Verwenden von GWT RequestBuilder zum Überprüfen der Passwortstärke mit Google

Question

Nominell kann die URL http://www.google.com/accounts/RatePassword?Passwd=aaaaa verwendet werden, um die Stärke des Passworts aaaaa zu überprüfen. Ich versuche, es in meinem GWT-System zu verwenden, indem ich eine RequestBuilder verwende, um den Wert zu erhalten, der zwischen 1 und 4 sein kann, aber ich bekomme den Wert nicht. Kann jemand erraten, was das Problem ist?

RequestBuilder builder = new RequestBuilder(RequestBuilder.GET, 
    "http://www.google.com/accounts/RatePassword?Passwd=aaaaa"); 

    try { 
     Request response = builder.sendRequest(null, new RequestCallback() { 
     public void onError(Request request, Throwable exception) { 
      //error 
     } 

     public void onResponseReceived(Request request, Response response) { 
      Window.alert(""+response.getText()); 
     } 
     }); 
    } catch (RequestException e) { 
     // Code omitted for clarity 
    } 

Ich tue dies:

class PasswordStrength extends JavaScriptObject { 

      protected PasswordStrength() {} 

     public final native String getRating() /*-{ 
      return this.rating; 
     }-*/; 
    } 

JsonpRequestBuilder builder = new JsonpRequestBuilder(); 

    builder.requestObject(URL.encode(
       "https://www.google.com/accounts/RatePassword?Passwd=aaa"), 
       new AsyncCallback <PasswordStrength>(){ 

     @Override 
     public void onFailure(Throwable caught) { 
      // TODO Auto-generated method stub 
      Window.alert("Error"); 
     } 

     @Override 
     public void onSuccess(PasswordStrength result) { 
      // TODO Auto-generated method stub 
      Window.alert("NotError"); 
     }}); 

Aber ich bin immer diese Fehlermeldung:

java.lang.ClassFormatError: Illegal method name "<init>$" in class com/BiddingSystem/client/BiddingSystem$1PasswordStrength 
    at java.lang.ClassLoader.defineClass1(Native Method) 
    at java.lang.ClassLoader.defineClassCond(ClassLoader.java:632) 
    at java.lang.ClassLoader.defineClass(ClassLoader.java:616) 
    at java.lang.ClassLoader.defineClass(ClassLoader.java:466) 
    at com.google.gwt.dev.shell.CompilingClassLoader.findClass(CompilingClassLoader.java:1011) 
    at java.lang.ClassLoader.loadClass(ClassLoader.java:307) 
    at java.lang.ClassLoader.loadClass(ClassLoader.java:248) 
    at com.BiddingSystem.client.BiddingSystem$1.onSuccess(BiddingSystem.java:1) 
    at com.google.gwt.jsonp.client.JsonpRequest.onSuccess(JsonpRequest.java:201) 
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) 
    at java.lang.reflect.Method.invoke(Method.java:597) 
    at com.google.gwt.dev.shell.MethodAdaptor.invoke(MethodAdaptor.java:103) 
    at com.google.gwt.dev.shell.MethodDispatch.invoke(MethodDispatch.java:71) 
    at com.google.gwt.dev.shell.OophmSessionHandler.invoke(OophmSessionHandler.java:157) 
    at com.google.gwt.dev.shell.BrowserChannelServer.reactToMessagesWhileWaitingForReturn(BrowserChannelServer.java:326) 
    at com.google.gwt.dev.shell.BrowserChannelServer.invokeJavascript(BrowserChannelServer.java:207) 
    at com.google.gwt.dev.shell.ModuleSpaceOOPHM.doInvoke(ModuleSpaceOOPHM.java:126) 
    at com.google.gwt.dev.shell.ModuleSpace.invokeNative(ModuleSpace.java:561) 
    at com.google.gwt.dev.shell.ModuleSpace.invokeNativeObject(ModuleSpace.java:269) 
    at com.google.gwt.dev.shell.JavaScriptHost.invokeNativeObject(JavaScriptHost.java:91) 
    at com.google.gwt.core.client.impl.Impl.apply(Impl.java) 
    at com.google.gwt.core.client.impl.Impl.entry0(Impl.java:214) 
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) 
    at java.lang.reflect.Method.invoke(Method.java:597) 
    at com.google.gwt.dev.shell.MethodAdaptor.invoke(MethodAdaptor.java:103) 
    at com.google.gwt.dev.shell.MethodDispatch.invoke(MethodDispatch.java:71) 
    at com.google.gwt.dev.shell.OophmSessionHandler.invoke(OophmSessionHandler.java:157) 
    at com.google.gwt.dev.shell.BrowserChannelServer.reactToMessages(BrowserChannelServer.java:281) 
    at com.google.gwt.dev.shell.BrowserChannelServer.processConnection(BrowserChannelServer.java:531) 
    at com.google.gwt.dev.shell.BrowserChannelServer.run(BrowserChannelServer.java:352) 
    at java.lang.Thread.run(Thread.java:662) 

Answer 1

Wir es die folgende Art und Weise (ui Details weggelassen) verwenden:

public class PasswordStrengthWidget extends Composite { 

    private static class PasswordStrength extends JavaScriptObject { 

     protected PasswordStrength() {} 

     public final native String getRating() /*-{ 
      return this.rating; 
     }-*/; 
    } 

    private static final String RATING_URL = URL.encode("https://www.google.com/accounts/RatePassword?Passwd="); 
    private static final String[] STRENGTH = {"very weak", "weak", "medium", "strong"}; 
    @UiField 
    Label indicator; 
    private PasswordTextBox fPassword; 

    ... 

    private void updateStrengthIndicator() { 
     JsonpRequestBuilder request = new JsonpRequestBuilder(); 
     request.requestObject(RATING_URL + fPassword.getText(), new AsyncCallback<PasswordStrength>() { 

      @Override 
      public void onSuccess(PasswordStrength result) { 
       indicator.setText(STRENGTH[Integer.parseInt(result.getRating()) - 1] + result.getRating()); 
      } 

      @Override 
      public void onFailure(Throwable caught) { 
       indicator.setText("error calculating strength"); 
      } 
     }); 
    } 
} 

Stellen Sie sicher, dass Sie diese Zeile hinzufügen auf Ihre module.xml:

<inherits name='com.google.gwt.jsonp.Jsonp' />