I have still difficulties with RPC call in a gadget. In hosted mode it
works again, but not in iGoogle.
Here is my Code:
package com.google.gwt.sample.cnsnews_rpc_gadget.client;
import java.io.Serializable;
import com.google.gwt.sample.cnsnews_rpc_gadget.client.FakeResponse;
import com.google.gwt.sample.cnsnews_rpc_gadget.client.GadgetResponse;
import com.google.gwt.core.client.GWT;
import com.google.gwt.gadgets.client.Gadget;
import com.google.gwt.gadgets.client.IntrinsicFeature;
import com.google.gwt.gadgets.client.NeedsIntrinsics;
import com.google.gwt.gadgets.client.Gadget.ModulePrefs;
import com.google.gwt.http.client.RequestBuilder;
import com.google.gwt.http.client.RequestCallback;
import com.google.gwt.user.client.Window;
import com.google.gwt.user.client.rpc.AsyncCallback;
import com.google.gwt.user.client.rpc.ServiceDefTarget;
import com.google.gwt.user.client.ui.HTML;
import com.google.gwt.user.client.ui.Label;
import com.google.gwt.user.client.ui.RootPanel;
@ModulePrefs(title = "CADENAS News", author = "mr")
public class CADENASNews_RPC_Gadget extends Gadget<NewsPreferences>
implements NeedsIntrinsics, AsyncCallback<String>
{
IntrinsicFeature intrinsicMethods;
private final static GadgetServiceAsync gadgetService =
(GadgetServiceAsync) GWT.create(GadgetService.class);
static {
disableStats();
}
private static native void disableStats() /*-{
$wnd.$stats = null;
}-*/;
public void initializeFeature(IntrinsicFeature feature) {
this.intrinsicMethods=feature;
}
public void init(NewsPreferences preferences) {
ServiceDefTarget serviceDef = (ServiceDefTarget) gadgetService;
String rpcUrl = serviceDef.getServiceEntryPoint();
rpcUrl = intrinsicMethods.getCachedUrl(rpcUrl);
String protocol = rpcUrl.substring(0, rpcUrl.indexOf(':'));
String file = rpcUrl.substring(rpcUrl.indexOf('/',
rpcUrl.indexOf
(':')+3));
serviceDef.setServiceEntryPoint(protocol+"://"+ getDomain() +
file);
RequestBuilder requestBuilder = gadgetService.getXML
(CADENASNews_RPC_Gadget.this);
String url = requestBuilder.getUrl();
makeGetRequest(url, requestBuilder.getRequestData(),
requestBuilder.getCallback());
}
private static native String getDomain() /*-{
return $wnd.document.domain;
}-*/;
public void onFailure(Throwable caught) {
Label lbl2 = new HTML(caught.getLocalizedMessage());
RootPanel.get().add(lbl2);
}
public void onSuccess(String result) {
Label lbl = new HTML(result);
RootPanel.get().add(lbl);
}
private native void makeGetRequest(String url, String postdata,
RequestCallback callback) /*-{
var params = {};
params[$wnd.gadgets.io.RequestParameters.METHOD] =
$wnd.gadgets.io.MethodType.GET;
params[$wnd.gadgets.io.RequestParameters.POST_DATA]= postdata;
$wnd.gadgets.io.makeRequest(url, response, params);
function response(obj) {
@com.google.gwt.sample.cnsnews_rpc_gadget.client.CADENASNews_RPC_Gadget::onSuccessInternal
(Lcom/google/gwt/sample/cnsnews_rpc_gadget/client/GadgetResponse;Lcom/
google/gwt/http/client/RequestCallback;)(obj, callback);
};
}-*/;
static void onSuccessInternal(final GadgetResponse response,
RequestCallback callback) {
try {
String responseText = response.getText();
callback.onResponseReceived(null, new
FakeResponse(response));
} catch (Exception e) {
callback.onError(null, e);
}
}
}
Does anyone know what's wrong here?
On 3 Dez., 15:03, flokay <f.kar...@cadenas.de> wrote:
> Now if I want to make the rpc call the "onFailureMethod" is invoked
> and the error message:
>
> "unable to initiate the asynchronous service invocation -- check the
> network connection"
>
> What could be wrong here?
>
> On 1 Dez., 17:14, Eric Ayers <zun...@google.com> wrote:
>
> > This may be a conflict between different versions of xerces, because this
> > part of the code is creating a new XML document. You should be using the
> > -noredist.jar file, and expecting to resolve xerces in your GWT build. Are
> > you explicitly including xerces in your build classpath?
>
> > It may help to checkout the gwt-gadgets project from code and build a fresh
> > .jar along with the version of GWT and xerces you are using.
