302 lines
8.3 KiB
PHP
302 lines
8.3 KiB
PHP
<?php
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namespace Zotlabs\Module;
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require_once('include/security.php');
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require_once('include/attach.php');
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require_once('include/photo/photo_driver.php');
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class Photo extends \Zotlabs\Web\Controller {
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function init() {
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$streaming = null;
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$channel = null;
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$person = 0;
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$renew = false;
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switch(argc()) {
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case 4:
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$person = argv(3);
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$res = argv(2);
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$type = argv(1);
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break;
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case 2:
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$photo = argv(1);
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break;
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case 1:
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default:
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killme();
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// NOTREACHED
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}
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$cache_mode = [ 'on' => false, 'age' => 86400, 'exp' => true, 'leak' => false ];
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call_hooks('cache_mode_hook', $cache_mode);
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$observer_xchan = get_observer_hash();
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$cachecontrol = '';
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if(isset($type)) {
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/**
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* Profile photos - Access controls on default profile photos are not honoured since they need to be exchanged with remote sites.
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*
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*/
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$default = get_default_profile_photo();
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if($type === 'profile') {
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switch($res) {
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case 'm':
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$resolution = 5;
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$default = get_default_profile_photo(80);
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break;
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case 's':
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$resolution = 6;
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$default = get_default_profile_photo(48);
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break;
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case 'l':
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default:
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$resolution = 4;
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break;
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}
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}
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$uid = $person;
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$data = '';
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$r = q("SELECT * FROM photo WHERE imgscale = %d AND uid = %d AND photo_usage = %d LIMIT 1",
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intval($resolution),
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intval($uid),
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intval(PHOTO_PROFILE)
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);
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if($r) {
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$modified = strtotime($r[0]['edited'] . "Z");
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$mimetype = $r[0]['mimetype'];
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if(intval($r[0]['os_storage']))
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$data = file_get_contents(dbunescbin($r[0]['content']));
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else
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$data = dbunescbin($r[0]['content']);
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}
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if(! $data) {
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$d = [ 'imgscale' => $resolution, 'channel_id' => $uid, 'default' => $default, 'data' => '', 'mimetype' => '' ];
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call_hooks('get_profile_photo',$d);
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$resolution = $d['imgscale'];
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$uid = $d['channel_id'];
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$default = $d['default'];
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$data = $d['data'];
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$mimetype = $d['mimetype'];
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$modified = 0;
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}
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if(! $data) {
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$x = z_fetch_url(z_root() . '/' . $default, true, 0, [ 'novalidate' => true ]);
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$data = ($x['success'] ? $x['body'] : EMPTY_STR);
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$mimetype = 'image/png';
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$modified = filemtime($default);
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}
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$cachecontrol = ', must-revalidate';
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}
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else {
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/**
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* Other photos
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*/
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/* Check for a cookie to indicate display pixel density, in order to detect high-resolution
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displays. This procedure was derived from the "Retina Images" by Jeremey Worboys,
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used in accordance with the Creative Commons Attribution 3.0 Unported License.
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Project link: https://github.com/Retina-Images/Retina-Images
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License link: http://creativecommons.org/licenses/by/3.0/
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*/
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// @FIXME It seems this part doesn't work because we are not setting such cookie
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$cookie_value = false;
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if (isset($_COOKIE['devicePixelRatio'])) {
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$cookie_value = intval($_COOKIE['devicePixelRatio']);
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}
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else {
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// Force revalidation of cache on next request
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// $prvcachecontrol = 'no-cache';
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$status = 'no cookie';
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}
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$resolution = 0;
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if(strpos($photo,'.') !== false)
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$photo = substr($photo,0,strpos($photo,'.'));
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if(substr($photo,-2,1) == '-') {
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$resolution = intval(substr($photo,-1,1));
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$photo = substr($photo,0,-2);
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// If viewing on a high-res screen, attempt to serve a higher resolution image:
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if ($resolution == 2 && ($cookie_value > 1))
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$resolution = 1;
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}
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$r = q("SELECT * FROM photo WHERE resource_id = '%s' AND imgscale = %d LIMIT 1",
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dbesc($photo),
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intval($resolution)
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);
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if($r) {
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$allowed = (-1);
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$u = intval($r[0]['photo_usage']);
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if($u) {
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$allowed = 1;
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if($u === PHOTO_COVER)
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if($resolution < PHOTO_RES_COVER_1200)
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$allowed = (-1);
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if($u === PHOTO_PROFILE)
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if(! in_array($resolution,[4,5,6]))
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$allowed = (-1);
