CreateSequence.cs source code in C# .NET

                        Code:
                         / WCF / WCF / 3.5.30729.1 / untmp / Orcas / SP / ndp / cdf / src / WCF / ServiceModel / System / ServiceModel / Channels / CreateSequence.cs / 1 / CreateSequence.cs
                        
                        
                            //---------------------------------------------------------------------------- 
// Copyright (c) Microsoft Corporation.  All rights reserved.
//---------------------------------------------------------------------------
namespace System.ServiceModel.Channels
{ 
    using System;
    using System.ServiceModel; 
    using System.ServiceModel.Security; 
    using System.Xml;
    using System.Xml.Schema; 

    using System.Xml.Serialization;

    sealed class CreateSequence : BodyWriter 
    {
        AddressingVersion addressingVersion; 
        IClientReliableChannelBinder binder; 
        UniqueId offerIdentifier;
        bool ordered; 
        ReliableMessagingVersion reliableMessagingVersion;

        CreateSequence() : base(true)
        { 
        }
 
        public CreateSequence(AddressingVersion addressingVersion, ReliableMessagingVersion reliableMessagingVersion, 
            bool ordered, IClientReliableChannelBinder binder, UniqueId offerIdentifier)
            : base(true) 
        {
            this.addressingVersion = addressingVersion;
            this.reliableMessagingVersion = reliableMessagingVersion;
            this.ordered = ordered; 
            this.binder = binder;
            this.offerIdentifier = offerIdentifier; 
        } 

        public static CreateSequenceInfo Create(MessageVersion messageVersion, 
            ReliableMessagingVersion reliableMessagingVersion, ISecureConversationSession securitySession,
            XmlDictionaryReader reader)
        {
            if (reader == null) 
            {
                DiagnosticUtility.DebugAssert("Argument reader cannot be null."); 
            } 

            try 
            {
                CreateSequenceInfo info = new CreateSequenceInfo();
                WsrmFeb2005Dictionary wsrmFeb2005Dictionary = XD.WsrmFeb2005Dictionary;
                XmlDictionaryString wsrmNs = WsrmIndex.GetNamespace(reliableMessagingVersion); 
                reader.ReadStartElement(wsrmFeb2005Dictionary.CreateSequence, wsrmNs);
 
                info.AcksTo = EndpointAddress.ReadFrom(messageVersion.Addressing, reader, wsrmFeb2005Dictionary.AcksTo, wsrmNs); 

                if (reader.IsStartElement(wsrmFeb2005Dictionary.Expires, wsrmNs)) 
                {
                    info.Expires = reader.ReadElementContentAsTimeSpan();
                }
 
                if (reader.IsStartElement(wsrmFeb2005Dictionary.Offer, wsrmNs))
                { 
                    reader.ReadStartElement(); 

                    reader.ReadStartElement(wsrmFeb2005Dictionary.Identifier, wsrmNs); 
                    info.OfferIdentifier = reader.ReadContentAsUniqueId();
                    reader.ReadEndElement();

                    bool wsrm11 = reliableMessagingVersion == ReliableMessagingVersion.WSReliableMessaging11; 
                    Wsrm11Dictionary wsrm11Dictionary = wsrm11 ? DXD.Wsrm11Dictionary : null;
 
                    if (wsrm11) 
                    {
                        EndpointAddress endpoint = EndpointAddress.ReadFrom(messageVersion.Addressing, reader, 
                            wsrm11Dictionary.Endpoint, wsrmNs);

                        if (endpoint.Uri != info.AcksTo.Uri)
                        { 
                            string reason = SR.GetString(SR.CSRefusedAcksToMustEqualEndpoint);
                            Message faultReply = WsrmUtilities.CreateCSRefusedProtocolFault(messageVersion, reliableMessagingVersion, reason); 
                            throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(WsrmMessageInfo.CreateInternalFaultException(faultReply, reason, new ProtocolException(reason))); 
                        }
                    } 

                    if (reader.IsStartElement(wsrmFeb2005Dictionary.Expires, wsrmNs))
                    {
                        info.OfferExpires = reader.ReadElementContentAsTimeSpan(); 
                    }
 
                    if (wsrm11) 
                    {
                        if (reader.IsStartElement(wsrm11Dictionary.IncompleteSequenceBehavior, wsrmNs)) 
                        {
                            string incompleteSequenceBehavior = reader.ReadElementContentAsString();

