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 use Friendica\Util\Security;
  14 use Friendica\Network\HTTPException\NotFoundException;
  15 use Friendica\Network\HTTPException\BadRequestException;
  16 use Friendica\Network\HTTPException\InternalServerErrorException;
  17
  18 /**
  19  * @brief Photo Module
  20  */
  21 class Photo extends BaseModule
  22 {
  23
  24         /**
  25          * @brief Module initializer
  26          *
  27          * Fetch a photo or an avatar, in optional size, check for permissions and
  28          * return the image
  29          */
  30         public static function init()
  31         {
  32                 $a = self::getApp();
  33                 if ($a->argc <= 1 || $a->argc > 4) {
  34                         System::httpExit(400, "Bad Request");
  35                 }
  36
  37                 if (isset($_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                         // not using System::httpExit() because we don't want html here.
  77                         header($_SERVER["SERVER_PROTOCOL"] . " 404 Not Found" , true, 404);
  78                         killme();
  79                 }
  80
  81                 $cacheable = ($photo["allow_cid"] . $photo["allow_gid"] . $photo["deny_cid"] . $photo["deny_gid"] === "") && (isset($photo["cacheable"]) ? $photo["cacheable"] : true);
  82
  83                 $img = MPhoto::getImageForPhoto($photo);
  84
  85                 if (is_null($img) || !$img->isValid()) {
  86                         Logger::log("Invalid photo with id {$photo["id"]}.");
  87                         System::httpExit(500, "Internal Server Error");
  88                 }
  89
  90
  91                 // if customsize is set and image is not a gif, resize it
  92                 if ($img->getType() !== "image/gif" && $customsize > 0 && $customsize < 501) {
  93                         $img->scaleToSquare($customsize);
  94                 }
  95
  96
  97                 if (function_exists("header_remove")) {
  98                         header_remove("Pragma");
  99                         header_remove("pragma");
 100                 }
 101
 102                 header("Content-type: " . $img->getType());
 103
 104                 if (!$cacheable) {
 105                         // it is a private photo that they have no permission to view.
 106                         // tell the browser not to cache it, in case they authenticate
 107                         // and subsequently have permission to see it
 108                         header("Cache-Control: no-store, no-cache, must-revalidate");
 109                 } else {
 110                         $md5 = md5($img->asString());
 111                         header("Last-Modified: " . gmdate("D, d M Y H:i:s", time()) . " GMT");
 112                         header("Etag: \"{$md5}\"");
 113                         header("Expires: " . gmdate("D, d M Y H:i:s", time() + (31536000)) . " GMT");
 114                         header("Cache-Control: max-age=31536000");
 115                 }
 116
 117
 118                 echo $img->asString();
 119
 120
 121                 killme();
 122         }
 123
 124         private static function stripExtension($name)
 125         {
 126                 $name = str_replace([".jpg", ".png", ".gif"], ["", "", ""], $name);
 127                 foreach (Image::supportedTypes() as $m => $e) {
 128                         $name = str_replace("." . $e, "", $name);
 129                 }
 130                 return $name;
 131         }
 132
 133         private static function getAvatar($uid, $type="avatar")
 134         {
 135
 136                 switch($type) {
 137                 case "profile":
 138                 case "custom":
 139                         $scale = 4;
 140                         $default = "images/person-300.jpg";
 141                         break;
 142                 case "micro":
 143                         $scale = 6;
 144                         $default = "images/person-48.jpg";
 145                         break;
 146                 case "avatar":
 147                 default:
 148                         $scale = 5;
 149                         $default = "images/person-80.jpg";
 150                 }
 151
 152                 $photo = MPhoto::selectFirst([], ["scale" => $scale, "uid" => $uid, "profile" => 1]);
 153                 if ($photo===false) {
 154                         $photo = MPhoto::createPhotoForSystemResource($default);
 155                 }
 156                 return $photo;
 157         }
 158
 159 }