br.com.pegasus.solutions.smartgwt.lib.client.view.impl.util.HttpRequestUtil.java Source code

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/*
 * Copyright 2015 Pegasus Solutions
 * @author Rafael Peres dos Santos
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by
 * applicable law or agreed to in writing, software distributed under the
 * License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS
 * OF ANY KIND, either express or implied. See the License for the specific
 * language governing permissions and limitations under the License.
 *
 * ================================================================================
 *
 * Direitos autorais 2015 Pegasus Solutions
 * @author Rafael Peres dos Santos
 * 
 * Licenciado sob a Licena Apache, Verso 2.0 ("LICENA"); voc no pode usar
 * esse arquivo exceto em conformidade com a esta LICENA. Voc pode obter uma
 * cpia desta LICENA em http://www.apache.org/licenses/LICENSE-2.0 A menos que
 * haja exigncia legal ou acordo por escrito, a distribuio de software sob
 * esta LICENA se dar COMO EST??, SEM GARANTIAS OU CONDIES DE QUALQUER
 * TIPO, sejam expressas ou tcitas. Veja a LICENA para a redao especfica a
 * reger permisses e limitaes sob esta LICENA.
 *
 */
package br.com.pegasus.solutions.smartgwt.lib.client.view.impl.util;

import br.com.pegasus.solutions.smartgwt.lib.client.util.StringUtil;
import br.com.pegasus.solutions.smartgwt.lib.client.view.api.events.IRequestBuilderFailedAction;
import br.com.pegasus.solutions.smartgwt.lib.client.view.api.events.IRequestBuilderSucessAction;

import com.google.gwt.core.client.GWT;
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;
import com.google.gwt.user.client.Window;

public final class HttpRequestUtil {

    private HttpRequestUtil() {
    }

    /**
     * open windown
     * 
     * @param url {@link String}
     * @param name {@link String}
     * @return void
     */
    public static void openWindow(String url, String name) {
        Window.open(url, name, null);
    }

    /**
     * open windown
     * 
     * @param servlet {@link String}
     * @param params {@link String}
     * @param name {@link String}
     * @return void
     */
    public static void openWindow(String servlet, String params, String name) {
        String url = "";
        if (!StringUtil.isEmpty(servlet)) {
            url = servlet;
            if (!StringUtil.isEmpty(params)) {
                url = url + "?" + params;
            }
        } else if (!StringUtil.isEmpty(params)) {
            url = url + params;
        }

        openWindow(GWT.getModuleBaseURL() + url, name);
    }

    /**
     * make servlet request
     * 
     * @param servletName {@link String}
     * @param params {@link String}
     * @param iRequestBuilderSucessAction {@link IRequestBuilderFailedAction}
     * @param iFailedAction {@link IRequestBuilderFailedAction}
     * @throws RequestException
     * @return void
     */
    public static void doPostServletRequest(String servletName, String params,
            final IRequestBuilderSucessAction iRequestBuilderSucessAction,
            final IRequestBuilderFailedAction iFailedAction) throws RequestException {

        doRequest(iRequestBuilderSucessAction, iFailedAction, GWT.getModuleBaseURL() + servletName, params,
                RequestBuilder.POST);
    }

    /**
     * do request
     * 
     * @param servletName {@link String}
     * @param params {@link String}
     * @param iRequestBuilderSucessAction {@link IRequestBuilderFailedAction}
     * @param iFailedAction {@link IRequestBuilderFailedAction}
     * @throws RequestException
     * @return void
     */
    private static void doRequest(final IRequestBuilderSucessAction iRequestBuilderSucessAction,
            final IRequestBuilderFailedAction iFailedAction, String url, String params,
            RequestBuilder.Method method) throws RequestException {

        RequestBuilder requestBuilder = new RequestBuilder(method, url);
        requestBuilder.setHeader("Content-type", "application/x-www-form-urlencoded");
        requestBuilder.sendRequest(params, new RequestCallback() {
            public void onResponseReceived(Request request, Response response) {
                if (200 == response.getStatusCode() && iRequestBuilderSucessAction != null) {
                    iRequestBuilderSucessAction.executeAction(request, response);
                }
            }

            public void onError(Request request, Throwable exception) {
                if (iFailedAction != null) {
                    iFailedAction.executeAction(request, exception);
                } else {
                    MessageUtil.showError(exception.getMessage());
                }
            }
        });
    }
}