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Use web-thumbnailer to retrieve thumbnails 

* requires PHP 5.6
  * use blazy on linklist since a lot more thumbs are retrieved
  * thumbnails can be disabled
  * thumbs size is now 120x120
  * thumbs are now cropped to fit the expected size

Fixes #345 #425 #487 #543 #588 #590
This commit is contained in:
ArthurHoaro 2016-11-09 18:57:02 +01:00
parent edb4a4d9c9
commit 1b93137e16
12 changed files with 222 additions and 427 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
application/PageBuilder.php
View File

@ -105,6 +105,11 @@ class PageBuilder
if ($this->linkDB !== null) {
$this->tpl->assign('tags', $this->linkDB->linksCountPerTag());
}
$this->tpl->assign('thumbnails_enabled', $this->conf->get('thumbnails.enabled'));
$this->tpl->assign('thumbnails_width', $this->conf->get('thumbnails.width'));
$this->tpl->assign('thumbnails_height', $this->conf->get('thumbnails.height'));
// To be removed with a proper theme configuration.
$this->tpl->assign('conf', $this->conf);
}

49
application/Thumbnailer.php Normal file
View File

@ -0,0 +1,49 @@
<?php
use WebThumbnailer\WebThumbnailer;
/**
* Class Thumbnailer
*
* Utility class used to retrieve thumbnails using web-thumbnailer dependency.
*/
class Thumbnailer
{
/**
* @var WebThumbnailer instance.
*/
protected $wt;
/**
* @var ConfigManager instance.
*/
protected $conf;
/**
* Thumbnailer constructor.
*
* @param ConfigManager $conf instance.
*/
public function __construct($conf)
{
$this->conf = $conf;
$this->wt = new WebThumbnailer();
\WebThumbnailer\Application\ConfigManager::addFile('inc/web-thumbnailer.json');
$this->wt->maxWidth($this->conf->get('thumbnails.width'))
->maxHeight($this->conf->get('thumbnails.height'))
->crop(true)
->debug($this->conf->get('dev.debug', false));
}
/**
* Retrieve a thumbnail for given URL
*
* @param string $url where to look for a thumbnail.
*
* @return bool|string The thumbnail relative cache file path, or false if none has been found.
*/
public function get($url)
{
return $this->wt->thumbnail($url);
}
}

4
application/config/ConfigManager.php
View File

@ -319,6 +319,10 @@ class ConfigManager
$this->setEmpty('general.enabled_plugins', self::$DEFAULT_PLUGINS);
$this->setEmpty('general.default_note_title', 'Note: ');
$this->setEmpty('thumbnails.enabled', true);
$this->setEmpty('thumbnails.width', 120);
$this->setEmpty('thumbnails.height', 120);
$this->setEmpty('updates.check_updates', false);
$this->setEmpty('updates.check_updates_branch', 'stable');
$this->setEmpty('updates.check_updates_interval', 86400);

8
assets/vintage/css/shaarli.css
View File

@ -701,8 +701,8 @@ a.bigbutton, #pageheader a.bigbutton {
position: relative;
display: table-cell;
vertical-align: middle;
width: 90px;
height: 90px;
width: 120px;
height: 120px;
overflow: hidden;
text-align: center;
float: left;
@ -739,9 +739,9 @@ a.bigbutton, #pageheader a.bigbutton {
position: absolute;
top: 0;
left: 0;
width: 90px;
width: 120px;
font-weight: bold;
font-size: 8pt;
font-size: 9pt;
color: #fff;
text-align: left;
background-color: transparent;

1
composer.json
View File

@ -19,6 +19,7 @@
"shaarli/netscape-bookmark-parser": "^2.0",
"erusev/parsedown": "^1.6",
"slim/slim": "^3.0",
"arthurhoaro/web-thumbnailer": "dev-master",
"pubsubhubbub/publisher": "dev-master",
"gettext/gettext": "^4.4"
},

9
inc/web-thumbnailer.json Normal file
View File

@ -0,0 +1,9 @@
{
"settings": {
"default": {
"_comment": "infinite cache",
"cache_duration": -1,
"timeout": 60
}
}
}

