Thanks. That was a big help. Ultimately, I am trying to pass XML. The
following worked for me:
Client:
public void onClick(ClickEvent event) {
JsonpRequestBuilder jsonprb= new JsonpRequestBuilder();
jsonprb.requestString("http://localhost:8084/Arahant/GWTServlet";,
new AsyncCallback<String>() {
@Override
public void onFailure(Throwable caught) {
Window.alert("Failure getting JSONP directly from
remote server");
}
@Override
public void onSuccess(String result) {
Window.alert("Got " + result);
}
});
Server:
protected void processRequest(HttpServletRequest request,
HttpServletResponse response)
throws ServletException, IOException {
String callback = request.getParameter("callback");
PrintWriter out = response.getWriter();
try {
out.print(callback + "(\"Hello there\")");
} finally {
out.close();
}
}
I figure I'll stick XML in the string.
On Mon, Mar 26, 2012 at 3:54 AM, Thomas Broyer <[email protected]> wrote:
> Your server sends an array with a single item being an element with a
> "Hello" property, so your client code should use an
> AsyncCallback<JsArray<X>> where X is some JavaScriptObject subclass with a
> JSNI method getting the "Hello" property
>
> class X extends JavaScriptObject {
> protected X() { /* required by JSO */ }
>
> public final native String getHello() /*-{ return this.Hello; }-*/;
> }
>
> ...
>
> jsonprb.requestObject(url, new AsyncCallback<JsArray<X>>() {
> @Override
> public void onSuccess(JsArray<X> result) {
> X firstX = result.get(0);
> Window.alert("Hello " + firstX.getHello());
> }
> ...
> }
>
> On Monday, March 26, 2012 4:05:42 AM UTC+2, Blake wrote:
>
>> Greetings,
>>
>> I have a GWT app talking to a Java servlet just fine except I can't seem
>> to pass data. I've already spent a day on it. Any help would be greatly
>> appreciated.
>>
>> I am using JsonpRequestBuilder and attempting to get around SOP. Here
>> is my server code:
>>
>> public class GWTServlet extends HttpServlet {
>> protected void processRequest(HttpServletRequest request,
>> HttpServletResponse response)
>> throws ServletException, IOException {
>> String callback = request.getParameter("callback");
>> PrintWriter out = response.getWriter();
>> try {
>> out.print(callback + "([{\"Hello\": \"world\"}]);");
>> } finally {
>> out.close();
>> }
>> }....
>>
>> Here is my GWT code:
>>
>> public void onClick(ClickEvent event) {
>>
>> JsonpRequestBuilder jsonprb= new JsonpRequestBuilder();
>>
>>
>> jsonprb.requestObject("http://localhost:8084/XXX/GWTServlet<http://localhost:8084/XXX/GWTServlet>
>> ",
>>
>> new AsyncCallback() {
>>
>> @Override
>>
>> public void onFailure(Throwable caught) {
>>
>> Window.alert("Failure getting JSONP directly from
>> remote server");
>>
>> }
>>
>>
>> @Override
>>
>> public void onSuccess(Object result) {
>>
>> Window.alert("Got response");
>>
>> JavaScriptObject res = (JavaScriptObject) result;
>>
>> Window.alert(res.toSource());
>>
>> }
>>
>> });
>>
>>
>> I get the "Got response" message. I am also able to put break points on
>> the frontend or backend and it gets to where I expect. The problem is that
>> I can't seem to get at the data send from the server. I don't know what to
>> do in onSuccess().
>>
>> Of course, once I get this working I will have the same challenge going
>> the other way. Help is greatly appreciated.
>>
>> Blake McBride
>>
>>
>> --
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