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This page provides sample code for creating a Crowd Client using the supplied Java integration libraries.
#### com.atlassian.crowd.service.client.CrowdClientThe CrowdClient
is useful for common create, query, update and delete operations for principals, groups and roles. To accomplish this, the CrowdClient
makes use of the REST API of the Crowd server. The class reads in the crowd.properties
configuration file from your application's class path, setting client specific details such as the Crowd server URL and SSO integration details. When the client is loaded into memory, it will then authenticate the the client application with the Crowd server for future REST requests.
A full list of the available methods for the CrowdClient
is available here:
The CrowdHttpAuthenticator
simplifies the authentication of HTTP based clients. When an authentication or invalidation is performed, the CrowdHttpAuthenticator
manages the setting and resetting of integration variables for the principal's HTTP session. If the application has little need beyond authentication and validation, the CrowdHttpAuthenticator
is a simple and very straightforward integration piece. Shown below is a code example of authenticating and logging off a principal:
Example 1:
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RestCrowdHttpAuthenticationFactory.getAuthenticator().authenticate(request, response, username, password);
Example 2:
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RestCrowdHttpAuthenticationFactory.getAuthenticator().logout(request, response);
If there were any issues with the authentication or logout calls, an Exception
will be thrown to the application.
The CrowdHttpAuthenticator
manages the following:
Note both the RestCrowdHttpAuthenticationFactory
and RestCrowdClientFactory
manage singleton instances of the CrowdHttpAuthenticator
and CrowdClient
implementations respectively. You should never need to instantiate the CrowdHttpAuthenticator
or CrowdClient
manually.
The CrowdSecurityFilter
is an HTTP servlet filter that protects secured resources by verifying the session or cookie token is active and the principal has access to the requesting application. The CrowdSecurityFilter
works in conjunction with the CrowdHttpAuthenticator
, validating and setting various session and cookie attributes. Should the principal's token become expired or invalid due to security restrictions, the principal will be redirected to the URL provided by the crowd.properties
.
Using the CrowdSecurityFilter
is very straight forward, simply edit your web.xml
deployment descriptor to reflect the filter and desired resource mapping:
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<filter>
<filter-name>CrowdSecurityFilter</filter-name>
<filter-class>com.atlassian.crowd.integration.http.filter.CrowdSecurityFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>CrowdSecurityFilter</filter-name>
<url-pattern>/secure/*</url-pattern>
</filter-mapping>
In this example, the CrowdSecurityFilter
will prevent any pages on the /secure/ path from being accessed unless a valid token is found.
Should the token expire or be found invalid, the original URL will be stored in the principal's session at a String with the key of CrowdSecurityFilter.ORIGINAL_URL
. This is useful because, when the principal later authenticates, the original URL and parameters can then be used as a redirect bringing the principal back to their original POST
. An example of how this can be accomplished at login is shown below:
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RestCrowdHttpAuthenticationFactory.getAuthenticator().authenticate(request, response, username, password);
// Check if principal was requesting a page that was prevented, if so, redirect.
String requestingPage = (String) getSession().getAttribute(CrowdSecurityFilter.ORIGINAL_URL);
if (requestingPage != null) {
// redirect the principal to the requesting page
response().sendRedirect(requestingPage);
} else {
// return the to the login page
return SUCCESS;
}
If you are using a dependency injection container which manages singleton instances, rather than using the RestCrowdClientFactory
and RestCrowdHttpAuthenticationFactory
to manage singletons, you can wire up the objects themselves as shown in the following diagram:
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<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsd">
<bean id="resourceLocator" class="com.atlassian.crowd.service.client.ClientResourceLocator">
<constructor-arg value="crowd.properties"/>
</bean>
<bean id="clientProperties" class="com.atlassian.crowd.service.client.ClientPropertiesImpl" factory-method="newInstanceFromResourceLocator">
<constructor-arg type="com.atlassian.crowd.service.client.ResourceLocator" ref="resourceLocator"/>
</bean>
<bean id="crowdClientFactory" class="com.atlassian.crowd.integration.rest.service.factory.RestCrowdClientFactory"/>
<bean id="crowdClient" factory-bean="crowdClientFactory" factory-method="newInstance">
<constructor-arg ref="clientProperties"/>
</bean>
<bean id="validationFactorExtractor" class="com.atlassian.crowd.integration.http.util.CrowdHttpValidationFactorExtractorImpl" factory-method="getInstance"/>
<bean id="tokenHelper" class="com.atlassian.crowd.integration.http.util.CrowdHttpTokenHelperImpl" factory-method="getInstance">
<constructor-arg ref="validationFactorExtractor"/>
</bean>
<bean id="crowdHttpAuthenticator" class="com.atlassian.crowd.integration.http.CrowdHttpAuthenticatorImpl">
<constructor-arg ref="crowdClient"/>
<constructor-arg ref="clientProperties"/>
<constructor-arg ref="tokenHelper"/>
</bean>
<bean id="crowdSecurityFilter" class="com.atlassian.crowd.integration.http.filter.CrowdSecurityFilter">
<constructor-arg ref="crowdHttpAuthenticator"/>
<constructor-arg ref="clientProperties"/>
</bean>
</beans>
To use a Spring-injected CrowdSecurityFilter
change the filter definition in your web.xml
to:
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<filter>
<filter-name>crowdSecurityFilter</filter-name>
<filter-class>org.springframework.web.filter.DelegatingFilterProxy</filter-class>
</filter>
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