasm_invoke_method @ dotnet.3.2.0.js:1call_method @ dotnet.3.2.0.js:1(匿名)@ dotnet.3.2.0.js:1beginInvokeDotNetFromJS @ blazor.webassembly.js:1s@blazor.webassembly.js:1e.invokeMethodAsync @ blazor.webassembly.js:1(匿名)@blazor.webassembly.js:1t.dispatchEvent @ blazor.webassembly.js:1(匿名)@blazor.webassembly.js:1(匿名)@blazor.webassembly.js:1e.onGlobalEvent @ blazor.webassembly.js:1

请告知我需要做哪些进一步的测试来确定问题所在，以及如何解决.

编辑和更新

根据以下答案之一，我转而使用 PutObjectRequest.代码如下.这现在给出了一个新错误，我认为这与 S3 存储桶的权限有关.任何人都可以指导我需要更改的内容吗?

代码

公共类 UploadData{private readonly BasicAWSCredentials credentials = new BasicAWSCredentials("access key", "secret Key");公共异步任务 UploadZipFile(Stream zip_file, string file_name){zip_file.Seek(0, SeekOrigin.Begin);var config = 新的 AmazonS3Config{RegionEndpoint = Amazon.RegionEndpoint.EUWest2};使用 var client = new AmazonS3Client(credentials, config);var putRequest1 = 新 PutObjectRequest{BucketName = "Bucket_name",键 = 文件名，输入流 = zip_file};PutObjectResponse response1 = await client.PutObjectAsync(putRequest1);Console.WriteLine(完成上传");}}

这是错误代码

在服务器上遇到未知.消息:'TypeError:无法在'Headers'上执行'append':放置对象时的无效值'

解决方案

我对 blazor 和 webassembly 不太了解，但我可以尝试并给您建议:

上面代码中的问题似乎是 webassembly 中缺乏多线程支持，另见 [1].
aws-sdk-net 中的 TransferUtility 类使用线程进行分段上传，请参阅 [2]:

TransferUtility 提供了一个简单的 API，用于将内容上传到 Amazon S3 和从 Amazon S3 下载内容.它广泛使用 Amazon S3 分段上传来提高吞吐量、性能和可靠性.

通过指定文件路径而不是流上传大文件时，TransferUtility 使用多个线程一次上传单个上传的多个部分.在处理大型内容和高带宽时，这可以显着提高吞吐量.

因此，我会尝试使用一些低级结构来完成使用 PutObjectRequest 的标准上传，请参阅:https://docs.aws.amazon.com/AmazonS3/latest/userguide/upload-objects.html

如果要上传的文件不是太大，这应该可以正常工作，因为它是单线程方法.

另一个问题是在 Blazor WASM 中启用多线程，但我不确定这是否已经是一个选项，请参阅 [3].

[1] https://www.meziantou.net/don-t-freeze-ui-while-executing-cpu-integrated-work-in-blazor-webassembly.htm
[2] https://docs.aws.amazon.com/sdkfornet/v3/apidocs/items/S3/TTransferUtility.html
[3] https://github.com/dotnet/aspnetcore/issues/17730

I have a Blazor WASM app (i.e., client side) that users upload some data to. After some sanity and security checks on the data, I would like to upload these to a zip file in AWS S3.

Currently I have constructed the zip file as follows

using (var outStream = new MemoryStream())
{
    using (var archive = new ZipArchive(outStream, ZipArchiveMode.Create, true))
    {
        foreach (var file in imagelist.Files)
        {
            json_name = file.Name + ".json";
            var file_in_archive = archive.CreateEntry(file.Name, CompressionLevel.Optimal);
            using (var entryStream = file_in_archive.Open())
            {
                file.Data.CopyToAsync(entryStream);
            }
            file_in_archive = archive.CreateEntry(json_name, CompressionLevel.Optimal);
            using (var entryStream = file_in_archive.Open())
            {
                formMems[file_counter].CopyToAsync(entryStream);
            }
            file_counter = file_counter + 1;
        }

    }
    Console.WriteLine("Finished zipping");
    uploader.UploadZipFile(outStream, "test_title.zip");
}

