我有一个执行身份验证的Web应用程序，然后在请求中检查cookie以允许来自同一客户端的后续调用。我编写了一段代码，当我从eclipse运行它时工作得很好，但是从android模拟器运行时失败了。这就是我做的事情
为URI创建webresource并将过滤器绑定到它以将cookie附加到请求
的类public class TolvenRestClient {
private static Client client;
private static final ThreadLocal<String> instance = new ThreadLocal<String>();
static {
ClientConfig config = new DefaultClientConfig();
client = Client.create(config);
client.setFollowRedirects(true);
}
private Client getClient() {
return client;
}
public WebResource getResource(String path){
WebResource webResource = getClient().resource(path);
webResource.addFilter(new ClientFilter() {
@Override
public ClientResponse handle(ClientRequest clientRequest) throws ClientHandlerException {
if (instance.get() != null) {
clientRequest.getHeaders().putSingle("Cookie", "SSOCookie=" + instance.get());
}
ClientResponse clientResponse = getNext().handle(clientRequest);
String cookieName = "SSOCookie";
System.out.println("cookies "+clientResponse.getCookies());
for (NewCookie newCookie : clientResponse.getCookies()) {
if (cookieName.equals(newCookie.getName())) {
String extendedSessionId = newCookie.getValue();
instance.set(extendedSessionId);
break;
}
}
return clientResponse;
}
});
return webResource;
}
然后是一个触发webservice调用的示例代码
RestClient client = new RestClient();
MultivaluedMap<String, String> formData = new MultivaluedMapImpl();
formData.add("username", "demo");
formData.add("password", "1234qwer");
formData.add("realm", "tolven");
WebResource webResource = client.getResource("https://dev.example.com:8443/gatekeeper/rs/authenticate/login");
ClientResponse response = webResource.type(MediaType.APPLICATION_FORM_URLENCODED).post(ClientResponse.class,formData);
//ClientResponse response = webResource.accept("text/html").get(ClientResponse.class);
System.out.println("Here ....." + response.toString());
webResource = client.getResource("https://dev.example.com:8443/api/vestibule/accountList");
response = webResource.get(ClientResponse.class);
Accounts accounts = response.getEntity(Accounts.class);
从eclipse运行时，此代码运行正常。但是当在android模拟器中运行时，它无法从客户端响应中读取cookie
我得到以下异常
09-20 19:55:31.067: W/System.err(1172): java.lang.NullPointerException
09-20 19:55:31.077: W/System.err(1172): at javax.ws.rs.core.NewCookie.valueOf(NewCookie.java:126)
09-20 19:55:31.077: W/System.err(1172): at com.sun.jersey.api.client.ClientResponse.getCookies(ClientResponse.java:714)
09-20 19:55:31.077: W/System.err(1172): at com.userexample.LoginActivityTolven$1$1.handle(LoginActivityTolven.java:71)
09-20 19:55:31.088: W/System.err(1172): at com.sun.jersey.api.client.WebResource.handle(WebResource.java:680)
09-20 19:55:31.088: W/System.err(1172): at com.sun.jersey.api.client.WebResource.access$200(WebResource.java:74)
09-20 19:55:31.097: W/System.err(1172): at com.sun.jersey.api.client.WebResource$Builder.post(WebResource.java:568)
09-20 19:55:31.097: W/System.err(1172): at com.userexample.LoginActivityTolven$1.onClick(LoginActivityTolven.java:86)
09-20 19:55:31.097: W/System.err(1172): at android.view.View.performClick(View.java:4240)
09-20 19:55:31.097: W/System.err(1172): at android.view.View$PerformClick.run(View.java:17721)
09-20 19:55:31.107: W/System.err(1172): at android.os.Handler.handleCallback(Handler.java:730)
09-20 19:55:31.107: W/System.err(1172): at android.os.Handler.dispatchMessage(Handler.java:92)
09-20 19:55:31.107: W/System.err(1172): at android.os.Looper.loop(Looper.java:137)
09-20 19:55:31.107: W/System.err(1172): at android.app.ActivityThread.main(ActivityThread.java:5103)
