Code Expire in CAS SSO Server - authentication

Question

I deployed my CAS server with OAuth protocol support
I've added this code to my deployerConfigContext.xml
<bean class="org.jasig.cas.services.RegisteredServiceImpl">
<property name="id" value="1"/>
<property name="name" value="the_key"/>
<property name="description" value="the_secret"/>
<property name="theme" value="my great webapp for OAuth"/>
<property name="serviceId" value="http://localhost:8080/cas/login"/>
<property name="evaluationOrder" value="10000001"/>
<property name="allowedAttributes">
<list>
<!-- facebook -->
<value>the_key</value>
<value>the_secret</value>
</list>
</property>
</bean>
and
<bean id="ticketRegistry" class="org.jasig.cas.ticket.registry.DefaultTicketRegistry">
<constructor-arg index="0" value="1000"/>
<constructor-arg index="1" value="1"/>
<constructor-arg index="2" value="16"/>
</bean>
to define my ticketRegistry
So my OAuth client secret code key is the_secret and the_key
but when I load this URL http://localhost:8080/cas/oauth2.0/accessToken?client_secret=the_secret&grant_type=refresh_token&redirect_uri=http%3A%2F%2Flocalhost%3A8080%2Fcas%2Flogin&code=0&client_id=the_key to test my OAuth protocol, I've got this exception
<Code Expired 0>
Why and how could I fix it?

Answer 1

You need to define two CAS services :
one for internal mechanism of OAuth server support (with CASservice.serviceId = http://localhost:8080/cas/oauth2.0/callbackAuthorize)
one for the each client OAuth application you want to authorize (with oauthclient.key = CASservice.name, oauthclient.secret = CASservice.description, oauthclient.redirect_uri should start with CASservice.serviceId).
The documentation : https://wiki.jasig.org/display/CASUM/OAuth+server+support, part 3...