Start migrating SLC client

[gpl/argeo-slc.git] / org.argeo.slc.client.rap / src / main / java / org / argeo / slc / client / rap / OpenJcrFileService.java

diff --git a/org.argeo.slc.client.rap/src/main/java/org/argeo/slc/client/rap/OpenJcrFileService.java b/org.argeo.slc.client.rap/src/main/java/org/argeo/slc/client/rap/OpenJcrFileService.java
new file mode 100644 (file)
index 0000000..a4dfaf4
--- /dev/null
+++ b/org.argeo.slc.client.rap/src/main/java/org/argeo/slc/client/rap/OpenJcrFileService.java
@@ -0,0 +1,98 @@
+package org.argeo.slc.client.rap;
+
+import java.io.IOException;
+import java.io.InputStream;
+
+import javax.jcr.Node;
+import javax.jcr.Property;
+import javax.jcr.RepositoryException;
+import javax.jcr.Session;
+import javax.jcr.nodetype.NodeType;
+import javax.servlet.ServletException;
+import javax.servlet.http.HttpServletResponse;
+
+import org.apache.commons.io.IOUtils;
+import org.argeo.jcr.JcrUtils;
+import org.argeo.slc.SlcException;
+import org.eclipse.rwt.RWT;
+import org.eclipse.rwt.service.IServiceHandler;
+
+/**
+ * Basic Default service handler that retrieves a file from a NT_FILE JCR node
+ * and launch the download.
+ */
+public class OpenJcrFileService implements IServiceHandler {
+
+       /* DEPENDENCY INJECTION */
+       final private Node fileNode;
+
+       public OpenJcrFileService(Node fileNode) {
+               this.fileNode = fileNode;
+       }
+
+       public void service() throws IOException, ServletException {
+               // Get the file content
+               byte[] download = getFileAsByteArray();
+
+               // Send the file in the response
+               HttpServletResponse response = RWT.getResponse();
+               response.setContentType("application/octet-stream");
+               response.setContentLength(download.length);
+               String contentDisposition = null;
+               try {
+                       contentDisposition = "attachment; filename=\""
+                                       + JcrUtils.lastPathElement(fileNode.getPath()) + "\"";
+               } catch (RepositoryException e) {
+                       throw new SlcException("Error while getting file Path " + fileNode,
+                                       e);
+               }
+               response.setHeader("Content-Disposition", contentDisposition);
+
+               try {
+                       response.getOutputStream().write(download);
+               } catch (IOException ioe) {
+                       throw new SlcException("Error while writing the file " + fileNode
+                                       + " to the servlet response", ioe);
+               }
+       }
+
+       protected byte[] getFileAsByteArray() {
+
+               Session businessSession = null;
+               try {
+                       boolean isValid = true;
+                       Node child = null;
+                       if (!fileNode.isNodeType(NodeType.NT_FILE))
+                               isValid = false;
+                       else {
+                               child = fileNode.getNode(Property.JCR_CONTENT);
+                               if (!(child.isNodeType(NodeType.NT_RESOURCE) || child
+                                               .hasProperty(Property.JCR_DATA)))
+                                       isValid = false;
+                       }
+
+                       if (!isValid)
+                               return null;
+
+                       byte[] ba = null;
+                       InputStream fis = null;
+                       try {
+                               fis = (InputStream) child.getProperty(Property.JCR_DATA)
+                                               .getBinary().getStream();
+                               ba = IOUtils.toByteArray(fis);
+                       } catch (Exception e) {
+                               throw new SlcException("Stream error while opening file "
+                                               + fileNode, e);
+                       } finally {
+                               IOUtils.closeQuietly(fis);
+                       }
+                       return ba;
+
+               } catch (RepositoryException e) {
+                       throw new SlcException("Unexpected error while "
+                                       + "opening file node " + fileNode, e);
+               } finally {
+                       JcrUtils.logoutQuietly(businessSession);
+               }
+       }
+}
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