webdavservlet.java

This temp directory is used by the JVM for temporary file storage. The JVM is configured to use thi

            String servletPath = req.getServletPath();
            if ((servletPath != null) &&
                (destinationPath.startsWith(servletPath))) {
                destinationPath = destinationPath
                    .substring(servletPath.length());
            }
        }

        if (debug > 0)
            System.out.println("Dest path :" + destinationPath);

        if ((destinationPath.toUpperCase().startsWith("/WEB-INF")) ||
            (destinationPath.toUpperCase().startsWith("/META-INF"))) {
            resp.sendError(WebdavStatus.SC_FORBIDDEN);
            return false;
        }

        String path = getRelativePath(req);

        if ((path.toUpperCase().startsWith("/WEB-INF")) ||
            (path.toUpperCase().startsWith("/META-INF"))) {
            resp.sendError(WebdavStatus.SC_FORBIDDEN);
            return false;
        }

        if (destinationPath.equals(path)) {
            resp.sendError(WebdavStatus.SC_FORBIDDEN);
            return false;
        }

        // Parsing overwrite header

        boolean overwrite = true;
        String overwriteHeader = req.getHeader("Overwrite");

        if (overwriteHeader != null) {
            if (overwriteHeader.equalsIgnoreCase("T")) {
                overwrite = true;
            } else {
                overwrite = false;
            }
        }

        // Overwriting the destination

        // Retrieve the resources
        DirContext resources = getResources();

        if (resources == null) {
            resp.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
            return false;
        }

        boolean exists = true;
        try {
            resources.lookup(destinationPath);
        } catch (NamingException e) {
            exists = false;
        }

        if (overwrite) {

            // Delete destination resource, if it exists
            if (exists) {
                if (!deleteResource(destinationPath, req, resp)) {
                    return false;
                } else {
                    resp.setStatus(WebdavStatus.SC_NO_CONTENT);
                }
            } else {
                resp.setStatus(WebdavStatus.SC_CREATED);
            }

        } else {

            // If the destination exists, then it's a conflict
            if (exists) {
                resp.sendError(WebdavStatus.SC_PRECONDITION_FAILED);
                return false;
            }

        }

        // Copying source to destination

        Hashtable errorList = new Hashtable();

        boolean result = copyResource(resources, errorList,
                                      path, destinationPath);

        if ((!result) || (!errorList.isEmpty())) {

            sendReport(req, resp, errorList);
            return false;

        }

        // Removing any lock-null resource which would be present at
        // the destination path
        lockNullResources.remove(destinationPath);

        return true;

    }


    /**
     * Copy a collection.
     *
     * @param resources Resources implementation to be used
     * @param errorList Hashtable containing the list of errors which occurred
     * during the copy operation
     * @param source Path of the resource to be copied
     * @param dest Destination path
     */
    private boolean copyResource(DirContext resources, Hashtable errorList,
                                 String source, String dest) {

        if (debug > 1)
            System.out.println("Copy: " + source + " To: " + dest);

        Object object = null;
        try {
            object = resources.lookup(source);
        } catch (NamingException e) {
        }

        if (object instanceof DirContext) {

            try {
                resources.createSubcontext(dest);
            } catch (NamingException e) {
                errorList.put
                    (dest, new Integer(WebdavStatus.SC_CONFLICT));
                return false;
            }

            try {
                NamingEnumeration enum = resources.list(source);
                while (enum.hasMoreElements()) {
                    NameClassPair ncPair = (NameClassPair) enum.nextElement();
                    String childDest = dest;
                    if (!childDest.equals("/"))
                        childDest += "/";
                    childDest += ncPair.getName();
                    String childSrc = source;
                    if (!childSrc.equals("/"))
                        childSrc += "/";
                    childSrc += ncPair.getName();
                    copyResource(resources, errorList, childSrc, childDest);
                }
            } catch (NamingException e) {
                errorList.put
                    (dest, new Integer(WebdavStatus.SC_INTERNAL_SERVER_ERROR));
                return false;
            }

        } else {

            if (object instanceof Resource) {
                try {
                    resources.bind(dest, object);
                } catch (NamingException e) {
                    errorList.put
                        (source,
                         new Integer(WebdavStatus.SC_INTERNAL_SERVER_ERROR));
                    return false;
                }
            } else {
                errorList.put
                    (source,
                     new Integer(WebdavStatus.SC_INTERNAL_SERVER_ERROR));
                return false;
            }

        }

        return true;

    }


    /**
     * Delete a resource.
     *
     * @param req Servlet request
     * @param resp Servlet response
     * @return boolean true if the copy is successful
     */
    private boolean deleteResource(HttpServletRequest req,
                                   HttpServletResponse resp)
        throws ServletException, IOException {

        String path = getRelativePath(req);

        return deleteResource(path, req, resp);

