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Send webmention when adding link #201

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Send webmention when adding link #201

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36e53ad
Send webmention when adding link
eliemichel Aug 27, 2014
b676572
Have the regexp liberal about rel/href ordering
eliemichel Aug 27, 2014
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25 changes: 25 additions & 0 deletions index.php
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Original file line number Diff line number Diff line change
Expand Up @@ -600,6 +600,29 @@ function html_extract_title($html)
return preg_match('!<title>(.*?)</title>!is', $html, $matches) ? trim(str_replace("\n",' ', $matches[1])) : '' ;
}

// Send a [webmention](http://webmention.org/) to the giver $url referencing the $source.
function sendWebmention($url, $source)
{
list($status,$headers,$data)=getHTTP($url,4);
if (strpos($status,'200 OK')!==false)
{
$endpoint=null;
// Get webmention endpoint. Can be rel="webmention", rel="http://webmention.org/", rel="webmention http://webmention.org/", etc.
preg_match('!<link .*rel *= *\"(?:(?:webmention|http://webmention.org/?) *)+\" .*href *= *\"(.+?)\"!',$data,$matches);
if (!empty($matches[1])) $endpoint=$matches[1];
preg_match('!<link .*href *= *\"(.+?)\" .*rel *= *\"(?:(?:webmention|http://webmention.org/?) *)+\"!',$data,$matches); // The order between rel and href can be different
if (!empty($matches[1])) $endpoint=$matches[1];
if ($endpoint)
{
$postdata=http_build_query(array('source'=>$source,'target'=>$url));
$options=array('http'=>array('method'=>'POST','timeout'=>4,'header'=>'Content-type: application/x-www-form-urlencoded','content'=>$postdata));
$context=stream_context_create($options);
$res = file_get_contents($endpoint, false, $context); // Don't care the result
}
}
}


// ------------------------------------------------------------------------------------------
// Token management for XSRF protection
// Token should be used in any form which acts on data (create,update,delete,import...).
Expand All @@ -625,6 +648,7 @@ function tokenOk($token)
return false; // Wrong token, or already used.
}


// ------------------------------------------------------------------------------------------
/* This class is in charge of building the final page.
(This is basically a wrapper around RainTPL which pre-fills some fields.)
Expand Down Expand Up @@ -1489,6 +1513,7 @@ function renderPage()
if ($link['title']=='') $link['title']=$link['url']; // If title is empty, use the URL as title.
$LINKSDB[$linkdate] = $link;
$LINKSDB->savedb(); // save to disk
sendWebmention($url, $_SERVER['SCRIPT_URI'].'?'.smallHash($linkdate));
pubsubhub();

// If we are called from the bookmarklet, we must close the popup:
Expand Down