+/*
+ * Copyright (C) 2007-2012 Mathieu Baudier
+ *
+ * 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.
+ */
package org.argeo.eclipse.ui.specific;
-import java.io.File;
-import java.io.InputStream;
+import java.net.URL;
-//import org.argeo.eclipse.ui.dialogs.Error;
+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
+ *
+ */
public class FileHandler {
+ public final static String FORCED_DOWNLOAD_URL_BASE_PROPERTY = "argeo.rap.specific.forcedDownloadUrlBase";
- public 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, InputStream is) {
- // org.argeo.eclipse.ui.dialogs.Error.show("In Open File for RAP.");
+ 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.isTraceEnabled())
+ log.trace("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 File createTmpFile(String prefix, String suffix, InputStream is) {
- File tmpFile = null;
- return tmpFile;
+ private String createFullDownloadUrl(String fileName, String fileId) {
+ StringBuilder url = new StringBuilder();
+ // in case RAP is proxied we need to specify the actual base URL
+ // TODO find a cleaner way
+ String forcedDownloadUrlBase = System
+ .getProperty(FORCED_DOWNLOAD_URL_BASE_PROPERTY);
+ if (forcedDownloadUrlBase != null)
+ url.append(forcedDownloadUrlBase);
+ else
+ 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;
+ }
}