private static String normalize()

in web/src/main/java/org/apache/shiro/web/util/WebUtils.java [190:247]

• 41 lines of code
• 13 McCabe index (conditional complexity)

    private static String normalize(String path, boolean replaceBackSlash) {

        if (path == null) {
            return null;
        }

        // Create a place for the normalized path
        String normalized = path;

        if (replaceBackSlash && normalized.indexOf('\\') >= 0) {
            normalized = normalized.replace('\\', '/');
        }

        if (normalized.equals("/.")) {
            return "/";
        }

        // Add a leading "/" if necessary
        if (!normalized.startsWith("/")) {
            normalized = "/" + normalized;
        }

        // Resolve occurrences of "//" in the normalized path
        while (true) {
            int index = normalized.indexOf("//");
            if (index < 0) {
                break;
            }
            normalized = normalized.substring(0, index) + normalized.substring(index + 1);
        }

        // Resolve occurrences of "/./" in the normalized path
        while (true) {
            int index = normalized.indexOf("/./");
            if (index < 0) {
                break;
            }
            normalized = normalized.substring(0, index) + normalized.substring(index + 2);
        }

        // Resolve occurrences of "/../" in the normalized path
        while (true) {
            int index = normalized.indexOf("/../");
            if (index < 0) {
                break;
            }
            if (index == 0) {
                // Trying to go outside our context
                return (null);
            }
            int index2 = normalized.lastIndexOf('/', index - 1);
            normalized = normalized.substring(0, index2) + normalized.substring(index + 3);
        }

        // Return the normalized path that we have completed
        return (normalized);

    }