490
index.php
View File

@ -74,6 +74,7 @@ require_once 'application/Url.php';
require_once 'application/Utils.php';
require_once 'application/PluginManager.php';
require_once 'application/Router.php';
require_once 'application/Thumbnailer.php';
require_once 'application/Updater.php';
use \Shaarli\Languages;
use \Shaarli\ThemeUtils;
@ -601,20 +602,52 @@ function renderPage($conf, $pluginManager, $LINKSDB, $history, $sessionManager,
// -------- Picture wall
if ($targetPage == Router::$PAGE_PICWALL)
{
if (! $conf->get('thumbnails.enabled')) {
header('Location: ?');
exit;
}
// Optionally filter the results:
$links = $LINKSDB->filterSearch($_GET);
$linksToDisplay = array();
$thumbnailer = new Thumbnailer($conf);
$cpt = 0;
// Get only links which have a thumbnail.
foreach($links as $link)
{
$permalink='?'.$link['shorturl'];
$thumb=lazyThumbnail($conf, $link['url'],$permalink);
if ($thumb!='') // Only output links which have a thumbnail.
{
$link['thumbnail']=$thumb; // Thumbnail HTML code.
$linksToDisplay[]=$link; // Add to array.
// Not a note,
// and (never retrieved yet or no valid cache file)
if ($link['url'][0] != '?'
&& (! isset($link['thumbnail']) || ($link['thumbnail'] !== false && ! is_file($link['thumbnail'])))
) {
$link['thumbnail'] = $thumbnailer->get($link['url']);
// FIXME! we really need to get rid of ArrayAccess...
$item = $LINKSDB[$link['linkdate']];
$item['thumbnail'] = $link['thumbnail'];
$LINKSDB[$link['linkdate']] = $item;
$updateDB = true;
$cpt++;
}
if (isset($link['thumbnail']) && $link['thumbnail'] !== false) {
$linksToDisplay[] = $link; // Add to array.
}
// If we retrieved new thumbnails, we update the database every 20 links.
// Downloading everything the first time may take a very long time
if (!empty($updateDB) && $cpt == 20) {
$LINKSDB->save($conf->get('resource.page_cache'));
$updateDB = false;
$cpt = 0;
}
}
if (!empty($updateDB)) {
$LINKSDB->save($conf->get('resource.page_cache'));
}
$data = array(
@ -1008,6 +1041,7 @@ function renderPage($conf, $pluginManager, $LINKSDB, $history, $sessionManager,
$conf->set('api.enabled', !empty($_POST['enableApi']));
$conf->set('api.secret', escape($_POST['apiSecret']));
$conf->set('translation.language', escape($_POST['language']));
$conf->set('thumbnails.enabled', !empty($_POST['enableThumbnails']));
try {
$conf->write($loginManager->isLoggedIn());
@ -1148,6 +1182,11 @@ function renderPage($conf, $pluginManager, $LINKSDB, $history, $sessionManager,
$link['title'] = $link['url'];
}
if ($conf->get('thumbnails.enabled')) {
$thumbnailer = new Thumbnailer($conf);
$link['thumbnail'] = $thumbnailer->get($url);
}
$pluginManager->executeHooks('save_link', $link);
$LINKSDB[$id] = $link;
@ -1549,6 +1588,11 @@ function buildLinkList($PAGE, $LINKSDB, $conf, $pluginManager, $loginManager)
// Start index.
$i = ($page-1) * $_SESSION['LINKS_PER_PAGE'];
$end = $i + $_SESSION['LINKS_PER_PAGE'];
if ($conf->get('thumbnails.enabled')) {
$thumbnailer = new Thumbnailer($conf);
}
$linkDisp = array();
while ($i<$end && $i<count($keys))
{
@ -1569,9 +1613,22 @@ function buildLinkList($PAGE, $LINKSDB, $conf, $pluginManager, $loginManager)
$taglist = preg_split('/\s+/', $link['tags'], -1, PREG_SPLIT_NO_EMPTY);
uasort($taglist, 'strcasecmp');
$link['taglist'] = $taglist;
// Thumbnails enabled, not a note,
// and (never retrieved yet or no valid cache file)
if ($conf->get('thumbnails.enabled') && $link['url'][0] != '?'
&& (! isset($link['thumbnail']) || ($link['thumbnail'] !== false && ! is_file($link['thumbnail'])))
) {
$link['thumbnail'] = $thumbnailer->get($link['url']);
// FIXME! we really need to get rid of ArrayAccess...
