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318 lines
8.2 KiB
PHP
318 lines
8.2 KiB
PHP
<?php
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namespace Zotlabs\Module;
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use Zotlabs\Lib\Activity;
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use Zotlabs\Lib\ActivityStreams;
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use Zotlabs\Lib\LDSignatures;
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use Zotlabs\Web\HTTPSig;
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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_factory.php');
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require_once('include/photos.php');
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class Photo extends \Zotlabs\Web\Controller {
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function init() {
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if(ActivityStreams::is_as_request()) {
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$observer_xchan = get_observer_hash();
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$allowed = false;
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$r = q("select * from item where resource_type = 'photo' and resource_id = '%s' limit 1",
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dbesc(argv(1))
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);
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if($r) {
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$allowed = attach_can_view($r[0]['uid'],$observer_xchan,argv(1));
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}
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if(! $allowed) {
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http_status_exit(404,'Permission denied.');
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}
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$channel = channelx_by_n($r[0]['uid']);
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$obj = json_decode($r[0]['obj'],true);
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$obj['actor'] = Activity::encode_person($channel,true,((get_config('system','activitypub')) ? true : false));
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$x = array_merge(['@context' => [
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ACTIVITYSTREAMS_JSONLD_REV,
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'https://w3id.org/security/v1',
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z_root() . ZOT_APSCHEMA_REV
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]], $obj );
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$headers = [];
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$headers['Content-Type'] = 'application/ld+json; profile="https://www.w3.org/ns/activitystreams"' ;
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$x['signature'] = LDSignatures::sign($x,$channel);
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$ret = json_encode($x, JSON_UNESCAPED_SLASHES);
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$headers['Digest'] = HTTPSig::generate_digest_header($ret);
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$headers['(request-target)'] = strtolower($_SERVER['REQUEST_METHOD']) . ' ' . $_SERVER['REQUEST_URI'];
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$h = HTTPSig::create_sig($headers,$channel['channel_prvkey'],channel_url($channel));
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HTTPSig::set_headers($h);
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echo $ret;
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killme();
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}
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$prvcachecontrol = false;
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$streaming = null;
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$channel = null;
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$person = 0;
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switch(argc()) {
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case 4:
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$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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$photo = argv(1);
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break;
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case 1:
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default:
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killme();
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// NOTREACHED
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}
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$observer_xchan = get_observer_hash();
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$default = z_root() . '/' . get_default_profile_photo();
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if(isset($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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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 = z_root() . '/' . 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 = z_root() . '/' . 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 = $person;
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$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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if(! $data) {
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$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($r) {
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$data = dbunescbin($r[0]['content']);
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$mimetype = $r[0]['mimetype'];
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}
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if(intval($r[0]['os_storage']))
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$data = file_get_contents($data);
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}
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if(! $data) {
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$data = fetch_image_from_url($default,$mimetype);
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}
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if(! $mimetype) {
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$mimetype = 'image/png';
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}
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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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$cookie_value = false;
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if (isset($_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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$cache_directive = 'no-cache';
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$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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{
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$resolution = 1;
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}
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}
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$r = q("SELECT uid, photo_usage 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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if(intval($r[0]['photo_usage'])) {
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$allowed = 1;
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if(intval($r[0]['photo_usage']) === PHOTO_COVER)
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if($resolution < PHOTO_RES_COVER_1200)
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$allowed = (-1);
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if(intval($r[0]['photo_usage']) === PHOTO_PROFILE)
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if(! in_array($resolution,[4,5,6]))
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$allowed = (-1);
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}
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if($allowed === (-1)) {
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$allowed = attach_can_view($r[0]['uid'],$observer_xchan,$photo);
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}
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$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 && $allowed) {
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$data = dbunescbin($e[0]['content']);
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$mimetype = $e[0]['mimetype'];
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if(intval($e[0]['os_storage'])) {
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$streaming = $data;
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}
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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(! $exists) {
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http_status_exit(404,'not found');
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}
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}
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}
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}
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if(! isset($data)) {
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if(isset($resolution)) {
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switch($resolution) {
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case 4:
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$data = fetch_image_from_url(z_root() . '/' . get_default_profile_photo(),$mimetype);
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break;
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case 5:
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$data = fetch_image_from_url(z_root() . '/' . get_default_profile_photo(80),$mimetype);
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break;
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case 6:
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$data = fetch_image_from_url(z_root() . '/' . get_default_profile_photo(48),$mimetype);
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break;
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default:
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killme();
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// NOTREACHED
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break;
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}
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}
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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 = $ph->getType();
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}
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}
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// Writing in cachefile
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if (isset($cachefile) && $cachefile != '')
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file_put_contents($cachefile, $data);
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if(function_exists('header_remove')) {
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header_remove('Pragma');
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header_remove('pragma');
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}
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header("Content-type: " . $mimetype);
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if($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: no-store, no-cache, must-revalidate");
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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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$cache = get_config('system','photo_cache_time');
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if(! $cache)
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$cache = (3600 * 24); // 1 day
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header("Expires: " . gmdate("D, d M Y H:i:s", time() + $cache) . " GMT");
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header("Cache-Control: max-age=" . $cache);
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}
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// If it's a file resource, stream it.
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if($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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