class.em_xmlhandler.php

Typo3, 开源里边最强大的

	}

	/**
	 * Parses content of mirrors.xml into a suitable array
	 *
	 * @param	string		XML data file to parse
	 * @return	string		HTLML output informing about result
	 */
	function parseExtensionsXML($filename) {

		$parser = xml_parser_create();
		xml_parser_set_option($parser, XML_OPTION_CASE_FOLDING, 0);
		xml_parser_set_option($parser, XML_OPTION_SKIP_WHITE, 0);
		xml_parser_set_option($parser, XML_OPTION_TARGET_ENCODING, 'utf-8');
		xml_set_element_handler($parser, array(&$this,'startElement'), array(&$this,'endElement'));
		xml_set_character_data_handler($parser, array(&$this,'characterData'));

		$fp = gzopen($filename, 'rb');
		if (!$fp)	{
			$content.= 'Error opening XML extension file "'.$filename.'"';
			return $content;
		}
		$string = gzread($fp, 0xffff);	// Read 64KB

		$this->revCatArr = array();
		$idx = 0;
		foreach ($this->emObj->defaultCategories['cat'] as $catKey => $tmp)	{
			$this->revCatArr[$catKey] = $idx++;
		}

		$this->revStateArr = array();
		$idx = 0;
		foreach ($this->emObj->states as $state => $tmp)	{
			$this->revStateArr[$state] = $idx++;
		}

		$GLOBALS['TYPO3_DB']->exec_DELETEquery('cache_extensions', '1=1');

		$extcount = 0;
		@ini_set('pcre.backtrack_limit', 500000);
		do	{
			if (preg_match('/.*(<extension\s+extensionkey="[^"]+">.*<\/extension>)/suU', $string, $match))	{
				// Parse content:
				if (!xml_parse($parser, $match[0], 0)) {
					$content.= 'Error in XML parser while decoding extensions XML file. Line '.xml_get_current_line_number($parser).': '.xml_error_string(xml_get_error_code($parser));
					$error = true;
					break;
				}
				$this->storeXMLResult();
				$this->extXMLResult = array();
				$extcount++;
				$string = substr($string, strlen($match[0]));
			} elseif(function_exists('preg_last_error') && preg_last_error())	{
				$errorcodes = array(
					0 => 'PREG_NO_ERROR',
					1 => 'PREG_INTERNAL_ERROR',
					2 => 'PREG_BACKTRACK_LIMIT_ERROR',
					3 => 'PREG_RECURSION_LIMIT_ERROR',
					4 => 'PREG_BAD_UTF8_ERROR'
				);
				$content.= 'Error in regular expression matching, code: '.$errorcodes[preg_last_error()].'<br />See <a href="http://www.php.net/manual/en/function.preg-last-error.php" target="_blank">http://www.php.net/manual/en/function.preg-last-error.php</a>';
				$error = true;
				break;
			} else	{
				if(gzeof($fp)) break; // Nothing more can be read
				$string .= gzread($fp, 0xffff);	// Read another 64KB
			}
		} while (true);

		xml_parser_free($parser);
		gzclose($fp);

		if(!$error) {
			$content.= '<p>The extensions list has been updated and now contains '.$extcount.' extension entries.</p>';
		}

