X-Git-Url: http://git.argeo.org/?a=blobdiff_plain;f=base%2Fruntime%2Forg.argeo.eclipse.ui.rap%2Fsrc%2Fmain%2Fjava%2Forg%2Fargeo%2Feclipse%2Fui%2Fspecific%2FFileHandler.java;fp=base%2Fruntime%2Forg.argeo.eclipse.ui.rap%2Fsrc%2Fmain%2Fjava%2Forg%2Fargeo%2Feclipse%2Fui%2Fspecific%2FFileHandler.java;h=ad551b47939e657625c8622af6c8830040262ad5;hb=654a906a9507d52d3f3b8f1505c6ad56ad68334a;hp=0000000000000000000000000000000000000000;hpb=9f870f5870afc1babb64874d0d91c99ef3417ddd;p=lgpl%2Fargeo-commons.git diff --git a/base/runtime/org.argeo.eclipse.ui.rap/src/main/java/org/argeo/eclipse/ui/specific/FileHandler.java b/base/runtime/org.argeo.eclipse.ui.rap/src/main/java/org/argeo/eclipse/ui/specific/FileHandler.java new file mode 100644 index 000000000..ad551b479 --- /dev/null +++ b/base/runtime/org.argeo.eclipse.ui.rap/src/main/java/org/argeo/eclipse/ui/specific/FileHandler.java @@ -0,0 +1,103 @@ +/* + * 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.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 + * + */ +public class FileHandler { + public final static String FORCED_DOWNLOAD_URL_BASE_PROPERTY = "argeo.rap.specific.forcedDownloadUrlBase"; + + 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.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 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; + } +}