<?php
namespace Zotlabs\Module;
require_once('include/security.php');
require_once('include/attach.php');
require_once('include/photo/photo_driver.php');
class Photo extends \Zotlabs\Web\Controller {
function init() {
$prvcachecontrol = false;
$streaming = null;
$channel = null;
switch(argc()) {
case 4:
$person = argv(3);
$res = argv(2);
$type = argv(1);
break;
case 2:
$photo = argv(1);
break;
case 1:
default:
killme();
// NOTREACHED
}
$observer_xchan = get_observer_hash();
$default = z_root() . '/' . get_default_profile_photo();
if(isset($type)) {
/**
* Profile photos - Access controls on default profile photos are not honoured since they need to be exchanged with remote sites.
*
*/
if($type === 'profile') {
switch($res) {
case 'm':
$resolution = 5;
$default = z_root() . '/' . get_default_profile_photo(80);
break;
case 's':
$resolution = 6;
$default = z_root() . '/' . get_default_profile_photo(48);
break;
case 'l':
default:
$resolution = 4;
break;
}
}
$uid = $person;
$d = [ 'imgscale' => $resolution, 'channel_id' => $uid, 'default' => $default, 'data' => '', 'mimetype' => '' ];
call_hooks('get_profile_photo',$d);
$resolution = $d['imgscale'];
$uid = $d['channel_id'];
$default = $d['default'];
$data = $d['data'];
$mimetype = $d['mimetype'];
if(! $data) {
$r = q("SELECT * FROM photo WHERE imgscale = %d AND uid = %d AND photo_usage = %d LIMIT 1",
intval($resolution),
intval($uid),
intval(PHOTO_PROFILE)
);
if($r) {
$data = dbunescbin($r[0]['content']);
$mimetype = $r[0]['mimetype'];
}
if(intval($r[0]['os_storage']))
$data = file_get_contents($data);
}
if(! $data) {
$data = fetch_image_from_url($default,$mimetype);
}
if(! $mimetype) {
$mimetype = 'image/png';
}
}
else {
/**
* Other photos
*/
/* Check for a cookie to indicate display pixel density, in order to detect high-resolution
displays. This procedure was derived from the "Retina Images" by Jeremey Worboys,
used in accordance with the Creative Commons Attribution 3.0 Unported License.
Project link: https://github.com/Retina-Images/Retina-Images
License link: http://creativecommons.org/licenses/by/3.0/
*/
$cookie_value = false;
if (isset($_COOKIE['devicePixelRatio'])) {
$cookie_value = intval($_COOKIE['devicePixelRatio']);
}
else {
// Force revalidation of cache on next request
$cache_directive = 'no-cache';
$status = 'no cookie';
}
$resolution = 0;
if(strpos($photo,'.') !== false)
$photo = substr($photo,0,strpos($photo,'.'));
if(substr($photo,-2,1) == '-') {
$resolution = intval(substr($photo,-1,1));
$photo = substr($photo,0,-2);
// If viewing on a high-res screen, attempt to serve a higher resolution image:
if ($resolution == 2 && ($cookie_value > 1))
{
$resolution = 1;
}
}
$r = q("SELECT uid, photo_usage FROM photo WHERE resource_id = '%s' AND imgscale = %d LIMIT 1",
dbesc($photo),
intval($resolution)
);
if($r) {
$allowed = (-1);
if(intval($r[0]['photo_usage'])) {
$allowed = 1;
if(intval($r[0]['photo_usage']) === PHOTO_COVER)
if($resolution < PHOTO_RES_COVER_1200)
$allowed = (-1);
if(intval($r[0]['photo_usage']) === PHOTO_PROFILE)
if(! in_array($resolution,[4,5,6]))
$allowed = (-1);
}
if($allowed === (-1)) {
$allowed = attach_can_view($r[0]['uid'],$observer_xchan,$photo);
}
$channel = channelx_by_n($r[0]['uid']);
// Now we'll see if we can access the photo
$e = q("SELECT * FROM photo WHERE resource_id = '%s' AND imgscale = %d $sql_extra LIMIT 1",
dbesc($photo),
intval($resolution)
);
$exists = (($e) ? true : false);
if($exists && $allowed) {
$data = dbunescbin($e[0]['content']);
$mimetype = $e[0]['mimetype'];
if(intval($e[0]['os_storage'])) {
$streaming = $data;
}
}
else {
if(! $allowed) {
http_status_exit(403,'forbidden');
}
if(! $exists) {
http_status_exit(404,'not found');
}
}
}
}
if(! isset($data)) {
if(isset($resolution)) {
switch($resolution) {
case 4:
$data = fetch_image_from_url(z_root() . '/' . get_default_profile_photo(),$mimetype);
break;
case 5:
$data = fetch_image_from_url(z_root() . '/' . get_default_profile_photo(80),$mimetype);
break;
case 6:
$data = fetch_image_from_url(z_root() . '/' . get_default_profile_photo(48),$mimetype);
break;
default:
killme();
// NOTREACHED
break;
}
}
}
if(isset($res) && intval($res) && $res < 500) {
$ph = photo_factory($data, $mimetype);
if($ph->is_valid()) {
$ph->scaleImageSquare($res);
$data = $ph->imageString();
$mimetype = $ph->getType();
}
}
// Writing in cachefile
if (isset($cachefile) && $cachefile != '')
file_put_contents($cachefile, $data);
if(function_exists('header_remove')) {
header_remove('Pragma');
header_remove('pragma');
}
header("Content-type: " . $mimetype);
if($prvcachecontrol) {
// it is a private photo that they have no permission to view.
// tell the browser not to cache it, in case they authenticate
// and subsequently have permission to see it
header("Cache-Control: no-store, no-cache, must-revalidate");
}
else {
// The photo cache default is 1 day to provide a privacy trade-off,
// as somebody reducing photo permissions on a photo that is already
// "in the wild" won't be able to stop the photo from being viewed
// for this amount amount of time once it is in the browser cache.
// The privacy expectations of your site members and their perception
// of privacy where it affects the entire project may be affected.
// This has performance considerations but we highly recommend you
// leave it alone.
$cache = get_config('system','photo_cache_time');
if(! $cache)
$cache = (3600 * 24); // 1 day
header("Expires: " . gmdate("D, d M Y H:i:s", time() + $cache) . " GMT");
header("Cache-Control: max-age=" . $cache);
}
// If it's a file resource, stream it.
if($streaming && $channel) {
if(strpos($streaming,'store') !== false)
$istream = fopen($streaming,'rb');
else
$istream = fopen('store/' . $channel['channel_address'] . '/' . $streaming,'rb');
$ostream = fopen('php://output','wb');
if($istream && $ostream) {
pipe_streams($istream,$ostream);
fclose($istream);
fclose($ostream);
}
}
else {
echo $data;
}
killme();
}
}