$item = $LINKSDB[$keys[$i]];
$item['thumbnail'] = $link['thumbnail'];
$LINKSDB[$keys[$i]] = $item;
$updateDB = true;
}
// Check for both signs of a note: starting with ? and 7 chars long.
if ($link['url'][0] === '?' &&
strlen($link['url']) === 7) {
if ($link['url'][0] === '?' && strlen($link['url']) === 7) {
$link['url'] = index_url($_SERVER) . $link['url'];
}
@ -1579,6 +1636,11 @@ function buildLinkList($PAGE, $LINKSDB, $conf, $pluginManager, $loginManager)
$i++;
}
// If we retrieved new thumbnails, we update the database.
if (!empty($updateDB)) {
$LINKSDB->save($conf->get('resource.page_cache'));
}
// Compute paging navigation
$searchtagsUrl = $searchtags === '' ? '' : '&searchtags=' . urlencode($searchtags);
$searchtermUrl = empty($searchterm) ? '' : '&searchterm=' . urlencode($searchterm);
@ -1629,194 +1691,6 @@ function buildLinkList($PAGE, $LINKSDB, $conf, $pluginManager, $loginManager)
return;
}
/**
* Compute the thumbnail for a link.
*
* With a link to the original URL.
* Understands various services (youtube.com...)
* Input: $url = URL for which the thumbnail must be found.
* $href = if provided, this URL will be followed instead of $url
* Returns an associative array with thumbnail attributes (src,href,width,height,style,alt)
* Some of them may be missing.
* Return an empty array if no thumbnail available.
*
* @param ConfigManager $conf Configuration Manager instance.
* @param string $url
* @param string|bool $href
*
* @return array
*/
function computeThumbnail($conf, $url, $href = false)
{
if (!$conf->get('thumbnail.enable_thumbnails')) return array();
if ($href==false) $href=$url;
// For most hosts, the URL of the thumbnail can be easily deduced from the URL of the link.
// (e.g. http://www.youtube.com/watch?v=spVypYk4kto ---> http://img.youtube.com/vi/spVypYk4kto/default.jpg )
// ^^^^^^^^^^^ ^^^^^^^^^^^
$domain = parse_url($url,PHP_URL_HOST);
if ($domain=='youtube.com' || $domain=='www.youtube.com')
{
parse_str(parse_url($url,PHP_URL_QUERY), $params); // Extract video ID and get thumbnail
if (!empty($params['v'])) return array('src'=>'https://img.youtube.com/vi/'.$params['v'].'/default.jpg',
'href'=>$href,'width'=>'120','height'=>'90','alt'=>'YouTube thumbnail');
}
if ($domain=='youtu.be') // Youtube short links
{
$path = parse_url($url,PHP_URL_PATH);
return array('src'=>'https://img.youtube.com/vi'.$path.'/default.jpg',
'href'=>$href,'width'=>'120','height'=>'90','alt'=>'YouTube thumbnail');
}
if ($domain=='pix.toile-libre.org') // pix.toile-libre.org image hosting
{
parse_str(parse_url($url,PHP_URL_QUERY), $params); // Extract image filename.
if (!empty($params) && !empty($params['img'])) return array('src'=>'http://pix.toile-libre.org/upload/thumb/'.urlencode($params['img']),
'href'=>$href,'style'=>'max-width:120px; max-height:150px','alt'=>'pix.toile-libre.org thumbnail');
}
if ($domain=='imgur.com')
{
$path = parse_url($url,PHP_URL_PATH);
if (startsWith($path,'/a/')) return array(); // Thumbnails for albums are not available.
if (startsWith($path,'/r/')) return array('src'=>'https://i.imgur.com/'.basename($path).'s.jpg',
'href'=>$href,'width'=>'90','height'=>'90','alt'=>'imgur.com thumbnail');
if (startsWith($path,'/gallery/')) return array('src'=>'https://i.imgur.com'.substr($path,8).'s.jpg',
'href'=>$href,'width'=>'90','height'=>'90','alt'=>'imgur.com thumbnail');
if (substr_count($path,'/')==1) return array('src'=>'https://i.imgur.com/'.substr($path,1).'s.jpg',
'href'=>$href,'width'=>'90','height'=>'90','alt'=>'imgur.com thumbnail');
}
if ($domain=='i.imgur.com')
{
$pi = pathinfo(parse_url($url,PHP_URL_PATH));