                            if ((incompleteSequenceBehavior != Wsrm11Strings.DiscardEntireSequence) 
                                && (incompleteSequenceBehavior != Wsrm11Strings.DiscardFollowingFirstGap)
                                && (incompleteSequenceBehavior != Wsrm11Strings.NoDiscard)) 
                            { 
                                string reason = SR.GetString(SR.CSRefusedInvalidIncompleteSequenceBehavior);
                                Message faultReply = WsrmUtilities.CreateCSRefusedProtocolFault(messageVersion, reliableMessagingVersion, reason); 
                                throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(
                                    WsrmMessageInfo.CreateInternalFaultException(faultReply, reason,
                                    new ProtocolException(reason)));
                            } 

                            // Otherwise ignore the value. 
                        } 
                    }
 
                    while (reader.IsStartElement())
                    {
                        reader.Skip();
                    } 

                    reader.ReadEndElement(); 
                } 

                // Check for security only if we expect a soap security session. 
                if (securitySession != null)
                {
                    bool hasValidToken = false;
 
                    // Since the security element is amongst the extensible elements (i.e. there is no
                    // gaurantee of ordering or placement), a loop is required to attempt to parse the 
                    // security element. 
                    while (reader.IsStartElement())
                    { 
                        if (securitySession.TryReadSessionTokenIdentifier(reader))
                        {
                            hasValidToken = true;
                            break; 
                        }
 
                        reader.Skip(); 
                    }
 
                    if (!hasValidToken)
                    {
                        string reason = SR.GetString(SR.CSRefusedRequiredSecurityElementMissing);
                        Message faultReply = WsrmUtilities.CreateCSRefusedProtocolFault(messageVersion, reliableMessagingVersion, reason); 
                        throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(WsrmMessageInfo.CreateInternalFaultException(faultReply, reason, new ProtocolException(reason)));
                    } 
                } 

                while (reader.IsStartElement()) 
                {
                    reader.Skip();
                }
 
                reader.ReadEndElement();
 
                if (reader.IsStartElement()) 
                {
                    string reason = SR.GetString(SR.CSRefusedUnexpectedElementAtEndOfCSMessage); 
                    Message faultReply = WsrmUtilities.CreateCSRefusedProtocolFault(messageVersion, reliableMessagingVersion, reason);
                    throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(WsrmMessageInfo.CreateInternalFaultException(faultReply, reason, new ProtocolException(reason)));
                }
 
                return info;
            } 
            catch (XmlException e) 
            {
                string reason = SR.GetString(SR.CouldNotParseWithAction, WsrmIndex.GetCreateSequenceActionString(reliableMessagingVersion)); 
                Message faultReply = WsrmUtilities.CreateCSRefusedProtocolFault(messageVersion, reliableMessagingVersion, reason);
                throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(WsrmMessageInfo.CreateInternalFaultException(faultReply, reason, new ProtocolException(reason, e)));
            }
        } 

        protected override void OnWriteBodyContents(XmlDictionaryWriter writer) 
        { 
            WsrmFeb2005Dictionary wsrmFeb2005Dictionary = XD.WsrmFeb2005Dictionary;
            XmlDictionaryString wsrmNs = WsrmIndex.GetNamespace(this.reliableMessagingVersion); 
            writer.WriteStartElement(wsrmFeb2005Dictionary.CreateSequence, wsrmNs);

            EndpointAddress localAddress = this.binder.LocalAddress;
            localAddress.WriteTo(this.addressingVersion, writer, wsrmFeb2005Dictionary.AcksTo, wsrmNs); 

            if (this.offerIdentifier != null) 
            { 
                writer.WriteStartElement(wsrmFeb2005Dictionary.Offer, wsrmNs);
                writer.WriteStartElement(wsrmFeb2005Dictionary.Identifier, wsrmNs); 
                writer.WriteValue(this.offerIdentifier);
                writer.WriteEndElement();

                if (this.reliableMessagingVersion == ReliableMessagingVersion.WSReliableMessaging11) 
                {
                    Wsrm11Dictionary wsrm11Dictionary = DXD.Wsrm11Dictionary; 
                    localAddress.WriteTo(this.addressingVersion, writer, wsrm11Dictionary.Endpoint, wsrmNs); 

                    writer.WriteStartElement(wsrm11Dictionary.IncompleteSequenceBehavior, wsrmNs); 
                    writer.WriteValue(
                        this.ordered ? wsrm11Dictionary.DiscardFollowingFirstGap : wsrm11Dictionary.NoDiscard);
                    writer.WriteEndElement();
                } 

                writer.WriteEndElement(); 
            } 

            ISecureConversationSession securitySession = this.binder.GetInnerSession() as ISecureConversationSession; 
            if (securitySession != null)
                securitySession.WriteSessionTokenIdentifier(writer);

            writer.WriteEndElement(); 
        }
    } 
} 


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

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