protected String getRedirectUrl()

in src/main/java/org/apache/sling/servlets/post/impl/SlingPostServlet.java [444:503]
41 lines of code
12 McCabe index (conditional complexity)

    protected String getRedirectUrl(final SlingJakartaHttpServletRequest request, final JakartaPostResponse ctx) {
        // redirect param has priority (but see below, magic star)
        String result = request.getParameter(SlingPostConstants.RP_REDIRECT_TO);
        if (result != null) {
            try {
                URI redirectUri = new URI(result);
                if (redirectUri.getAuthority() != null) {
                    // if it has a host information
                    log.warn(
                            "redirect target ({}) does include host information ({}). This is not allowed for security reasons!",
                            result,
                            redirectUri.getAuthority());
                    return null;
                }
            } catch (URISyntaxException e) {
                log.warn("given redirect target ({}) is not a valid uri: {}", result, e);
                return null;
            }

            log.debug("redirect requested as [{}] for path [{}]", result, ctx.getPath());

            // redirect to created/modified Resource
            final int star = result.indexOf('*');
            if (star >= 0 && ctx.getPath() != null) {
                final StringBuilder buf = new StringBuilder();

                // anything before the star
                if (star > 0) {
                    buf.append(result.substring(0, star));
                }

                // append the name of the manipulated node
                buf.append(ResourceUtil.getName(ctx.getPath()));

                // anything after the star
                if (star < result.length() - 1) {
                    buf.append(result.substring(star + 1));
                }

                // Prepend request path if it ends with create suffix and result isn't absolute
                final String requestPath = request.getPathInfo();
                if (requestPath.endsWith(SlingPostConstants.DEFAULT_CREATE_SUFFIX)
                        && buf.charAt(0) != '/'
                        && !REDIRECT_WITH_SCHEME_PATTERN.matcher(buf).matches()) {
                    buf.insert(0, requestPath);
                }

                // use the created path as the redirect result
                result = buf.toString();

            } else if (result.endsWith(SlingPostConstants.DEFAULT_CREATE_SUFFIX)) {
                // if the redirect has a trailing slash, append modified node
                // name
                result = result.concat(ResourceUtil.getName(ctx.getPath()));
            }

            log.debug("Will redirect to {}", result);
        }
        return result;
    }