/**********************************************
* Copyright (C) 2010 Lukas Laag
* This file is part of lib-gwt-svg.
*
* libgwtsvg is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* libgwtsvg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with libgwtsvg. If not, see http://www.gnu.org/licenses/
**********************************************/
package org.vectomatic.dom.svg.utils;
import org.vectomatic.dom.svg.impl.SVGParserImpl;
import org.vectomatic.dom.svg.utils.DOMHelper;
import com.google.gwt.core.client.GWT;
import com.google.gwt.dom.client.Element;
import com.google.gwt.http.client.Request;
import com.google.gwt.http.client.RequestBuilder;
import com.google.gwt.http.client.RequestCallback;
import com.google.gwt.http.client.RequestException;
import com.google.gwt.http.client.Response;
/**
* Implementation of the AsyncXmlLoader based on RequestBuilder.
*/
public class HttpRequestXmlLoader implements AsyncXmlLoader {
@Override
public void loadResource(final String resourceUrl, final AsyncXmlLoaderCallback callback) {
String currentResourceUrl = resourceUrl + ((resourceUrl.indexOf("?") == -1) ? ("?ts=" + System.currentTimeMillis()) : ("&ts=" + + System.currentTimeMillis()));
RequestBuilder requestBuilder = new RequestBuilder(RequestBuilder.GET, currentResourceUrl);
requestBuilder.setCallback(new RequestCallback() {
public void onError(Request request, Throwable exception) {
callback.onError(resourceUrl, exception);
}
private void onSuccess(Request request, Response response) {
SVGParserImpl impl = GWT.create(SVGParserImpl.class);
Element root = impl.parse(response.getText());
callback.onSuccess(resourceUrl, root);
}
public void onResponseReceived(Request request, Response response) {
if (response.getStatusCode() == Response.SC_OK) {
onSuccess(request, response);
} else {
onError(request, null);
}
}
});
try {
requestBuilder.send();
} catch (RequestException e) {
GWT.log("Cannot fetch " + resourceUrl, e);
}
}
}