		return $content;
	}

 	function storeXMLResult()	{
		foreach ($this->extXMLResult as $extkey => $extArr)	{
			$max = -1;
			$maxrev = -1;
			$last = '';
			$lastrev = '';
			$usecat = '';
			$usetitle = '';
			$usestate = '';
			$useauthorcompany = '';
			$useauthorname = '';
			$verArr = array();
			foreach ($extArr['versions'] as $version => $vArr)	{
				$iv = $this->emObj->makeVersion($version, 'int');
				if ($vArr['title']&&!$usetitle)	{
					$usetitle = $vArr['title'];
				}
				if ($vArr['state']&&!$usestate)	{
					$usestate = $vArr['state'];
				}
				if ($vArr['authorcompany']&&!$useauthorcompany)	{
					$useauthorcompany = $vArr['authorcompany'];
				}
				if ($vArr['authorname']&&!$useauthorname)	{
					$useauthorname = $vArr['authorname'];
				}
				$verArr[$version] = $iv;
				if ($iv>$max)	{
					$max = $iv;
					$last = $version;
					if ($vArr['title'])	{
						$usetitle = $vArr['title'];
					}
					if ($vArr['state'])	{
						$usestate = $vArr['state'];
					}
					if ($vArr['authorcompany'])	{
						$useauthorcompany = $vArr['authorcompany'];
					}
					if ($vArr['authorname'])	{
						$useauthorname = $vArr['authorname'];
					}
					$usecat = $vArr['category'];
				}
				if ($vArr['reviewstate'] && ($iv>$maxrev))	{
					$maxrev = $iv;
					$lastrev = $version;
				}
			}
			if (!strlen($usecat))	{
				$usecat = 4;		// Extensions without a category end up in "misc"
			} else	{
				if (isset($this->revCatArr[$usecat]))	{
					$usecat = $this->revCatArr[$usecat];
				} else	{
					$usecat = 4;		// Extensions without a category end up in "misc"
				}
			}
			if (isset($this->revStateArr[$usestate]))	{
				$usestate = $this->revCatArr[$usestate];
			} else	{
				$usestate = 999;		// Extensions without a category end up in "misc"
			}
			foreach ($extArr['versions'] as $version => $vArr)	{
				$vArr['version'] = $version;
				$vArr['intversion'] = $verArr[$version];
				$vArr['extkey'] = $extkey;
				$vArr['alldownloadcounter'] = $extArr['downloadcounter'];
				$vArr['dependencies'] = serialize($vArr['dependencies']);
				$vArr['category'] = $usecat;
				$vArr['title'] = $usetitle;
				if ($version==$last)	{
					$vArr['lastversion'] = 1;
				}
				if ($version==$lastrev)	{
					$vArr['lastreviewedversion'] = 1;
				}
				$vArr['state'] = isset($this->revStateArr[$vArr['state']])?$this->revStateArr[$vArr['state']]:$usestate;	// 999 = not set category
				$GLOBALS['TYPO3_DB']->exec_INSERTquery('cache_extensions', $vArr);
			}
		}
	}

	/**
	 * Parses content of mirrors.xml into a suitable array
	 *
	 * @param	string		$string: XML data to parse
	 * @return	string		HTLML output informing about result
	 */
	function parseMirrorsXML($string) {
		global $TYPO3_CONF_VARS;

		// Create parser:
		$parser = xml_parser_create();
		$vals = array();
		$index = array();

		xml_parser_set_option($parser, XML_OPTION_CASE_FOLDING, 0);
		xml_parser_set_option($parser, XML_OPTION_SKIP_WHITE, 0);

		if ((double)phpversion()>=5)	{
			$preg_result = array();
			preg_match('/^[[:space:]]*<\?xml[^>]*encoding[[:space:]]*=[[:space:]]*"([^"]*)"/',substr($string,0,200),$preg_result);
			$theCharset = $preg_result[1] ? $preg_result[1] : ($TYPO3_CONF_VARS['BE']['forceCharset'] ? $TYPO3_CONF_VARS['BE']['forceCharset'] : 'iso-8859-1');
			xml_parser_set_option($parser, XML_OPTION_TARGET_ENCODING, $theCharset);  // us-ascii / utf-8 / iso-8859-1
		}

		// Parse content:
		xml_parse_into_struct($parser, $string, $vals, $index);

		// If error, return error message:
		if (xml_get_error_code($parser))	{
			$line = xml_get_current_line_number($parser);
			$error = xml_error_string(xml_get_error_code($parser));
			xml_parser_free($parser);
			return 'Error in XML parser while decoding mirrors XML file. Line '.$line.': '.$error;
		} else  {
			// Init vars:
			$stack = array(array());
			$stacktop = 0;
			$mirrornumber = 0;
			$current=array();
			$tagName = '';
			$documentTag = '';

