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|
//----------------------------------------------------------------
// Copyright (c) Microsoft Corporation. All rights reserved.
//----------------------------------------------------------------
namespace System.ServiceModel.Channels
{
using System;
using System.Globalization;
using System.IO;
using System.Runtime;
using System.ServiceModel.Diagnostics;
using System.Text;
using System.Xml;
using System.Diagnostics;
class WebMessageEncoderFactory : MessageEncoderFactory
{
WebMessageEncoder messageEncoder;
public WebMessageEncoderFactory(Encoding writeEncoding, int maxReadPoolSize, int maxWritePoolSize, XmlDictionaryReaderQuotas quotas, WebContentTypeMapper contentTypeMapper, bool javascriptCallbackEnabled)
{
messageEncoder = new WebMessageEncoder(writeEncoding, maxReadPoolSize, maxWritePoolSize, quotas, contentTypeMapper, javascriptCallbackEnabled);
}
public override MessageEncoder Encoder
{
get { return messageEncoder; }
}
public override MessageVersion MessageVersion
{
get { return messageEncoder.MessageVersion; }
}
internal static string GetContentType(string mediaType, Encoding encoding)
{
string charset = TextEncoderDefaults.EncodingToCharSet(encoding);
if (!string.IsNullOrEmpty(charset))
{
return string.Format(CultureInfo.InvariantCulture, "{0}; charset={1}", mediaType, charset);
}
return mediaType;
}
class WebMessageEncoder : MessageEncoder
{
const string defaultMediaType = "application/xml";
WebContentTypeMapper contentTypeMapper;
string defaultContentType;
// Double-checked locking pattern requires volatile for read/write synchronization
volatile MessageEncoder jsonMessageEncoder;
int maxReadPoolSize;
int maxWritePoolSize;
// Double-checked locking pattern requires volatile for read/write synchronization
volatile MessageEncoder rawMessageEncoder;
XmlDictionaryReaderQuotas readerQuotas;
// Double-checked locking pattern requires volatile for read/write synchronization
volatile MessageEncoder textMessageEncoder;
object thisLock;
Encoding writeEncoding;
bool javascriptCallbackEnabled;
public WebMessageEncoder(Encoding writeEncoding, int maxReadPoolSize, int maxWritePoolSize, XmlDictionaryReaderQuotas quotas, WebContentTypeMapper contentTypeMapper, bool javascriptCallbackEnabled)
{
if (writeEncoding == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("writeEncoding");
}
this.thisLock = new object();
TextEncoderDefaults.ValidateEncoding(writeEncoding);
this.writeEncoding = writeEncoding;
this.maxReadPoolSize = maxReadPoolSize;
this.maxWritePoolSize = maxWritePoolSize;
this.contentTypeMapper = contentTypeMapper;
this.javascriptCallbackEnabled = javascriptCallbackEnabled;
this.readerQuotas = new XmlDictionaryReaderQuotas();
quotas.CopyTo(this.readerQuotas);
this.defaultContentType = GetContentType(defaultMediaType, writeEncoding);
}
public override string ContentType
{
get { return this.defaultContentType; }
}
public override string MediaType
{
get { return defaultMediaType; }
}
public override MessageVersion MessageVersion
{
get { return MessageVersion.None; }
}
MessageEncoder JsonMessageEncoder
{
get
{
if (jsonMessageEncoder == null)
{
lock (ThisLock)
{
if (jsonMessageEncoder == null)
{
jsonMessageEncoder = new JsonMessageEncoderFactory(writeEncoding, maxReadPoolSize, maxWritePoolSize, readerQuotas, javascriptCallbackEnabled).Encoder;
}
}
}
return jsonMessageEncoder;
}
}
MessageEncoder RawMessageEncoder
{
get
{
if (rawMessageEncoder == null)
{
lock (ThisLock)
{
if (rawMessageEncoder == null)
{
rawMessageEncoder = new ByteStreamMessageEncodingBindingElement(readerQuotas).CreateMessageEncoderFactory().Encoder;
((IWebMessageEncoderHelper)rawMessageEncoder).EnableBodyReaderMoveToContent(); // see the comments in IWebMessageEncoderHelper for why this is done
}
}
}
return rawMessageEncoder;
}
}
MessageEncoder TextMessageEncoder
{
get
{
if (textMessageEncoder == null)
{
lock (ThisLock)
{
if (textMessageEncoder == null)
{
textMessageEncoder = new TextMessageEncoderFactory(MessageVersion.None, writeEncoding, maxReadPoolSize, maxWritePoolSize, readerQuotas).Encoder;
}
}
}
return textMessageEncoder;
}
}
object ThisLock
{
get { return thisLock; }
}
public override bool IsContentTypeSupported(string contentType)
{
if (contentType == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("contentType");
