如何上传流天青媒体服务 [英] How to upload Stream to Azure Media Services

问题描述

我们正在使用ASP.NET MVC 4允许用户通过我们的网站上传的视频和音频。我想用的Azure媒体服务作为后端这一点。

We're using ASP.NET MVC 4 to allow users to upload video and audio through our website. I would like to use Azure Media Service as the back-end for this.

在以下<一个href=\"http://www.windowsazure.com/en-us/develop/Media-Services/how-to-guides/media-services-dotnet/\">Azure's教程，我碰到的问题是，在Azure媒体服务SDK不会出现让上传数据的原始流。相反，只有上传的方法我能找到使用路径字符串参数。

While following Azure's tutorial, the issue I've run into is that the Azure Media Services SDK doesn't appear to allow uploading a raw stream of data. Instead, the only upload method I could find uses a path string argument.

我想避免将文件保存到磁盘（它已经被传输到磁盘默认），并能够流请求的权利，通过Azure的发布文件。

I would like to avoid saving the file to disk (it's already streamed to disk by default), and be able to stream the request posted file right through to Azure.

下面是我的code迄今：

Here is my code thus far:

public void SaveMedia(string fileName, System.IO.Stream stream)
{
    CloudMediaContext mediaCloud = new CloudMediaContext("account", "key");
    AssetCreationOptions assetOptions = new AssetCreationOptions();
    var asset = mediaCloud.Assets.Create(fileName, assetOptions);

    var assetFile = asset.AssetFiles.Create(fileName);

    var accessPolicy = mediaCloud.AccessPolicies.Create(fileName, TimeSpan.FromDays(3), AccessPermissions.Write | AccessPermissions.List);

    var locator = mediaCloud.Locators.CreateLocator(LocatorType.Sas, asset, accessPolicy);

    assetFile.Upload("????????????");

    locator.Delete();
    accessPolicy.Delete();
}

怎样才能做到这一点？将与使用ASP.NET MVC 4的Azure媒体服务的最佳实践为处理上传这个矛盾呢？

How does one accomplish this? Would this conflict with any "best practices" for handling uploads using ASP.NET MVC 4 and Azure Media Services?

推荐答案

您应该使用不使用的Azure媒体服务做上传，它不适合入站流到Azure的存储斑点，这是你所描述的。

You should use not use the Azure Media Services to do the upload, it is not designed for inbound-stream-to-azure-storage-blob, which is what you are describing.

使用了Azure存储SDK直接（使用V1.7，以避免重新绑定的问题）。
存储SDK允许流写入到BLOB。
要做到这一点，你需要先得到一个SAS写入定位器（貌似你在那里），然后使用locator.Path.Segments找到资产的容器。然后使用这个直接在存储SDK使用CloubBlobClient上传 - 它的地方，提供了一种流写入功能

Use the Azure Storage SDK directly (use v1.7 to avoid rebinding issues). The Storage SDK allows stream writes to blob. To do this, you need to first get a SAS write locator (looks like you're there), then use the locator.Path.Segments to find the asset container. Then use this to upload directly using CloubBlobClient in the Storage SDK -- it offers a stream write function somewhere.

请注意在code以上：你没有指定AssetCreationOptions.None，为此它会假设存储中的文件将存储加密（默认传输机制是安全的，没有不安全的）。我不认为你会做之前你的文件流上传的存储加密，所以你最好设置为AssetCreationOptions.None。

Note in your code above: you are not specifying AssetCreationOptions.None, therefor it will assume that the files in storage will be storage-encrypted (default transfer mechanism is secure, not unsecured). I don't think you are going to do the storage encryption on your file-stream prior to upload, so you'd best set that to AssetCreationOptions.None.

就个人而言，我不会走这条路。阅读创建您自己的YouTube我的博客文章：
<一href=\"http://blog-ndrouin.azurewebsites.net/?p=1471\">http://blog-ndrouin.azurewebsites.net/?p=1471

Personally, I would not go this route. Read my blog post on 'create your own youtube': http://blog-ndrouin.azurewebsites.net/?p=1471

在这，还有的使用由服务器端提供的SAS客户端的URL上传的内容的一个完整的示例（其中有您的帐户凭据，你可能不希望漂浮在您的客户端！）。

In it, there is a full example of client-uploaded content using a SAS url provided by the server side (which has your account credentials, that you probably don't want floating around on your client-side!).

客户端，但是，必须是能够做到使用SAS URL的入库。就我而言，我用C＃命令行应用程序。除非你的网页是在同一个域中的对象存储帐户托管，你将不能够做到这一点的HTML5。如果你的网页（或管理上传I帧）不在同一个域中您的存储账户，这将触发在HTML5中的Azure存储REST层，它还不支持CORS一个CORS选项呼吁

The client, however, must be able to do a PUT into storage using that SAS URL. In my case, I used a C# command line app. You will not be able to do this in HTML5 unless your web-page is hosted on the same domain as the target storage account. If your web-page (or an I-Frame that manages the uploads) is not in the same domain as your storage account, this will trigger a CORS "OPTIONS" call in HTML5 to the Azure Storage REST layer, which not yet support CORS.

替代在您的存储账户托管的HTML5 I帧是：Sliverlight的或Flash与您的存储账户的$根跨域文件上传垫片（或者在您的存储账户托管这些插件对象，以避免跨域文件要求）。

Alternatives to an HTML5 I-Frame hosted in your storage account are: Sliverlight or Flash upload shims with a cross-domain file in the $root of your storage account (or perhaps those plugin objects hosted in your storage account to avoid the cross-domain-file request).

我会劝阻上传FILESTREAM在一个POST的服务器。这使你的网络服务，为所有入站文件的瓶颈;和长POST是不是特别稳定。您的应用程序池可以得到回收在上传的中间，你就完了。

I would discourage uploading the filestream to the server in a POST. This makes your web-service a bottleneck for all inbound files; and a long POST is not particularly stable: your app-pool can get recycled in the middle of an upload and you're toast.

PS。我们的团队（Windows Azure的媒体服务），主要是监视该论坛：

PS. Our team (Windows Azure Media Services) primarily monitors this forum:

<一个href=\"http://social.msdn.microsoft.com/Forums/en-US/MediaServices/threads\">http://social.msdn.microsoft.com/Forums/en-US/MediaServices/threads

这篇关于如何上传流天青媒体服务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IT屋！