fsresource/src/main/java/org/apache/sling/fsprovider/FsFolderServlet.java - sling-samples - Git at Google

 /*
  * Licensed to the Apache Software Foundation (ASF) under one
  * or more contributor license agreements.  See the NOTICE file
  * distributed with this work for additional information
  * regarding copyright ownership.  The ASF licenses this file
  * to you 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.apache.sling.fsprovider;

 import java.io.File;
 import java.io.IOException;
 import java.io.PrintWriter;
 import java.util.Arrays;
 import java.util.Comparator;
 import java.util.Date;

 import org.apache.sling.api.SlingHttpServletRequest;
 import org.apache.sling.api.SlingHttpServletResponse;
 import org.apache.sling.api.resource.Resource;
 import org.apache.sling.api.resource.ResourceNotFoundException;
 import org.apache.sling.api.resource.ResourceUtil;
 import org.apache.sling.api.servlets.SlingSafeMethodsServlet;

 /**
  * The <code>FsFolderServlet</code> lists the files and folders of a folder
  * mapped into the Sling resource tree. The listing produced is similar to the
  * default index listing produced by Apache httpd.
  *
  * @scr.component immediate="true" metatype="no"
  * @scr.service interface="javax.servlet.Servlet"
  * @scr.property name="service.description" value="FileSystem Folder Servlet"
  * @scr.property name="service.vendor" value="The Apache Software Foundation"
  * @scr.property name="sling.servlet.methods" value="GET"
  * @scr.property name="sling.servlet.resourceTypes"
  *               valueRef="FsProviderConstants.RESOURCE_TYPE_FOLDER"
  */
 public class FsFolderServlet extends SlingSafeMethodsServlet {

     // a number of blanks used to format the listing of folder entries
     private static final String NAME_BLANKS = "                                  ";

     @Override
     protected void doGet(SlingHttpServletRequest request,
             SlingHttpServletResponse response) throws IOException {

         // if the request URL is not terminated with a slash, redirect to the
         // same URL with a trailing slash (this makes preparing the response
         // easier
         if (!request.getRequestURI().endsWith("/")) {
             response.sendRedirect(request.getRequestURL() + "/");
             return;
         }

         // ensure the resource adapts to a filesystem folder; generally
         // this should be the case, but we never know whether someone really
         // creates a JCR resource with the fs provider folder resource type
         Resource res = request.getResource();
         File file = res.adaptTo(File.class);
         if (file == null || !file.isDirectory()) {
             throw new ResourceNotFoundException(
                 request.getResource().getPath(),
                 "Resource is not a file system folder");
         }

         response.setContentType("text/html");
         response.setCharacterEncoding("UTF-8");
         PrintWriter pw = response.getWriter();

         pw.println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 3.2 Final//EN\"> <html>");

         pw.printf("<head><title>Index of %s</title></head><body>%n", res.getPath());
         pw.printf("<h1>Index of %s</h1>%n", res.getPath());

         pw.println("<pre>");
         pw.println("Name                               Last modified                   Size  Description");
         pw.println("<hr>");

         // only draw parent link if the parent is also a fs resource
         Resource parent = ResourceUtil.getParent(res);
         if (parent != null && parent.adaptTo(File.class) != null) {
             pw.println("<a href='..'>Parent Directory</a>");
         }

         // render the children
         renderChildren(pw, file);

         pw.println("</pre>");
         pw.println("</body></html>");
     }

     // ---------- internal

     /**
      * Renders the children of the <code>parent</code> folder to the output.
      */
     private void renderChildren(PrintWriter pw, File parent) {
         File[] children = parent.listFiles();
         if (children != null && children.length > 0) {
             Arrays.sort(children, FileNameComparator.INSTANCE);

             for (File child : children) {

                 String name = child.getName();
                 if (child.isDirectory()) {
                     name = name.concat("/");
                 }

                 String displayName = name;
                 if (displayName.length() >= 32) {
                     displayName = displayName.substring(0, 29).concat("...");
                     pw.printf("<a href='%s'>%s</a>", name, displayName);
                 } else {
                     String blanks = NAME_BLANKS.substring(0,
                         32 - displayName.length());
                     pw.printf("<a href='%s'>%s</a>%s", name, displayName,
                         blanks);
                 }

                 pw.print("   " + new Date(child.lastModified()));

                 pw.print("   ");
                 if (child.isFile()) {
                     pw.print(child.length());
                 } else {
                     pw.print("-");
                 }

                 pw.println();
             }
         }
     }

     // order files by type (folder before files) and name (case insensitive)
     private static class FileNameComparator implements Comparator<File> {

         public static final FileNameComparator INSTANCE = new FileNameComparator();

         public int compare(File f1, File f2) {
             if (f1.isDirectory() && !f2.isDirectory()) {
                 return -1;
             } else if (!f1.isDirectory() && f2.isDirectory()) {
                 return 1;
             }