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if($u === PHOTO_CACHE) {
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// Validate cache
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if($cache_mode['on']) {
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$cache = [ 'status' => false, 'item' => $r[0] ];
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call_hooks('cache_url_hook', $cache);
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if(! $cache['status']) {
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$url = html_entity_decode($cache['item']['display_path'], ENT_QUOTES);
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// SSLify if needed
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if(strpos(z_root(),'https:') !== false && strpos($url,'https:') === false)
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$url = z_root() . '/sslify/' . $filename . '?f=&url=' . urlencode($url);
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goaway($url);
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}
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}
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}
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}
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if($allowed === (-1))
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$allowed = attach_can_view($r[0]['uid'],$observer_xchan,$photo);
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$channel = channelx_by_n($r[0]['uid']);
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// Now we'll see if we can access the photo
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$e = q("SELECT * FROM photo WHERE resource_id = '%s' AND imgscale = %d $sql_extra LIMIT 1",
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dbesc($photo),
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intval($resolution)
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);
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$exists = (($e) ? true : false);
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if($exists && $allowed) {
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$expires = strtotime($e[0]['expires'] . 'Z');
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$data = dbunescbin($e[0]['content']);
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$filesize = $e[0]['filesize'];
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$mimetype = $e[0]['mimetype'];
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$modified = strtotime($e[0]['edited'] . 'Z');
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if(intval($e[0]['os_storage'])) {
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$streaming = $data;
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}
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if($e[0]['allow_cid'] != '' || $e[0]['allow_gid'] != '' || $e[0]['deny_gid'] != '' || $e[0]['deny_gid'] != '')
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$prvcachecontrol = 'no-store, no-cache, must-revalidate';
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}
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else {
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if(! $allowed) {
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http_status_exit(403,'forbidden');
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}
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if(! $exists) {
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http_status_exit(404,'not found');
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}
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}
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}
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else
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http_status_exit(404,'not found');
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}
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if(! $data)
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killme();
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$etag = '"' . md5($data . $modified) . '"';
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if($modified == 0)
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$modified = time();
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header_remove('Pragma');
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if((isset($_SERVER['HTTP_IF_NONE_MATCH']) && $_SERVER['HTTP_IF_NONE_MATCH'] === $etag) || (!isset($_SERVER['HTTP_IF_NONE_MATCH']) && isset($_SERVER['HTTP_IF_MODIFIED_SINCE']) && $_SERVER['HTTP_IF_MODIFIED_SINCE'] === gmdate("D, d M Y H:i:s", $modified) . " GMT")) {
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header_remove('Expires');
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header_remove('Cache-Control');
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header_remove('Set-Cookie');
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http_status_exit(304,'not modified');
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}
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if(isset($res) && intval($res) && $res < 500) {
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$ph = photo_factory($data, $mimetype);
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if($ph->is_valid()) {
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$ph->scaleImageSquare($res);
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$data = $ph->imageString();
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$mimetype = $ph->getType();
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}
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}
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if(isset($prvcachecontrol)) {
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// it is a private photo that they have no permission to view.
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// tell the browser not to cache it, in case they authenticate
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// and subsequently have permission to see it
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header("Cache-Control: " . $prvcachecontrol);
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}
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else {
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// The photo cache default is 1 day to provide a privacy trade-off,
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// as somebody reducing photo permissions on a photo that is already
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// "in the wild" won't be able to stop the photo from being viewed
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// for this amount amount of time once it is in the browser cache.
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// The privacy expectations of your site members and their perception
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// of privacy where it affects the entire project may be affected.
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// This has performance considerations but we highly recommend you
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// leave it alone.
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$maxage = $cache_mode['age'];
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if($cache_mode['exp'] || (! isset($expires)) || (isset($expires) && $expires - 60 < time()))
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$expires = time() + $maxage;
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else
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$maxage = $expires - time();
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header("Expires: " . gmdate("D, d M Y H:i:s", $expires) . " GMT");
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// set CDN/Infrastructure caching much lower than maxage
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// in the event that infrastructure caching is present.
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$smaxage = intval($maxage/12);
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header("Cache-Control: s-maxage=" . $smaxage . ", max-age=" . $maxage . $cachecontrol);
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}
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header("Content-type: " . $mimetype);
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header("Last-Modified: " . gmdate("D, d M Y H:i:s", $modified) . " GMT");
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header("ETag: " . $etag);
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header("Content-Length: " . (isset($filesize) ? $filesize : strlen($data)));
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// If it's a file resource, stream it.
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if($streaming && $channel) {
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if(strpos($streaming,'store') !== false)
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$istream = fopen($streaming,'rb');
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else
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$istream = fopen('store/' . $channel['channel_address'] . '/' . $streaming,'rb');
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$ostream = fopen('php://output','wb');
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if($istream && $ostream) {
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pipe_streams($istream,$ostream);
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fclose($istream);
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fclose($ostream);
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}
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}
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else {
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echo $data;
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}
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killme();
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}
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}
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