			// Traverse the parsed XML structure:
			foreach($vals as $val) {

				// First, process the tag-name (which is used in both cases, whether "complete" or "close")
				$tagName = ($val['tag']=='mirror' && $val['type']=='open') ? '__plh' : $val['tag'];
				if (!$documentTag)	$documentTag = $tagName;

				// Setting tag-values, manage stack:
				switch($val['type'])	{
					case 'open':		// If open tag it means there is an array stored in sub-elements. Therefore increase the stackpointer and reset the accumulation array:
						$current[$tagName] = array();	// Setting blank place holder
						$stack[$stacktop++] = $current;
						$current = array();
						break;
					case 'close':	// If the tag is "close" then it is an array which is closing and we decrease the stack pointer.
					$oldCurrent = $current;
					$current = $stack[--$stacktop];
					end($current);	// Going to the end of array to get placeholder key, key($current), and fill in array next:
					if($tagName=='mirror') {
						unset($current['__plh']);
						$current[$oldCurrent['host']] = $oldCurrent;
					} else {
						$current[key($current)] = $oldCurrent;
					}
					unset($oldCurrent);
					break;
					case 'complete':	// If "complete", then it's a value. If the attribute "base64" is set, then decode the value, otherwise just set it.
					$current[$tagName] = (string)$val['value']; // Had to cast it as a string - otherwise it would be evaluate false if tested with isset()!!
					break;
				}
			}
			return $current[$tagName];
		}
	}

	/**
	 * Parses content of *-l10n.xml into a suitable array
	 *
	 * @param	string		$string: XML data to parse
	 * @return	array		Array representation of XML data
	 */
	function parseL10nXML($string) {
		// Create parser:
		$parser = xml_parser_create();
		$vals = array();
		$index = array();

		xml_parser_set_option($parser, XML_OPTION_CASE_FOLDING, 0);
		xml_parser_set_option($parser, XML_OPTION_SKIP_WHITE, 0);

		// Parse content:
		xml_parse_into_struct($parser, $string, $vals, $index);

		// If error, return error message:
		if (xml_get_error_code($parser))	{
			$line = xml_get_current_line_number($parser);
			$error = xml_error_string(xml_get_error_code($parser));
			debug($error);
			xml_parser_free($parser);
			return 'Error in XML parser while decoding l10n XML file. Line '.$line.': '.$error;
		} else  {
			// Init vars:
			$stack = array(array());
			$stacktop = 0;
			$mirrornumber = 0;
			$current=array();
			$tagName = '';
			$documentTag = '';

			// Traverse the parsed XML structure:
			foreach($vals as $val) {

				// First, process the tag-name (which is used in both cases, whether "complete" or "close")
				$tagName = ($val['tag']=='languagepack' && $val['type']=='open') ? $val['attributes']['language'] : $val['tag'];
				if (!$documentTag)	$documentTag = $tagName;

				// Setting tag-values, manage stack:
				switch($val['type'])	{
					case 'open':		// If open tag it means there is an array stored in sub-elements. Therefore increase the stackpointer and reset the accumulation array:
						$current[$tagName] = array();	// Setting blank place holder
						$stack[$stacktop++] = $current;
						$current = array();
						break;
					case 'close':	// If the tag is "close" then it is an array which is closing and we decrease the stack pointer.
					$oldCurrent = $current;
					$current = $stack[--$stacktop];
					end($current);	// Going to the end of array to get placeholder key, key($current), and fill in array next:
					$current[key($current)] = $oldCurrent;
					unset($oldCurrent);
					break;
					case 'complete':	// If "complete", then it's a value. If the attribute "base64" is set, then decode the value, otherwise just set it.
					$current[$tagName] = (string)$val['value']; // Had to cast it as a string - otherwise it would be evaluate false if tested with isset()!!
					break;
				}
			}
			return $current[$tagName];
		}
	}
}
?>