if (!empty($pi['filename'])) return array('src'=>'https://i.imgur.com/'.$pi['filename'].'s.jpg',
'href'=>$href,'width'=>'90','height'=>'90','alt'=>'imgur.com thumbnail');
}
if ($domain=='dailymotion.com' || $domain=='www.dailymotion.com')
{
if (strpos($url,'dailymotion.com/video/')!==false)
{
$thumburl=str_replace('dailymotion.com/video/','dailymotion.com/thumbnail/video/',$url);
return array('src'=>$thumburl,
'href'=>$href,'width'=>'120','style'=>'height:auto;','alt'=>'DailyMotion thumbnail');
}
}
if (endsWith($domain,'.imageshack.us'))
{
$ext=strtolower(pathinfo($url,PATHINFO_EXTENSION));
if ($ext=='jpg' || $ext=='jpeg' || $ext=='png' || $ext=='gif')
{
$thumburl = substr($url,0,strlen($url)-strlen($ext)).'th.'.$ext;
return array('src'=>$thumburl,
'href'=>$href,'width'=>'120','style'=>'height:auto;','alt'=>'imageshack.us thumbnail');
}
}
// Some other hosts are SLOW AS HELL and usually require an extra HTTP request to get the thumbnail URL.
// So we deport the thumbnail generation in order not to slow down page generation
// (and we also cache the thumbnail)
if (! $conf->get('thumbnail.enable_localcache')) return array(); // If local cache is disabled, no thumbnails for services which require the use a local cache.
if ($domain=='flickr.com' || endsWith($domain,'.flickr.com')
|| $domain=='vimeo.com'
|| $domain=='ted.com' || endsWith($domain,'.ted.com')
|| $domain=='xkcd.com' || endsWith($domain,'.xkcd.com')
)
{
if ($domain=='vimeo.com')
{ // Make sure this vimeo URL points to a video (/xxx... where xxx is numeric)
$path = parse_url($url,PHP_URL_PATH);
if (!preg_match('!/\d+.+?!',$path)) return array(); // This is not a single video URL.
}
if ($domain=='xkcd.com' || endsWith($domain,'.xkcd.com'))
{ // Make sure this URL points to a single comic (/xxx... where xxx is numeric)
$path = parse_url($url,PHP_URL_PATH);
if (!preg_match('!/\d+.+?!',$path)) return array();
}
if ($domain=='ted.com' || endsWith($domain,'.ted.com'))
{ // Make sure this TED URL points to a video (/talks/...)
$path = parse_url($url,PHP_URL_PATH);
if ("/talks/" !== substr($path,0,7)) return array(); // This is not a single video URL.
}
$sign = hash_hmac('sha256', $url, $conf->get('credentials.salt')); // We use the salt to sign data (it's random, secret, and specific to each installation)
return array('src'=>index_url($_SERVER).'?do=genthumbnail&hmac='.$sign.'&url='.urlencode($url),
'href'=>$href,'width'=>'120','style'=>'height:auto;','alt'=>'thumbnail');
}
// For all other, we try to make a thumbnail of links ending with .jpg/jpeg/png/gif
// Technically speaking, we should download ALL links and check their Content-Type to see if they are images.
// But using the extension will do.
$ext=strtolower(pathinfo($url,PATHINFO_EXTENSION));
if ($ext=='jpg' || $ext=='jpeg' || $ext=='png' || $ext=='gif')
{
$sign = hash_hmac('sha256', $url, $conf->get('credentials.salt')); // We use the salt to sign data (it's random, secret, and specific to each installation)
return array('src'=>index_url($_SERVER).'?do=genthumbnail&hmac='.$sign.'&url='.urlencode($url),
'href'=>$href,'width'=>'120','style'=>'height:auto;','alt'=>'thumbnail');
}
return array(); // No thumbnail.
}
// Returns the HTML code to display a thumbnail for a link
// with a link to the original URL.
// Understands various services (youtube.com...)
// Input: $url = URL for which the thumbnail must be found.
// $href = if provided, this URL will be followed instead of $url
// Returns '' if no thumbnail available.
function thumbnail($url,$href=false)
{
// FIXME!
global $conf;
$t = computeThumbnail($conf, $url,$href);
if (count($t)==0) return ''; // Empty array = no thumbnail for this URL.
