ccc.client.gwt.core.GWTRequestExecutor.java Source code

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Here is the source code for ccc.client.gwt.core.GWTRequestExecutor.java

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/*-----------------------------------------------------------------------------
 * Copyright (c) 2009 Civic Computing Ltd.
 * All rights reserved.
 *
 * This file is part of Content Control.
 *
 * Content Control is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Content Control 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Content Control.  If not, see http://www.gnu.org/licenses/.
 *
 * Revision      $Rev: 2636 $
 * Modified by   $Author: keith $
 * Modified on   $Date: 2010-04-09 14:56:56 +0100 (Fri, 09 Apr 2010) $
 *
 * Changes: see subversion log.
 *-----------------------------------------------------------------------------
 */
package ccc.client.gwt.core;

import ccc.client.core.HttpMethod;
import ccc.client.core.InternalServices;
import ccc.client.core.Request;
import ccc.client.core.RequestExecutor;
import ccc.client.core.ResponseHandler;

import com.google.gwt.core.client.GWT;
import com.google.gwt.http.client.RequestBuilder;
import com.google.gwt.http.client.RequestException;
import com.google.gwt.http.client.RequestBuilder.Method;

/**
 * GWT implementation of the {@link RequestExecutor} interface.
 *
 * @author Civic Computing Ltd.
 */
class GWTRequestExecutor implements RequestExecutor {

    /** {@inheritDoc} */
    @Override
    public void invokeRequest(final Request request) {

        final ResponseHandler handler = request.getCallback();

        final String url = InternalServices.globals.appURL() + request.getPath();
        final RequestBuilder builder = new RequestBuilder(getMethod(request.getMethod()), url);

        builder.setHeader("Accept", "application/json");
        builder.setHeader(HttpMethod.OVERRIDE_HEADER, request.getMethod().toString());

        if (HttpMethod.POST.equals(request.getMethod()) || HttpMethod.PUT.equals(request.getMethod())) {
            builder.setHeader("Content-Type", "application/json");
            builder.setRequestData(request.getBody());
        }

        builder.setCallback(new GWTRequestCallback(handler));

        try {
            builder.send();
            GWT.log("Sent request: " + request.getMethod() + " " + url, null);
        } catch (final RequestException e) {
            handler.onFailed(e);
        }
    }

    private Method getMethod(final HttpMethod method) {
        switch (method) {
        case GET:
            return RequestBuilder.GET;
        case POST:
            return RequestBuilder.POST;
        case PUT:
            return RequestBuilder.POST;
        case DELETE:
            return RequestBuilder.POST;
        default:
            throw new IllegalArgumentException("Unsupported HTTP method: " + method);
        }
    }
}