friendica/mod/photo.php

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<?php
/**
* @file mod/photo.php
*/
use Friendica\App;
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use Friendica\Database\DBM;
use Friendica\Object\Image;
require_once 'include/security.php';
function photo_init(App $a)
{
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global $_SERVER;
$prvcachecontrol = false;
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$file = "";
switch ($a->argc) {
case 4:
$person = $a->argv[3];
$customres = intval($a->argv[2]);
$type = $a->argv[1];
break;
case 3:
$person = $a->argv[2];
$type = $a->argv[1];
break;
case 2:
$photo = $a->argv[1];
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$file = $photo;
break;
case 1:
default:
killme();
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// NOTREACHED
}
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if (isset($_SERVER['HTTP_IF_MODIFIED_SINCE'])) {
header('HTTP/1.1 304 Not Modified');
header("Last-Modified: " . gmdate("D, d M Y H:i:s", time()) . " GMT");
header('Etag: ' . $_SERVER['HTTP_IF_NONE_MATCH']);
header("Expires: " . gmdate("D, d M Y H:i:s", time() + (31536000)) . " GMT");
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header("Cache-Control: max-age=31536000");
if (function_exists('header_remove')) {
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header_remove('Last-Modified');
header_remove('Expires');
header_remove('Cache-Control');
}
exit;
}
$default = 'images/person-175.jpg';
$public = true;
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if (isset($type)) {
// Profile photos
switch ($type) {
case 'profile':
case 'custom':
$resolution = 4;
break;
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case 'micro':
$resolution = 6;
$default = 'images/person-48.jpg';
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break;
case 'avatar':
default:
$resolution = 5;
$default = 'images/person-80.jpg';
break;
}
$uid = str_replace(['.jpg', '.png', '.gif'], ['', '', ''], $person);
foreach (Image::supportedTypes() AS $m => $e) {
$uid = str_replace('.' . $e, '', $uid);
}
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$r = q("SELECT * FROM `photo` WHERE `scale` = %d AND `uid` = %d AND `profile` = 1 LIMIT 1",
intval($resolution),
intval($uid)
);
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if (DBM::is_result($r)) {
$data = $r[0]['data'];
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$mimetype = $r[0]['type'];
}
if (empty($data)) {
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$data = file_get_contents($default);
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$mimetype = 'image/jpeg';
}
} else {
// Other photos
$resolution = 0;
$photo = str_replace(['.jpg', '.png', '.gif'], ['', '', ''], $photo);
foreach (Image::supportedTypes() AS $m => $e) {
$photo = str_replace('.' . $e, '', $photo);
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}
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if (substr($photo, -2, 1) == '-') {
$resolution = intval(substr($photo, -1, 1));
$photo = substr($photo, 0, -2);
}
// check if the photo exists and get the owner of the photo
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$r = q("SELECT `uid` FROM `photo` WHERE `resource-id` = '%s' LIMIT 1",
dbesc($photo),
intval($resolution)
);
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if (DBM::is_result($r)) {
$sql_extra = permissions_sql($r[0]['uid']);
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// Now we'll see if we can access the photo
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$r = q("SELECT * FROM `photo` WHERE `resource-id` = '%s' AND `scale` <= %d $sql_extra ORDER BY scale DESC LIMIT 1",
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dbesc($photo),
intval($resolution)
);
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if (DBM::is_result($r)) {
$resolution = $r[0]['scale'];
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$data = $r[0]['data'];
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$mimetype = $r[0]['type'];
$public = $r[0]['allow_cid'] == '' && $r[0]['allow_gid'] == '' && $r[0]['deny_cid'] == '' && $r[0]['deny_gid'] == '';
} else {
// The picure exists. We already checked with the first query.
// obviously, this is not an authorized viev!
$data = file_get_contents('images/nosign.jpg');
$mimetype = 'image/jpeg';
$prvcachecontrol = true;
$public = false;
}
}
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}
if (empty($data)) {
if (isset($resolution)) {
switch ($resolution) {
case 4:
$data = file_get_contents('images/person-175.jpg');
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$mimetype = 'image/jpeg';
break;
case 5:
$data = file_get_contents('images/person-80.jpg');
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$mimetype = 'image/jpeg';
break;
case 6:
$data = file_get_contents('images/person-48.jpg');
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$mimetype = 'image/jpeg';
break;
default:
killme();
// NOTREACHED
break;
}
}
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}
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// Resize only if its not a GIF and it is supported by the library
if ($mimetype != "image/gif" && in_array($mimetype, Image::supportedTypes())) {
$Image = new Image($data, $mimetype);
if ($Image->isValid()) {
if (isset($customres) && $customres > 0 && $customres < 500) {
$Image->scaleToSquare($customres);
}
$data = $Image->asString();
$mimetype = $Image->getType();
}
}
if (function_exists('header_remove')) {
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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 {
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header("Last-Modified: " . gmdate("D, d M Y H:i:s", time()) . " GMT");
header('Etag: "' . md5($data) . '"');
header("Expires: " . gmdate("D, d M Y H:i:s", time() + (31536000)) . " GMT");
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header("Cache-Control: max-age=31536000");
}
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echo $data;
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// If the photo is public and there is an existing photo directory store the photo there
if ($public and $file != '') {
// If the photo path isn't there, try to create it
$basepath = $a->get_basepath();
if (!is_dir($basepath . "/photo")) {
if (is_writable($basepath)) {
mkdir($basepath . "/photo");
}
}
if (is_dir($basepath . "/photo")) {
file_put_contents($basepath . "/photo/" . $file, $data);
}
}
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killme();
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// NOTREACHED
}