Apache CXF自定義攔截器實現權限控制
一. 攔截器
在我們學習Java的征途中碰到了很多攔截器: Servlet中的Filter就是一個攔截器, Struts2中也有攔截器,.
CXF中的攔截器其基本原理還是使用動態代理, 我們可以在不對核心模塊進行修改的情況下, 動態添加一些功能, 從而降低代碼的耦合性.
二. CXF攔截器
CXF通過在Interceptor中對消息進行特殊處理, 實現了很多重要功能模塊, 例如: 日志記錄, soap消息處理, 消息的壓縮處理.
下面我們使用一個例子介紹CXF Log攔截器:
1. 服務端添加日志攔截器:
public class MyServer {
public static void main(String[] args) {
HelloService helloService = new HelloServiceImpl();
EndpointImpl epi = (EndpointImpl)Endpoint.publish("http://localhost/sayHello", helloService);
epi.getInInterceptors().add(new LoggingInInterceptor()); // 添加服務器端in log攔截器
epi.getOutInterceptors().add(new LoggingOutInterceptor()); // 添加服務器端out log攔截器
System.out.println("Web Service 暴露成功");
}
} 2. 客戶端添加日志攔截器
public class MyClient {
public static void main(String[] args) {
HelloServiceImplService factory = new HelloServiceImplService();
HelloService helloService = factory.getHelloServiceImplPort();
Client client = ClientProxy.getClient(helloService);
client.getInInterceptors().add(new LoggingInInterceptor()); // 添加客戶端in log攔截器
client.getOutInterceptors().add(new LoggingOutInterceptor()); // 添加客戶端out log攔截器
System.out.println(helloService.sayHello("zhangsan"));
}
} </pre><a style="text-indent:0px;" title="派生到我的代碼片" href="/misc/goto?guid=4959555633058627956" target="_blank"></a></div>
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其他程序代碼請參考上一篇博客: http://blog.csdn.net/zdp072/article/details/27829831
客戶端需要引入以下jar包: cxf-2.2.10.jar wsdl4j-1.6.2.jar XmlSchema-1.4.5.jar
3. 日志如下: - - 服務端
2014-6-7 23:04:28 org.apache.cxf.service.factory.ReflectionServiceFactoryBean buildServiceFromClass
信息: Creating Service {http://impl.service.zdp.com/}HelloServiceImplService from class com.zdp.service.HelloService
2014-6-7 23:04:28 org.apache.cxf.endpoint.ServerImpl initDestination
信息: Setting the server's publish address to be http://localhost:80/sayHello
2014-06-07 23:04:28.718::INFO: Logging to STDERR via org.mortbay.log.StdErrLog
2014-06-07 23:04:28.726::INFO: jetty-6.1.21
2014-06-07 23:04:28.799::INFO: Started SelectChannelConnector@localhost:80
Web Service 暴露成功
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客戶端
2014-6-7 23:05:26 org.apache.cxf.service.factory.ReflectionServiceFactoryBean buildServiceFromWSDL
信息: Creating Service {http://impl.service.zdp.com/}HelloServiceImplService from WSDL: http://localhost/sayHello?wsdl
2014-6-7 23:05:26 org.apache.cxf.interceptor.LoggingOutInterceptor$LoggingCallback onClose
信息: Outbound Message
ID: 1
Address: http://localhost/sayHello
Encoding: UTF-8
Content-Type: text/xml
Headers: {SOAPAction=[""], Accept=[/]}
Payload: <soap:Envelope xmlns:soap=" xmlns:ns2=";
2014-6-7 23:05:26 org.apache.cxf.interceptor.LoggingInInterceptor logging
信息: Inbound Message
ID: 1
Response-Code: 200
Encoding: UTF-8
Content-Type: text/xml; charset=utf-8
Headers: {content-type=[text/xml; charset=utf-8], Content-Length=[275], Server=[Jetty(6.1.21)]}
Payload: <soap:Envelope xmlns:soap="http://schemas.xmlsoap.org /soap/envelope /"><soap:Body><ns1:sayHelloResponse xmlns:ns1="http: //service.zdp.com/"><return>zhangsan, 您好! 現在的時間 是: Sat Jun 07 23:05:26 CST 2014</return></ns1:sayHelloResponse></soap:Body></soap:Envelope>
zhangsan, 您好! 現在的時間是: Sat Jun 07 23:05:26 CST 2014 </pre></div>
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三. CXF自定義攔截器
如何使用CXF進行權限控制呢?
