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//------------------------------------------------------------
// Copyright (c) Microsoft Corporation. All rights reserved.
//------------------------------------------------------------
namespace System.ServiceModel.Dispatcher
{
using System.Net.Mime;
using System.ServiceModel.Channels;
using System.ServiceModel.Web;
using System.Text;
abstract class MultiplexingFormatMapping
{
protected Encoding writeEncoding;
protected string writeCharset;
protected WebContentTypeMapper contentTypeMapper;
abstract public WebMessageFormat MessageFormat { get; }
abstract public WebContentFormat ContentFormat { get; }
abstract public string DefaultMediaType { get; }
abstract protected MessageEncoder Encoder { get; }
ContentType defaultContentType;
public ContentType DefaultContentType
{
get
{
if (defaultContentType == null)
{
defaultContentType = new ContentType(this.DefaultMediaType) { CharSet = this.writeCharset };
}
return defaultContentType;
}
}
public MultiplexingFormatMapping(Encoding writeEncoding, WebContentTypeMapper contentTypeMapper)
{
if (writeEncoding == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("writeEncoding");
}
this.writeEncoding = writeEncoding;
this.writeCharset = TextEncoderDefaults.EncodingToCharSet(writeEncoding);
this.contentTypeMapper = contentTypeMapper;
}
public bool CanFormatResponse(ContentType acceptHeaderElement, bool matchCharset, out ContentType contentType)
{
if (acceptHeaderElement == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("acceptHeaderElement");
}
// Scrub the content type so that it is only mediaType and the charset
string charset = acceptHeaderElement.CharSet;
contentType = new ContentType(acceptHeaderElement.MediaType);
contentType.CharSet = this.DefaultContentType.CharSet;
string contentTypeStr = contentType.ToString();
if (matchCharset &&
!string.IsNullOrEmpty(charset) &&
!string.Equals(charset, this.DefaultContentType.CharSet, StringComparison.OrdinalIgnoreCase))
{
return false;
}
if (this.contentTypeMapper != null &&
this.contentTypeMapper.GetMessageFormatForContentType(contentType.MediaType) == this.ContentFormat)
{
return true;
}
if (this.Encoder.IsContentTypeSupported(contentTypeStr) &&
(charset == null || contentType.CharSet == this.DefaultContentType.CharSet))
{
return true;
}
contentType = null;
return false;
}
}
}
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