diff options
Diffstat (limited to '3rdparty/fguillot/picofeed/lib/PicoFeed/Client/Favicon.php')
-rw-r--r-- | 3rdparty/fguillot/picofeed/lib/PicoFeed/Client/Favicon.php | 170 |
1 files changed, 170 insertions, 0 deletions
diff --git a/3rdparty/fguillot/picofeed/lib/PicoFeed/Client/Favicon.php b/3rdparty/fguillot/picofeed/lib/PicoFeed/Client/Favicon.php new file mode 100644 index 000000000..b6d3b6d26 --- /dev/null +++ b/3rdparty/fguillot/picofeed/lib/PicoFeed/Client/Favicon.php @@ -0,0 +1,170 @@ +<?php + +namespace PicoFeed\Client; + +use DOMXpath; + +use PicoFeed\Config\Config; +use PicoFeed\Logging\Logging; +use PicoFeed\Parser\XmlParser; + +/** + * Favicon class + * + * https://en.wikipedia.org/wiki/Favicon + * + * @author Frederic Guillot + * @package Client + */ +class Favicon +{ + /** + * Config class instance + * + * @access private + * @var \PicoFeed\Config\Config + */ + private $config; + + /** + * Icon content + * + * @access private + * @var string + */ + private $content = ''; + + /** + * Constructor + * + * @access public + * @param \PicoFeed\Config\Config $config Config class instance + */ + public function __construct(Config $config = null) + { + $this->config = $config ?: new Config; + } + + /** + * Get the icon file content (available only after the download) + * + * @access public + * @return string + */ + public function getContent() + { + return $this->content; + } + + /** + * Download and check if a resource exists + * + * @access public + * @param string $url URL + * @return string Resource content + */ + public function download($url) + { + try { + + Logging::setMessage(get_called_class().' Download => '.$url); + + $client = Client::getInstance(); + $client->setConfig($this->config); + $client->execute($url); + + return $client->getContent(); + } + catch (ClientException $e) { + return ''; + } + } + + /** + * Check if a remote file exists + * + * @access public + * @param string $url URL + * @return boolean + */ + public function exists($url) + { + return $this->download($url) !== ''; + } + + /** + * Get the icon link for a website + * + * @access public + * @param string $website_link URL + * @return string + */ + public function find($website_link) + { + $website = new Url($website_link); + + $icons = $this->extract($this->download($website->getBaseUrl('/'))); + $icons[] = $website->getBaseUrl('/favicon.ico'); + + foreach ($icons as $icon_link) { + + $icon_link = $this->convertLink($website, new Url($icon_link)); + $this->content = $this->download($icon_link); + + if ($this->content !== '') { + return $icon_link; + } + } + + return ''; + } + + /** + * Convert icon links to absolute url + * + * @access public + * @param \PicoFeed\Client\Url $website Website url + * @param \PicoFeed\Client\Url $icon Icon url + * @return string + */ + public function convertLink(Url $website, Url $icon) + { + $base_url = ''; + + if ($icon->isRelativeUrl()) { + $base_url = $website->getBaseUrl(); + } + else if ($icon->isProtocolRelative()) { + $icon->setScheme($website->getScheme()); + } + + return $icon->getAbsoluteUrl($base_url); + } + + /** + * Extract the icon links from the HTML + * + * @access public + * @param string $html HTML + * @return array + */ + public function extract($html) + { + $icons = array(); + + if (empty($html)) { + return $icons; + } + + $dom = XmlParser::getHtmlDocument($html); + + $xpath = new DOMXpath($dom); + $elements = $xpath->query("//link[contains(@rel, 'icon') and not(contains(@rel, 'apple'))]"); + + for ($i = 0; $i < $elements->length; $i++) { + $icons[] = $elements->item($i)->getAttribute('href'); + } + + return $icons; + } +} |