$html='<a href="'.escape($t['href']).'"><img src="'.escape($t['src']).'"';
if (!empty($t['width'])) $html.=' width="'.escape($t['width']).'"';
if (!empty($t['height'])) $html.=' height="'.escape($t['height']).'"';
if (!empty($t['style'])) $html.=' style="'.escape($t['style']).'"';
if (!empty($t['alt'])) $html.=' alt="'.escape($t['alt']).'"';
$html.='></a>';
return $html;
}
// Returns the HTML code to display a thumbnail for a link
// for the picture wall (using lazy image loading)
// Understands various services (youtube.com...)
// Input: $url = URL for which the thumbnail must be found.
// $href = if provided, this URL will be followed instead of $url
// Returns '' if no thumbnail available.
function lazyThumbnail($conf, $url,$href=false)
{
// FIXME!
global $conf;
$t = computeThumbnail($conf, $url,$href);
if (count($t)==0) return ''; // Empty array = no thumbnail for this URL.
$html='<a href="'.escape($t['href']).'">';
// Lazy image
$html.='<img class="b-lazy" src="#" data-src="'.escape($t['src']).'"';
if (!empty($t['width'])) $html.=' width="'.escape($t['width']).'"';
if (!empty($t['height'])) $html.=' height="'.escape($t['height']).'"';
if (!empty($t['style'])) $html.=' style="'.escape($t['style']).'"';
if (!empty($t['alt'])) $html.=' alt="'.escape($t['alt']).'"';
$html.='>';
// No-JavaScript fallback.
$html.='<noscript><img src="'.escape($t['src']).'"';
if (!empty($t['width'])) $html.=' width="'.escape($t['width']).'"';
if (!empty($t['height'])) $html.=' height="'.escape($t['height']).'"';
if (!empty($t['style'])) $html.=' style="'.escape($t['style']).'"';
if (!empty($t['alt'])) $html.=' alt="'.escape($t['alt']).'"';
$html.='></noscript></a>';
return $html;
}
/**
* Installation
* This function should NEVER be called if the file data/config.php exists.
@ -1917,232 +1791,6 @@ function install($conf, $sessionManager, $loginManager) {
exit;
}
/**
* Because some f*cking services like flickr require an extra HTTP request to get the thumbnail URL,
* I have deported the thumbnail URL code generation here, otherwise this would slow down page generation.
* The following function takes the URL a link (e.g. a flickr page) and return the proper thumbnail.
* This function is called by passing the URL:
* http://mywebsite.com/shaarli/?do=genthumbnail&hmac=[HMAC]&url=[URL]
* [URL] is the URL of the link (e.g. a flickr page)
* [HMAC] is the signature for the [URL] (so that these URL cannot be forged).
* The function below will fetch the image from the webservice and store it in the cache.
*
* @param ConfigManager $conf Configuration Manager instance,
*/
function genThumbnail($conf)
{
// Make sure the parameters in the URL were generated by us.
$sign = hash_hmac('sha256', $_GET['url'], $conf->get('credentials.salt'));
if ($sign!=$_GET['hmac']) die('Naughty boy!');
$cacheDir = $conf->get('resource.thumbnails_cache', 'cache');
// Let's see if we don't already have the image for this URL in the cache.
$thumbname=hash('sha1',$_GET['url']).'.jpg';
if (is_file($cacheDir .'/'. $thumbname))
{ // We have the thumbnail, just serve it:
header('Content-Type: image/jpeg');
echo file_get_contents($cacheDir .'/'. $thumbname);
return;
}
// We may also serve a blank image (if service did not respond)
$blankname=hash('sha1',$_GET['url']).'.gif';
if (is_file($cacheDir .'/'. $blankname))
{
header('Content-Type: image/gif');
echo file_get_contents($cacheDir .'/'. $blankname);
return;
}
// Otherwise, generate the thumbnail.
$url = $_GET['url'];
$domain = parse_url($url,PHP_URL_HOST);
if ($domain=='flickr.com' || endsWith($domain,'.flickr.com'))
{