思路: 服務器端要求input消息總是攜帶有用戶名, 密碼信息, 如果沒有用戶名和密碼信息, 直接拒絕調用.\
代碼實現:
1. 服務器端攔截器:
/**
服務端權限攔截器
*/
public class AuthInterceptor extends AbstractPhaseInterceptor<SoapMessage> {
public AuthInterceptor() {
super(Phase.PRE_INVOKE); //攔截器在調用方法之前攔截SOAP消息
}
// 攔截器操作
@Override
public void handleMessage(SoapMessage msg) throws Fault {
System.out.println("come to auth interceptor...");
//獲取SOAP消息的所有Header
List<Header> headers = msg.getHeaders();
if(headers == null || headers.size() < 1) {
throw new Fault(new IllegalArgumentException("沒有Header,攔截器實施攔截"));
}
//獲取Header攜帶是用戶和密碼信息
Header firstHeader = headers.get(0);
Element element = (Element) firstHeader.getObject();
NodeList userNameElement = element.getElementsByTagName("userName");
NodeList passwordElement = element.getElementsByTagName("password");
if (userNameElement.getLength() != 1) {
throw new Fault(new IllegalArgumentException("用戶名格式不對"));
}
if (passwordElement.getLength() != 1) {
throw new Fault(new IllegalArgumentException("用戶密碼格式不對"));
}
//獲取元素的文本內容
String userName = userNameElement.item(0).getTextContent();
String password = passwordElement.item(0).getTextContent();
// 實際項目中, 應該去查詢數據庫, 該用戶名,密碼是否被授權調用該webservice
if (!userName.equals("zhangsan") || !password.equals("123456")) {
throw new Fault(new IllegalArgumentException("用戶名或密碼不正確"));
}
}
} </pre></div>
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2. 客戶端攔截器
/**
客戶端攔截器(在xml片段中加頭部)
*/
public class AddHeaderInterceptor extends AbstractPhaseInterceptor<SoapMessage>{
private String userName;
private String password;
public AddHeaderInterceptor(String userName, String password) {
super(Phase.PREPARE_SEND);
this.userName = userName;
this.password = password;
}
@Override
public void handleMessage(SoapMessage msg) throws Fault {
List<Header> headers = msg.getHeaders();
//創建Document對象
Document document = DOMUtils.createDocument();
Element element = document.createElement("authHeader");
//配置服務器端Head信息的用戶密碼
Element userNameElement= document.createElement("userName");
userNameElement.setTextContent(userName);
Element passwordElement = document.createElement("password");
passwordElement.setTextContent(password);
element.appendChild(userNameElement);
element.appendChild(passwordElement);
headers.add(new Header(new QName(""), element));
/**
* 生成的XML文檔
* <authHeader>
* <userName>zhangsan</userName>
* <password>123456</password>
* </authHeader>
*/
服務端</span>
public class MyServer {
public static void main(String[] args) {
HelloService helloService = new HelloServiceImpl();
EndpointImpl epi = (EndpointImpl)Endpoint.publish("http://localhost/sayHello", helloService);
// 添加服務器端in 權限攔截器, 該AuthInterceptor就會負責檢查用戶名, 密碼是否正確
epi.getInInterceptors().add(new AuthInterceptor());
System.out.println("Web Service 暴露成功");
}
客戶端</span>
public class MyClient {
public static void main(String[] args) {
HelloServiceImplService factory = new HelloServiceImplService();
// 此處返回的只是webservice的代理
HelloService helloService = factory.getHelloServiceImplPort();
Client client = ClientProxy.getClient(helloService);
client.getOutInterceptors().add(new AddHeaderInterceptor("zhangsan", "123456"));
System.out.println(helloService.sayHello("zhangsan"));
}
} </pre></div>
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來自:http://blog.csdn.net/zdp072/article/details/29245575
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