    }


    /**
     * Delete a resource.
     *
     * @param path Path of the resource which is to be deleted
     * @param req Servlet request
     * @param resp Servlet response
     */
    private boolean deleteResource(String path, HttpServletRequest req,
                                   HttpServletResponse resp)
        throws ServletException, IOException {

        if ((path.toUpperCase().startsWith("/WEB-INF")) ||
            (path.toUpperCase().startsWith("/META-INF"))) {
            resp.sendError(WebdavStatus.SC_FORBIDDEN);
            return false;
        }

        String ifHeader = req.getHeader("If");
        if (ifHeader == null)
            ifHeader = "";

        String lockTokenHeader = req.getHeader("Lock-Token");
        if (lockTokenHeader == null)
            lockTokenHeader = "";

        if (isLocked(path, ifHeader + lockTokenHeader)) {
            resp.sendError(WebdavStatus.SC_LOCKED);
            return false;
        }

        // Retrieve the resources
        DirContext resources = getResources();

        if (resources == null) {
            resp.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
            return false;
        }

        boolean exists = true;
        Object object = null;
        try {
            object = resources.lookup(path);
        } catch (NamingException e) {
            exists = false;
        }

        if (!exists) {
            resp.sendError(WebdavStatus.SC_NOT_FOUND);
            return false;
        }

        boolean collection = (object instanceof DirContext);

        if (!collection) {
            try {
                resources.unbind(path);
            } catch (NamingException e) {
                resp.sendError(WebdavStatus.SC_INTERNAL_SERVER_ERROR);
                return false;
            }
        } else {

            Hashtable errorList = new Hashtable();

            deleteCollection(req, resources, path, errorList);
            try {
                resources.unbind(path);
            } catch (NamingException e) {
                errorList.put(path, new Integer
                    (WebdavStatus.SC_INTERNAL_SERVER_ERROR));
            }

            if (!errorList.isEmpty()) {

                sendReport(req, resp, errorList);
                return false;

            }

        }

        resp.setStatus(WebdavStatus.SC_NO_CONTENT);
        return true;

    }


    /**
     * Deletes a collection.
     *
     * @param resources Resources implementation associated with the context
     * @param path Path to the collection to be deleted
     * @param errorList Contains the list of the errors which occurred
     */
    private void deleteCollection(HttpServletRequest req,
                                  DirContext resources,
                                  String path, Hashtable errorList) {

        if (debug > 1)
            System.out.println("Delete:" + path);

        if ((path.toUpperCase().startsWith("/WEB-INF")) ||
            (path.toUpperCase().startsWith("/META-INF"))) {
            errorList.put(path, new Integer(WebdavStatus.SC_FORBIDDEN));
            return;
        }

        String ifHeader = req.getHeader("If");
        if (ifHeader == null)
            ifHeader = "";

        String lockTokenHeader = req.getHeader("Lock-Token");
        if (lockTokenHeader == null)
            lockTokenHeader = "";

        Enumeration enum = null;
        try {
            enum = resources.list(path);
        } catch (NamingException e) {
            errorList.put(path, new Integer
                (WebdavStatus.SC_INTERNAL_SERVER_ERROR));
            return;
        }

        while (enum.hasMoreElements()) {
            NameClassPair ncPair = (NameClassPair) enum.nextElement();
            String childName = path;
            if (!childName.equals("/"))
                childName += "/";
            childName += ncPair.getName();

            if (isLocked(childName, ifHeader + lockTokenHeader)) {

                errorList.put(childName, new Integer(WebdavStatus.SC_LOCKED));

            } else {

                try {
                    Object object = resources.lookup(childName);
                    if (object instanceof DirContext) {
                        deleteCollection(req, resources, childName, errorList);
                    }

                    try {
                        resources.unbind(childName);
                    } catch (NamingException e) {
                        if (!(object instanceof DirContext)) {
                            // If it's not a collection, then it's an unknown
                            // error
                            errorList.put
                                (childName, new Integer
                                    (WebdavStatus.SC_INTERNAL_SERVER_ERROR));
                        }
                    }
                } catch (NamingException e) {
                    errorList.put
                        (childName, new Integer
                            (WebdavStatus.SC_INTERNAL_SERVER_ERROR));
                }
            }

        }

    }


    /**
     * Send a multistatus element containing a complete error report to the
     * client.
     *
     * @param req Servlet request
     * @param resp Servlet response
     * @param errorList List of error to be displayed
     */
    private void sendReport(HttpServletRequest req, HttpServletResponse resp,
                            Hashtable errorList)
        throws ServletException, IOException {

        resp.setStatus(WebdavStatus.SC_MULTI_STATUS);

        String absoluteUri = req.getRequestURI();
        String relativePath = getRelativePath(req);

        XMLWriter generatedXML = new XMLWriter();
        generatedXML.writeXMLHeader();

        generatedXML.writeElement(null, "multistatus"