// Crude replacement to handle new flickr domain policy (They prefer www. now)
$url = str_replace('http://flickr.com/','http://www.flickr.com/',$url);
// Is this a link to an image, or to a flickr page ?
$imageurl='';
if (endsWith(parse_url($url, PHP_URL_PATH), '.jpg'))
{ // This is a direct link to an image. e.g. http://farm1.staticflickr.com/5/5921913_ac83ed27bd_o.jpg
preg_match('!(http://farm\d+\.staticflickr\.com/\d+/\d+_\w+_)\w.jpg!',$url,$matches);
if (!empty($matches[1])) $imageurl=$matches[1].'m.jpg';
}
else // This is a flickr page (html)
{
// Get the flickr html page.
list($headers, $content) = get_http_response($url, 20);
if (strpos($headers[0], '200 OK') !== false)
{
// flickr now nicely provides the URL of the thumbnail in each flickr page.
preg_match('!<link rel=\"image_src\" href=\"(.+?)\"!', $content, $matches);
if (!empty($matches[1])) $imageurl=$matches[1];
// In albums (and some other pages), the link rel="image_src" is not provided,
// but flickr provides:
// <meta property="og:image" content="http://farm4.staticflickr.com/3398/3239339068_25d13535ff_z.jpg" />
if ($imageurl=='')
{
preg_match('!<meta property=\"og:image\" content=\"(.+?)\"!', $content, $matches);
if (!empty($matches[1])) $imageurl=$matches[1];
}
}
}
if ($imageurl!='')
{ // Let's download the image.
// Image is 240x120, so 10 seconds to download should be enough.
list($headers, $content) = get_http_response($imageurl, 10);
if (strpos($headers[0], '200 OK') !== false) {
// Save image to cache.
file_put_contents($cacheDir .'/'. $thumbname, $content);
header('Content-Type: image/jpeg');
echo $content;
return;
}
}
}
elseif ($domain=='vimeo.com' )
{
// This is more complex: we have to perform a HTTP request, then parse the result.
// Maybe we should deport this to JavaScript ? Example: http://stackoverflow.com/questions/1361149/get-img-thumbnails-from-vimeo/4285098#4285098
$vid = substr(parse_url($url,PHP_URL_PATH),1);
list($headers, $content) = get_http_response('https://vimeo.com/api/v2/video/'.escape($vid).'.php', 5);
if (strpos($headers[0], '200 OK') !== false) {
$t = unserialize($content);
$imageurl = $t[0]['thumbnail_medium'];
// Then we download the image and serve it to our client.
list($headers, $content) = get_http_response($imageurl, 10);
if (strpos($headers[0], '200 OK') !== false) {
// Save image to cache.
file_put_contents($cacheDir .'/'. $thumbname, $content);
header('Content-Type: image/jpeg');
echo $content;
return;
}
}
}
elseif ($domain=='ted.com' || endsWith($domain,'.ted.com'))
{
// The thumbnail for TED talks is located in the <link rel="image_src" [...]> tag on that page
// http://www.ted.com/talks/mikko_hypponen_fighting_viruses_defending_the_net.html
// <link rel="image_src" href="http://images.ted.com/images/ted/28bced335898ba54d4441809c5b1112ffaf36781_389x292.jpg" />
list($headers, $content) = get_http_response($url, 5);
if (strpos($headers[0], '200 OK') !== false) {
// Extract the link to the thumbnail
preg_match('!link rel="image_src" href="(http://images.ted.com/images/ted/.+_\d+x\d+\.jpg)"!', $content, $matches);
if (!empty($matches[1]))
{ // Let's download the image.
$imageurl=$matches[1];
// No control on image size, so wait long enough
list($headers, $content) = get_http_response($imageurl, 20);
if (strpos($headers[0], '200 OK') !== false) {
$filepath = $cacheDir .'/'. $thumbname;
file_put_contents($filepath, $content); // Save image to cache.
if (resizeImage($filepath))
{
header('Content-Type: image/jpeg');
echo file_get_contents($filepath);
return;
}
}
}
}
}
elseif ($domain=='xkcd.com' || endsWith($domain,'.xkcd.com'))
{