             return f1.getName().compareToIgnoreCase(f2.getName());
         }
     }

 }
	/*
	* Licensed to the Apache Software Foundation (ASF) under one
	* or more contributor license agreements. See the NOTICE file
	* distributed with this work for additional information
	* regarding copyright ownership. The ASF licenses this file
	* to you 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.apache.sling.fsprovider;

	import java.io.File;
	import java.io.IOException;
	import java.io.PrintWriter;
	import java.util.Arrays;
	import java.util.Comparator;
	import java.util.Date;

	import org.apache.sling.api.SlingHttpServletRequest;
	import org.apache.sling.api.SlingHttpServletResponse;
	import org.apache.sling.api.resource.Resource;
	import org.apache.sling.api.resource.ResourceNotFoundException;
	import org.apache.sling.api.resource.ResourceUtil;
	import org.apache.sling.api.servlets.SlingSafeMethodsServlet;

	/**
	* The <code>FsFolderServlet</code> lists the files and folders of a folder
	* mapped into the Sling resource tree. The listing produced is similar to the
	* default index listing produced by Apache httpd.
	*
	* @scr.component immediate="true" metatype="no"
	* @scr.service interface="javax.servlet.Servlet"
	* @scr.property name="service.description" value="FileSystem Folder Servlet"
	* @scr.property name="service.vendor" value="The Apache Software Foundation"
	* @scr.property name="sling.servlet.methods" value="GET"
	* @scr.property name="sling.servlet.resourceTypes"
	* valueRef="FsProviderConstants.RESOURCE_TYPE_FOLDER"
	*/
	public class FsFolderServlet extends SlingSafeMethodsServlet {

	// a number of blanks used to format the listing of folder entries
	private static final String NAME_BLANKS = " ";

	@Override
	protected void doGet(SlingHttpServletRequest request,
	SlingHttpServletResponse response) throws IOException {

	// if the request URL is not terminated with a slash, redirect to the
	// same URL with a trailing slash (this makes preparing the response
	// easier
	if (!request.getRequestURI().endsWith("/")) {
	response.sendRedirect(request.getRequestURL() + "/");
	return;
	}

	// ensure the resource adapts to a filesystem folder; generally
	// this should be the case, but we never know whether someone really
	// creates a JCR resource with the fs provider folder resource type
	Resource res = request.getResource();
	File file = res.adaptTo(File.class);
	if (file == null \|\| !file.isDirectory()) {
	throw new ResourceNotFoundException(
	request.getResource().getPath(),
	"Resource is not a file system folder");
	}

	response.setContentType("text/html");
	response.setCharacterEncoding("UTF-8");
	PrintWriter pw = response.getWriter();

	pw.println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 3.2 Final//EN\"> <html>");

	pw.printf("<head><title>Index of %s</title></head><body>%n", res.getPath());
	pw.printf("<h1>Index of %s</h1>%n", res.getPath());

	pw.println("<pre>");
	pw.println("Name Last modified Size Description");
	pw.println("<hr>");

	// only draw parent link if the parent is also a fs resource
	Resource parent = ResourceUtil.getParent(res);
	if (parent != null && parent.adaptTo(File.class) != null) {
	pw.println("<a href='..'>Parent Directory</a>");
	}

	// render the children
	renderChildren(pw, file);

	pw.println("</pre>");
	pw.println("</body></html>");
	}

	// ---------- internal

	/**
	* Renders the children of the <code>parent</code> folder to the output.
	*/
	private void renderChildren(PrintWriter pw, File parent) {
	File[] children = parent.listFiles();
	if (children != null && children.length > 0) {
	Arrays.sort(children, FileNameComparator.INSTANCE);

	for (File child : children) {

	String name = child.getName();
	if (child.isDirectory()) {
	name = name.concat("/");
	}

	String displayName = name;
	if (displayName.length() >= 32) {
	displayName = displayName.substring(0, 29).concat("...");
	pw.printf("<a href='%s'>%s</a>", name, displayName);
	} else {
	String blanks = NAME_BLANKS.substring(0,
	32 - displayName.length());
	pw.printf("<a href='%s'>%s</a>%s", name, displayName,
	blanks);
	}

	pw.print(" " + new Date(child.lastModified()));

	pw.print(" ");
	if (child.isFile()) {
	pw.print(child.length());
	} else {
	pw.print("-");
	}

	pw.println();
	}
	}
	}

	// order files by type (folder before files) and name (case insensitive)
	private static class FileNameComparator implements Comparator<File> {

	public static final FileNameComparator INSTANCE = new FileNameComparator();

	public int compare(File f1, File f2) {
	if (f1.isDirectory() && !f2.isDirectory()) {
	return -1;
	} else if (!f1.isDirectory() && f2.isDirectory()) {
	return 1;
	}

	return f1.getName().compareToIgnoreCase(f2.getName());
	}
	}

	}