cas集成oauth，用新浪微博账号登录示例

分类： JAVA CAS 2012-05-15 09:57 2820人阅读评论(25) 收藏举报

新浪微博 string transition class authorization bean

cas官方已经在开发cas与oauth集成的插件，使用的是scribe-up这个项目来获取授权后的用户基本信息。计划在cas3.5.0版本时推出，不过现在已经可以用了，下面将以新浪微博为例，说明如何用新浪微博的账号登录cas，到https://github.com/Jasig/cas/tree/master/cas-server-support-oauth下载源码，把cas-server-support-oauth的依赖添加到你的cas项目中。

先定义两个类，SinaWeiboApi20.java和SinaWeiboProvider.java，SinaWeiboApi20.java主要定义新浪微博的授权链接，SinaWeiboProvider.java主要是获取用户授权后的用户信息。

SinaWeiboApi20.java

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public class SinaWeiboApi20 extends DefaultApi20
{
private static final String AUTHORIZE_URL = "https://api.weibo.com/oauth2/authorize?client_id=%s&redirect_uri=%s&response_type=code";
private static final String SCOPED_AUTHORIZE_URL = AUTHORIZE_URL + "&scope=%s";
@Override
public Verb getAccessTokenVerb()
{
return Verb.POST;
}
@Override
public AccessTokenExtractor getAccessTokenExtractor()
{
return new JsonTokenExtractor();
}
@Override
public String getAccessTokenEndpoint()
{
return "https://api.weibo.com/oauth2/access_token?grant_type=authorization_code";
}
@Override
public String getAuthorizationUrl(OAuthConfig config)
{
// Append scope if present
if (config.hasScope())
{
return String.format(SCOPED_AUTHORIZE_URL, config.getApiKey(), OAuthEncoder.encode(config.getCallback()), OAuthEncoder.encode(config.getScope()));
}
else
{
return String.format(AUTHORIZE_URL, config.getApiKey(), OAuthEncoder.encode(config.getCallback()));
}
}
}

SinaWeiboProvider.java

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public class SinaWeiboProvider extends BaseOAuth20Provider {
@Override
protected void internalInit() {
if (scope != null) {
service = new ServiceBuilder().provider(SinaWeiboApi20.class).apiKey(key)
.apiSecret(secret).callback(callbackUrl).scope(scope).build();
} else {
service = new ServiceBuilder().provider(SinaWeiboApi20.class).apiKey(key)
.apiSecret(secret).callback(callbackUrl).build();
}
String[] names = new String[] {"uid", "username"};
for (String name : names) {
mainAttributes.put(name, null);
}
}
@Override
protected String getProfileUrl() {
return "https://api.weibo.com/2/statuses/user_timeline.json";
}
@Override
protected UserProfile extractUserProfile(String body) {
UserProfile userProfile = new UserProfile();
JsonNode json = JsonHelper.getFirstNode(body);
ArrayNode statuses = (ArrayNode) json.get("statuses");
JsonNode userJson = statuses.get(0).get("user");
if (json != null) {
UserProfileHelper.addIdentifier(userProfile, userJson, "id");
for (String attribute : mainAttributes.keySet()) {
UserProfileHelper.addAttribute(userProfile, json, attribute,
mainAttributes.get(attribute));
}
}
JsonNode subJson = userJson.get("id");
if (subJson != null) {
UserProfileHelper
.addAttribute(userProfile, "uid", subJson.getIntValue());
}
subJson = userJson.get("domain");
if (subJson != null) {
UserProfileHelper.addAttribute(userProfile, "username",
subJson.getTextValue());
}
return userProfile;
}
}

添加SinaWeiboProvider bean声明到applicationContext.xml

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<bean id="sinaWeibo" class="com.xxx.oauth.provider.SinaWeiboProvider">
<property name="key" value="sinaweibo_key" />
<property name="secret" value="sinaweibo_secret" />
<property name="callbackUrl" value="https://sso.xxx.com:9443/login" />
</bean>

其中callbackUrl为你cas的登录地址。

在cas-servlet.xml 中定义OAuthAction bean

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<bean id="oauthAction" class="org.jasig.cas.support.oauth.web.flow.OAuthAction"
p:centralAuthenticationService-ref="centralAuthenticationService" >
<property name="providers">
<list>
<ref bean="sinaWeibo" />
</list>
</property>
</bean>

添加oauthAction到cas的login-webflow.xml中，其主要功能是拦截oauth服务商返回的信息。

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<action-state id="oauthAction">
<evaluate expression="oauthAction" />
<transition on="success" to="sendTicketGrantingTicket" />
<transition on="error" to="ticketGrantingTicketExistsCheck" />
</action-state>

添加OAuthAuthenticationHandler到deployerConfigContext.xml 中的authenticationHandlers处，使其支持oauth验证

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<property name="authenticationHandlers">
<list>
<bean class="org.jasig.cas.support.oauth.authentication.handler.support.OAuthAuthenticationHandler">
<property name="providers">
<list>
<ref bean="sinaWeibo" />
</list>
</property>
</bean>
</list>
</property>

添加OAuthCredentialsToPrincipalResolver 到deployerConfigContext.xml中的credentialsToPrincipalResolvers处。

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<property name="credentialsToPrincipalResolvers">
<list>
<bean class="org.jasig.cas.support.oauth.authentication.principal.OAuthCredentialsToPrincipalResolver" >
</bean>
</list>
</property>

如果想获取从oauth返回的用户信息，就必须添加OAuthAuthenticationMetaDataPopulator到deployerConfigContext.xml中authenticationMetaDataPopulators处。

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<property name="authenticationMetaDataPopulators">
<list>
<bean class="org.jasig.cas.support.oauth.authentication.OAuthAuthenticationMetaDataPopulator" />
</list>
</property>

最后一步就添加用新浪微博账号登录的链接到登录页面

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<a href="${SinaWeiboProviderUrl}">用新浪微博登录</a>

大功告成!

参考资料：https://wiki.jasig.org/display/CASUM/OAuth+client+support

本文地址：http://blog.csdn.net/laigood12345/article/details/7567247

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