09-20 19:55:31.107: W/System.err(1172): at java.lang.reflect.Method.invokeNative(Native Method)
09-20 19:55:31.117: W/System.err(1172): at java.lang.reflect.Method.invoke(Method.java:525)
09-20 19:55:31.117: W/System.err(1172): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
09-20 19:55:31.117: W/System.err(1172): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
09-20 19:55:31.117: W/System.err(1172): at dalvik.system.NativeStart.main(Native Method)
有没有人试过在Android上使用Jersey客户端并看到这个问题？
答案 0 :(得分：1)
看起来你正在使用Jersey 1.x并且NewCookie中的JAX-RS运行时委托为空。
如果找不到Jersey META-INF / services文件，就会发生这种情况。 如果不重新打包META-INF / services文件，Android重新打包过程可能是您的问题的根源，请务必检查。
一种方法是通过提供您自己的ServiceIteratorProvider来覆盖服务定位算法。
见：
这里的参考是示例代码：
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import com.sun.jersey.spi.service.ServiceFinder.ServiceIteratorProvider;
public class YourOwnServiceIteratorProvider<T> extends ServiceIteratorProvider<T>
{
private static final HashMap<String, String[]> SERVICES = new HashMap<String, String[]>();
private static final String[] com_sun_jersey_spi_HeaderDelegateProvider = new String[] {
"com.sun.jersey.core.impl.provider.header.LocaleProvider",
"com.sun.jersey.core.impl.provider.header.EntityTagProvider",
"com.sun.jersey.core.impl.provider.header.MediaTypeProvider",
"com.sun.jersey.core.impl.provider.header.CacheControlProvider",
"com.sun.jersey.core.impl.provider.header.NewCookieProvider",
"com.sun.jersey.core.impl.provider.header.CookieProvider",
"com.sun.jersey.core.impl.provider.header.URIProvider",
"com.sun.jersey.core.impl.provider.header.DateProvider",
"com.sun.jersey.core.impl.provider.header.StringProvider"
};
private static final String[] com_sun_jersey_spi_inject_InjectableProvider = new String[] {
"com.sun.jersey.core.impl.provider.xml.SAXParserContextProvider",
"com.sun.jersey.core.impl.provider.xml.XMLStreamReaderContextProvider",
"com.sun.jersey.core.impl.provider.xml.DocumentBuilderFactoryProvider",
"com.sun.jersey.core.impl.provider.xml.TransformerFactoryProvider"
};
private static final String[] javax_ws_rs_ext_MessageBodyReader = new String[] {
"com.sun.jersey.core.impl.provider.entity.StringProvider",
"com.sun.jersey.core.impl.provider.entity.ByteArrayProvider",
"com.sun.jersey.core.impl.provider.entity.FileProvider",
"com.sun.jersey.core.impl.provider.entity.InputStreamProvider",
"com.sun.jersey.core.impl.provider.entity.DataSourceProvider",
"com.sun.jersey.core.impl.provider.entity.RenderedImageProvider",
"com.sun.jersey.core.impl.provider.entity.MimeMultipartProvider",
"com.sun.jersey.core.impl.provider.entity.FormProvider",
"com.sun.jersey.core.impl.provider.entity.FormMultivaluedMapProvider",
"com.sun.jersey.core.impl.provider.entity.XMLRootElementProvider$App",
"com.sun.jersey.core.impl.provider.entity.XMLRootElementProvider$Text",
"com.sun.jersey.core.impl.provider.entity.XMLRootElementProvider$General",
"com.sun.jersey.core.impl.provider.entity.XMLJAXBElementProvider$App",
"com.sun.jersey.core.impl.provider.entity.XMLJAXBElementProvider$Text",
"com.sun.jersey.core.impl.provider.entity.XMLJAXBElementProvider$General",
"com.sun.jersey.core.impl.provider.entity.XMLListElementProvider$App",
"com.sun.jersey.core.impl.provider.entity.XMLListElementProvider$Text",
"com.sun.jersey.core.impl.provider.entity.XMLListElementProvider$General",
"com.sun.jersey.core.impl.provider.entity.ReaderProvider",
"com.sun.jersey.core.impl.provider.entity.DocumentProvider",
"com.sun.jersey.core.impl.provider.entity.SourceProvider$StreamSourceReader",
"com.sun.jersey.core.impl.provider.entity.SourceProvider$SAXSourceReader",
