X-Git-Url: https://git.argeo.org/?a=blobdiff_plain;ds=sidebyside;f=eclipse%2Fruntime%2Forg.argeo.eclipse.ui.rap%2Fsrc%2Fmain%2Fjava%2Forg%2Fargeo%2Feclipse%2Fui%2Fspecific%2FFileHandler.java;h=aba79c1c1912a7abfe1721620e3c051135680005;hb=70afc8f7860266f1ac93c852d552ee0971e93c15;hp=8948e73c7a90a5b86d3e1a6a62b798a767b4707e;hpb=5f0b7679ef0cbcb1b101f71673f1e5e24e735b39;p=lgpl%2Fargeo-commons.git

diff --git a/eclipse/runtime/org.argeo.eclipse.ui.rap/src/main/java/org/argeo/eclipse/ui/specific/FileHandler.java b/eclipse/runtime/org.argeo.eclipse.ui.rap/src/main/java/org/argeo/eclipse/ui/specific/FileHandler.java
index 8948e73c7..aba79c1c1 100644
--- a/eclipse/runtime/org.argeo.eclipse.ui.rap/src/main/java/org/argeo/eclipse/ui/specific/FileHandler.java
+++ b/eclipse/runtime/org.argeo.eclipse.ui.rap/src/main/java/org/argeo/eclipse/ui/specific/FileHandler.java
@@ -1,75 +1,88 @@
 package org.argeo.eclipse.ui.specific;
 
-import java.awt.Desktop;
-import java.io.BufferedInputStream;
-import java.io.File;
-import java.io.FileOutputStream;
-import java.io.IOException;
-import java.io.InputStream;
-import java.io.OutputStream;
+import java.net.URL;
 
-import org.apache.commons.io.IOUtils;
-import org.argeo.ArgeoException;
-
-//import org.apache.commons.io;
+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 BufferedInputStream bis;
+	private final static Log log = LogFactory.getLog(FileHandler.class);
 
-	public FileHandler() {
+	public FileHandler(FileProvider provider) {
+		// Instantiate and register the DownloadServicHandler.
+		IServiceManager manager = RWT.getServiceManager();
+		IServiceHandler handler = new DownloadServiceHandler(provider);
+		manager.registerServiceHandler("downloadServiceHandler", handler);
 	}
 
-	public File createTmpFile(String fileName, String suffix, InputStream is) {
-		File tmpFile = null;
-		OutputStream os = null;
+	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 {
-			tmpFile = File.createTempFile(fileName, suffix);
-			os = new FileOutputStream(tmpFile);
-			IOUtils.copy(is, os);
-		} catch (IOException e) {
-			throw new ArgeoException("Cannot open file " + fileName, e);
-		} finally {
-			IOUtils.closeQuietly(os);
+			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();
 		}
-		return tmpFile;
+
+		// 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");
 	}
 
-	public void openFile(String fileName, InputStream is) {
-	
-		String prefix ="", extension = "";
-		
-		if (fileName != null){
-			int ind = fileName.
-			if (true){
-				}
-			}
-			
-		prefix = .substring(0,
-				node.getName().lastIndexOf('.'));
-		extension = node.getName().substring(
-				node.getName().lastIndexOf('.'));
-		try {
-			Desktop desktop = null;
-			if (Desktop.isDesktopSupported()) {
-				desktop = Desktop.getDesktop();
-			}
-			desktop.open(file);
-		} catch (IOException e) {
-			throw new ArgeoException("Cannot open file " + file.getName(), e);
-		}
+	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();
 	}
-	
-	
-	public void openFile(File file) {
-		try {
-			Desktop desktop = null;
-			if (Desktop.isDesktopSupported()) {
-				desktop = Desktop.getDesktop();
-			}
-			desktop.open(file);
-		} catch (IOException e) {
-			throw new ArgeoException("Cannot open file " + file.getName(), e);
-		}
+
+	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;
 	}
 }