Re: java RESTful web service

Tom Anderson <>
Tue, 31 Mar 2009 23:25:52 +0100
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On Tue, 31 Mar 2009, Wouter wrote:

On Mar 31, 2:45?pm, Tom Anderson <> wrote:

On Tue, 31 Mar 2009, Wouter wrote:

I want to create a RESTful java web service. I am developping an
application for Android and I need a web service to handle data! But I
have a problem, I want a user to login with a username and password but
how can I do this with a rest web service?

Use HTTP authentication. In particular, HTTP digest authentication. It's
handled in the HTTP layer, so it doesn't impose any requirements on
application flow which would interfere with the RESTfulness of your web

How are you implementing the web app?

If it's with servlets or JSPs, you can do this by configuration, without
having to write any code. You have to put some stuff in your web.xml
saying which URLs you want protected and a bit about how,

Then there's container-specific configuration about how the authentication
should be done - where the list of users is kept, that sort of thing. In
Tomcat, it's done with the server.xml file; see:

The username and login would be saved in a (mysql) database!

Tomcat can do that - use a JDBCRealm or DataSourceRealm.

Thank you for your answer and this very usefull links Tom! I don't want
to have a real website. Just a backend web service for my android
application! I want to read some xml data (REST objects) and do some
posting on the REST web service. So I have a login screen at my Android
application and i have to make a HttpUrlConnection to the web service
and how can I check if the filled in username and password is correct
(that they exists in the database?) How can I make this in my

As i said. Tell us more about how you're implementing the web service.


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