"com.sun.jersey.core.impl.provider.entity.SourceProvider$DOMSourceReader",
"com.sun.jersey.core.impl.provider.entity.XMLRootObjectProvider$App",
"com.sun.jersey.core.impl.provider.entity.XMLRootObjectProvider$Text",
"com.sun.jersey.core.impl.provider.entity.XMLRootObjectProvider$General",
"com.sun.jersey.core.impl.provider.entity.EntityHolderReader"
};
private static final String[] javax_ws_rs_ext_MessageBodyWriter = new String[] {
"com.sun.jersey.core.impl.provider.entity.StringProvider",
"com.sun.jersey.core.impl.provider.entity.ByteArrayProvider",
"com.sun.jersey.core.impl.provider.entity.FileProvider",
"com.sun.jersey.core.impl.provider.entity.InputStreamProvider",
"com.sun.jersey.core.impl.provider.entity.DataSourceProvider",
"com.sun.jersey.core.impl.provider.entity.RenderedImageProvider",
"com.sun.jersey.core.impl.provider.entity.MimeMultipartProvider",
"com.sun.jersey.core.impl.provider.entity.FormProvider",
"com.sun.jersey.core.impl.provider.entity.FormMultivaluedMapProvider",
"com.sun.jersey.core.impl.provider.entity.XMLRootElementProvider$App",
"com.sun.jersey.core.impl.provider.entity.XMLRootElementProvider$Text",
"com.sun.jersey.core.impl.provider.entity.XMLRootElementProvider$General",
"com.sun.jersey.core.impl.provider.entity.XMLJAXBElementProvider$App",
"com.sun.jersey.core.impl.provider.entity.XMLJAXBElementProvider$Text",
"com.sun.jersey.core.impl.provider.entity.XMLJAXBElementProvider$General",
"com.sun.jersey.core.impl.provider.entity.XMLListElementProvider$App",
"com.sun.jersey.core.impl.provider.entity.XMLListElementProvider$Text",
"com.sun.jersey.core.impl.provider.entity.XMLListElementProvider$General",
"com.sun.jersey.core.impl.provider.entity.ReaderProvider",
"com.sun.jersey.core.impl.provider.entity.DocumentProvider",
"com.sun.jersey.core.impl.provider.entity.StreamingOutputProvider",
"com.sun.jersey.core.impl.provider.entity.SourceProvider$SourceWriter"
};
static
{
SERVICES.put("com.sun.jersey.spi.HeaderDelegateProvider",
com_sun_jersey_spi_HeaderDelegateProvider);
SERVICES.put("com.sun.jersey.spi.inject.InjectableProvider",
com_sun_jersey_spi_inject_InjectableProvider);
SERVICES.put("javax.ws.rs.ext.MessageBodyReader", javax_ws_rs_ext_MessageBodyReader);
SERVICES.put("javax.ws.rs.ext.MessageBodyWriter", javax_ws_rs_ext_MessageBodyWriter);
}
@SuppressWarnings("unchecked")
@Override
public Iterator<Class<T>> createClassIterator(Class<T> service, String serviceName,
ClassLoader loader, boolean ignoreOnClassNotFound)
{
String[] classesNames = SERVICES.get(serviceName);
int length = classesNames.length;
ArrayList<Class<T>> classes = new ArrayList<Class<T>>(length);
for (int i = 0; i < length; i++)
{
try
{
classes.add((Class<T>) Class.forName(classesNames[i]));
} catch (ClassNotFoundException e)
{
e.printStackTrace();
}
}
return null;
}
@Override
public Iterator<T> createIterator(Class<T> service, String serviceName, ClassLoader loader,
boolean ignoreOnClassNotFound)
{
String[] classesNames = SERVICES.get(serviceName);
int length = classesNames.length;
ArrayList<T> classes = new ArrayList<T>(length);
for (int i = 0; i < length; i++)
{
try
{
classes.add(service.cast(Class.forName(classesNames[i]).newInstance()));
} catch (IllegalAccessException e)
{
e.printStackTrace();
} catch (InstantiationException e)
{
e.printStackTrace();
} catch (ClassNotFoundException e)
{
e.printStackTrace();
}
}
return classes.iterator();
}
}
可以这样使用：
// ...
Client client = Client.create();
// ...
ServiceFinder.setIteratorProvider(new YourOwnServiceIteratorProvider());
// ...
HTH