Method preCompile

java/org/apache/jasper/servlet/JspServlet.java:202–243

Look for a precompilation request as described in Section 8.4.2 of the JSP 1.2 Specification. WARNING - we cannot use request.getParameter() for this, because that will trigger parsing all of the request parameters, and not give a servlet the opportunity to

(HttpServletRequest request)

     *                                 specified
     */
    boolean preCompile(HttpServletRequest request) throws ServletException {

        String precompileParameter = rctxt.getOptions().getJspPrecompilationQueryParameter();
        String queryString = request.getQueryString();
        if (queryString == null) {
            return false;
        }
        int start = queryString.indexOf(precompileParameter);
        if (start < 0) {
            return false;
        }
        queryString = queryString.substring(start + precompileParameter.length());
        if (queryString.isEmpty()) {
            return true; // ?jsp_precompile
        }
        if (queryString.startsWith("&")) {
            return true; // ?jsp_precompile&foo=bar...
        }
        if (!queryString.startsWith("=")) {
            return false; // part of some other name or value
        }
        int limit = queryString.length();
        int ampersand = queryString.indexOf('&');
        if (ampersand > 0) {
            limit = ampersand;
        }
        String value = queryString.substring(1, limit);
        if (value.equals("true")) {
            return true; // ?jsp_precompile=true
        } else if (value.equals("false")) {
            // Spec says if jsp_precompile=false, the request should not
            // be delivered to the JSP page; the easiest way to implement
            // this is to set the flag to true, and precompile the page anyway.
            // This still conforms to the spec, since it says the
            // precompilation request can be ignored.
            return true; // ?jsp_precompile=false
        } else {
            throw new ServletException(
                    Localizer.getMessage("jsp.error.precompilation.parameter", precompileParameter, value));
        }

    }


    @Override