OutgoingWebResponseContext.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / cdf / src / NetFx35 / System.ServiceModel.Web / System / ServiceModel / Web / OutgoingWebResponseContext.cs / 1407647 / OutgoingWebResponseContext.cs
                        

                        
                            //------------------------------------------------------------ 
// Copyright (c) Microsoft Corporation.  All rights reserved.
//-----------------------------------------------------------
#pragma warning disable 1634, 1691
 
namespace System.ServiceModel.Web
{ 
    using System; 
    using System.Globalization;
    using System.Net; 
    using System.Runtime;
    using System.ServiceModel;
    using System.ServiceModel.Channels;
    using System.ServiceModel.Description; 
    using System.Text;
    using System.Collections.Generic; 
 
    public class OutgoingWebResponseContext
    { 
        internal static readonly string WebResponseFormatPropertyName = "WebResponseFormatProperty";
        internal static readonly string AutomatedFormatSelectionContentTypePropertyName = "AutomatedFormatSelectionContentTypePropertyName";

        Encoding bindingWriteEncoding = null; 

        OperationContext operationContext; 
        internal OutgoingWebResponseContext(OperationContext operationContext) 
        {
            Fx.Assert(operationContext != null, "operationContext is null"); 
            this.operationContext = operationContext;
        }

        public long ContentLength 
        {
            get { return long.Parse(this.MessageProperty.Headers[HttpResponseHeader.ContentLength], CultureInfo.InvariantCulture); } 
            set { this.MessageProperty.Headers[HttpResponseHeader.ContentLength] = value.ToString(CultureInfo.InvariantCulture); } 
        }
 
        public string ContentType
        {
            get { return this.MessageProperty.Headers[HttpResponseHeader.ContentType]; }
            set { this.MessageProperty.Headers[HttpResponseHeader.ContentType] = value; } 
        }
 
        public string ETag 
        {
            get { return this.MessageProperty.Headers[HttpResponseHeader.ETag]; } 
            set { this.MessageProperty.Headers[HttpResponseHeader.ETag] = value; }
        }

        public WebHeaderCollection Headers 
        {
            get { return this.MessageProperty.Headers; } 
        } 

        public DateTime LastModified 
        {
            get
            {
                string dateTime = this.MessageProperty.Headers[HttpRequestHeader.LastModified]; 
                if (!string.IsNullOrEmpty(dateTime))
                { 
                    DateTime parsedDateTime; 
                    if (DateTime.TryParse(dateTime, CultureInfo.InvariantCulture, DateTimeStyles.None, out parsedDateTime))
                    { 
                        return parsedDateTime;
                    }
                }
                return DateTime.MinValue; 
            }
            set 
            { 
                this.MessageProperty.Headers[HttpResponseHeader.LastModified] =
                    (value.Kind == DateTimeKind.Utc ? 
                    value.ToString("R", CultureInfo.InvariantCulture) :
                    value.ToUniversalTime().ToString("R", CultureInfo.InvariantCulture));
            }
        } 

        public string Location 
        { 
            get { return this.MessageProperty.Headers[HttpResponseHeader.Location]; }
            set { this.MessageProperty.Headers[HttpResponseHeader.Location] = value; } 
        }

        public HttpStatusCode StatusCode
        { 
            get { return this.MessageProperty.StatusCode; }
            set { this.MessageProperty.StatusCode = value; } 
        } 

        public string StatusDescription 
        {
            get { return this.MessageProperty.StatusDescription; }
            set { this.MessageProperty.StatusDescription = value; }
        } 

        public bool SuppressEntityBody 
        { 
            get { return this.MessageProperty.SuppressEntityBody; }
            set { this.MessageProperty.SuppressEntityBody = value; } 
        }

        public WebMessageFormat? Format
        { 
            get
            { 
                if (!operationContext.OutgoingMessageProperties.ContainsKey(WebResponseFormatPropertyName)) 
                {
                    return null; 
                }
                return operationContext.OutgoingMessageProperties[WebResponseFormatPropertyName] as WebMessageFormat?;
            }
            set 
            {
                if (value.HasValue) 
                { 
                    if (!WebMessageFormatHelper.IsDefined(value.Value))
                    { 
                        throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new ArgumentOutOfRangeException("value"));
                    }
                    else
                    { 
                        operationContext.OutgoingMessageProperties[WebResponseFormatPropertyName] = value.Value;
                    } 
                } 
                else
                { 
                    operationContext.OutgoingMessageProperties[WebResponseFormatPropertyName] = null;
                }
                this.AutomatedFormatSelectionContentType = null;
            } 
        }
 
        // This is an internal property because we need to carry the content-type that was selected by the FormatSelectingMessageInspector 
        // forward so that the formatter has access to it. However, we dond't want to use the ContentType property on this, because then
        // developers would have to clear the ContentType property manually when overriding the format set by the 
        // FormatSelectingMessageInspector
        internal string AutomatedFormatSelectionContentType
        {
            get 
            {
                if (!operationContext.OutgoingMessageProperties.ContainsKey(AutomatedFormatSelectionContentTypePropertyName)) 
                { 
                    return null;
                } 
                return operationContext.OutgoingMessageProperties[AutomatedFormatSelectionContentTypePropertyName] as string;
            }
            set
            { 
                operationContext.OutgoingMessageProperties[AutomatedFormatSelectionContentTypePropertyName] = value;
            } 
        } 

