<?php
-// Shaarli 0.0.21 beta - Shaare your links...
+// Shaarli 0.0.22 beta - Shaare your links...
// The personal, minimalist, super-fast, no-database delicious clone. By sebsauvage.net
// http://sebsauvage.net/wiki/doku.php?id=php:shaarli
// Licence: http://www.opensource.org/licenses/zlib-license.php
define('OPEN_SHAARLI',false); // If true, anyone can add/edit/delete links without having to login
define('HIDE_TIMESTAMPS',false); // If true, the moment when links were saved are not shown to users that are not logged in.
define('ENABLE_THUMBNAILS',true); // Enable thumbnails in links.
-
+define('CACHEDIR','cache'); // Cache directory for thumbnails for SLOW services (like flickr)
+
// -----------------------------------------------------------------------------------------------
// Program config (touch at your own risks !)
define('UPDATECHECK_FILENAME',DATADIR.'/lastupdatecheck.txt'); // For updates check of Shaarli.
header("Cache-Control: no-store, no-cache, must-revalidate");
header("Cache-Control: post-check=0, pre-check=0", false);
header("Pragma: no-cache");
-define('shaarli_version','0.0.21 beta');
+define('shaarli_version','0.0.22 beta');
if (!is_dir(DATADIR)) { mkdir(DATADIR,0705); chmod(DATADIR,0705); }
+if (!is_dir(CACHEDIR)) { mkdir(CACHEDIR,0705); chmod(CACHEDIR,0705); }
if (!is_file(DATADIR.'/.htaccess')) { file_put_contents(DATADIR.'/.htaccess',"Allow from none\nDeny from all\n"); } // Protect data files.
+if (!is_file(CACHEDIR.'/.htaccess')) { file_put_contents(CACHEDIR.'/.htaccess',"Allow from none\nDeny from all\n"); } // Protect data files.
if (!is_file(CONFIG_FILE)) install();
require CONFIG_FILE; // Read login/password hash into $GLOBALS.
// Small protection against dodgy config files:
logout();
return false;
}
- $_SESSION['expires_on']=time()+INACTIVITY_TIMEOUT; // User accessed a page : Update his/her session expiration date.
+ if (!empty($_SESSION['longlastingsession'])) $_SESSION['expires_on']=time()+$_SESSION['longlastingsession']; // In case of "Stay signed in" checked.
+ else $_SESSION['expires_on']=time()+INACTIVITY_TIMEOUT; // Standard session expiration date.
+
return true;
}
if (!ban_canLogin()) die('I said: NO. You are banned for the moment. Go away.');
if (isset($_POST['password']) && tokenOk($_POST['token']) && (check_auth($_POST['login'], $_POST['password'])))
{ // Login/password is ok.
- ban_loginOk();
+ ban_loginOk();
+ // If user wants to keep the session cookie even after the browser closes:
+ if (!empty($_POST['longlastingsession']))
+ {
+ $_SESSION['longlastingsession']=31536000; // (31536000 seconds = 1 year)
+ $_SESSION['expires_on']=time()+$_SESSION['longlastingsession']; // Set session expiration on server-side.
+ session_set_cookie_params($_SESSION['longlastingsession']); // Set session cookie expiration on client side
+ session_regenerate_id(true); // Send cookie with new expiration date to browser.
+ }
+ else // Standard session expiration (=when browser closes)
+ {
+ session_set_cookie_params(0); // 0 means "When browser closes"
+ session_regenerate_id(true);
+ }
// Optional redirect after login:
- if (isset($_GET['post'])) { header('Location: ?post='.urlencode($_GET['post']).(!empty($_GET['source'])?'&source='.urlencode($_GET['source']):'')); exit; }
+ if (isset($_GET['post'])) { header('Location: ?post='.urlencode($_GET['post']).(!empty($_GET['title'])?'&title='.urlencode($_GET['title']):'').(!empty($_GET['source'])?'&source='.urlencode($_GET['source']):'')); exit; }
if (isset($_POST['returnurl']))
{
if (endsWith($_POST['returnurl'],'?do=login')) { header('Location: ?'); exit; } // Prevent loops over login screen.
