[add] show favicon of site
[add] fetch and cache favicon
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parent
f945bb9b05
commit
268682859a
5 changed files with 410 additions and 39 deletions
40
inc/DataAccess.php
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40
inc/DataAccess.php
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@ -0,0 +1,40 @@
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<?php
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namespace Favicon;
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/**
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* DataAccess is a wrapper used to read/write data locally or remotly
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* Aside from SOLID principles, this wrapper is also useful to mock remote resources in unit tests
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* Note: remote access warning are silenced because we don't care if a website is unreachable
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**/
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class DataAccess {
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public function retrieveUrl($url) {
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$this->set_context();
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return @file_get_contents($url);
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}
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public function retrieveHeader($url) {
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$this->set_context();
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return @get_headers($url, TRUE);
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}
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public function saveCache($file, $data) {
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file_put_contents($file, $data);
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}
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public function readCache($file) {
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return file_get_contents($file);
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}
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private function set_context() {
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stream_context_set_default(
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array(
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'http' => array(
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'method' => 'GET',
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'timeout' => 10,
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'header' => "User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:20.0; Favicon; +https://github.com/ArthurHoaro/favicon) Gecko/20100101 Firefox/32.0\r\n",
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)
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)
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);
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}
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}
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293
inc/Favicon.php
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293
inc/Favicon.php
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@ -0,0 +1,293 @@
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<?php
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namespace Favicon;
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class Favicon
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{
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protected $url = '';
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protected $cacheDir;
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protected $cacheTimeout;
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protected $dataAccess;
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public function __construct($args = array())
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{
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if (isset($args['url'])) {
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$this->url = $args['url'];
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}
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$this->cacheDir = __DIR__ . '/../../resources/cache';
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$this->dataAccess = new DataAccess();
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}
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public function cache($args = array()) {
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if (isset($args['dir'])) {
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$this->cacheDir = $args['dir'];
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}
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if (!empty($args['timeout'])) {
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$this->cacheTimeout = $args['timeout'];
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} else {
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$this->cacheTimeout = 0;
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}
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}
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public static function baseUrl($url, $path = false)
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{
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$return = '';
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if (!$url = parse_url($url)) {
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return FALSE;
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}
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// Scheme
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$scheme = isset($url['scheme']) ? strtolower($url['scheme']) : null;
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if ($scheme != 'http' && $scheme != 'https') {
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return FALSE;
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}
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$return .= "{$scheme}://";
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// Username and password
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if (isset($url['user'])) {
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$return .= $url['user'];
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if (isset($url['pass'])) {
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$return .= ":{$url['pass']}";
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}
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$return .= '@';
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}
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// Hostname
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if( !isset($url['host']) ) {
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return FALSE;
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}
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$return .= $url['host'];
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// Port
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if (isset($url['port'])) {
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$return .= ":{$url['port']}";
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}
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// Path
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if( $path && isset($url['path']) ) {
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$return .= $url['path'];
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}
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$return .= '/';
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return $return;
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}
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public function info($url)
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{
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if(empty($url) || $url === false) {
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return false;
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}
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$max_loop = 5;
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// Discover real status by following redirects.
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$loop = TRUE;
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while ($loop && $max_loop-- > 0) {
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$headers = $this->dataAccess->retrieveHeader($url);
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$exploded = explode(' ', $headers[0]);
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if( !isset($exploded[1]) ) {
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return false;
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}
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list(,$status) = $exploded;
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switch ($status) {
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case '301':
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case '302':
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$url = $headers['Location'];
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break;
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default:
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$loop = FALSE;
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break;
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}
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}
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return array('status' => $status, 'url' => $url);
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}
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public function endRedirect($url) {
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$out = $this->info($url);
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return !empty($out['url']) ? $out['url'] : false;
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}
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/**
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* Find remote (or cached) favicon
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* @return favicon URL, false if nothing was found
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**/
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public function get($url = '')
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{
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// URLs passed to this method take precedence.
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if (!empty($url)) {
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$this->url = $url;
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}
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// Get the base URL without the path for clearer concatenations.
