asereware / OwinRequestScopeContext

Owin Middleware it is possible to RequestScopeContext like HttpContext.Current but no dependent System.Web.

OwinRequestScopeContext

Owin Middleware it is possible to RequestScopeContext like HttpContext.Current but no dependent System.Web.

Install

using with NuGet, OwinRequestScopeContext

PM> Install-Package OwinRequestScopeContext

Usage

// using Owin; you can use UseRequestScopeContext extension method.
// enabled timing is according to Pipeline.
// so I recommend enable as far in advance as possible.
app.UseRequestScopeContext();

app.UseErrorPage();
app.Run(async _ =>
{
    // get global context like HttpContext.Current.
    var context = OwinRequestScopeContext.Current;

    // Environment is raw Owin Environment as IDictionary<string, object>.
    var __ = context.Environment;

    // optional:If you want to change Microsoft.Owin.OwinContext, you can wrap.
    new Microsoft.Owin.OwinContext(context.Environment);

    // Timestamp is request started(correctly called RequestScopeContextMiddleware timing).
    var ___ = context.Timestamp;

    // Items is IDictionary<string, object> like HttpContext.Items.
    // Items is threadsafe(as ConcurrentDictionary) by default.
    var ____ = context.Items;

    // DisposeOnPipelineCompleted can register dispose when request completed(correctly RequestScopeContextMiddleware underling Middlewares finished)
    // return value is cancelToken. If call token.Dispose() then canceled register.
    var cancelToken = context.DisposeOnPipelineCompleted(new TraceDisposable());

    // OwinRequestScopeContext over async/await also ConfigureAwait(false)
    context.Items["test"] = "foo";
    await Task.Delay(TimeSpan.FromSeconds(1)).ConfigureAwait(false);
    var _____ = OwinRequestScopeContext.Current.Items["test"]; // foo

    await Task.Run(() =>
    {
        // OwinRequestScopeContext over new thread/threadpool.
        var ______ = OwinRequestScopeContext.Current.Items["test"]; // foo
    });

    _.Response.ContentType = "text/plain";
    await _.Response.WriteAsync("Hello OwinRequestScopeContext! => ");
    await _.Response.WriteAsync(OwinRequestScopeContext.Current.Items["test"] as string); // render foo
});

Full code is avaliable on this Repositry, OwinRequestScopeContext.Sample.SelfHost.

History

2013-12-01 ver 1.0.1

• fix DisposeOnPipelineCompleted is not work.
• improved DisposeOnPipelineCompleted queue is threadsafe when isThreadSafe is true.
• Add Sample.IIS(run on System.Web)

2013-12-01 ver 1.0.0

• first release.

License

under MIT License