WCF: Building an HTTP User Agent Message Inspector

re: WCF: Building an HTTP User Agent Message Inspector

Paulo Morgado — Tue, 17 Feb 2009 23:02:32 GMT

Always glad to help.

re: WCF: Building an HTTP User Agent Message Inspector

Sergey Kostrukov — Tue, 17 Feb 2009 21:55:55 GMT

Thank you for your post. It works!

re: WCF: Building an HTTP User Agent Message Inspector

Paulo Morgado — Thu, 04 Dec 2008 00:48:43 GMT

Hi Chris,

It has been some time since I plyed with this and I made it from a sample.

I don't really know what is the instance creation ratio and if there are threading issues.

Have you tried it?

re: WCF: Building an HTTP User Agent Message Inspector

Chris — Wed, 03 Dec 2008 15:55:24 GMT

I know this post is a bit old, but I wanted to point something out. One thing that I keep seeing with message inspectors. Using the setup you described you end up having to create multiple classes in order to do one thing. Only one of those classes derives from a base, the rest simply implement interfaces. So why don't you just do the following?

HttpUserAgentEndpointBehavior : BehaviorExtensionElement, IEndpointBehavior, IClientMessageInspector

Then you can have 1 class that performs all the tasks that you need.

re: WCF: Building an HTTP User Agent Message Inspector

Paulo Morgado — Sat, 26 Jul 2008 17:22:45 GMT

@saudamini

What exactly do you want to validate? Have looked at the Validation Application Block in the Entreprise Library? There's an implementation to validate data contracts.

One way to test this is having a proxy like Fiddler and look at the HTTP payload.

re: WCF: Building an HTTP User Agent Message Inspector

saudamini — Fri, 25 Jul 2008 15:27:26 GMT

How do i test this?

re: WCF: Building an HTTP User Agent Message Inspector

saudamini — Fri, 25 Jul 2008 15:22:59 GMT

what i need to do is, valid the input against the data contract i have. Do you think this will be useful?

re: WCF: Building an HTTP User Agent Message Inspector

Paulo Morgado — Mon, 17 Sep 2007 22:15:25 GMT

Hi Rama,

There must be something else there.

If the body of the HTTP request gets to the server, the HTTP headers must get ther first.

Have you tried to use something like the Fiddler tool to see what's going on the wire?

re: WCF: Building an HTTP User Agent Message Inspector

Rama — Mon, 17 Sep 2007 04:44:15 GMT

Hi,

I used the same method as you specified in this post, to add some custom HTTP headers. But there seems to be some kind of timing issue in the headers reaching the server. The headers don't reach the server on time always. So my program works when I run it in a debugger but does not work otherwise.

Do you have any ideas on how I could fix this?

Thanks

-Rama