And I am trying to upload the zip file via this method uploader.UploadZipFile - the code is given below

public class UploadZip    
{
    public BasicAWSCredentials credentials = new BasicAWSCredentials("access key", "secret key");
 
    public void UploadZipFile(Stream zip_file, string file_name)
    {
        zip_file.Seek(0, SeekOrigin.Begin);
        var config = new AmazonS3Config
        {
            RegionEndpoint = Amazon.RegionEndpoint.Region
        };
        using var client = new AmazonS3Client(credentials, config);
        var uploadRequest = new TransferUtilityUploadRequest
        {
            InputStream = zip_file,
            Key = file_name,
            BucketName = "Bucket-Name",
            CannedACL = S3CannedACL.Private
        };
        var fileTransferUtility = new TransferUtility(client);
        fileTransferUtility.UploadAsync(uploadRequest);
        Console.WriteLine("finshed uploading");
    }
}

(uploader is an instance of UploadZip). I have removed the bucket name, region, access key and secret key for obvious reasons, but these are correct.

The Access Key and the Secret Key belong to a custom IAM user I made just for this purpose. The Policy summary is given below

{
"Version": "2012-10-17",
"Statement": [
    {
        "Sid": "VisualEditor0",
        "Effect": "Allow",
        "Action": "s3:PutObject",
        "Resource": "arn:aws:s3:::Bucket-Name/*"
    }
]

}

And the S3 bucket has Block *all* public access turned off, the CORS is given below

[
{
    "AllowedHeaders": [
        "*"
    ],
    "AllowedMethods": [
        "PUT",
        "POST"
    ],
    "AllowedOrigins": [
        "*"
    ],
    "ExposeHeaders": []
}

]

The ACL grants the Bucket owner (your AWS account) List and Write for Objects, and Read and Write for Bucket ACL, with nothing else for the other 3 grantees. There is no bucket ploicy.

I simply don't understand why this isn't working. When I run the program I see no errors and the two Console.write() calls run fine.

edit

In response to advice from a comment, I tried running the code with Upload rather than UploadAsync - see below

public class UploadZip    
{
    public BasicAWSCredentials credentials = new BasicAWSCredentials("AKIAZWFJ7CFNER3WG5EP", "EE9eMD/vz8G3Ui3/MZdGDNBY9xv4+/3y0VQAhNzn");
 
    public void UploadZipFile(Stream zip_file, string file_name)
    {
        zip_file.Seek(0, SeekOrigin.Begin);
        var config = new AmazonS3Config
        {
            RegionEndpoint = Amazon.RegionEndpoint.EUWest2
        };
        using var client = new AmazonS3Client(credentials, config);
        var uploadRequest = new TransferUtilityUploadRequest
        {
            InputStream = zip_file,
            Key = file_name,
            BucketName = "web-pupil-data-store",
            CannedACL = S3CannedACL.Private
        };
        var fileTransferUtility = new TransferUtility(client);
        fileTransferUtility.Upload(uploadRequest);
        Console.WriteLine("finshed uploading");
    }
}

This still completes the zipping of the files, but before printing finished uploading, it now throws an error with a large and quite inpenetrable (for me) stack trace, copied here

