WebServiceHandlerFactory.cs source code in C# .NET

                        Code:
                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / Services / Web / System / Web / Services / Protocols / WebServiceHandlerFactory.cs / 1305376 / WebServiceHandlerFactory.cs
                        
                        
                            //------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
//----------------------------------------------------------------------------- 

namespace System.Web.Services.Protocols { 
 
    using System.Diagnostics;
    using System; 
    using System.Web;
    using Microsoft.Win32;
    //using System.Reflection;
    using System.Web.UI; 
    using System.ComponentModel; // for CompModSwitches
    using System.IO; 
    using System.Web.Services.Configuration; 
    using System.Security.Permissions;
    using System.Threading; 
    using System.Web.Services.Diagnostics;

    /// 
    ///  
    ///    [To be supplied.]
    ///  
    [PermissionSet(SecurityAction.InheritanceDemand, Name = "FullTrust")] 
    public class WebServiceHandlerFactory : IHttpHandlerFactory {
        /* 
        static WebServiceHandlerFactory() {
            Stream stream = new FileStream("c:\\out.txt", FileMode.OpenOrCreate, FileAccess.Write, FileShare.ReadWrite); //(FileMode.OpenOrCreate);
            TraceListener listener = new TextWriterTraceListener(stream);
            Debug.AutoFlush = true; 
            Debug.Listeners.Add(listener);
            Debug.WriteLine("--------------"); 
        } 
        */
 
#if DEBUG
        void DumpRequest(HttpContext context) {
            HttpRequest request = context.Request;
            Debug.WriteLine("Process Request called."); 
            Debug.WriteLine("Path = " + request.Path);
            Debug.WriteLine("PhysicalPath = " + request.PhysicalPath); 
            Debug.WriteLine("Query = " + request.Url.Query); 
            Debug.WriteLine("HttpMethod = " + request.HttpMethod);
            Debug.WriteLine("ContentType = " + request.ContentType); 
            Debug.WriteLine("PathInfo = " + request.PathInfo);
            Debug.WriteLine("----Http request headers: ----");
            System.Collections.Specialized.NameValueCollection headers = request.Headers;
            foreach (string name in headers) { 
                string value = headers[name];
                if (value != null && value.Length > 0) 
                    Debug.WriteLine(name + "=" + headers[name]); 
            }
        } 
#endif


        ///  
        /// 
        ///    [To be supplied.] 
        ///  
        public IHttpHandler GetHandler(HttpContext context, string verb, string url, string filePath) {
            TraceMethod method = Tracing.On ? new TraceMethod(this, "GetHandler") : null; 
            if (Tracing.On) Tracing.Enter("IHttpHandlerFactory.GetHandler", method, Tracing.Details(context.Request));

            new AspNetHostingPermission(AspNetHostingPermissionLevel.Minimal).Demand();
            //if (CompModSwitches.Remote.TraceVerbose) DumpRequest(context); 
            //System.Diagnostics.Debugger.Break();
#if DEBUG 
            if (CompModSwitches.Remote.TraceVerbose) DumpRequest(context); 
#endif
 
            Type type = GetCompiledType(url, context);
            IHttpHandler handler = CoreGetHandler(type, context, context.Request, context.Response);

            if (Tracing.On) Tracing.Exit("IHttpHandlerFactory.GetHandler", method); 

            return handler; 
        } 

        // Asserts security permission. 
        // Reason: System.Web.UI.WebServiceParser.GetCompiledType() demands SecurityPermission.
        // Justification: The type returned is only used to get the IHttpHandler.
        [SecurityPermission(SecurityAction.Assert, Unrestricted = true)]
        private Type GetCompiledType(string url, HttpContext context) 
        {
            return WebServiceParser.GetCompiledType(url, context); 
        } 