}
WebContentFormat messageFormat;
if (TryGetContentTypeMapping(contentType, out messageFormat) &&
(messageFormat != WebContentFormat.Default))
{
return true;
}
return RawMessageEncoder.IsContentTypeSupported(contentType) || JsonMessageEncoder.IsContentTypeSupported(contentType) || TextMessageEncoder.IsContentTypeSupported(contentType);
}
public override Message ReadMessage(ArraySegment<byte> buffer, BufferManager bufferManager, string contentType)
{
if (bufferManager == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new ArgumentNullException("bufferManager"));
}
WebContentFormat format = GetFormatForContentType(contentType);
Message message;
switch (format)
{
case WebContentFormat.Json:
message = JsonMessageEncoder.ReadMessage(buffer, bufferManager, contentType);
message.Properties.Add(WebBodyFormatMessageProperty.Name, WebBodyFormatMessageProperty.JsonProperty);
break;
case WebContentFormat.Xml:
message = TextMessageEncoder.ReadMessage(buffer, bufferManager, contentType);
message.Properties.Add(WebBodyFormatMessageProperty.Name, WebBodyFormatMessageProperty.XmlProperty);
break;
case WebContentFormat.Raw:
message = RawMessageEncoder.ReadMessage(buffer, bufferManager, contentType);
message.Properties.Add(WebBodyFormatMessageProperty.Name, WebBodyFormatMessageProperty.RawProperty);
break;
default:
throw Fx.AssertAndThrow("This should never get hit because GetFormatForContentType shouldn't return a WebContentFormat other than Json, Xml, and Raw");
}
return message;
}
public override Message ReadMessage(Stream stream, int maxSizeOfHeaders, string contentType)
{
if (stream == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new ArgumentNullException("stream"));
}
WebContentFormat format = GetFormatForContentType(contentType);
Message message;
switch (format)
{
case WebContentFormat.Json:
message = JsonMessageEncoder.ReadMessage(stream, maxSizeOfHeaders, contentType);
message.Properties.Add(WebBodyFormatMessageProperty.Name, WebBodyFormatMessageProperty.JsonProperty);
break;
case WebContentFormat.Xml:
message = TextMessageEncoder.ReadMessage(stream, maxSizeOfHeaders, contentType);
message.Properties.Add(WebBodyFormatMessageProperty.Name, WebBodyFormatMessageProperty.XmlProperty);
break;
case WebContentFormat.Raw:
message = RawMessageEncoder.ReadMessage(stream, maxSizeOfHeaders, contentType);
message.Properties.Add(WebBodyFormatMessageProperty.Name, WebBodyFormatMessageProperty.RawProperty);
break;
default:
throw Fx.AssertAndThrow("This should never get hit because GetFormatForContentType shouldn't return a WebContentFormat other than Json, Xml, and Raw");
}
return message;
}
public override ArraySegment<byte> WriteMessage(Message message, int maxMessageSize, BufferManager bufferManager, int messageOffset)
{
if (message == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new ArgumentNullException("message"));
}
if (bufferManager == null)
{
throw TraceUtility.ThrowHelperError(new ArgumentNullException("bufferManager"), message);
}
if (maxMessageSize < 0)
{
throw TraceUtility.ThrowHelperError(new ArgumentOutOfRangeException("maxMessageSize", maxMessageSize,
SR2.GetString(SR2.ValueMustBeNonNegative)), message);
}
if (messageOffset < 0 || messageOffset > maxMessageSize)
{
throw TraceUtility.ThrowHelperError(new ArgumentOutOfRangeException("messageOffset", messageOffset,
SR2.GetString(SR2.JsonValueMustBeInRange, 0, maxMessageSize)), message);
}
ThrowIfMismatchedMessageVersion(message);
WebContentFormat messageFormat = ExtractFormatFromMessage(message);
JavascriptCallbackResponseMessageProperty javascriptResponseMessageProperty;
switch (messageFormat)
{
case WebContentFormat.Json:
return JsonMessageEncoder.WriteMessage(message, maxMessageSize, bufferManager, messageOffset);
case WebContentFormat.Xml:
if (message.Properties.TryGetValue<JavascriptCallbackResponseMessageProperty>(JavascriptCallbackResponseMessageProperty.Name, out javascriptResponseMessageProperty) &&
javascriptResponseMessageProperty != null &&
!String.IsNullOrEmpty(javascriptResponseMessageProperty.CallbackFunctionName))
{
throw TraceUtility.ThrowHelperError(new InvalidOperationException(SR2.JavascriptCallbackNotsupported), message);
}
return TextMessageEncoder.WriteMessage(message, maxMessageSize, bufferManager, messageOffset);
case WebContentFormat.Raw:
