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Tuesday, January 15, 2008 5:00 AM

Not Omitting the XML Declaration

Why doesn't a message start with an XML declaration? The XML declaration is a processing instruction at the beginning of an XML document that gives information about the format and logical structure of the document. You've probably seen the most commonly
Posted by Nicholas Allen | 1 Comments
Wednesday, July 11, 2007 5:00 AM

Reader Quotas with Untyped Messages

I have an operation contract that uses untyped messages. When using the message, I get an error telling me to change the quota settings on the XmlReader. Where are these quotas located? I'm not using an XmlReader. A message represents an XML InfoSet.
Posted by Nicholas Allen | 1 Comments
Thursday, July 05, 2007 5:00 AM

Adding HTTP Headers

Why doesn't anything happen when I try to add HTTP headers from a message encoder? The problem here is a basic issue of timing. Recall the interface contract that a message encoder has with its transport. The transport receives a message from the next
Posted by Nicholas Allen | 2 Comments
Friday, June 01, 2007 5:00 AM

Binary Encodings and Addressing

There are three types of message encodings that come with WCF: text, binary, and MTOM. Text is the traditional way of encoding an XML document; MTOM is an interoperable way to create messages with attachments; and binary is an optimized format. The binary
Posted by Nicholas Allen | 2 Comments
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Monday, April 09, 2007 5:00 AM

What a Binary Encoding Means

There has always been some confusion about what it means to use a "binary encoding" with your web service. The word encoding is used in a very specific sense here, which should also help you figure out the implications of choosing an encoder in the future.
Posted by Nicholas Allen | 1 Comments
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Monday, November 13, 2006 5:00 AM

Handling Message Encoder Errors

This time it's two questions that have the same answer. What contract does the message encoder have for producing a message from ReadMessage? What should the transport do if the message encoder doesn't produce a message from the buffer you give it? The
Posted by Nicholas Allen | 3 Comments
Monday, October 30, 2006 5:00 AM

The GetProperty Picture

I drew this picture for myself while working on the guidelines for implementing GetProperty . I figured that other people might find it useful as well. One of the guidelines is that queryable properties on design time objects should flow to the corresponding
Posted by Nicholas Allen | 1 Comments
Thursday, October 26, 2006 5:00 AM

Implementation Guidelines for GetProperty

This post is just some quick thinking about guidelines for implementing the GetProperty method. These guidelines are still in development so think of this as a draft rather than real guidance at this time. Background: We provide an extensibility point
Posted by Nicholas Allen | 6 Comments
Thursday, June 29, 2006 5:00 AM

Some Changes for Channels and Transports in the June CTP, Part 3

Today's look at recent changes covers two cool new features. Better support out-of-the-box for building applications in the POX/REST style. Back in March, I talked about the POX support we added for the February CTP and a bug we found in our implementation
Posted by Nicholas Allen | 5 Comments
Tuesday, June 20, 2006 5:00 AM

Framing Size Limits for the Tcp and Named Pipe Transports

I've talked about the framing that goes on in the network stack before, but today's topic is a case where the framing actually affects what your application can do. Inside the WCF transport, essentially the uppermost level of the WCF network stack that
Posted by Nicholas Allen | 1 Comments
Tuesday, May 30, 2006 5:00 AM

Versioning for Addresses, Envelopes, and Messages

The versioning of a message in WCF is a combination of the versioning of the envelope format and the addressing format. In Beta 2, the versioning story is a little out-of-date from where it's going to be for the final release. That's simply due to the
Posted by Nicholas Allen | 2 Comments
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Wednesday, May 24, 2006 5:00 AM

Choosing a Transport

This is the last planned article in a documentation series covering various aspects of Windows Communication Foundation transports. Today's topic covers how to choose a transport and associated encoder. Choosing a Transport The Windows Communication Foundation
Posted by Nicholas Allen | 5 Comments
Monday, May 22, 2006 5:00 AM

Using the BufferManager

A BufferManager recycles the byte buffers used when reading and writing buffered messages . There's some allocation overhead creating these frequently used buffers, making buffer recycling a net win in high-throughput scenarios. As you move to larger
Posted by Nicholas Allen | 4 Comments
Tuesday, May 16, 2006 5:00 AM

Building a Custom Message Encoder to Record Throughput, Part 4

One of the advantages of using WCF is that you can change the network protocol without changing how your application works. Let's show that off a bit while also looking at what the counting message encoder stats look like for some common scenarios. Last
Posted by Nicholas Allen | 2 Comments
Monday, May 15, 2006 5:00 AM

Building A Custom Message Encoder to Record Throughput, Part 3

After a short break we're back to working on the custom message encoder. The complete source code for the encoder is available in Part 1 and Part 2 of this series. Today and tomorrow I'll be performing some runs using the encoder to show how it works.
Posted by Nicholas Allen | 8 Comments
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