protected final void doPost()

in dubbo-compatible/src/main/java/com/alibaba/dubbo/container/page/PageServlet.java [93:202]
110 lines of code
25 McCabe index (conditional complexity)

    protected final void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        if (!response.isCommitted()) {
            PrintWriter writer = response.getWriter();
            String uri = request.getRequestURI();
            boolean isHtml = false;
            if (uri == null || uri.length() == 0 || "/".equals(uri)) {
                uri = "index";
                isHtml = true;
            } else {
                if (uri.startsWith("/")) {
                    uri = uri.substring(1);
                }
                if (uri.endsWith(".html")) {
                    uri = uri.substring(0, uri.length() - ".html".length());
                    isHtml = true;
                }
            }
            if (uri.endsWith("favicon.ico")) {
                response.sendError(HttpServletResponse.SC_NOT_FOUND);
                return;
            }
            ExtensionLoader<PageHandler> pageHandlerLoader = ExtensionLoader.getExtensionLoader(PageHandler.class);
            PageHandler pageHandler = pageHandlerLoader.hasExtension(uri) ? pageHandlerLoader.getExtension(uri) : null;
            if (isHtml) {
                writer.println("<html><head><title>Dubbo</title>");
                writer.println(
                        "<style type=\"text/css\">html, body {margin: 10;padding: 0;background-color: #6D838C;font-family: Arial, Verdana;font-size: 12px;color: #FFFFFF;text-align: center;vertical-align: middle;word-break: break-all; } table {width: 90%; margin: 0px auto;border-collapse: collapse;border: 8px solid #FFFFFF; } thead tr {background-color: #253c46; } tbody tr {background-color: #8da5af; } th {padding-top: 4px;padding-bottom: 4px;font-size: 14px;height: 20px; } td {margin: 3px;padding: 3px;border: 2px solid #FFFFFF;font-size: 14px;height: 25px; } a {color: #FFFFFF;cursor: pointer;text-decoration: underline; } a:hover {text-decoration: none; }</style>");
                writer.println("</head><body>");
            }
            if (pageHandler != null) {
                Page page = null;
                try {
                    String query = request.getQueryString();
                    page = pageHandler.handle(
                            URL.valueOf(request.getRequestURL().toString()
                                    + (query == null || query.length() == 0 ? "" : "?" + query)));
                } catch (Throwable t) {
                    logger.warn(t.getMessage(), t);
                    String msg = t.getMessage();
                    if (msg == null) {
                        msg = StringUtils.toString(t);
                    }
                    if (isHtml) {
                        writer.println("<table>");
                        writer.println("<thead>");
                        writer.println("    <tr>");
                        writer.println("        <th>Error</th>");
                        writer.println("    </tr>");
                        writer.println("</thead>");
                        writer.println("<tbody>");
                        writer.println("    <tr>");
                        writer.println("        <td>");
                        writer.println("            "
                                + msg.replace("<", "&lt;").replace(">", "&lt;").replace("\n", "<br/>"));
                        writer.println("        </td>");
                        writer.println("    </tr>");
                        writer.println("</tbody>");
                        writer.println("</table>");
                        writer.println("<br/>");
                    } else {
                        writer.println(msg);
                    }
                }
                if (page != null) {
                    if (isHtml) {
                        String nav = page.getNavigation();
                        if (nav == null || nav.length() == 0) {
                            nav = ExtensionLoader.getExtensionLoader(PageHandler.class)
                                    .getExtensionName(pageHandler);
                            nav = nav.substring(0, 1).toUpperCase() + nav.substring(1);
                        }
                        if (!"index".equals(uri)) {
                            nav = "<a href=\"/\">Home</a> &gt; " + nav;
                        }
                        writeMenu(request, writer, nav);
                        writeTable(writer, page.getTitle(), page.getColumns(), page.getRows());
                    } else {
                        if (page.getRows().size() > 0 && page.getRows().get(0).size() > 0) {
                            writer.println(page.getRows().get(0).get(0));
                        }
                    }
                }
            } else {
                if (isHtml) {
                    writer.println("<table>");
                    writer.println("<thead>");
                    writer.println("    <tr>");
                    writer.println("        <th>Error</th>");
                    writer.println("    </tr>");
                    writer.println("</thead>");
                    writer.println("<tbody>");
                    writer.println("    <tr>");
                    writer.println("        <td>");
                    writer.println("            Not found " + uri + " page. Please goto <a href=\"/\">Home</a> page.");
                    writer.println("        </td>");
                    writer.println("    </tr>");
                    writer.println("</tbody>");
                    writer.println("</table>");
                    writer.println("<br/>");
                } else {
                    writer.println("Not found " + uri + " page.");
                }
            }
            if (isHtml) {
                writer.println("</body></html>");
            }
            writer.flush();
        }
    }