if (message.Properties.TryGetValue<JavascriptCallbackResponseMessageProperty>(JavascriptCallbackResponseMessageProperty.Name, out javascriptResponseMessageProperty) &&
javascriptResponseMessageProperty != null &&
!String.IsNullOrEmpty(javascriptResponseMessageProperty.CallbackFunctionName))
{
throw TraceUtility.ThrowHelperError(new InvalidOperationException(SR2.JavascriptCallbackNotsupported), message);
}
return RawMessageEncoder.WriteMessage(message, maxMessageSize, bufferManager, messageOffset);
default:
throw Fx.AssertAndThrow("This should never get hit because GetFormatForContentType shouldn't return a WebContentFormat other than Json, Xml, and Raw");
}
}
public override void WriteMessage(Message message, Stream stream)
{
if (message == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new ArgumentNullException("message"));
}
if (stream == null)
{
throw TraceUtility.ThrowHelperError(new ArgumentNullException("stream"), message);
}
ThrowIfMismatchedMessageVersion(message);
WebContentFormat messageFormat = ExtractFormatFromMessage(message);
JavascriptCallbackResponseMessageProperty javascriptResponseMessageProperty;
switch (messageFormat)
{
case WebContentFormat.Json:
JsonMessageEncoder.WriteMessage(message, stream);
break;
case WebContentFormat.Xml:
if (message.Properties.TryGetValue<JavascriptCallbackResponseMessageProperty>(JavascriptCallbackResponseMessageProperty.Name, out javascriptResponseMessageProperty) &&
javascriptResponseMessageProperty != null &&
!String.IsNullOrEmpty(javascriptResponseMessageProperty.CallbackFunctionName))
{
throw TraceUtility.ThrowHelperError(new InvalidOperationException(SR2.JavascriptCallbackNotsupported), message);
}
TextMessageEncoder.WriteMessage(message, stream);
break;
case WebContentFormat.Raw:
if (message.Properties.TryGetValue<JavascriptCallbackResponseMessageProperty>(JavascriptCallbackResponseMessageProperty.Name, out javascriptResponseMessageProperty) &&
javascriptResponseMessageProperty != null &&
!String.IsNullOrEmpty(javascriptResponseMessageProperty.CallbackFunctionName))
{
throw TraceUtility.ThrowHelperError(new InvalidOperationException(SR2.JavascriptCallbackNotsupported), message);
}
RawMessageEncoder.WriteMessage(message, stream);
break;
default:
throw Fx.AssertAndThrow("This should never get hit because GetFormatForContentType shouldn't return a WebContentFormat other than Json, Xml, and Raw");
}
}
public override IAsyncResult BeginWriteMessage(Message message, Stream stream, AsyncCallback callback, object state)
{
if (message == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new ArgumentNullException("message"));
}
if (stream == null)
{
throw TraceUtility.ThrowHelperError(new ArgumentNullException("stream"), message);
}
ThrowIfMismatchedMessageVersion(message);
return new WriteMessageAsyncResult(message, stream, this, callback, state);
}
public override void EndWriteMessage(IAsyncResult result)
{
WriteMessageAsyncResult.End(result);
}
internal override bool IsCharSetSupported(string charSet)
{
Encoding tmp;
return TextEncoderDefaults.TryGetEncoding(charSet, out tmp);
}
WebContentFormat ExtractFormatFromMessage(Message message)
{
object messageFormatProperty;
message.Properties.TryGetValue(WebBodyFormatMessageProperty.Name, out messageFormatProperty);
if (messageFormatProperty == null)
{
return WebContentFormat.Xml;
}
WebBodyFormatMessageProperty typedMessageFormatProperty = messageFormatProperty as WebBodyFormatMessageProperty;
if ((typedMessageFormatProperty == null) ||
(typedMessageFormatProperty.Format == WebContentFormat.Default))
{
return WebContentFormat.Xml;
}
return typedMessageFormatProperty.Format;
}
WebContentFormat GetFormatForContentType(string contentType)
{
WebContentFormat messageFormat;
if (TryGetContentTypeMapping(contentType, out messageFormat) &&
(messageFormat != WebContentFormat.Default))
{
if (DiagnosticUtility.ShouldTraceInformation)
{
if (string.IsNullOrEmpty(contentType))
{
contentType = "<null>";
}
TraceUtility.TraceEvent(TraceEventType.Information,
TraceCode.RequestFormatSelectedFromContentTypeMapper,
SR2.GetString(SR2.TraceCodeRequestFormatSelectedFromContentTypeMapper, messageFormat.ToString(), contentType));
}
return messageFormat;
}
// Don't pass on null content types to IsContentTypeSupported methods -- they might throw.
