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110 lines
3.1 KiB
110 lines
3.1 KiB
1 year ago
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<?php
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/*
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** Zabbix
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** Copyright (C) 2001-2023 Zabbix SIA
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**
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** This program is free software; you can redistribute it and/or modify
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** it under the terms of the GNU General Public License as published by
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** the Free Software Foundation; either version 2 of the License, or
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** (at your option) any later version.
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**
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** This program is distributed in the hope that it will be useful,
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** but WITHOUT ANY WARRANTY; without even the implied warranty of
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** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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** GNU General Public License for more details.
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**
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** You should have received a copy of the GNU General Public License
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** along with this program; if not, write to the Free Software
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** Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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**/
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/**
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* A parser for Prometheus output.
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*/
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class CPrometheusOutputParser extends CParser {
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private $options = [
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'usermacros' => false,
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'lldmacros' => false
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];
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private $user_macro_parser;
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private $lld_macro_parser;
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private $lld_macro_function_parser;
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public function __construct($options = []) {
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if (array_key_exists('usermacros', $options)) {
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$this->options['usermacros'] = $options['usermacros'];
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}
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if (array_key_exists('lldmacros', $options)) {
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$this->options['lldmacros'] = $options['lldmacros'];
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}
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if ($this->options['usermacros']) {
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$this->user_macro_parser = new CUserMacroParser();
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}
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if ($this->options['lldmacros']) {
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$this->lld_macro_parser = new CLLDMacroParser();
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$this->lld_macro_function_parser = new CLLDMacroFunctionParser();
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}
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}
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/**
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* Parse the given source string.
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*
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* @param string $source Source string that needs to be parsed.
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* @param int $pos Position offset.
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*/
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public function parse($source, $pos = 0) {
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$this->length = 0;
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$this->match = '';
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$p = $pos;
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if (!$this->parseLabelName($source, $p)) {
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return self::PARSE_FAIL;
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}
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$this->length = $p - $pos;
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$this->match = substr($source, $pos, $this->length);
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return isset($source[$p]) ? self::PARSE_SUCCESS_CONT : self::PARSE_SUCCESS;
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}
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/**
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* Parse label names. It must follow the [a-zA-Z_][a-zA-Z0-9_]* regular expression. User macros and LLD macros
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* are allowed.
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*
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* @param string $source [IN] Source string that needs to be parsed.
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* @param int $pos [IN/OUT] Position offset.
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*
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* @return bool
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*/
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private function parseLabelName($source, &$pos) {
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if (preg_match('/^[a-zA-Z_][a-zA-Z0-9_]*/', substr($source, $pos), $matches)) {
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$pos += strlen($matches[0]);
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return true;
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}
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elseif ($this->options['usermacros'] && $this->user_macro_parser->parse($source, $pos) != self::PARSE_FAIL) {
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$pos += $this->user_macro_parser->getLength();
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return true;
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}
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elseif ($this->options['lldmacros'] && $this->lld_macro_parser->parse($source, $pos) != self::PARSE_FAIL) {
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$pos += $this->lld_macro_parser->getLength();
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return true;
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}
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elseif ($this->options['lldmacros']
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&& $this->lld_macro_function_parser->parse($source, $pos) != self::PARSE_FAIL) {
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$pos += $this->lld_macro_function_parser->getLength();
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return true;
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}
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return false;
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}
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}
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