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$original = rtrim($this->baseUrl($this->url, true), '/');
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$url = rtrim($this->endRedirect($this->baseUrl($this->url, false)), '/');
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if(($favicon = $this->checkCache($url)) || ($favicon = $this->getFavicon($url))) {
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$base = true;
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}
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elseif(($favicon = $this->checkCache($original)) || ($favicon = $this->getFavicon($original, false))) {
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$base = false;
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}
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else
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return false;
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// Save cache if necessary
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$cache = $this->cacheDir . '/' . md5($base ? $url : $original);
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if ($this->cacheTimeout && !file_exists($cache) || (is_writable($cache) && time() - filemtime($cache) > $this->cacheTimeout)) {
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$this->dataAccess->saveCache($cache, $favicon);
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}
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return $favicon;
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}
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private function getFavicon($url, $checkDefault = true) {
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$favicon = false;
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if(empty($url)) {
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return false;
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}
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// Try /favicon.ico first.
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if( $checkDefault ) {
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$info = $this->info("{$url}/favicon.ico");
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if ($info['status'] == '200') {
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$favicon = $info['url'];
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}
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}
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// See if it's specified in a link tag in domain url.
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if (!$favicon) {
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$favicon = $this->getInPage($url);
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}
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// Make sure the favicon is an absolute URL.
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if( $favicon && filter_var($favicon, FILTER_VALIDATE_URL) === false ) {
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$favicon = $url . '/' . $favicon;
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}
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// Sometimes people lie, so check the status.
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// And sometimes, it's not even an image. Sneaky bastards!
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// If cacheDir isn't writable, that's not our problem
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if ($favicon && is_writable($this->cacheDir) && !$this->checkImageMType($favicon)) {
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$favicon = false;
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}
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return $favicon;
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}
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private function getInPage($url) {
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$html = $this->dataAccess->retrieveUrl("{$url}/");
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preg_match('!<head.*?>.*</head>!ims', $html, $match);
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if(empty($match) || count($match) == 0) {
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return false;
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}
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$head = $match[0];
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$dom = new \DOMDocument();
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// Use error supression, because the HTML might be too malformed.
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if (@$dom->loadHTML($head)) {
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$links = $dom->getElementsByTagName('link');
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foreach ($links as $link) {
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if ($link->hasAttribute('rel') && strtolower($link->getAttribute('rel')) == 'shortcut icon') {
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return $link->getAttribute('href');
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} elseif ($link->hasAttribute('rel') && strtolower($link->getAttribute('rel')) == 'icon') {
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return $link->getAttribute('href');
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} elseif ($link->hasAttribute('href') && strpos($link->getAttribute('href'), 'favicon') !== FALSE) {
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return $link->getAttribute('href');
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}
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}
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}
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return false;
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}
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private function checkCache($url) {
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if ($this->cacheTimeout) {
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$cache = $this->cacheDir . '/' . md5($url);
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if (file_exists($cache) && is_readable($cache) && (time() - filemtime($cache) < $this->cacheTimeout)) {
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return $this->dataAccess->readCache($cache);
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}
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}
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return false;
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}
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private function checkImageMType($url) {
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$tmpFile = $this->cacheDir . '/tmp.ico';
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$fileContent = $this->dataAccess->retrieveUrl($url);
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$this->dataAccess->saveCache($tmpFile, $fileContent);
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$finfo = finfo_open(FILEINFO_MIME_TYPE);
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$isImage = strpos(finfo_file($finfo, $tmpFile), 'image') !== false;
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finfo_close($finfo);
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unlink($tmpFile);
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return $isImage;
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}
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/**
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* @return mixed
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*/
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public function getCacheDir()
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{
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return $this->cacheDir;
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}
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/**
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* @param mixed $cacheDir
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*/
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public function setCacheDir($cacheDir)
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{
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$this->cacheDir = $cacheDir;
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}
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/**
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* @return mixed
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*/
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public function getCacheTimeout()
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{
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return $this->cacheTimeout;
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}
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/**
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* @param mixed $cacheTimeout
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*/
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public function setCacheTimeout($cacheTimeout)
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{
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$this->cacheTimeout = $cacheTimeout;
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}
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/**
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* @return string
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*/
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public function getUrl()
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{
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return $this->url;
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}
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/**
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* @param string $url
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*/
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public function setUrl($url)
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{
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$this->url = $url;
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}
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/**
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* @param DataAccess $dataAccess
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*/
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public function setDataAccess($dataAccess)
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{
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$this->dataAccess = $dataAccess;
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}
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}
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@ -282,7 +282,7 @@ font-size:9pt;
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.thumbnail { float:left; margin-right: 10px; }
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.linkcontainer { position: static; margin-left:130px; }
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*/
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.favicon {width:16px;height:16px;margin-right:0.1em;}
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38
index.php
38
index.php
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@ -22,9 +22,11 @@
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$GLOBALS['config']['OPEN_SHAARLI'] = false; // If true, anyone can add/edit/delete links without having to login
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$GLOBALS['config']['HIDE_TIMESTAMPS'] = false; // If true, the moment when links were saved are not shown to users that are not logged in.
