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open graph support for shaarli

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n 2015-12-27 22:40:58 +01:00
parent 7e514943f4
commit 8879590cb5
1 changed files with 63 additions and 0 deletions
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shaarli_oleg.patch Normal file
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@ -0,0 +1,63 @@
diff --git index.php index.php
index 40a6fbe..2e1117a 100644
--- index.php
+++ index.php
@@ -2087,10 +2087,14 @@ function computeThumbnail($url,$href=false)
$path = parse_url($url,PHP_URL_PATH);
if ("/talks/" !== substr($path,0,7)) return array(); // This is not a single video URL.
}
+ }
$sign = hash_hmac('sha256', $url, $GLOBALS['salt']); // We use the salt to sign data (it's random, secret, and specific to each installation)
+ $thumbname=hash('sha1',$url).'.gif';
+ $filepath=$GLOBALS['config']['CACHEDIR'].'/'.$thumbname;
+ if (sha1_file($filepath) != '48d45d7ada69f9f858849bbd6e459f66c9694ee7')
+
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.
@@ -2400,18 +2404,30 @@ function genThumbnail()
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, $data) = get_http_url($url, 30);
- if (strpos($headers[0], '200 OK') !== false) {
- $filepath=$GLOBALS['config']['CACHEDIR'].'/'.$thumbname;
- file_put_contents($filepath,$data); // Save image to cache.
- if (resizeImage($filepath))
- {
- header('Content-Type: image/jpeg');
- echo file_get_contents($filepath);
- return;
- }
- }
+ list($httpstatus,$headers,$data) = get_http_url($url,30); // We allow 30 seconds max to download (and downloads are limited to 4 Mb)
+ // Extract the link to the thumbnail
+ $doc = new DOMDocument();
+ libxml_use_internal_errors(true);
+ $doc->loadHTML($data);
+ foreach( $doc->getElementsByTagName('meta') as $meta )
+ if ($meta->getAttribute('property') == 'og:image')
+ $imageurl=$meta->getAttribute('content');
+ if (!empty($imageurl))
+ { // Let's download the image.
+ list($httpstatus,$headers,$data) = get_http_url($imageurl,20); // No control on image size, so wait long enough.
+ if (strpos($httpstatus,'200 OK')!==false)
+ {
+ $filepath=$GLOBALS['config']['CACHEDIR'].'/'.$thumbname;
+ file_put_contents($filepath,$data); // Save image to cache.
+ if (resizeImage($filepath))
+ {
+ header('Content-Type: image/jpeg');
+ echo file_get_contents($filepath);
+ return;
+ }
+ }
+ }
+
}