        internal IHttpHandler CoreGetHandler(Type type, HttpContext context, HttpRequest request, HttpResponse response) { 
            TraceMethod caller = Tracing.On ? new TraceMethod(this, "CoreGetHandler") : null;
            ServerProtocolFactory[] protocolFactories = GetServerProtocolFactories();
            ServerProtocol protocol = null;
            bool abort = false; 
            for (int i = 0; i < protocolFactories.Length; i++) {
                try { 
                    protocol = protocolFactories[i].Create(type, context, request, response, out abort); 
                    if ((protocol != null && protocol.GetType() != typeof(UnsupportedRequestProtocol)) || abort)
                        break; 
                }
                catch (Exception e) {
                    if (e is ThreadAbortException || e is StackOverflowException || e is OutOfMemoryException) {
                        throw; 
                    }
                    throw Tracing.ExceptionThrow(caller, new InvalidOperationException(Res.GetString(Res.FailedToHandleRequest0), e)); 
                } 
            }
 
            if (abort)
                return new NopHandler();

            if (protocol == null) { 
                if (request.PathInfo != null && request.PathInfo.Length != 0) {
                    throw Tracing.ExceptionThrow(caller, new InvalidOperationException(Res.GetString(Res.WebUnrecognizedRequestFormatUrl, 
                        new object[] { request.PathInfo }))); 
                }
                else { 
                    throw Tracing.ExceptionThrow(caller, new InvalidOperationException(Res.GetString(Res.WebUnrecognizedRequestFormat)));
                }
            }
            else if (protocol is UnsupportedRequestProtocol) { 
                throw Tracing.ExceptionThrow(caller, new HttpException(((UnsupportedRequestProtocol)protocol).HttpCode, Res.GetString(Res.WebUnrecognizedRequestFormat)));
            } 
 
            bool isAsync = protocol.MethodInfo.IsAsync;
            bool requiresSession = protocol.MethodAttribute.EnableSession; 

            if (isAsync) {
                if (requiresSession) {
                    return new AsyncSessionHandler(protocol); 
                }
                else { 
                    return new AsyncSessionlessHandler(protocol); 
                }
            } 
            else {
                if (requiresSession) {
                    return new SyncSessionHandler(protocol);
                } 
                else {
                    return new SyncSessionlessHandler(protocol); 
                } 
            }
        } 

        // Asserts FullTrust permission.
        // Justification: FullTrust is used only to create the objects of type SoapServerProtocolFactory and for nothing else.
        [PermissionSet(SecurityAction.Assert, Name = "FullTrust")] 
        private ServerProtocolFactory[] GetServerProtocolFactories()
        { 
            return WebServicesSection.Current.ServerProtocolFactories; 
        }
 
        /// 
        /// 
        ///    [To be supplied.]
        ///  
        public void ReleaseHandler(IHttpHandler handler) {
        } 
    } 

    internal class UnsupportedRequestProtocol : ServerProtocol { 
        int httpCode;

        internal UnsupportedRequestProtocol(int httpCode) {
            this.httpCode = httpCode; 
        }
        internal int HttpCode { get { return httpCode; } } 
 
        internal override bool Initialize() { return true; }
 
        internal override bool IsOneWay {
            get { return false; }
        }
 
        internal override LogicalMethodInfo MethodInfo {
            get { return null; } 
        } 

        internal override ServerType ServerType { 
            get { return null; }
        }

        internal override object[] ReadParameters() { 
            return new object[0];
        } 
        internal override void WriteReturns(object[] returnValues, Stream outputStream) { } 
        internal override bool WriteException(Exception e, Stream outputStream) { return false; }
    } 

    internal class NopHandler : IHttpHandler {

        ///  
        /// 
        ///      IHttpHandler.IsReusable. 
        ///  
        public bool IsReusable {
            get { return false; } 
        }

        /// 
        ///  
        ///      IHttpHandler.ProcessRequest.
        ///  
        public void ProcessRequest(HttpContext context) { 
        }
 
    }
}


// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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WebServiceHandlerFactory.cs source code in C# .NET

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