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$GLOBALS['config']['ENABLE_THUMBNAILS'] = true; // Enable thumbnails in links.
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$GLOBALS['config']['ENABLE_FAVICON'] = true; // Enable favicon in links.
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$GLOBALS['config']['CACHEDIR'] = 'cache'; // Cache directory for thumbnails for SLOW services (like flickr)
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$GLOBALS['config']['PAGECACHE'] = 'pagecache'; // Page cache directory.
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$GLOBALS['config']['ENABLE_LOCALCACHE'] = true; // Enable Shaarli to store thumbnail in a local cache. Disable to reduce webspace usage.
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// Care if favicon is active and local cache are false serve page can be long
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$GLOBALS['config']['PUBSUBHUB_URL'] = ''; // PubSubHubbub support. Put an empty string to disable, or put your hub url here to enable.
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$GLOBALS['config']['UPDATECHECK_FILENAME'] = $GLOBALS['config']['DATADIR'].'/lastupdatecheck.txt'; // For updates check of Shaarli.
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$GLOBALS['config']['UPDATECHECK_INTERVAL'] = 86400 ; // Updates check frequency for Shaarli. 86400 seconds=24 hours
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@ -2052,6 +2054,42 @@ function lazyThumbnail($url,$href=false)
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return $html;
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}
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function returnFavicon($url){
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if(!$GLOBALS['config']['ENABLE_FAVICON']){
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return;
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}
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$faviconHash = md5($url);
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$path = substr($faviconHash, 0,2).'/'.substr($faviconHash, 2,2);
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$faviconPath = $GLOBALS['config']['CACHEDIR'].'/'.$path.'/'.$faviconHash.'.ico';
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if($GLOBALS['config']['ENABLE_LOCALCACHE'] === true && file_exists($faviconPath)){
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$content = file_get_contents($faviconPath);
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return '<img class="favicon" alt="favicon" src="data:image/ico;base64,'.base64_encode($content).'"/>';
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}
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if(file_exists($GLOBALS['config']['CACHEDIR'].'/'.$path.'/'.$faviconHash)){
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return;
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}
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require_once 'inc/DataAccess.php';
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require_once 'inc/Favicon.php';
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$favicon = new \Favicon\Favicon();
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$urlOfFavicon = $favicon->get($url);
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if(!$urlOfFavicon){
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if($GLOBALS['config']['ENABLE_LOCALCACHE'] === true){
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mkdir($GLOBALS['config']['CACHEDIR'].'/'.$path,0777,true);
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touch($GLOBALS['config']['CACHEDIR'].'/'.$path.'/'.$faviconHash);
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return;
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} else {
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return;
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}
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}
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if($GLOBALS['config']['ENABLE_LOCALCACHE'] === true && !is_dir($GLOBALS['config']['CACHEDIR'].'/'.$path.'/')){
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mkdir($GLOBALS['config']['CACHEDIR'].'/'.$path,0777,true);
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}
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$content = file_get_contents($urlOfFavicon);
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if($GLOBALS['config']['ENABLE_LOCALCACHE'] === true){
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file_put_contents($faviconPath, $content);
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}
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return '<img class="favicon" alt="favicon" src="data:image/ico;base64,'.base64_encode($content).'"/>';
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}
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// -----------------------------------------------------------------------------------------------
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// Installation
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@ -40,7 +40,7 @@
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<input type="hidden" name="token" value="{$token}"><input type="hidden" name="delete_link"><input type="image" alt="Delete" src="images/delete_icon.png#" title="Delete" class="button_delete" onClick="return confirmDeleteLink();"></form>
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</div>
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{/if}
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<span class="linktitle"><a href="{$redirector}{$value.url|htmlspecialchars}">{$value.title|htmlspecialchars}</a></span>
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<span class="linktitle">{function="returnFavicon($value.url)"}<a href="{$redirector}{$value.url|htmlspecialchars}">{$value.title|htmlspecialchars}</a></span>
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<br>
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{if="$value.description"}<div class="linkdescription"{if condition="$search_type=='permalink'"} style="max-height:none !important;"{/if}>{$value.description}</div>{/if}
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{if="!$GLOBALS['config']['HIDE_TIMESTAMPS'] || isLoggedIn()"}
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