如何創建安全的Web Service
我們在使用Web Service的過程中，很多情況是需要對web service請求做認證的，對于運行在web容器里的應用程序來說，可能會比較簡單一些，通�？梢酝ㄟ^filter來做一些處理，但是其實CXF本身也提供了對web service認證的方式。
1. 首先是一個簡單pojo
package com.googlecode.garbagecan.cxfstudy.security;
public class User {
private String id;
private String name;
private String password;
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
}
2. Web Service接口
package com.googlecode.garbagecan.cxfstudy.security;
import java.util.List;
import javax.jws.WebMethod;
import javax.jws.WebResult;
import javax.jws.WebService;
@WebService
public interface UserService {
@WebMethod
@WebResult List list();
}
3. Web Service實現類
package com.googlecode.garbagecan.cxfstudy.security;
import java.util.ArrayList;
import java.util.List;
public class UserServiceImpl implements UserService {
public List list() {
List users = new ArrayList();
for (int i = 0; i < 10; i++) {
User user = new User();
user.setId("" + i);
user.setName("user_" + i);
user.setPassword("password_" + i);
users.add(user);
}
return users;
}
}
4. Server端Handler，其中使用了一個Map來存放用戶信息，真是應用中可以使用數據庫或者其它方式獲取用戶和密碼
package com.googlecode.garbagecan.cxfstudy.security;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
import javax.security.auth.callback.Callback;
import javax.security.auth.callback.CallbackHandler;
import javax.security.auth.callback.UnsupportedCallbackException;
import org.apache.ws.security.WSPasswordCallback;
public class ServerUsernamePasswordHandler implements CallbackHandler {
// key is username, value is password
private Map users;
public ServerUsernamePasswordHandler() {
users = new HashMap();
users.put("admin", "admin");
}
public void handle(Callback[] callbacks) throws IOException, UnsupportedCallbackException {
WSPasswordCallback callback = (WSPasswordCallback) callbacks[0];
String id = callback.getIdentifier();
if (users.containsKey(id)) {
if (!callback.getPassword().equals(users.get(id))) {
throw new SecurityException("Incorrect password.");
}
} else {
throw new SecurityException("Invalid user.");
}
}
}
5. Client端Handler，用來設置用戶密碼，在真實應用中可以根據此類和下面的.測試類來修改邏輯設置用戶名和密碼。
package com.googlecode.garbagecan.cxfstudy.security;
import java.io.IOException;
import javax.security.auth.callback.Callback;
import javax.security.auth.callback.CallbackHandler;
import javax.security.auth.callback.UnsupportedCallbackException;
import org.apache.ws.security.WSPasswordCallback;
public class ClientUsernamePasswordHandler implements CallbackHandler {
public void handle(Callback[] callbacks) throws IOException, UnsupportedCallbackException {
WSPasswordCallback callback = (WSPasswordCallback) callbacks[0];
int usage = callback.getUsage();
System.out.println("identifier: " + callback.getIdentifier());
System.out.println("usage: " + callback.getUsage());
if (usage == WSPasswordCallback.USERNAME_TOKEN) {
callback.setPassword("admin");
}
}
}
6. 單元測試類，注意在Server端添加了WSS4JInInterceptor到Interceptor列表中，在Client添加了WSS4JOutInterceptor到Interceptor列表中。
package com.googlecode.garbagecan.cxfstudy.security;
import java.net.SocketTimeoutException;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import javax.xml.ws.WebServiceException;
import junit.framework.Assert;
import org.apache.cxf.endpoint.Client;
import org.apache.cxf.endpoint.Endpoint;
import org.apache.cxf.frontend.ClientProxy;
import org.apache.cxf.interceptor.LoggingInInterceptor;
import org.apache.cxf.interceptor.LoggingOutInterceptor;
import org.apache.cxf.jaxws.JaxWsProxyFactoryBean;
import org.apache.cxf.jaxws.JaxWsServerFactoryBean;
import org.apache.cxf.transport.http.HTTPConduit;
import org.apache.cxf.transports.http.configuration.HTTPClientPolicy;
import org.apache.cxf.ws.security.wss4j.WSS4JInInterceptor;
import org.apache.cxf.ws.security.wss4j.WSS4JOutInterceptor;
import org.apache.ws.security.WSConstants;
import org.apache.ws.security.handler.WSHandlerConstants;
import org.junit.BeforeClass;
import org.junit.Test;
public class UserServiceTest {
private static final String address = "http://localhost:9000/ws/security/userService";
@BeforeClass
public static void setUpBeforeClass() throws Exception {
JaxWsServerFactoryBean factoryBean = new JaxWsServerFactoryBean();
factoryBean.getInInterceptors().add(new LoggingInInterceptor());
factoryBean.getOutInterceptors().add(new LoggingOutInterceptor());
Map props = new HashMap();
props.put("action", "UsernameToken");
props.put("passwordType", "PasswordText");
props.put("passwordCallbackClass", ServerUsernamePasswordHandler.class.getName());
WSS4JInInterceptor wss4JInInterceptor = new WSS4JInInterceptor(props);
factoryBean.getInInterceptors().add(wss4JInInterceptor);
factoryBean.setServiceClass(UserServiceImpl.class);
factoryBean.setAddress(address);
factoryBean.create();
}
@Test
public void testList() {
JaxWsProxyFactoryBean factoryBean = new JaxWsProxyFactoryBean();
factoryBean.setAddress(address);
factoryBean.setServiceClass(UserService.class);
Object obj = factoryBean.create();
Client client = ClientProxy.getClient(obj);
Endpoint endpoint = client.getEndpoint();
Map props = new HashMap();
props.put(WSHandlerConstants.ACTION, WSHandlerConstants.USERNAME_TOKEN);
props.put(WSHandlerConstants.USER, "admin");
props.put(WSHandlerConstants.PASSWORD_TYPE, WSConstants.PW_TEXT);
props.put(WSHandlerConstants.PW_CALLBACK_CLASS, ClientUsernamePasswordHandler.class.getName());
WSS4JOutInterceptor wss4JOutInterceptor = new WSS4JOutInterceptor(props);
endpoint.getOutInterceptors().add(wss4JOutInterceptor);
HTTPConduit conduit = (HTTPConduit) client.getConduit();
HTTPClientPolicy policy = new HTTPClientPolicy();
policy.setConnectionTimeout(5 * 1000);
policy.setReceiveTimeout(5 * 1000);
conduit.setClient(policy);
UserService service = (UserService) obj;
try {
List users = service.list();
Assert.assertNotNull(users);
Assert.assertEquals(10, users.size());
} catch(Exception e) {
if (e instanceof WebServiceException
&& e.getCause() instanceof SocketTimeoutException) {
System.err.println("This is timeout exception.");
} else {
e.printStackTrace();
}
}
}
}
最后運行上面的測試類來測試結果，也可以修改測試方法中的密碼，看看錯誤結果。
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