ServerProtocol.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 / ServerProtocol.cs / 1305376 / ServerProtocol.cs
                        
                        
                            //------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
//----------------------------------------------------------------------------- 

namespace System.Web.Services.Protocols { 
    using System; 
    using System.Diagnostics;
    using System.Collections; 
    using System.IO;
    using System.Reflection;
    using System.Xml.Serialization;
    using System.Web.Services.Description; 
    using System.Web.Caching;
    using System.ComponentModel; 
    using System.Text; 
    using System.Net;
    using System.Web.Services; 
    using System.Web.Hosting;
    using System.Threading;
    using System.Security.Permissions;
    using System.Web.Services.Diagnostics; 

    [PermissionSet(SecurityAction.InheritanceDemand, Name = "FullTrust")] 
    [PermissionSet(SecurityAction.LinkDemand, Name = "FullTrust")] 
    public abstract class ServerProtocol {
        Type type; 
        HttpRequest request;
        HttpResponse response;
        HttpContext context;
        object target; 
        WebMethodAttribute methodAttr;
 
        private static Object s_InternalSyncObject; 
        internal static Object InternalSyncObject {
            get { 
                if (s_InternalSyncObject == null) {
                    Object o = new Object();
                    Interlocked.CompareExchange(ref s_InternalSyncObject, o, null);
                } 
                return s_InternalSyncObject;
            } 
        } 

        internal void SetContext(Type type, HttpContext context, HttpRequest request, HttpResponse response) { 
            this.type = type;
            this.context = context;
            this.request = request;
            this.response = response; 
            Initialize();
        } 
 
        internal virtual void CreateServerInstance() {
            target = Activator.CreateInstance(ServerType.Type); 
            WebService service = target as WebService;
            if (service != null)
                service.SetContext(context);
        } 

        internal virtual void DisposeServerInstance() { 
            if (target == null) return; 
            IDisposable disposable = target as IDisposable;
            if (disposable != null) 
                disposable.Dispose();
            target = null;
        }
 
        protected internal HttpContext Context {
            get { return context; } 
        } 

        protected internal HttpRequest Request { 
            get { return request; }
        }

        protected internal HttpResponse Response { 
            get { return response; }
        } 
 
        internal Type Type {
            get { return type; } 
        }

        protected virtual internal object Target {
            get { return target; } 
        }
 
        internal virtual bool WriteException(Exception e, Stream outputStream) { 
            // return true if exception should not be re-thrown to ASP.NET
            return false; 
        }

        internal abstract bool Initialize();
        internal abstract object[] ReadParameters(); 
        internal abstract void WriteReturns(object[] returns, Stream outputStream);
        internal abstract LogicalMethodInfo MethodInfo { get;} 
        internal abstract ServerType ServerType { get;} 
        internal abstract bool IsOneWay { get;}
        internal virtual Exception OnewayInitException { get {return null;}} 

        internal WebMethodAttribute MethodAttribute {
            get {
                if (methodAttr == null) 
                    methodAttr = MethodInfo.MethodAttribute;
                return methodAttr; 
            } 
        }
 
        internal string GenerateFaultString(Exception e) {
            return GenerateFaultString(e, false);
        }
 
        internal static void SetHttpResponseStatusCode(HttpResponse httpResponse, int statusCode)
        { 
            // We skip IIS custom errors for HTTP requests. 
            httpResponse.TrySkipIisCustomErrors = true;
            httpResponse.StatusCode = statusCode; 
        }