blazor.webassembly.js:1 crit: Microsoft.AspNetCore.Components.WebAssembly.Rendering.WebAssemblyRenderer[100]
      Unhandled exception rendering component: Cannot start threads on this runtime.
System.NotSupportedException: Cannot start threads on this runtime.
  at (wrapper managed-to-native) System.Threading.Thread.Thread_internal(System.Threading.Thread,System.MulticastDelegate)
  at System.Threading.Thread.StartInternal (System.Object principal, System.Threading.StackCrawlMark& stackMark) <0x47bb958 + 0x00008> in <filename unknown>:0 
  at System.Threading.Thread.Start (System.Threading.StackCrawlMark& stackMark) <0x47bb818 + 0x0004e> in <filename unknown>:0 
  at System.Threading.Thread.Start () <0x47bb6d8 + 0x0000e> in <filename unknown>:0 
  at Amazon.Runtime.Internal.Util.BackgroundDispatcher`1[T]..ctor (System.Action`1[T] action) [0x0005c] in D:\JenkinsWorkspaces\trebuchet-stage-release\AWSDotNetPublic\sdk\src\Core\Amazon.Runtime\Internal\Util\Dispatcher.cs:55 
  at Amazon.Runtime.Internal.Util.BackgroundInvoker..ctor () [0x00000] in D:\JenkinsWorkspaces\trebuchet-stage-release\AWSDotNetPublic\sdk\src\Core\Amazon.Runtime\Internal\Util\Dispatcher.cs:180 
  at Amazon.Util.AWSSDKUtils.get_Dispatcher () [0x00007] in D:\JenkinsWorkspaces\trebuchet-stage-release\AWSDotNetPublic\sdk\src\Core\Amazon.Util\AWSSDKUtils.cs:674 
  at Amazon.Util.AWSSDKUtils.InvokeInBackground[T] (System.EventHandler`1[TEventArgs] handler, T args, System.Object sender) [0x0004c] in D:\JenkinsWorkspaces\trebuchet-stage-release\AWSDotNetPublic\sdk\src\Core\Amazon.Util\AWSSDKUtils.cs:661 
  at Amazon.Runtime.Internal.StreamReadTracker.ReadProgress (System.Int32 bytesRead) [0x00047] in D:\JenkinsWorkspaces\trebuchet-stage-release\AWSDotNetPublic\sdk\src\Core\Amazon.Runtime\Internal\StreamReadTracker.cs:55 
  at Amazon.Runtime.Internal.Util.EventStream.ReadAsync (System.Byte[] buffer, System.Int32 offset, System.Int32 count, System.Threading.CancellationToken cancellationToken) [0x0009c] in D:\JenkinsWorkspaces\trebuchet-stage-release\AWSDotNetPublic\sdk\src\Core\Amazon.Runtime\Internal\Util\EventStream.cs:138 
  at Amazon.Runtime.Internal.Util.ChunkedUploadWrapperStream.FillInputBufferAsync (System.Threading.CancellationToken cancellationToken) [0x00090] in D:\JenkinsWorkspaces\trebuchet-stage-release\AWSDotNetPublic\sdk\src\Core\Amazon.Runtime\Internal\Util\ChunkedUploadWrapperStream.cs:189 
  at Amazon.Runtime.Internal.Util.ChunkedUploadWrapperStream.ReadAsync (System.Byte[] buffer, System.Int32 offset, System.Int32 count, System.Threading.CancellationToken cancellationToken) [0x00053] in D:\JenkinsWorkspaces\trebuchet-stage-release\AWSDotNetPublic\sdk\src\Core\Amazon.Runtime\Internal\Util\ChunkedUploadWrapperStream.cs:163 
  at System.Threading.Tasks.ValueTask`1[TResult].get_Result () <0x370ff80 + 0x00034> in <filename unknown>:0 
  at System.IO.Stream.CopyToAsyncInternal (System.IO.Stream destination, System.Int32 bufferSize, System.Threading.CancellationToken cancellationToken) <0x36ee098 + 0x00134> in <filename unknown>:0 
  at System.Net.Http.HttpContent.LoadIntoBufferAsyncCore (System.Threading.Tasks.Task serializeToStreamTask, System.IO.MemoryStream tempBuffer) <0x49ea648 + 0x00110> in <filename unknown>:0 
  at System.Net.Http.HttpContent.WaitAndReturnAsync[TState,TResult] (System.Threading.Tasks.Task waitTask, TState state, System.Func`2[T,TResult] returnFunc) <0x49eba60 + 0x000c2> in <filename unknown>:0 
  at System.Net.Http.WebAssemblyHttpHandler.doFetch (System.Threading.Tasks.TaskCompletionSource`1[TResult] tcs, System.Net.Http.HttpRequestMessage request, System.Threading.CancellationToken cancellationToken) <0x47cfe90 + 0x0038c> in <filename unknown>:0 
  at System.Net.Http.WebAssemblyHttpHandler.SendAsync (System.Net.Http.HttpRequestMessage request, System.Threading.CancellationToken cancellationToken) <0x47af880 + 0x00174> in <filename unknown>:0 