exit;
}
$returnurl_html = (isset($_SERVER['HTTP_REFERER']) ? '<input type="hidden" name="returnurl" value="'.htmlspecialchars($_SERVER['HTTP_REFERER']).'">' : '');
- $loginform='<div id="headerform"><form method="post" name="loginform">Login: <input type="text" name="login"> Password : <input type="password" name="password"> <input type="submit" value="Login" class="bigbutton"><input type="hidden" name="token" value="'.getToken().'">'.$returnurl_html.'</form></div>';
+ $loginform='<div id="headerform"><form method="post" name="loginform">Login: <input type="text" name="login"> Password : <input type="password" name="password"> <input type="submit" value="Login" class="bigbutton"><br>';
+ $loginform.='<input style="margin:10 0 0 40;" type="checkbox" name="longlastingsession"> Stay signed in (Do not check on public computers)<input type="hidden" name="token" value="'.getToken().'">'.$returnurl_html.'</form></div>';
$onload = 'onload="document.loginform.login.focus();"';
$data = array('pageheader'=>$loginform,'body'=>'','onload'=>$onload);
templatePage($data);
exit;
}
-
// -------- User wants to logout.
if (startswith($_SERVER["QUERY_STRING"],'do=logout'))
{
// Show login screen, then redirect to ?post=...
if (isset($_GET['post']))
{
- header('Location: ?do=login&post='.urlencode($_GET['post']).(isset($_GET['source'])?'&source='.urlencode($_GET['source']):'')); // Redirect to login page, then back to post link.
+ header('Location: ?do=login&post='.urlencode($_GET['post']).(isset($_GET['title'])?'&title='.urlencode($_GET['title']):'').(isset($_GET['source'])?'&source='.urlencode($_GET['source']):'')); // Redirect to login page, then back to post link.
exit;
}
function thumbnail($url)
{
if (!ENABLE_THUMBNAILS) return '';
+
+ // For most hosts, the URL of the thumbnail can be easily deduced from the URL of the link.
+ // (eg. http://www.youtube.com/watch?v=spVypYk4kto ---> http://img.youtube.com/vi/spVypYk4kto/2.jpg )
+ // ^^^^^^^^^^^ ^^^^^^^^^^^
$domain = parse_url($url,PHP_URL_HOST);
if ($domain=='youtube.com' || $domain=='www.youtube.com')
{
return '<div class="thumbnail"><a href="'.htmlspecialchars($url).'"><img src="'.htmlspecialchars($thumburl).'" width="120" style="height:auto;"></a></div>';
}
}
- if ($domain=='vimeo.com')
+
+ // 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 ($domain=='flickr.com' || endsWith($domain,'.flickr.com') || $domain=='vimeo.com')
{
- // This is more complex: we have to perform a HTTP request, then parse the result.
- // This slows down page generation :-(
- // 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);
- // We allow 2 seconds for Vimeo servers to respond.
- list($httpstatus,$headers,$data) = getHTTP('http://vimeo.com/api/v2/video/'.htmlspecialchars($vid).'.php',2);
- if (strpos($httpstatus,'200 OK'))
- {
- $t = unserialize($data);
- if (!empty($t[0]['thumbnail_medium'])) return '<div class="thumbnail"><a href="'.htmlspecialchars($url).'"><img src="'.htmlspecialchars($t[0]['thumbnail_medium']).'" width="120" style="height:auto;"></a></div>';
- }
+ $sign = hash_hmac('sha256', $url, $GLOBALS['salt']); // We use the salt to sign data (it's random, secret, and specific to each installation)
+ return '<div class="thumbnail"><a href="'.htmlspecialchars($url).'"><img src="?do=genthumbnail&hmac='.htmlspecialchars($sign).'&url='.urlencode($url).'" width="120" style="height:auto;"></a></div>';
}
+
return ''; // No thumbnail.
}
}
}
+/* 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 (eg. 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 (eg. 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.
+*/
+function genThumbnail()
+{
+ // Make sure the parameters in the URL were generated by us.
+ $sign = hash_hmac('sha256', $_GET['url'], $GLOBALS['salt']);
+ if ($sign!=$_GET['hmac']) die('Naughty boy !');
+
+ // 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'))
+ {
+ // WTF ? I need a flickr API key to get a fucking thumbnail ? No way.
