edu.temple.cis3238.wiki.utils.FileUtils.java Source code

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Here is the source code for edu.temple.cis3238.wiki.utils.FileUtils.java

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package edu.temple.cis3238.wiki.utils;

import edu.temple.cis3238.wiki.ui.servlets.UploaderServlet;
import edu.temple.cis3238.wiki.vo.*;
import javax.servlet.*;
import java.io.File;
import java.io.IOException;
import java.util.logging.*;
import java.util.regex.*;
import org.apache.commons.fileupload.UploadContext;

/**
 * Helper methods for validating and uploading files
 * 
 * @author dan
 * @see UploaderServlet
 * @see UploadContext
 */
public class FileUtils {
    private static final Logger LOG = Logger.getLogger(FileUtils.class.getName());

    /**
    * Verifies valid file extension
    * @param filePath full path of file
    * @param extraValidExtensions CSV list of additional valid file extensions.
    * @return valid
    * @see edu.temple.cis3238.wiki.ui.servlets.UploadServlet
    */
    public static boolean checkFileExtension(String filePath, String extraValidExtensions) {
        String[] extensionArray = { "" };
        String extensions = "";
        if (extraValidExtensions != null && !extraValidExtensions.isEmpty()) {
            extensionArray = extraValidExtensions.replace(" ", "").toLowerCase().split(",");
            extensions = "|" + org.apache.commons.lang3.StringUtils.join(extensionArray, '|');
            extensions = org.apache.commons.lang3.StringUtils.removeEnd(extensions.trim(), "|");
        }
        File file = new File(filePath);
        String validExts = "(pdf|mp4|m4v|wmv|flv|swf|avi|mov|mpeg|mpg|mov|doc|docx|xls|xlsx|ppt|pptx|txt|jpg|jpeg|png"
                + extensions + ")";
        //        if (!file.isFile()) {
        //            return false;
        //        }
        //      else {
        String type = filePath.substring(filePath.lastIndexOf(".") + 1, filePath.length()).toLowerCase();

        try {
            Pattern regex = Pattern.compile(validExts, Pattern.CASE_INSENSITIVE | Pattern.UNICODE_CASE);
            Matcher regexMatcher = regex.matcher(type);
            if (regexMatcher.matches()) {
                return true;
            }

        } catch (PatternSyntaxException ex) {
            LOG.log(Level.SEVERE, null, ex);
            return false;
        }

        //        }
        return false;
    }

    /**
    * Creates directories and subdirs for specified file.
    * @param context servlet
    * @param uploadDirectory [basepath]/uploads/[TopicID]/[FILENAME]
    * @param topic topicVO
    * @return Absolute path
    * @see edu.temple.cis3238.wiki.ui.servlets.UploadServlet
    */
    public static String makeDir(ServletContext context, String uploadDirectory, TopicVO topic) {
        try {
            String uploadPath = context.getRealPath("") + File.separator + uploadDirectory + File.separator
                    + topic.getTopicID();

            // creates the directory if it does not exist
            File uploadDir = new File(uploadPath);
            if (!uploadDir.exists()) {
                uploadDir.mkdirs();
            }
            return uploadPath;
        } catch (Exception e) {
            e.printStackTrace();
            return "";
        }

    }

}