  at System.Net.Http.HttpClient.FinishSendAsyncUnbuffered (System.Threading.Tasks.Task`1[TResult] sendTask, System.Net.Http.HttpRequestMessage request, System.Threading.CancellationTokenSource cts, System.Boolean disposeCts) <0x49ef528 + 0x00134> in <filename unknown>:0 
  at Amazon.Runtime.HttpWebRequestMessage.GetResponseAsync (System.Threading.CancellationToken cancellationToken) [0x0003d] in D:\JenkinsWorkspaces\trebuchet-stage-release\AWSDotNetPublic\sdk\src\Core\Amazon.Runtime\Pipeline\HttpHandler\_netstandard\HttpRequestMessageFactory.cs:520 
  at Amazon.Runtime.Internal.HttpHandler`1[TRequestContent].InvokeAsync[T] (Amazon.Runtime.IExecutionContext executionContext) [0x00201] in D:\JenkinsWorkspaces\trebuchet-stage-release\AWSDotNetPublic\sdk\src\Core\Amazon.Runtime\Pipeline\HttpHandler\HttpHandler.cs:183 
  at Amazon.Runtime.Internal.RedirectHandler.InvokeAsync[T] (Amazon.Runtime.IExecutionContext executionContext) [0x00036] in D:\JenkinsWorkspaces\trebuchet-stage-release\AWSDotNetPublic\sdk\src\Core\Amazon.Runtime\Pipeline\Handlers\RedirectHandler.cs:59 
  at Amazon.Runtime.Internal.U
f.printErr  @   blazor.webassembly.js:1
f.preRun.push.window.Blazor._internal.dotNetCriticalError   @   blazor.webassembly.js:1
_mono_wasm_invoke_js_unmarshalled   @   dotnet.3.2.0.js:1
do_icall    @   00755c3a:0x10f924
do_icall_wrapper    @   00755c3a:0x50b6a
interp_exec_method  @   00755c3a:0x2588e
interp_runtime_invoke   @   00755c3a:0xf7391
mono_jit_runtime_invoke @   00755c3a:0xddb3d
do_runtime_invoke   @   00755c3a:0x3ba85
mono_runtime_try_invoke @   00755c3a:0xcfdb
try_invoke_perform_wait_callback    @   00755c3a:0xb62e0
worker_callback @   00755c3a:0x9a7a3
fire_tp_callback    @   00755c3a:0x105481
mono_background_exec    @   00755c3a:0xeb5ee
Module._mono_background_exec    @   dotnet.3.2.0.js:1
pump_message    @   dotnet.3.2.0.js:1
setTimeout (async)      
_schedule_background_exec   @   dotnet.3.2.0.js:1
mono_threads_schedule_background_job    @   00755c3a:0x14dbd
ves_icall_System_Threading_ThreadPool_RequestWorkerThread   @   00755c3a:0xa0025
ves_icall_System_Threading_ThreadPool_RequestWorkerThread_raw   @   00755c3a:0x9fecf
do_icall    @   00755c3a:0x10f790
do_icall_wrapper    @   00755c3a:0x50b6a
interp_exec_method  @   00755c3a:0x2588e
interp_runtime_invoke   @   00755c3a:0xf7391
mono_jit_runtime_invoke @   00755c3a:0xddb3d
do_runtime_invoke   @   00755c3a:0x3ba85
mono_runtime_try_invoke @   00755c3a:0xcfdb
mono_runtime_invoke @   00755c3a:0x44b39
mono_wasm_invoke_method @   00755c3a:0xca6a7
Module._mono_wasm_invoke_method @   dotnet.3.2.0.js:1
call_method @   dotnet.3.2.0.js:1
(anonymous) @   dotnet.3.2.0.js:1
endInvokeJSFromDotNet   @   blazor.webassembly.js:1
(anonymous) @   blazor.webassembly.js:1
Promise.then (async)        
beginInvokeJSFromDotNet @   blazor.webassembly.js:1
_mono_wasm_invoke_js_marshalled @   dotnet.3.2.0.js:1
do_icall    @   00755c3a:0x10f8b1
do_icall_wrapper    @   00755c3a:0x50b6a
interp_exec_method  @   00755c3a:0x2588e
interp_runtime_invoke   @   00755c3a:0xf7391
mono_jit_runtime_invoke @   00755c3a:0xddb3d
do_runtime_invoke   @   00755c3a:0x3ba85
mono_runtime_invoke_checked @   00755c3a:0x96a2
mono_runtime_try_invoke_array   @   00755c3a:0x66c26
ves_icall_InternalInvoke    @   00755c3a:0xb44ff
ves_icall_InternalInvoke_raw    @   00755c3a:0xb3ffd
do_icall    @   00755c3a:0x10f8b1
do_icall_wrapper    @   00755c3a:0x50b6a
interp_exec_method  @   00755c3a:0x2588e
interp_runtime_invoke   @   00755c3a:0xf7391
mono_jit_runtime_invoke @   00755c3a:0xddb3d
do_runtime_invoke   @   00755c3a:0x3ba85
mono_runtime_try_invoke @   00755c3a:0xcfdb
mono_runtime_invoke @   00755c3a:0x44b39
mono_wasm_invoke_method @   00755c3a:0xca6a7
Module._mono_wasm_invoke_method @   dotnet.3.2.0.js:1
call_method @   dotnet.3.2.0.js:1
(anonymous) @   dotnet.3.2.0.js:1
beginInvokeDotNetFromJS @   blazor.webassembly.js:1
s   @   blazor.webassembly.js:1
e.invokeMethodAsync @   blazor.webassembly.js:1
(anonymous) @   blazor.webassembly.js:1
t.dispatchEvent @   blazor.webassembly.js:1
(anonymous) @   blazor.webassembly.js:1
(anonymous) @   blazor.webassembly.js:1
e.onGlobalEvent @   blazor.webassembly.js:1

