private String getProcPropertiesString(HttpServletRequest request,
            String procName) throws SIEIProxyServletException {
        String propertiesSource = request.getHeader("X-Processor-Props");

        if (propertiesSource == null) {
            log.debug("Processor properties are not specified");
            return "";
        }

        String[] procsProps = propertiesSource.split("^");
        if (procsProps == null)
            return "";

        // TODO: Make it with regex:
        // \[Processor=([A-Za-z0-9_]+)\|(""([^""]+)"":""([^""]+)""\,?)+\]

        Pattern pattern = Pattern.compile(
                "\\[Processor=([A-Za-z0-9_]+)\\|(.)+\\]",
                Pattern.CASE_INSENSITIVE);

        for (String propLine : procsProps) {
            Matcher matcher = pattern.matcher(propLine);
            String processorName = null;
            String processorProps = null;
            boolean foundMatch = matcher.find();

            if (foundMatch && matcher.groupCount() == 2) {
                processorName = matcher.group(1);
            }
            if (processorName != null && procName.equals(processorName)) {
                CharSequence start = "[Processor=" + processorName + "|";
                CharSequence whitespace = "";
                processorProps = propLine.replace(start, whitespace);
                return processorProps.substring(0, processorProps.length() - 1);
            }
        }
        return "";
    }