        public Encoding BindingWriteEncoding 
        {
            get
            {
                if (this.bindingWriteEncoding == null) 
                {
                    string endpointId = this.operationContext.EndpointDispatcher.Id; 
                    Fx.Assert(endpointId != null, "There should always be an valid EndpointDispatcher.Id"); 
                    foreach (ServiceEndpoint endpoint in this.operationContext.Host.Description.Endpoints)
                    { 
                        if (endpoint.Id == endpointId)
                        {
                            WebMessageEncodingBindingElement encodingElement = endpoint.Binding.CreateBindingElements().Find() as WebMessageEncodingBindingElement;
                            if (encodingElement != null) 
                            {
                                this.bindingWriteEncoding = encodingElement.WriteEncoding; 
                            } 
                        }
                    } 
                }
                return this.bindingWriteEncoding;
            }
        } 

        internal HttpResponseMessageProperty MessageProperty 
        { 
            get
            { 
                if (!operationContext.OutgoingMessageProperties.ContainsKey(HttpResponseMessageProperty.Name))
                {
                    operationContext.OutgoingMessageProperties.Add(HttpResponseMessageProperty.Name, new HttpResponseMessageProperty());
                } 
                return operationContext.OutgoingMessageProperties[HttpResponseMessageProperty.Name] as HttpResponseMessageProperty;
            } 
        } 

        public void SetETag(string entityTag) 
        {
            this.ETag = GenerateValidEtagFromString(entityTag);
        }
 
        public void SetETag(int entityTag)
        { 
            this.ETag = GenerateValidEtag(entityTag); 
        }
 
        public void SetETag(long entityTag)
        {
            this.ETag = GenerateValidEtag(entityTag);
        } 

        public void SetETag(Guid entityTag) 
        { 
            this.ETag = GenerateValidEtag(entityTag);
        } 

        public void SetStatusAsCreated(Uri locationUri)
        {
            if (locationUri == null) 
            {
                throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("locationUri"); 
            } 
            this.StatusCode = HttpStatusCode.Created;
            this.Location = locationUri.ToString(); 
        }

        public void SetStatusAsNotFound()
        { 
            this.StatusCode = HttpStatusCode.NotFound;
        } 
 
        public void SetStatusAsNotFound(string description)
        { 
            this.StatusCode = HttpStatusCode.NotFound;
            this.StatusDescription = description;
        }
 
        internal static string GenerateValidEtagFromString(string entityTag)
        { 
            // This method will generate a valid entityTag from a string by doing the following: 
            //   1) Adding surrounding double quotes if the string doesn't already start and end with them
            //   2) Escaping any internal double quotes that aren't already escaped (preceded with a backslash) 
            //   3) If a string starts with a double quote but doesn't end with one, or vice-versa, then the
            //      double quote is considered internal and is escaped.

            if (string.IsNullOrEmpty(entityTag)) 
            {
                return null; 
            } 

            if (entityTag.StartsWith("W/\"", StringComparison.OrdinalIgnoreCase) && 
                entityTag.EndsWith("\"", StringComparison.OrdinalIgnoreCase))
            {
                throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new InvalidOperationException(
                    SR2.GetString(SR2.WeakEntityTagsNotSupported, entityTag))); 
            }
 
            List escapeCharacterInsertIndices = null; 
            int lastEtagIndex = entityTag.Length - 1;
            bool startsWithQuote = entityTag[0] == '\"'; 
            bool endsWithQuote = entityTag[lastEtagIndex] == '\"';

            // special case where the entityTag is a single character, a double quote, '"'
            if (lastEtagIndex == 0 && startsWithQuote) 
            {
                endsWithQuote = false; 
            } 

            bool needsSurroundingQuotes = !startsWithQuote || !endsWithQuote; 

            if (startsWithQuote && !endsWithQuote)
            {
                if (escapeCharacterInsertIndices == null) 
                {
                    escapeCharacterInsertIndices = new List(); 
                } 
                escapeCharacterInsertIndices.Add(0);
            } 

            for (int x = 1; x < lastEtagIndex; x++)
            {
                if (entityTag[x] == '\"' && entityTag[x - 1] != '\\') 
                {
                    if (escapeCharacterInsertIndices == null) 
                    { 
                        escapeCharacterInsertIndices = new List();
                    } 
                    escapeCharacterInsertIndices.Add(x + escapeCharacterInsertIndices.Count);
                }
            }
 
            // Possible that the ending internal quote is already escaped so must check the character before it
            if (!startsWithQuote && endsWithQuote && entityTag[lastEtagIndex -1] != '\\') 
            { 
                if (escapeCharacterInsertIndices == null)
                { 
                    escapeCharacterInsertIndices = new List();
                }
                escapeCharacterInsertIndices.Add(lastEtagIndex + escapeCharacterInsertIndices.Count);
            } 

            if (needsSurroundingQuotes || escapeCharacterInsertIndices != null) 
            { 
                int escapeCharacterInsertIndicesCount = (escapeCharacterInsertIndices == null) ? 0 : escapeCharacterInsertIndices.Count;
                StringBuilder editedEtag = new StringBuilder(entityTag, entityTag.Length + escapeCharacterInsertIndicesCount + 2); 
                for (int x = 0; x < escapeCharacterInsertIndicesCount; x++)
                {
                    editedEtag.Insert(escapeCharacterInsertIndices[x], '\\');
                } 
                if (needsSurroundingQuotes)
                { 
                    editedEtag.Insert(entityTag.Length + escapeCharacterInsertIndicesCount, '\"'); 
                    editedEtag.Insert(0, '\"');
                } 
                entityTag = editedEtag.ToString();
            }

            return entityTag; 
        }
 
        internal static string GenerateValidEtag(object entityTag) 
        {
            return string.Format(CultureInfo.InvariantCulture, "\"{0}\"", entityTag.ToString()); 
        }
    }
}
 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.

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