private PrintWriter sendIntro()

in src/main/java/org/apache/sling/servlets/resolver/internal/defaults/DefaultErrorHandlerServlet.java [239:295]
44 lines of code
3 McCabe index (conditional complexity)

    private PrintWriter sendIntro(
            final HttpServletResponse response,
            final int statusCode,
            final String statusMessageIn,
            final String requestUri,
            final String servletName)
            throws IOException {

        final String statusMessage = ResponseUtil.escapeXml(statusMessageIn);

        // set the status code and content type in the response
        final PrintWriter pw;
        if (!response.isCommitted()) {

            response.reset();
            response.setStatus(statusCode);
            response.setContentType(HTML_CONTENT_TYPE);
            response.setCharacterEncoding("UTF-8");

            pw = response.getWriter();
            pw.println("<!DOCTYPE HTML PUBLIC \"-//IETF//DTD HTML 2.0//EN\">");
            pw.println("<html>");
            pw.println("<head>");
            pw.print("<title>");
            pw.print(statusCode);
            pw.print(" ");
            pw.print(statusMessage);
            pw.println("</title>");
            pw.println("</head>");
            pw.println("<body>");

        } else {

            // Response already committed: don't change status or write HTML prolog, but report
            // the error inline and warn about that
            log.warn("Response already committed, unable to change status, output might not be well formed");
            pw = response.getWriter();
        }

        pw.print("<h1>");
        pw.print(statusMessage);
        pw.print(" (");
        pw.print(statusCode);
        pw.println(")</h1>");
        pw.print("<p>The requested URL ");
        pw.print(ResponseUtil.escapeXml(requestUri));
        pw.print(" resulted in an error");

        if (servletName != null) {
            pw.print(" in ");
            pw.print(ResponseUtil.escapeXml(servletName));
        }

        pw.println(".</p>");

        return pw;
    }