CodeSnip: Virtual Web Services Through Pattern Matching: ASP Alliance

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CodeSnip: Virtual Web Services Through Pattern Matching

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by Rajesh Toleti
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Step 2: Build a Proxy Class With the AboveWSDL File

Now we have to create a vb.net/c# file using the above WSDL file. Save the above WSDL files as Taryaservices.wsdl. Copy the WSDL file to the directory where you have your WSDL.exe; from the command prompt type the following to generate a vb.net file:

wsdl /l:vb Taryaservices.wsdl

Then it creates a vb.net file with name TaryaService.vb. This name is taken automatically from the WSDL service name. Now copy this file to the directory where you have the Visual Basic .NET Command Line Compiler (vbc.exe). Type the following from command prompt:

vbc / t:library /r:System.dll,System.Web.Services.dll,System.Xml.dll TaryaService.vb

Now that you have created a proxy class with name TaryaService.dll, copy this to your application /bin directory.

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User Comments

Title: great
Name: Saif
Date: 4/10/2006 11:01:51 AM
Comment:
Thank you

Title: Good article
Name: Chandan
Date: 12/13/2005 4:27:01 AM
Comment:
The article is good, and it gives a very good description about the virtual web service

Title: Great article
Name: Kay Lee
Date: 11/29/2005 10:01:14 PM
Comment:
This is a great artice, and I like that you wrote it up. I just wanted point out that this capability may or may not become legally irritating. If the site you're leeching is considered a service for sale type of site, it can become a serious problem.

For the readers, please be discrete and courteous in regards to creating Virtual Web Services.

Title: Virtual Web Services Cannot Be Blocked
Name: Deavon
Date: 11/29/2005 8:19:07 AM
Comment:
Steve Burch:

Unfortunately, there is no way to block a virtual web service; unless you block the content from the end user completely. Anything that can be represented by XML, HTML, RSS, or any other form of non-encrypted data storage can be reparsed and reused.

It is a similar concept to copy and pasting; and then reformatting with customized style sheets; except that, in the form of a VWS, that kind of functionality occurs automatically through compiled processing and parsing of the source file; to generate a SOAP file as the result.

Same data; different way of showing it.

Utilizing .NET's WSDL and Web Service architecture; it is easy to expose the data as a WSDL function; which is exactly what is occuring here.

Title: Nice one
Name: H.
Date: 11/28/2005 2:43:29 AM
Comment:
Cool

Title: Virtual web service -- blocking?
Name: steve burch
Date: 11/27/2005 5:35:01 PM
Comment:
you should show, if possible, how a web site can block someone from doing this.

Title: scan and read scriptedinfo
Name: case
Date: 11/25/2005 1:54:18 AM
Comment:
How do you read a letter that's in scriped.

Title: Good Article
Name: Pavan K
Date: 11/23/2005 5:44:54 AM
Comment:
Its a great article, as it gives complete insight into virtual web service. Its a highly recommended reading.

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