109 lines
2.9 KiB
PHP
109 lines
2.9 KiB
PHP
<?php
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namespace PicoFeed;
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require_once __DIR__.'/Logging.php';
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require_once __DIR__.'/Filter.php';
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require_once __DIR__.'/Encoding.php';
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require_once __DIR__.'/Grabber.php';
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abstract class Parser
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{
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protected $content = '';
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public $id = '';
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public $url = '';
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public $title = '';
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public $updated = '';
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public $items = array();
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public $grabber = false;
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public $grabber_ignore_urls = array();
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public $grabber_timeout = null;
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public $grabber_user_agent = null;
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abstract public function execute();
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public function __construct($content, $http_encoding = '')
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{
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$xml_encoding = Filter::getEncodingFromXmlTag($content);
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Logging::log(\get_called_class().': HTTP Encoding "'.$http_encoding.'" ; XML Encoding "'.$xml_encoding.'"');
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// Strip XML tag to avoid multiple encoding/decoding in the next XML processing
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$this->content = Filter::stripXmlTag($content);
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// Encode everything in UTF-8
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if ($xml_encoding == 'windows-1251' || $http_encoding == 'windows-1251') {
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$this->content = Encoding::cp1251ToUtf8($this->content);
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}
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else {
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$this->content = Encoding::toUTF8($this->content);
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}
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// Workarounds
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$this->content = $this->normalizeData($this->content);
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}
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public function filterHtml($item_content, $item_url)
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{
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$content = '';
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if ($this->grabber && ! in_array($item_url, $this->grabber_ignore_urls)) {
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$grabber = new Grabber($item_url);
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$grabber->download($this->grabber_timeout, $this->grabber_user_agent);
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if ($grabber->parse()) $item_content = $grabber->content;
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}
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if ($item_content) {
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$filter = new Filter($item_content, $item_url);
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$content = $filter->execute();
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}
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return $content;
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}
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public function getXmlErrors()
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{
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$errors = array();
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foreach(\libxml_get_errors() as $error) {
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$errors[] = sprintf('XML error: %s (Line: %d - Column: %d - Code: %d)',
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$error->message,
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$error->line,
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$error->column,
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$error->code
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);
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}
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return implode(', ', $errors);
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}
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// Dirty quickfix before XML parsing
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public function normalizeData($data)
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{
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return str_replace("\xc3\x20", '', $data);
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}
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// Trim whitespace from the begining, the end and inside a string and don't break utf-8 string
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public function stripWhiteSpace($value)
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{
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$value = str_replace("\r", "", $value);
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$value = str_replace("\t", "", $value);
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$value = str_replace("\n", "", $value);
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return trim($value);
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}
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public function generateId()
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{
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// crc32b seems to be faster and shorter than other hash algorithms
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return hash('crc32b', implode(func_get_args()));
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}
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}
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