StackOverflow2013

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PO
primarykey
Id
17531001
data
AcceptedAnswerId
0
AnswerCount
0
ClosedDate
CommentCount
0
CommunityOwnedDate
CreationDate
2013-07-08T15:56:53.330
FavoriteCount
0
LastActivityDate
2015-04-30T18:23:27.830
LastEditDate
2015-04-30T18:23:27.830
LastEditorUserId
1666412
OwnerUserId
1666412
ParentId
16242349
PostTypeId
2
Score
4
ViewCount
0
LastEditorDisplayName
text
Body
OWIN boils down to two things: 1) an "environment" dictionary 2) a method that processes requests and sends responses. For #1, this is just a property bag that gives you access to the request headers, request stream, response headers, response stream and server data. Think of this as your HttpContext for ASP.NET or HttpListenerContext for System.Net.HttpListener. In fact, in more recent builds of Katana (<a href="https://katanaproject.codeplex.com/" rel="nofollow">https://katanaproject.codeplex.com/</a>, which is an open source implementation from the ASP.NET team, there have been improvements (more to come) to simplify this down to an easier to use object model, including an <a href="https://katanaproject.codeplex.com/SourceControl/latest#src/Microsoft.Owin/OwinRequest.cs" rel="nofollow">OwinRequest</a>, <a href="https://katanaproject.codeplex.com/SourceControl/latest#src/Microsoft.Owin/OwinResponse.cs" rel="nofollow">OwinResponse</a>, and <a href="https://katanaproject.codeplex.com/SourceControl/latest#src/Microsoft.Owin/IOwinContext.cs" rel="nofollow">IOwinContext</a>. For #2, this is often called the "AppFunc" and the signature is: <pre><code>using AppFunc = Func<IDictionary<string, object>, Task>; </code></pre> This signature is used for "Middleware" that is in a pipeline of request handlers or it can be the end application which is generating HTML, is a WebAPI, etc. In Katana, there is a class you can inherit from that simplifies this signature to consume the IOwinContext I mentioned previously. Take at look at <a href="https://katanaproject.codeplex.com/SourceControl/latest#src/Microsoft.Owin/OwinMiddleware.cs" rel="nofollow">OwinMiddlware</a> You can also read this article which gives an overview of the Katana/OWIN effort: <a href="http://www.asp.net/aspnet/overview/owin-and-katana/an-overview-of-project-katana" rel="nofollow">http://www.asp.net/aspnet/overview/owin-and-katana/an-overview-of-project-katana</a>
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1. POHow does OWIN work?
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1. USJonCole
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1. USJonCole
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