NOTE: These slides have not been updated since 2003. They have been superseded by the book An Introduction to XML and Web Technologies Addison-Wesley, and the accompanying online material. Please see http://www.brics.dk/ixwt/ for more information. Anders Møller and Michael Schwartzbach, February 2006

INTERACTIVE WEB SERVICES WITH JAVA

Risky Business

• the client may receive invalid XML documents (e.g. XHTML, WML)
• the server may receive unexpected form fields

• the Web browser shows ugly XHTML pages
• the WAP phone goes dead, because it cannot handle invalid WML code
• the service is missing data, which the client should have provided
• the client purchased several items, but only the first is shipped
• ...

Site	Errors on cover page
www.altavista.com	29
www.cnn.com	58
www.sun.com	19
www.ibm.com	30
www.microsoft.com	123
www.google.com	27
www.w3c.org	0

JWIG provides means for making this interface safer!

COPYRIGHT © 2002-2003 ANDERS MØLLER & MICHAEL I. SCHWARTZBACH