miniflux-legacy/vendor/PicoFeed/Parser.php

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<?php
namespace PicoFeed;
require_once __DIR__.'/Logging.php';
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require_once __DIR__.'/Filter.php';
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require_once __DIR__.'/Encoding.php';
require_once __DIR__.'/Grabber.php';
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abstract class Parser
{
protected $content = '';
public $id = '';
public $url = '';
public $title = '';
public $updated = '';
public $items = array();
public $grabber = false;
public $grabber_ignore_urls = array();
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public $grabber_timeout = null;
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($content);
Logging::log(\get_called_class().': HTTP Encoding "'.$http_encoding.'" ; XML Encoding "'.$xml_encoding.'"');
// Strip XML tag to avoid multiple encoding/decoding in the next XML processing
$this->content = Filter::stripXmlTag($content);
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// Encode everything in UTF-8
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if ($xml_encoding == 'windows-1251' || $http_encoding == 'windows-1251') {
$this->content = Encoding::cp1251ToUtf8($this->content);
}
else {
$this->content = Encoding::toUTF8($this->content);
}
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// Workarounds
$this->content = $this->normalizeData($this->content);
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}
public function filterHtml($item_content, $item_url)
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{
$content = '';
if ($this->grabber && ! in_array($item_url, $this->grabber_ignore_urls)) {
$grabber = new Grabber($item_url);
$grabber->download($this->grabber_timeout, $this->grabber_user_agent);
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if ($grabber->parse()) $item_content = $grabber->content;
}
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if ($item_content) {
$filter = new Filter($item_content, $item_url);
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$content = $filter->execute();
}
return $content;
}
public function getXmlErrors()
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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,
$error->line,
$error->column,
$error->code
);
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}
return implode(', ', $errors);
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}
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// Dirty quickfix before XML parsing
public function normalizeData($data)
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{
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return str_replace("\xc3\x20", '', $data);
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}
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// Trim whitespace from the begining, the end and inside a string and don't break utf-8 string
public function stripWhiteSpace($value)
{
$value = str_replace("\r", "", $value);
$value = str_replace("\t", "", $value);
$value = str_replace("\n", "", $value);
return trim($value);
}
public function generateId()
{
// crc32b seems to be faster and shorter than other hash algorithms
return hash('crc32b', implode(func_get_args()));
}
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public function parseDate($value)
{
// Format => truncate to this length if not null
$formats = array(
DATE_ATOM => null,
DATE_RSS => null,
DATE_COOKIE => null,
DATE_ISO8601 => null,
DATE_RFC822 => null,
DATE_RFC850 => null,
DATE_RFC1036 => null,
DATE_RFC1123 => null,
DATE_RFC2822 => null,
DATE_RFC3339 => null,
'D, d M Y H:i:s' => 25,
'D, d M Y h:i:s' => 25,
'D M d Y H:i:s' => 24,
'Y-m-d H:i:s' => 19,
'Y-m-d\TH:i:s' => 19,
'd/m/Y H:i:s' => 19,
'D, d M Y' => 16,
'Y-m-d' => 10,
'd-m-Y' => 10,
'm-d-Y' => 10,
'd.m.Y' => 10,
'm.d.Y' => 10,
'd/m/Y' => 10,
'm/d/Y' => 10,
);
$value = trim($value);
foreach ($formats as $format => $length) {
$timestamp = $this->getValidDate($format, substr($value, 0, $length));
if ($timestamp > 0) return $timestamp;
}
return time();
}
public function getValidDate($format, $value)
{
$date = \DateTime::createFromFormat($format, $value);
if ($date !== false) {
$errors = \DateTime::getLastErrors();
if ($errors['error_count'] === 0 && $errors['warning_count'] === 0) return $date->getTimestamp();
}
return 0;
}
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}