ServiceHttpModule.cs source code in C# .NET

                        Code:
                         / WCF / WCF / 3.5.30729.1 / untmp / Orcas / SP / ndp / cdf / src / WCF / ServiceModel / System / ServiceModel / Activation / ServiceHttpModule.cs / 1 / ServiceHttpModule.cs
                        
                        
                            //------------------------------------------------------------ 
// Copyright (c) Microsoft Corporation.  All rights reserved.
//-----------------------------------------------------------

namespace System.ServiceModel.Activation 
{
    using System.IO; 
    using System.Text; 
    using System.ServiceModel;
    using System.Web; 
    using System.Web.Hosting;
    using System.Security;
    using System.Security.Permissions;
    using System.Diagnostics; 

    class ServiceHttpModule : IHttpModule 
    { 
        /// 
        /// Critical - Holds pointer to BeginProcessRequest which is SecurityCritical. 
        ///            This callback is called outside the PermitOnly context.
        /// 
        [SecurityCritical]
        static BeginEventHandler beginEventHandler; 

        ///  
        /// Critical - This callback is called outside the PermitOnly context. 
        /// 
        [SecurityCritical] 
        static EndEventHandler endEventHandler;

        static bool disabled;
 

        ///  
        /// RequiresReview - Called outside PermitOnly context, 
        /// 
        [SecurityRequiresReview] 
        public void Dispose()
        {
        }
 
        /// 
        /// Critical - Entry-point from ASP.NET, accesses begin/bndProcessRequest which are SecurityCritical. 
        ///  
        [SecurityCritical]
        public void Init(HttpApplication context) 
        {
            if (ServiceHttpModule.beginEventHandler == null)
            {
                ServiceHttpModule.beginEventHandler = new BeginEventHandler(BeginProcessRequest); 
            }
            if (ServiceHttpModule.endEventHandler == null) 
            { 
                ServiceHttpModule.endEventHandler = new EndEventHandler(EndProcessRequest);
            } 
            context.AddOnPostAuthenticateRequestAsync(
                ServiceHttpModule.beginEventHandler,
                ServiceHttpModule.endEventHandler);
        } 

        ///  
        /// Critical - Entry-point from ASP.NET, called outside PermitOnly context. 
        ///            ASP.NET calls are critical.
        ///            HostedHttpRequestAsyncResult..ctor is critical because it captures HostedImpersonationContext 
        ///            (and makes it available later) so caller must ensure that this is called in the right place.
        /// 
        [SecurityCritical]
        static public IAsyncResult BeginProcessRequest(object sender, EventArgs e, AsyncCallback cb, object extraData) 
        {
            if (ServiceHttpModule.disabled) 
            { 
                return new CompletedAsyncResult(cb, extraData);;
            } 

            try
            {
                ServiceHostingEnvironment.SafeEnsureInitialized(); 
            }
            catch (SecurityException exception) 
            { 
                ServiceHttpModule.disabled = true;
 
                if (DiagnosticUtility.ShouldTraceWarning)
                {
                    DiagnosticUtility.ExceptionUtility.TraceHandledException(exception, TraceEventType.Warning);
                } 

                // If requesting a .svc file, the HttpHandler will try to handle it.  It will call 
                // SafeEnsureInitialized() again, which will fail with the same exception (it is 
                // idempotent on failure).  This is the correct behavior.
                return new CompletedAsyncResult(cb, extraData); 
            }

            if (ServiceHostingEnvironment.AspNetCompatibilityEnabled)
            { 
                return new CompletedAsyncResult(cb, extraData);
            } 
 
            // Check to see whether the extension is supported.
            HttpApplication application = (HttpApplication) sender; 
            string extension = System.IO.Path.GetExtension(application.Request.FilePath);
            if (extension == null || !ServiceHostingEnvironment.GetExtensionSupported(extension))
            {
                return new CompletedAsyncResult(cb, extraData); 
            }
 
            return new HostedHttpRequestAsyncResult(application, false, cb, extraData); 
        }
 
        /// 
        /// RequiresReview - Called outside PermitOnly context,
        /// 
        [SecurityRequiresReview] 
        static public void EndProcessRequest(IAsyncResult ar)
        { 
            if (ar is CompletedAsyncResult) 
            {
                CompletedAsyncResult.End(ar); 
            }
            else
            {
                HostedHttpRequestAsyncResult.End(ar); 
            }
        } 
    } 
}
 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
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ServiceHttpModule.cs source code in C# .NET

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