// If null content type isn't already mapped, return the default format of Raw.
if (contentType == null)
{
messageFormat = WebContentFormat.Raw;
}
else if (JsonMessageEncoder.IsContentTypeSupported(contentType))
{
messageFormat = WebContentFormat.Json;
}
else if (TextMessageEncoder.IsContentTypeSupported(contentType))
{
messageFormat = WebContentFormat.Xml;
}
else
{
messageFormat = WebContentFormat.Raw;
}
if (DiagnosticUtility.ShouldTraceInformation)
{
TraceUtility.TraceEvent(TraceEventType.Information,
TraceCode.RequestFormatSelectedByEncoderDefaults,
SR2.GetString(SR2.TraceCodeRequestFormatSelectedByEncoderDefaults, messageFormat.ToString(), contentType));
}
return messageFormat;
}
bool TryGetContentTypeMapping(string contentType, out WebContentFormat format)
{
if (contentTypeMapper == null)
{
format = WebContentFormat.Default;
return false;
}
try
{
format = contentTypeMapper.GetMessageFormatForContentType(contentType);
if (!WebContentFormatHelper.IsDefined(format))
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new ArgumentException(SR2.GetString(SR2.UnknownWebEncodingFormat, contentType, format)));
}
return true;
}
catch (Exception e)
{
if (Fx.IsFatal(e))
{
throw;
}
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new CommunicationException(
SR2.GetString(SR2.ErrorEncounteredInContentTypeMapper), e));
}
}
class WriteMessageAsyncResult : ScheduleActionItemAsyncResult
{
Message message;
Stream stream;
MessageEncoder encoder;
WebMessageEncoder webMessageEncoder;
static AsyncCompletion handleEndWriteMessage;
public WriteMessageAsyncResult(Message message, Stream stream, WebMessageEncoder webMessageEncoder, AsyncCallback callback, object state)
: base(callback, state)
{
this.message = message;
this.stream = stream;
this.webMessageEncoder = webMessageEncoder;
WebContentFormat messageFormat = webMessageEncoder.ExtractFormatFromMessage(message);
JavascriptCallbackResponseMessageProperty javascriptResponseMessageProperty;
switch (messageFormat)
{
case WebContentFormat.Json:
this.encoder = webMessageEncoder.JsonMessageEncoder;
this.Schedule();
break;
case WebContentFormat.Xml:
if (message.Properties.TryGetValue<JavascriptCallbackResponseMessageProperty>(JavascriptCallbackResponseMessageProperty.Name, out javascriptResponseMessageProperty) &&
javascriptResponseMessageProperty != null &&
!String.IsNullOrEmpty(javascriptResponseMessageProperty.CallbackFunctionName))
{
throw TraceUtility.ThrowHelperError(new InvalidOperationException(SR2.JavascriptCallbackNotsupported), message);
}
this.encoder = webMessageEncoder.TextMessageEncoder;
this.Schedule();
break;
case WebContentFormat.Raw:
if (message.Properties.TryGetValue<JavascriptCallbackResponseMessageProperty>(JavascriptCallbackResponseMessageProperty.Name, out javascriptResponseMessageProperty) &&
javascriptResponseMessageProperty != null &&
!String.IsNullOrEmpty(javascriptResponseMessageProperty.CallbackFunctionName))
{
throw TraceUtility.ThrowHelperError(new InvalidOperationException(SR2.JavascriptCallbackNotsupported), message);
}
handleEndWriteMessage = new AsyncCompletion(HandleEndWriteMessage);
IAsyncResult result = webMessageEncoder.RawMessageEncoder.BeginWriteMessage(message, stream, PrepareAsyncCompletion(HandleEndWriteMessage), this);
if (SyncContinue(result))
{
this.Complete(true);
}
break;
default:
throw Fx.AssertAndThrow("This should never get hit because GetFormatForContentType shouldn't return a WebContentFormat other than Json, Xml, and Raw");
}
}
protected override void OnDoWork()
{
this.encoder.WriteMessage(this.message, this.stream);
}
static bool HandleEndWriteMessage(IAsyncResult result)
{
WriteMessageAsyncResult thisPtr = (WriteMessageAsyncResult)result.AsyncState;
thisPtr.webMessageEncoder.RawMessageEncoder.EndWriteMessage(result);
return true;
}
}
}
}
}
|
