The response comes async.
When the response from the server arrives at the client the method
onResponseReceived in the RequestCallback object is called, if an
error hapens the the onErrormethod is called.
The RequestCallback object is the second parameter in the sendRequest
function call.
public void onResponseReceived(Request
request, Response response)
{
if (response.getStatusCode()
== 200 || response.getStatusCode()
== 304)
{
JavaScriptObject
responseData =
JsonHelper.stringToJso(response.getText()).cast());
// use the response
}
else
{
// invalid response
}
}
@Override
public void onError(Request request,
Throwable exception) {
// error on the resquest
}
});
On 5 jul, 15:01, Ahmed Shoeib <ahmedelsayed.sho...@gmail.com> wrote:
> you told me how to send request from client to server
>
> now i want how yo get data from server to use it in client
>
> and the data in json
>
> On Jul 5, 8:12 pm, André Moraes <andr...@gmail.com> wrote:
>
>
>
> > This code is quite simple
>
> > The line:
>
> > re = rb.sendRequest("jsonrpc-call=" + JsonHelper.jsoToString(call),
> > new RequestCallback()
>
> > prepare a AJAX call to the server and make your javascript object to a
> > string using JsonHelper.jsoToString.
> > In ther server the json-string will be accessible by the parameter
> > "jsonrpc-call".
>
> > The line:
>
> > if (response.getStatusCode()
> > == 200 || response.getStatusCode()
> > == 304)
> > {
> > JavaScriptObject
> > responseData =
> > JsonHelper.stringToJso(response.getText()).cast());
> > // use the response
> > }
>
> > get the response wrote by the server and make i availabe as a
> > JavaScriptObject.
>
> > You can use the JSONObject class to populate and read a
> > JavaScriptObject.
>
> > You can read more about JSON + GWT at:
>
> >http://code.google.com/intl/webtoolkit/webtoolkit/doc/latest/DevGuide...
> > andhttp://code.google.com/intl/webtoolkit/webtoolkit/articles/using_gwt_...
> > On 5 jul, 12:50, Ahmed Shoeib <ahmedelsayed.sho...@gmail.com> wrote:
>
> > > i want a simple example to describe it
> > > cause i need it as soon as possible
>
> > > On Jul 5, 6:18 pm, André Moraes <andr...@gmail.com> wrote:
>
> > > > re = rb.sendRequest("jsonrpc-call=" +
> > > > JsonHelper.jsoToString(call),
> > > > new RequestCallback() {
>
> > > > @Override
> > > > public void onResponseReceived(Request
> > > > request, Response response)
> > > > {
> > > > if (response.getStatusCode() ==
> > > > 200 || response.getStatusCode()
> > > > == 304)
> > > > {
> > > > JavaScriptObject
> > > > responseData =
> > > > JsonHelper.stringToJso(response.getText()).cast());
> > > > // use the response
> > > > }
> > > > else
> > > > {
> > > > // invalid response
> > > > }
> > > > }
>
> > > > @Override
> > > > public void onError(Request request,
> > > > Throwable exception) {
> > > > // error on the resquest
> > > > }
> > > > });
>
> > > > public class JsonHelper {
>
> > > > public static String jsoToString(JavaScriptObject jso) {
> > > > if (isJsonLibraryDefined()) {
> > > > return _jsoToString(jso);
> > > > } else {
> > > > return new JSONObject(jso).toString();
> > > > }
> > > > }
>
> > > > public static JavaScriptObject stringToJso(String value) {
> > > > if (isJsonLibraryDefined()) {
> > > > return _stringToJso(value);
> > > > } else {
> > > > return _stringToJsoEval(value);
> > > > }
> > > > }
>
> > > > public static native String _jsoToString(JavaScriptObject jso)
> > > > /*-{
> > > > return JSON.stringify(jso);
> > > > }-*/;
>
> > > > public static native JavaScriptObject _stringToJso(String
> > > > string) /*-
> > > > {
> > > > return JSON.parse(string);
> > > > }-*/;
>
> > > > public static native JavaScriptObject _stringToJsoEval(String
> > > > string) /*-{
> > > > return eval("(" + string + ")");
> > > > }-*/;
>
> > > > public static native boolean isJsonLibraryDefined() /*-{
> > > > return typeof(JSON) != 'undefined'
> > > > && typeof(JSON.parse) != 'undefined'
> > > > && typeof(JSON.stringify) != 'undefined';
> > > > }-*/;
>
> > > > }
>
> > > > The JsonHelper class handle the conversion to and from JSON.
>
> > > > If possible use the json.org javascript library that implements the
> > > > functions JSON.parse / JSON.stringify
>
> > > > I am currently writing a project that encapsulates that library and
> > > > make it more easier to use than this JsonHelper class.
>
> > > > When i release it in google-code I let you know.
>
> > > > Hope it helps.
>
> > > > On 5 jul, 09:01, Ahmed Shoeib <ahmedelsayed.sho...@gmail.com> wrote:
>
> > > > > Dear Friends ,
>
> > > > > i face a problem when trying to send and receive json object between
> > > > > client and server in GWT application
>
> > > > > so i want a simple example that show me how to do this
>
> > > > > Thanks,
> > > > > ahmed shoeib
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