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\Core\System;
  11 use Friendica\Model\Photo as MPhoto;
  12 use Friendica\Object\Image;
  13
  14 /**
  15  * @brief Photo Module
  16  */
  17 class Photo extends BaseModule
  18 {
  19         /**
  20          * @brief Module initializer
  21          *
  22          * Fetch a photo or an avatar, in optional size, check for permissions and
  23          * return the image
  24          */
  25         public static function init()
  26         {
  27                 $a = self::getApp();
  28                 if ($a->argc <= 1 || $a->argc > 4) {
  29                         System::httpExit(400, "Bad Request");
  30                 }
  31
  32                 if (isset($_SERVER["HTTP_IF_MODIFIED_SINCE"])) {
  33                         header("HTTP/1.1 304 Not Modified");
  34                         header("Last-Modified: " . gmdate("D, d M Y H:i:s", time()) . " GMT");
  35                         if (!empty($_SERVER["HTTP_IF_NONE_MATCH"])) {
  36                                 header("Etag: " . $_SERVER["HTTP_IF_NONE_MATCH"]);
  37                         }
  38                         header("Expires: " . gmdate("D, d M Y H:i:s", time() + (31536000)) . " GMT");
  39                         header("Cache-Control: max-age=31536000");
  40                         if (function_exists("header_remove")) {
  41                                 header_remove("Last-Modified");
  42                                 header_remove("Expires");
  43                                 header_remove("Cache-Control");
  44                         }
  45                         exit;
  46                 }
  47
  48                 $customsize = 0;
  49                 $photo = false;
  50                 switch($a->argc) {
  51                         case 4:
  52                                 $customsize = intval($a->argv[2]);
  53                                 $uid = self::stripExtension($a->argv[3]);
  54                                 $photo = self::getAvatar($uid, $a->argv[1]);
  55                                 break;
  56                         case 3:
  57                                 $uid = self::stripExtension($a->argv[2]);
  58                                 $photo = self::getAvatar($uid, $a->argv[1]);
  59                                 break;
  60                         case 2:
  61                                 $photoid = self::stripExtension($a->argv[1]);
  62                                 $scale = 0;
  63                                 if (substr($photoid, -2, 1) == "-") {
  64                                         $scale = intval(substr($photoid, -1, 1));
  65                                         $photoid = substr($photoid, 0, -2);
  66                                 }
  67                                 $photo = MPhoto::getPhoto($photoid, $scale);
  68                                 if ($photo === false) {
  69                                         $photo = MPhoto::createPhotoForSystemResource("images/nosign.jpg");
  70                                 }
  71                                 break;
  72                 }
  73
  74                 if ($photo === false) {
  75                         // not using System::httpExit() because we don't want html here.
  76                         header($_SERVER["SERVER_PROTOCOL"] . " 404 Not Found" , true, 404);
  77                         exit();
  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 {$photo["id"]}.");
  86                         System::httpExit(500, ["description" => "Invalid photo with id {$photo["id"]}."]);
  87                 }
  88
  89                 // if customsize is set and image is not a gif, resize it
  90                 if ($img->getType() !== "image/gif" && $customsize > 0 && $customsize < 501) {
  91                         $img->scaleToSquare($customsize);
  92                 }
  93
  94                 if (function_exists("header_remove")) {
  95                         header_remove("Pragma");
  96                         header_remove("pragma");
  97                 }
  98
  99                 header("Content-type: " . $img->getType());
 100
 101                 if (!$cacheable) {
 102                         // it is a private photo that they have no permission to view.
 103                         // tell the browser not to cache it, in case they authenticate
 104                         // and subsequently have permission to see it
 105                         header("Cache-Control: no-store, no-cache, must-revalidate");
 106                 } else {
 107                         $md5 = md5($img->asString());
 108                         header("Last-Modified: " . gmdate("D, d M Y H:i:s", time()) . " GMT");
 109                         header("Etag: \"{$md5}\"");
 110                         header("Expires: " . gmdate("D, d M Y H:i:s", time() + (31536000)) . " GMT");
 111                         header("Cache-Control: max-age=31536000");
 112                 }
 113
 114                 echo $img->asString();
 115
 116                 exit();
 117         }
 118
 119         private static function stripExtension($name)
 120         {
 121                 $name = str_replace([".jpg", ".png", ".gif"], ["", "", ""], $name);
 122                 foreach (Image::supportedTypes() as $m => $e) {
 123                         $name = str_replace("." . $e, "", $name);
 124                 }
 125                 return $name;
 126         }
 127
 128         private static function getAvatar($uid, $type="avatar")
 129         {
 130
 131                 switch($type) {
 132                 case "profile":
 133                 case "custom":
 134                         $scale = 4;
 135                         $default = "images/person-300.jpg";
 136                         break;
 137                 case "micro":
 138                         $scale = 6;
 139                         $default = "images/person-48.jpg";
 140                         break;
 141                 case "avatar":
 142                 default:
 143                         $scale = 5;
 144                         $default = "images/person-80.jpg";
 145                 }
 146
 147                 $photo = MPhoto::selectFirst([], ["scale" => $scale, "uid" => $uid, "profile" => 1]);
 148                 if ($photo === false) {
 149                         $photo = MPhoto::createPhotoForSystemResource($default);
 150                 }
 151                 return $photo;
 152         }
 153
 154 }