// There is no thumbnail available for xkcd comics, so download the whole image and resize it.
// http://xkcd.com/327/
// <img src="http://imgs.xkcd.com/comics/exploits_of_a_mom.png" title="<BLABLA>" alt="<BLABLA>" />
list($headers, $content) = get_http_response($url, 5);
if (strpos($headers[0], '200 OK') !== false) {
// Extract the link to the thumbnail
preg_match('!<img src="(http://imgs.xkcd.com/comics/.*)" title="[^s]!', $content, $matches);
if (!empty($matches[1]))
{ // Let's download the image.
$imageurl=$matches[1];
// No control on image size, so wait long enough
list($headers, $content) = get_http_response($imageurl, 20);
if (strpos($headers[0], '200 OK') !== false) {
$filepath = $cacheDir.'/'.$thumbname;
// Save image to cache.
file_put_contents($filepath, $content);
if (resizeImage($filepath))
{
header('Content-Type: image/jpeg');
echo file_get_contents($filepath);
return;
}
}
}
}
}
else
{
// For all other domains, we try to download the image and make a thumbnail.
// We allow 30 seconds max to download (and downloads are limited to 4 Mb)
list($headers, $content) = get_http_response($url, 30);
if (strpos($headers[0], '200 OK') !== false) {
$filepath = $cacheDir .'/'.$thumbname;
// Save image to cache.
file_put_contents($filepath, $content);
if (resizeImage($filepath))
{
header('Content-Type: image/jpeg');
echo file_get_contents($filepath);
return;
}
}
}
// Otherwise, return an empty image (8x8 transparent gif)
$blankgif = base64_decode('R0lGODlhCAAIAIAAAP///////yH5BAEKAAEALAAAAAAIAAgAAAIHjI+py+1dAAA7');
// Also put something in cache so that this URL is not requested twice.
file_put_contents($cacheDir .'/'. $blankname, $blankgif);
header('Content-Type: image/gif');
echo $blankgif;
}
// Make a thumbnail of the image (to width: 120 pixels)
// Returns true if success, false otherwise.
function resizeImage($filepath)
{
if (!function_exists('imagecreatefromjpeg')) return false; // GD not present: no thumbnail possible.
// Trick: some stupid people rename GIF as JPEG... or else.
// So we really try to open each image type whatever the extension is.
$header=file_get_contents($filepath,false,NULL,0,256); // Read first 256 bytes and try to sniff file type.
$im=false;
$i=strpos($header,'GIF8'); if (($i!==false) && ($i==0)) $im = imagecreatefromgif($filepath); // Well this is crude, but it should be enough.
$i=strpos($header,'PNG'); if (($i!==false) && ($i==1)) $im = imagecreatefrompng($filepath);
$i=strpos($header,'JFIF'); if ($i!==false) $im = imagecreatefromjpeg($filepath);
if (!$im) return false; // Unable to open image (corrupted or not an image)
$w = imagesx($im);
$h = imagesy($im);
$ystart = 0; $yheight=$h;
if ($h>$w) { $ystart= ($h/2)-($w/2); $yheight=$w/2; }
$nw = 120; // Desired width
$nh = min(floor(($h*$nw)/$w),120); // Compute new width/height, but maximum 120 pixels height.
// Resize image:
$im2 = imagecreatetruecolor($nw,$nh);
imagecopyresampled($im2, $im, 0, 0, 0, $ystart, $nw, $nh, $w, $yheight);
imageinterlace($im2,true); // For progressive JPEG.
$tempname=$filepath.'_TEMP.jpg';
imagejpeg($im2, $tempname, 90);
imagedestroy($im);
imagedestroy($im2);
unlink($filepath);
rename($tempname,$filepath); // Overwrite original picture with thumbnail.
return true;
}
if (isset($_SERVER['QUERY_STRING']) && startsWith($_SERVER['QUERY_STRING'], 'do=genthumbnail')) { genThumbnail($conf); exit; } // Thumbnail generation/cache does not need the link database.
if (isset($_SERVER['QUERY_STRING']) && startsWith($_SERVER['QUERY_STRING'], 'do=dailyrss')) { showDailyRSS($conf); exit; }
if (!isset($_SESSION['LINKS_PER_PAGE'])) {
$_SESSION['LINKS_PER_PAGE'] = $conf->get('general.links_per_page', 20);