>
> > On Tue, Dec 1, 2009 at 10:37 AM, flokay <f.kar...@cadenas.de> wrote:
> > > OK thanks!
>
> > > So I have made it with RPC now and inhostedmode, itworkswell
> > > again!
> > > But if I want to change it in a gadget the compiler writes the
> > > following error message:
>
> > > Compiling module
> > > com.google.gwt.sample.cnsnews_rpc_gadget.CADENASNews_RPC_Gadget
> > > Computing all possible rebind results for
> > > 'com.google.gwt.sample.cnsnews_rpc_gadget.client.CADENASNews_RPC_Gadget'
> > > Rebinding
> > > com.google.gwt.sample.cnsnews_rpc_gadget.client.CADENASNews_RPC_Gadget
> > > Invoking <generate-with
> > > class='com.google.gwt.gadgets.rebind.GadgetGenerator'/>
> > > [ERROR] Generator
> > > 'com.google.gwt.gadgets.rebind.GadgetGenerator' threw threw an
> > > exception while rebinding
> > > 'com.google.gwt.sample.cnsnews_rpc_gadget.client.CADENASNews_RPC_Gadget'
> > > java.lang.NullPointerException
> > > at
> > > com.google.gwt.gadgets.rebind.GadgetGenerator.generateGadgetManifest
> > > (GadgetGenerator.java:274)
> > > at com.google.gwt.gadgets.rebind.GadgetGenerator.generate
> > > (GadgetGenerator.java:142)
> > > at com.google.gwt.dev.cfg.RuleGenerateWith.realize
> > > (RuleGenerateWith.java:49)
> > > at com.google.gwt.dev.shell.StandardRebindOracle$Rebinder.tryRebind
> > > (StandardRebindOracle.java:113)
> > > at com.google.gwt.dev.shell.StandardRebindOracle$Rebinder.rebind
> > > (StandardRebindOracle.java:62)
> > > at com.google.gwt.dev.shell.StandardRebindOracle.rebind
> > > (StandardRebindOracle.java:172)
> > > at com.google.gwt.dev.shell.StandardRebindOracle.rebind
> > > (StandardRebindOracle.java:161)
> > > at com.google.gwt.dev.Precompile
> > > $DistillerRebindPermutationOracle.getAllPossibleRebindAnswers
> > > (Precompile.java:204)
> > > at com.google.gwt.dev.jjs.JavaToJavaScriptCompiler.precompile
> > > (JavaToJavaScriptCompiler.java:250)
> > > at com.google.gwt.dev.Precompile.precompile(Precompile.java:300)
> > > at com.google.gwt.dev.Compiler.run(Compiler.java:170)
> > > at com.google.gwt.dev.Compiler$1.run(Compiler.java:124)
> > > at
> > > com.google.gwt.dev.CompileTaskRunner.doRun(CompileTaskRunner.java:
> > > 88)
> > > at com.google.gwt.dev.CompileTaskRunner.runWithAppropriateLogger
> > > (CompileTaskRunner.java:82)
> > > at com.google.gwt.dev.Compiler.main(Compiler.java:131)
>
> > > I'm already using the gwt-gadgets-noredist.jar file!
> > > Any suggestions?
>
> > > On 30 Nov., 17:52, Eric Ayers <zun...@google.com> wrote:
> > > > See the Gadget RPC example in the gwt-google-apis project for how to
> > > > set
> > > > the proxy in request builder.
>
> > > >http://code.google.com/p/gwt-google-apis
>
> > > > On Mon, Nov 30, 2009 at 10:17 AM, flokay <f.kar...@cadenas.de> wrote:
> > > > > Hi,
>
> > > > > I've got an issue with my Google Gadget:
> > > > > - I'm trying to read an XML file via RequestBuilder and show it in the
> > > > > gadget (only for testing purpose)
> > > > > - If I try it inhostedmodewith "onModuleLoad()" method and so on,
> > > > > itworkswell
> > > > > - But if i add it to iGoogle the string variable of response.getText()
> > > > > is empty in Firefox and in IE there appears the following message:
> > > > > "...url.. is invalid or violates the same-origin security restriction"
> > > > > - My XML file from which should be read is exactly in the same
> > > > > directory as my gadget XML file, so there actually couldn't be a same-
> > > > > origin security restriction.
>
> > > > > - I'm using GWT 1.7.1!
>
> > > > > I've tried to fix this since over a week now and I don't know what
> > > > > else to do!
> > > > > Could anbody help me?
>
> > > > > Best regards,
>
> > > > > flokay
>
> > > > > --
>
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>
> > > > --
> > > > Eric Z. Ayers
> > > > Google Web Toolkit, Atlanta, GA USA
>
> > > --
>
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>
> > --
> > Eric Z. Ayers
> > Google Web Toolkit, Atlanta, GA USA
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