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          * @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 || $a->argc > 4) {
  33                         System::httpExit(400, "Bad Request");
  34                 }
  35
  36                 if (isset($_SERVER["HTTP_IF_MODIFIED_SINCE"])) {
  37                         header("HTTP/1.1 304 Not Modified");
  38                         header("Last-Modified: " . gmdate("D, d M Y H:i:s", time()) . " GMT");
  39                         if (!empty($_SERVER["HTTP_IF_NONE_MATCH"])) {
  40                                 header("Etag: " . $_SERVER["HTTP_IF_NONE_MATCH"]);
  41                         }
  42                         header("Expires: " . gmdate("D, d M Y H:i:s", time() + (31536000)) . " GMT");
  43                         header("Cache-Control: max-age=31536000");
  44                         if (function_exists("header_remove")) {
  45                                 header_remove("Last-Modified");
  46                                 header_remove("Expires");
  47                                 header_remove("Cache-Control");
  48                         }
  49                         exit;
  50                 }
  51
  52                 $customsize = 0;
  53                 switch($a->argc) {
  54                 case 4:
  55                         $customsize = intval($a->argv[2]);
  56                         $uid = self::stripExtension($a->argv[3]);
  57                         $photo = self::getAvatar($uid, $a->argv[1]);
  58                         break;
  59                 case 3:
  60                         $uid = self::stripExtension($a->argv[2]);
  61                         $photo = self::getAvatar($uid, $a->argv[1]);
  62                         break;
  63                 case 2:
  64                         $photoid = self::stripExtension($a->argv[1]);
  65                         $scale = 0;
  66                         if (substr($photoid, -2, 1) == "-") {
  67                                 $scale = intval(substr($photoid, -1, 1));
  68                                 $photoid = substr($photoid, 0, -2);
  69                         }
  70                         $photo = MPhoto::getPhoto($photoid, $scale);
  71                         if ($photo === false) {
  72                                 $photo = MPhoto::createPhotoForSystemResource("images/nosign.jpg");
  73                         }
  74                         break;
  75                 }
  76
  77                 if ($photo === false) {
  78                         // not using System::httpExit() because we don't want html here.
  79                         header($_SERVER["SERVER_PROTOCOL"] . " 404 Not Found" , true, 404);
  80                         exit();
  81                 }
  82
  83                 $cacheable = ($photo["allow_cid"] . $photo["allow_gid"] . $photo["deny_cid"] . $photo["deny_gid"] === "") && (isset($photo["cacheable"]) ? $photo["cacheable"] : true);
  84
  85                 $img = MPhoto::getImageForPhoto($photo);
  86
  87                 if (is_null($img) || !$img->isValid()) {
  88                         Logger::log("Invalid photo with id {$photo["id"]}.");
  89                         System::httpExit(500, ["description" => "Invalid photo with id {$photo["id"]}."]);
  90                 }
  91
  92                 // if customsize is set and image is not a gif, resize it
  93                 if ($img->getType() !== "image/gif" && $customsize > 0 && $customsize < 501) {
  94                         $img->scaleToSquare($customsize);
  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                 echo $img->asString();
 118
 119                 exit();
 120         }
 121
 122         private static function stripExtension($name)
 123         {
 124                 $name = str_replace([".jpg", ".png", ".gif"], ["", "", ""], $name);
 125                 foreach (Image::supportedTypes() as $m => $e) {
 126                         $name = str_replace("." . $e, "", $name);
 127                 }
 128                 return $name;
 129         }
 130
 131         private static function getAvatar($uid, $type="avatar")
 132         {
 133
 134                 switch($type) {
 135                 case "profile":
 136                 case "custom":
 137                         $scale = 4;
 138                         $default = "images/person-300.jpg";
 139                         break;
 140                 case "micro":
 141                         $scale = 6;
 142                         $default = "images/person-48.jpg";
 143                         break;
 144                 case "avatar":
 145                 default:
 146                         $scale = 5;
 147                         $default = "images/person-80.jpg";
 148                 }
 149
 150                 $photo = MPhoto::selectFirst([], ["scale" => $scale, "uid" => $uid, "profile" => 1]);
 151                 if ($photo === false) {
 152                         $photo = MPhoto::createPhotoForSystemResource($default);
 153                 }
 154                 return $photo;
 155         }
 156
 157 }