+ // I'll extract the thumbnail URL myself. First, we have to get the flickr HTML page.
+ // All images in Flickr are in the form:
+ // http://farm[farm].static.flickr.com/[server]/[id]_[secret]_[size].jpg
+ // Example: http://farm7.static.flickr.com/6205/6088513739_fc158467fe_z.jpg
+ // We want the 240x120 format, which is _m.jpg.
+ // We search for the first image in the page which does not have the _s size,
+ // when use the _m to get the thumbnail.
+
+ // Is this a link to an image, or to a flickr page ?
+ $imageurl='';
+ logm('url: '.$url);
+ if (endswith(parse_url($url,PHP_URL_PATH),'.jpg'))
+ { // This is a direct link to an image. eg. http://farm1.static.flickr.com/5/5921913_ac83ed27bd_o.jpg
+ preg_match('!(http://farm\d+.static.flickr.com/\d+/\d+_\w+_)\w.jpg!',$url,$matches);
+ if (!empty($matches[1])) $imageurl=$matches[1].'m.jpg';
+ }
+ else // this is a flickr page (html)
+ {
+ list($httpstatus,$headers,$data) = getHTTP($url,20); // Get the flickr html page.
+ if (strpos($httpstatus,'200 OK'))
+ {
+ preg_match('!(http://farm\d+.static.flickr.com/\d+/\d+_\w+_)[^s].jpg!',$data,$matches);
+ if (!empty($matches[1])) $imageurl=$matches[1].'m.jpg';
+ }
+ }
+ if ($imageurl!='')
+ { // Let's download the image.
+ list($httpstatus,$headers,$data) = getHTTP($imageurl,10); // Image is 240x120, so 10 seconds to download should be enough.
+ if (strpos($httpstatus,'200 OK'))
+ {
+ file_put_contents(CACHEDIR.'/'.$thumbname,$data); // Save image to cache.
+ header('Content-Type: image/jpeg');
+ echo $data;
+ return;
+ }
+ }
+ else logm('unkown flickr url: '.$url);
+ }
+
+ if ($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($httpstatus,$headers,$data) = getHTTP('http://vimeo.com/api/v2/video/'.htmlspecialchars($vid).'.php',5);
+ if (strpos($httpstatus,'200 OK'))
+ {
+ $t = unserialize($data);
+ $imageurl = $t[0]['thumbnail_medium'];
+ // Then we download the image and serve it to our client.
+ list($httpstatus,$headers,$data) = getHTTP($imageurl,10);
+ if (strpos($httpstatus,'200 OK'))
+ {
+ file_put_contents(CACHEDIR.'/'.$thumbname,$data); // Save image to cache.
+ header('Content-Type: image/jpeg');
+ echo $data;
+ return;
+ }
+ }
+ }
+
+ // Otherwise, return an empty image (8x8 transparent gif)
+ $blankgif = base64_decode('R0lGODlhCAAIAIAAAP///////yH5BAEKAAEALAAAAAAIAAgAAAIHjI+py+1dAAA7');
+ file_put_contents(CACHEDIR.'/'.$blankname,$blankgif); // Also put something in cache so that this URL is not requested twice.
+ header('Content-Type: image/gif');
+ echo $blankgif;
+}
+
// Invalidate caches when the database is changed or the user logs out.
// (eg. tags cache).
function invalidateCaches()
unset($_SESSION['tags']);
}
+if (startswith($_SERVER["QUERY_STRING"],'do=genthumbnail')) { genThumbnail(); exit; } // Thumbnail generation/cache does not need the link database.
$LINKSDB=new linkdb(isLoggedIn() || OPEN_SHAARLI); // Read links from database (and filter private links if used it not logged in).
if (startswith($_SERVER["QUERY_STRING"],'ws=')) { processWS(); exit; } // Webservices (for jQuery/jQueryUI)
if (!isset($_SESSION['LINKS_PER_PAGE'])) $_SESSION['LINKS_PER_PAGE']=LINKS_PER_PAGE;
projects / github / shaarli / Shaarli.git / commitdiff