51
tests/ThumbnailerTest.php Normal file
View File

@ -0,0 +1,51 @@
<?php
require_once 'application/Thumbnailer.php';
require_once 'application/config/ConfigManager.php';
/**
* Class ThumbnailerTest
*
* We only make 1 thumb test because:
*
* 1. the thumbnailer library is itself tested
* 2. we don't want to make too many external requests during the tests
*/
class ThumbnailerTest extends PHPUnit_Framework_TestCase
{
/**
* Test a thumbnail with a custom size.
*/
public function testThumbnailValid()
{
$conf = new ConfigManager('tests/utils/config/configJson');
$width = 200;
$height = 200;
$conf->set('thumbnails.width', $width);
$conf->set('thumbnails.height', $height);
$thumbnailer = new Thumbnailer($conf);
$thumb = $thumbnailer->get('https://github.com/shaarli/Shaarli/');
$this->assertNotFalse($thumb);
$image = imagecreatefromstring(file_get_contents($thumb));
$this->assertEquals($width, imagesx($image));
$this->assertEquals($height, imagesy($image));
}
/**
* Test a thumbnail that can't be retrieved.
*
* @expectedException WebThumbnailer\Exception\ThumbnailNotFoundException
*/
public function testThumbnailNotValid()
{
$oldlog = ini_get('error_log');
ini_set('error_log', '/dev/null');
$thumbnailer = new Thumbnailer(new ConfigManager());
$thumb = $thumbnailer->get('nope');
$this->assertFalse($thumb);
ini_set('error_log', $oldlog);
}
}

3
tests/utils/config/configJson.json.php
View File

@ -29,6 +29,9 @@
},
"plugins": {
"WALLABAG_VERSION": 1
},
"dev": {
"debug": true
}
}
*/ ?>

12
tpl/vintage/configure.html
View File

@ -128,6 +128,18 @@
<input type="text" name="apiSecret" id="apiSecret" size="50" value="{$api_secret}" />
</td>
</tr>
<tr>
<td valign="top"><b>Enable thumbnails</b></td>
<td>
<input type="checkbox" name="enableThumbnails" id="enableThumbnails"
{if="$thumbnails_enabled"}checked{/if}/>
<label for="enableThumbnails">
&nbsp;<strong>Warning:</strong>
If you have a large database, the first retrieval may take a few minutes.
It's recommended to visit the picture wall after enabling this feature
</label>
</td>
</tr>
<tr>
<td></td>

11
tpl/vintage/linklist.html
View File

@ -80,7 +80,16 @@
{loop="$links"}
<li{if="$value.class"} class="{$value.class}"{/if}>
<a id="{$value.shorturl}"></a>
<div class="thumbnail">{$value.url|thumbnail}</div>
{if="$thumbnails_enabled && !empty($value.thumbnail)"}
<div class="thumbnail">
<a href="{$value.real_url}">
{ignore}RainTPL hack: put the 2 src on two different line to avoid path replace bug{/ignore}
<img data-src="{$value.thumbnail}#" class="b-lazy"
src="#"
alt="thumbnail" width="{$thumbnails_width}" height="{$thumbnails_height}" />
</a>
</div>
{/if}
<div class="linkcontainer">
{if="$is_logged_in"}
<div class="linkeditbuttons">

6
tpl/vintage/picwall.html
View File

@ -15,7 +15,11 @@
<div id="picwall_container">
{loop="$linksToDisplay"}
<div class="picwall_pictureframe">
{$value.thumbnail}<a href="{$value.real_url}"><span class="info">{$value.title}</span></a>
{ignore}RainTPL hack: put the 2 src on two different line to avoid path replace bug{/ignore}
<img data-src="{$value.thumbnail}#" class="b-lazy"
src="#"
alt="thumbnail" width="{$thumbnails_width}" height="{$thumbnails_height}" />
<a href="{$value.real_url}"><span class="info">{$value.title}</span></a>
{loop="$value.picwall_plugin"}
{$value}
{/loop}