Please advise on what further tests I need to do to determine what the problem is, and how I can fix.

Edit and update

Following from one of the answers below, I switched to using a PutObjectRequest. The code is below. This now gives a new error, which I assume is to do with the permissions of the S3 bucket. Can anyone guide on what I need to change?

Code

public class UploadData
{
    private readonly BasicAWSCredentials credentials = new BasicAWSCredentials("access key", "secret Key");

    public async Task UploadZipFile(Stream zip_file, string file_name)
    {
        zip_file.Seek(0, SeekOrigin.Begin);
        var config = new AmazonS3Config
        {
            RegionEndpoint = Amazon.RegionEndpoint.EUWest2
        };
        using var client = new AmazonS3Client(credentials, config);

        var putRequest1 = new PutObjectRequest
        {
            BucketName = "Bucket_name",
            Key = file_name,
            InputStream = zip_file
        };
        PutObjectResponse response1 = await client.PutObjectAsync(putRequest1);

        Console.WriteLine("finshed uploading");
    }
}

And here is the error code

Unknown encountered on server. Message:'TypeError: Failed to execute 'append' on 'Headers': Invalid value' when putting an object

解决方案

I do not know much about blazor and webassembly in particular, but I can give try and give you an advice what I would try:

It looks like the issue in the code above is a lack of multithreading support in webassembly, see also [1].
The TransferUtility class in the aws-sdk-net makes use of threads for multipart uploads, see [2]:

Thus, I would try to use some of the low-level constructs to accomplish a standard upload using PutObjectRequest, see: https://docs.aws.amazon.com/AmazonS3/latest/userguide/upload-objects.html

If the files to be uploaded are not too large, this should work without any issues because it is a single-threaded approach.

Another issue would be to enable multi-threading in Blazor WASM, but I am not sure if that is already an option, see [3].

[1] https://www.meziantou.net/don-t-freeze-ui-while-executing-cpu-intensive-work-in-blazor-webassembly.htm
[2] https://docs.aws.amazon.com/sdkfornet/v3/apidocs/items/S3/TTransferUtility.html
[3] https://github.com/dotnet/aspnetcore/issues/17730

这篇关于将 zip 从 Blazor WASM 应用程序上传到 AWS-S3 - 遵循教程，没有观察到错误，但存储桶中也没有文件的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！