src/Module/Photo.php

   1 <?php
   2 /**
   3  * @file src/Module/Photo.php
   4  */
   5
   6 namespace Friendica\Module;
   7
   8 use Friendica\BaseModule;
   9 use Friendica\Core\Logger;
  10 use Friendica\Model\Photo as MPhoto;
  11 use Friendica\Object\Image;
  12 use Friendica\Util\Security;
  13 use Friendica\Network\HTTPException\NotFoundException;
  14 use Friendica\Network\HTTPException\BadRequestException;
  15 use Friendica\Network\HTTPException\InternalServerErrorException;
  16
  17 /**
  18  * @brief Photo Module
  19  */
  20 class Photo extends BaseModule
  21 {
  22
  23         /**
  24          * @brief Module initializer
  25          *
  26          * Fetch a photo or an avatar, in optional size, check for permissions and
  27          * return the image
  28          */
  29         public static function init()
  30         {
  31                 $a = self::getApp();
  32                 if ($a->argc <= 1 || $a->argc > 4) {
  33                         throw new BadRequestException();
  34                         killme();
  35                 }
  36
  37                 if (isset($_SERVER['HTTP_IF_MODIFIED_SINCE'])) {
  38                         header('HTTP/1.1 304 Not Modified');
  39                         header("Last-Modified: " . gmdate("D, d M Y H:i:s", time()) . " GMT");
  40                         if (!empty($_SERVER['HTTP_IF_NONE_MATCH'])) {
  41                                 header('Etag: ' . $_SERVER['HTTP_IF_NONE_MATCH']);
  42                         }
  43                         header("Expires: " . gmdate("D, d M Y H:i:s", time() + (31536000)) . " GMT");
  44                         header("Cache-Control: max-age=31536000");
  45                         if (function_exists('header_remove')) {
  46                                 header_remove('Last-Modified');
  47                                 header_remove('Expires');
  48                                 header_remove('Cache-Control');
  49                         }
  50                         exit;
  51                 }
  52
  53                 $customsize = 0;
  54                 switch($a->argc) {
  55                 case 4:
  56                         $customsize = intval($a->argv[2]);
  57                         $uid = self::stripExtension($a->argv[3]);
  58                         $photo = self::getAvatar($uid, $a->argv[1]);
  59                         break;
  60                 case 3:
  61                         $uid = self::stripExtension($a->argv[2]);
  62                         $photo = self::getAvatar($uid, $a->argv[1]);
  63                         break;
  64                 case 2:
  65                         $photoid = self::stripExtension($a->argv[1]);
  66                         $scale = 0;
  67                         if (substr($photoid, -2, 1) == '-') {
  68                                 $scale = intval(substr($photoid, -1, 1));
  69                                 $photoid = substr($photoid, 0, -2);
  70                         }
  71                         $photo = MPhoto::getPhoto($photoid, $scale);
  72                         break;
  73                 }
  74
  75                 if ($photo===false) {
  76                         header($_SERVER["SERVER_PROTOCOL"] . " 404 Not Found" , true, 404);
  77                         killme();
  78                 }
  79
  80                 $cacheable = ($photo["allow_cid"].$photo["allow_gid"].$photo["deny_cid"].$photo["deny_gid"] === "") && (isset($photo["cacheable"])?$photo["cacheable"]:true);
  81
  82                 $img = MPhoto::getImageForPhoto($photo);
  83
  84                 if (is_null($img) || !$img->isValid()) {
  85                         Logger::log("Invalid photo with id {$photo['id']}.");
  86                         throw new InternalServerErrorException();
  87                 }
  88
  89
  90                 // if customsize is set and image is not a gif, resize it
  91                 if ($img->getType() !== "image/gif" && $customsize > 0 && $customsize < 501) {
  92                         $img->scaleToSquare($customsize);
  93                 }
  94
  95
  96                 if (function_exists('header_remove')) {
  97                         header_remove('Pragma');
  98                         header_remove('pragma');
  99                 }
 100
 101                 header("Content-type: " . $img->getType());
 102
 103                 if (!$cacheable) {
 104                         // it is a private photo that they have no permission to view.
 105                         // tell the browser not to cache it, in case they authenticate
 106                         // and subsequently have permission to see it
 107                         header("Cache-Control: no-store, no-cache, must-revalidate");
 108                 } else {
 109                         header("Last-Modified: " . gmdate("D, d M Y H:i:s", time()) . " GMT");
 110                         header('Etag: "' . md5($img->asString()) . '"');
 111                         header("Expires: " . gmdate("D, d M Y H:i:s", time() + (31536000)) . " GMT");
 112                         header("Cache-Control: max-age=31536000");
 113                 }
 114
 115
 116
 117                 echo $img->asString();
 118
 119
 120                 killme();
 121         }
 122
 123         private static function stripExtension($name)
 124         {
 125                 $name = str_replace([".jpg", ".png", ".gif"], ["", "", ""], $name);
 126                 foreach (Image::supportedTypes() AS $m => $e) {
 127                         $name = str_replace('.' . $e, '', $name);
 128                 }
 129                 return $name;
 130         }
 131
 132         private static function getAvatar($uid, $type="avatar")
 133         {
 134
 135                 switch($type) {
 136                 case "profile":
 137                 case "custom":
 138                         $scale = 4;
 139                         $default = "images/person-300.jpg";
 140                         break;
 141                 case "micro":
 142                         $scale = 6;
 143                         $default = "images/person-48.jpg";
 144                         break;
 145                 case "avatar":
 146                 default:
 147                         $scale = 5;
 148                         $default = "images/person-80.jpg";
 149                 }
 150
 151                 $photo = MPhoto::selectFirst([], ["scale" => $scale, "uid" => $uid, "profile" => 1]);
 152                 if ($photo===false) {
 153                         // todo default image info
 154                 }
 155                 return $photo;
 156         }
 157
 158 }