        //
 
        internal string GenerateFaultString(Exception e, bool htmlEscapeMessage) {
            bool isDevelopmentServer = Context != null && !Context.IsCustomErrorEnabled; 
            if (isDevelopmentServer && !htmlEscapeMessage) { 
                //If the user has specified it's a development server (versus a production server) in ASP.NET config,
                //then we should just return e.ToString instead of extracting the list of messages. 
                return e.ToString();
            }
            StringBuilder builder = new StringBuilder();
            if (isDevelopmentServer) { 
                //  we are dumping the ecseption directly to IE, need to encode
                GenerateFaultString(e, builder); 
            } 
            else {
                for (Exception inner = e; inner != null; inner = inner.InnerException) { 
                    string text = htmlEscapeMessage ? HttpUtility.HtmlEncode(inner.Message) : inner.Message;
                    if (text.Length == 0) text = e.GetType().Name;
                    builder.Append(text);
                    if (inner.InnerException != null) builder.Append(" ---> "); 
                }
            } 
            return builder.ToString(); 
        }
 
        static void GenerateFaultString(Exception e, StringBuilder builder) {
            builder.Append(e.GetType().FullName);
            if (e.Message != null && e.Message.Length > 0) {
                builder.Append(": "); 
                builder.Append(HttpUtility.HtmlEncode(e.Message));
            } 
            if (e.InnerException != null) { 
                builder.Append(" ---> ");
                GenerateFaultString(e.InnerException, builder); 
                builder.Append(Environment.NewLine);
                builder.Append("   ");
                builder.Append(Res.GetString(Res.StackTraceEnd));
            } 
            if (e.StackTrace != null) {
                builder.Append(Environment.NewLine); 
                builder.Append(e.StackTrace); 
            }
        } 

        internal void WriteOneWayResponse() {
            context.Response.ContentType = null;
            Response.StatusCode = (int) HttpStatusCode.Accepted; 
        }
 
 
        string CreateKey(Type protocolType, Type serverType) {
            // 
            // we want to use the hostname to cache since for documentation, WSDL
            // contains the cache hostname, but we definitely don't want to cache the query string!
            //
            string protocolTypeName = protocolType.FullName; 
            string serverTypeName = serverType.FullName;
            string typeHandleString = serverType.TypeHandle.Value.ToString(); 
            string url = Request.Url.GetLeftPart(UriPartial.Path); 
            int length = protocolTypeName.Length + url.Length + serverTypeName.Length + typeHandleString.Length;
            StringBuilder sb = new StringBuilder(length); 
            sb.Append(protocolTypeName);
            sb.Append(url);
            sb.Append(serverTypeName);
            sb.Append(typeHandleString); 
            return sb.ToString();
        } 
 
        protected void AddToCache(Type protocolType, Type serverType, object value) {
            HttpRuntime.Cache.Insert(CreateKey(protocolType, serverType), 
                value,
                null,
                Cache.NoAbsoluteExpiration,
                Cache.NoSlidingExpiration, 
                CacheItemPriority.NotRemovable,
                null); 
        } 

        protected object GetFromCache(Type protocolType, Type serverType) { 
            return HttpRuntime.Cache.Get(CreateKey(protocolType, serverType));
        }
    }
 
    [PermissionSet(SecurityAction.InheritanceDemand, Name = "FullTrust")]
    [PermissionSet(SecurityAction.LinkDemand, Name = "FullTrust")] 
    public abstract class ServerProtocolFactory { 
        internal ServerProtocol Create(Type type, HttpContext context, HttpRequest request, HttpResponse response, out bool abortProcessing) {
            ServerProtocol serverProtocol = null; 
            abortProcessing = false;
            serverProtocol = CreateIfRequestCompatible(request);
            try {
                if (serverProtocol!=null) 
                    serverProtocol.SetContext(type, context, request, response);
                return serverProtocol; 
            } 
            catch (Exception e) {
                abortProcessing = true; 
                if (e is ThreadAbortException || e is StackOverflowException || e is OutOfMemoryException) {
                    throw;
                }
                if (Tracing.On) Tracing.ExceptionCatch(TraceEventType.Warning, this, "Create", e); 
                if (serverProtocol != null) {
                    // give the protocol a shot at handling the error in a custom way 
                    if (!serverProtocol.WriteException(e, serverProtocol.Response.OutputStream)) 
                        throw new InvalidOperationException(Res.GetString(Res.UnableToHandleRequest0), e);
                } 
                return null;
            }

        } 

        protected abstract ServerProtocol CreateIfRequestCompatible(HttpRequest request); 
 
    }
 
}

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

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