Method doUnlock

java/org/apache/catalina/servlets/WebdavServlet.java:1833–1912

UNLOCK Method. @param req The Servlet request @param resp The Servlet response @throws IOException If an IO error occurs

(HttpServletRequest req, HttpServletResponse resp)

     * @throws IOException If an IO error occurs
     */
    protected void doUnlock(HttpServletRequest req, HttpServletResponse resp) throws IOException {

        if (isReadOnly()) {
            resp.sendError(WebdavStatus.SC_FORBIDDEN);
            return;
        }

        String path = getRelativePath(req);

        WebResource resource = resources.getResource(path);
        if (!checkIfHeaders(req, resp, resource)) {
            resp.setStatus(HttpServletResponse.SC_PRECONDITION_FAILED);
            return;
        }

        String lockTokenHeader = req.getHeader("Lock-Token");
        if (lockTokenHeader == null) {
            resp.sendError(HttpServletResponse.SC_BAD_REQUEST);
            return;
        }

        boolean unlocked = false;
        String parentPath = path;
        do {
            LockInfo parentLock = resourceLocks.get(parentPath);
            if (parentLock != null) {
                if (parentLock.hasExpired()) {
                    resourceLocks.remove(parentPath);
                } else {
                    // parentPath == path is a check for the first loop
                    if (parentPath == path || parentLock.depth > 0) {
                        if (parentLock.isExclusive()) {
                            if (lockTokenHeader.contains(":" + parentLock.token + ">") &&
                                    (parentLock.principal == null ||
                                            parentLock.principal.equals(req.getRemoteUser()))) {
                                resourceLocks.remove(parentPath);
                                unlocked = true;
                            } else {
                                // No parent exclusive lock will be found
                                unlocked = false;
                            }
                            break;
                        } else {
                            for (String token : parentLock.sharedTokens) {
                                if (lockTokenHeader.contains(":" + token + ">")) {
                                    LockInfo lock = sharedLocks.get(token);
                                    if (lock == null) {
                                        parentLock.sharedTokens.remove(token);
                                    } else if (lock.principal == null || lock.principal.equals(req.getRemoteUser())) {
                                        // The shared lock might not have the same depth
                                        if (parentPath == path || lock.depth > 0) {
                                            parentLock.sharedTokens.remove(token);
                                            sharedLocks.remove(token);
                                            unlocked = true;
                                        }
                                    }
                                    // Unlike the if header, this can only match one token
                                    break;