package org.argeo.eclipse.ui.specific; import java.net.URL; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; import org.eclipse.rwt.RWT; import org.eclipse.rwt.service.IServiceHandler; import org.eclipse.rwt.service.IServiceManager; import org.eclipse.ui.PlatformUI; /** * RAP SPECIFIC handler to enable the opening of a download dialog box triggered * by whatever action in the UI * * Manages the registration of the effective DownloadServiceHandler at * instantiation time. * * Manages the process of forwarding the request to the handler at runtime to * open the dialog box * * @author bsinou * */ public class FileHandler { private final static Log log = LogFactory.getLog(FileHandler.class); public FileHandler(FileProvider provider) { // Instantiate and register the DownloadServicHandler. IServiceManager manager = RWT.getServiceManager(); IServiceHandler handler = new DownloadServiceHandler(provider); manager.registerServiceHandler("downloadServiceHandler", handler); } public void openFile(String fileName, String fileId) { // See RAP FAQ: // http://wiki.eclipse.org/RAP/FAQ#How_to_provide_download_link.3F // And forum discussion : // http://www.eclipse.org/forums/index.php?t=msg&th=205487&start=0&S=43d85dacc88b505402420592109c7240 try { if (log.isDebugEnabled()) log.debug("URL : " + createFullDownloadUrl(fileName, fileId)); URL url = new URL(createFullDownloadUrl(fileName, fileId)); PlatformUI.getWorkbench().getBrowserSupport() .createBrowser("DownloadDialog").openURL(url); } catch (Exception e) { e.printStackTrace(); } // These lines are useless in the current use case but might be // necessary with new browsers. Stored here for memo // response.setContentType("application/force-download"); // response.setHeader("Content-Disposition", contentDisposition); // response.setHeader("Content-Transfer-Encoding", "binary"); // response.setHeader("Pragma", "no-cache"); // response.setHeader("Cache-Control", "no-cache, must-revalidate"); } private String createFullDownloadUrl(String fileName, String fileId) { StringBuilder url = new StringBuilder(); url.append(RWT.getRequest().getRequestURL()); url.append(createParamUrl(fileName, fileId)); return url.toString(); } private String createParamUrl(String filename, String fileId) { StringBuilder url = new StringBuilder(); url.append("?"); url.append(IServiceHandler.REQUEST_PARAM); url.append("=downloadServiceHandler"); url.append("&filename="); url.append(filename); url.append("&fileid="); url.append(fileId); String encodedURL = RWT.getResponse().encodeURL(url.toString()); return encodedURL; } }