mod/photo.php

   1 <?php
   2
   3 /**
   4  * @file mod/photo.php
   5  */
   6 use Friendica\App;
   7 use Friendica\Database\DBM;
   8 use Friendica\Object\Image;
   9
  10 require_once 'include/security.php';
  11
  12 function photo_init(App $a)
  13 {
  14         global $_SERVER;
  15
  16         $prvcachecontrol = false;
  17         $file = "";
  18
  19         switch ($a->argc) {
  20                 case 4:
  21                         $person = $a->argv[3];
  22                         $customres = intval($a->argv[2]);
  23                         $type = $a->argv[1];
  24                         break;
  25                 case 3:
  26                         $person = $a->argv[2];
  27                         $type = $a->argv[1];
  28                         break;
  29                 case 2:
  30                         $photo = $a->argv[1];
  31                         $file = $photo;
  32                         break;
  33                 case 1:
  34                 default:
  35                         killme();
  36                         // NOTREACHED
  37         }
  38
  39         if (isset($_SERVER['HTTP_IF_MODIFIED_SINCE'])) {
  40                 header('HTTP/1.1 304 Not Modified');
  41                 header("Last-Modified: " . gmdate("D, d M Y H:i:s", time()) . " GMT");
  42                 if (!empty($_SERVER['HTTP_IF_NONE_MATCH'])) {
  43                         header('Etag: ' . $_SERVER['HTTP_IF_NONE_MATCH']);
  44                 }
  45                 header("Expires: " . gmdate("D, d M Y H:i:s", time() + (31536000)) . " GMT");
  46                 header("Cache-Control: max-age=31536000");
  47                 if (function_exists('header_remove')) {
  48                         header_remove('Last-Modified');
  49                         header_remove('Expires');
  50                         header_remove('Cache-Control');
  51                 }
  52                 exit;
  53         }
  54
  55         $default = 'images/person-175.jpg';
  56         $public = true;
  57
  58         if (isset($type)) {
  59                 // Profile photos
  60                 switch ($type) {
  61                         case 'profile':
  62                         case 'custom':
  63                                 $resolution = 4;
  64                                 break;
  65                         case 'micro':
  66                                 $resolution = 6;
  67                                 $default = 'images/person-48.jpg';
  68                                 break;
  69                         case 'avatar':
  70                         default:
  71                                 $resolution = 5;
  72                                 $default = 'images/person-80.jpg';
  73                                 break;
  74                 }
  75
  76                 $uid = str_replace(['.jpg', '.png', '.gif'], ['', '', ''], $person);
  77
  78                 foreach (Image::supportedTypes() AS $m => $e) {
  79                         $uid = str_replace('.' . $e, '', $uid);
  80                 }
  81
  82                 $r = q("SELECT * FROM `photo` WHERE `scale` = %d AND `uid` = %d AND `profile` = 1 LIMIT 1",
  83                         intval($resolution),
  84                         intval($uid)
  85                 );
  86                 if (DBM::is_result($r)) {
  87                         $data = $r[0]['data'];
  88                         $mimetype = $r[0]['type'];
  89                 }
  90                 if (empty($data)) {
  91                         $data = file_get_contents($default);
  92                         $mimetype = 'image/jpeg';
  93                 }
  94         } else {
  95                 // Other photos
  96                 $resolution = 0;
  97                 $photo = str_replace(['.jpg', '.png', '.gif'], ['', '', ''], $photo);
  98
  99                 foreach (Image::supportedTypes() AS $m => $e) {
 100                         $photo = str_replace('.' . $e, '', $photo);
 101                 }
 102
 103                 if (substr($photo, -2, 1) == '-') {
 104                         $resolution = intval(substr($photo, -1, 1));
 105                         $photo = substr($photo, 0, -2);
 106                 }
 107
 108                 // check if the photo exists and get the owner of the photo
 109                 $r = q("SELECT `uid` FROM `photo` WHERE `resource-id` = '%s' LIMIT 1",
 110                         dbesc($photo),
 111                         intval($resolution)
 112                 );
 113                 if (DBM::is_result($r)) {
 114                         $sql_extra = permissions_sql($r[0]['uid']);
 115
 116                         // Now we'll see if we can access the photo
 117                         $r = q("SELECT * FROM `photo` WHERE `resource-id` = '%s' AND `scale` <= %d $sql_extra ORDER BY scale DESC LIMIT 1",
 118                                 dbesc($photo),
 119                                 intval($resolution)
 120                         );
 121                         if (DBM::is_result($r)) {
 122                                 $resolution = $r[0]['scale'];
 123                                 $data = $r[0]['data'];
 124                                 $mimetype = $r[0]['type'];
 125                                 $public = $r[0]['allow_cid'] == '' && $r[0]['allow_gid'] == '' && $r[0]['deny_cid'] == '' && $r[0]['deny_gid'] == '';
 126                         } else {
 127                                 // The picure exists. We already checked with the first query.
 128                                 // obviously, this is not an authorized viev!
 129                                 $data = file_get_contents('images/nosign.jpg');
 130                                 $mimetype = 'image/jpeg';
 131                                 $prvcachecontrol = true;
 132                                 $public = false;
 133                         }
 134                 }
 135         }
 136
 137         if (empty($data)) {
 138                 if (isset($resolution)) {
 139                         switch ($resolution) {
 140                                 case 4:
 141                                         $data = file_get_contents('images/person-175.jpg');
 142                                         $mimetype = 'image/jpeg';
 143                                         break;
 144                                 case 5:
 145                                         $data = file_get_contents('images/person-80.jpg');
 146                                         $mimetype = 'image/jpeg';
 147                                         break;
 148                                 case 6:
 149                                         $data = file_get_contents('images/person-48.jpg');
 150                                         $mimetype = 'image/jpeg';
 151                                         break;
 152                                 default:
 153                                         killme();
 154                                         // NOTREACHED
 155                                         break;
 156                         }
 157                 }
 158         }
 159
 160         // Resize only if its not a GIF and it is supported by the library
 161         if ($mimetype != "image/gif" && in_array($mimetype, Image::supportedTypes())) {
 162                 $Image = new Image($data, $mimetype);
 163                 if ($Image->isValid()) {
 164                         if (isset($customres) && $customres > 0 && $customres < 500) {
 165                                 $Image->scaleToSquare($customres);
 166                         }
 167                         $data = $Image->asString();
 168                         $mimetype = $Image->getType();
 169                 }
 170         }
 171
 172         if (function_exists('header_remove')) {
 173                 header_remove('Pragma');
 174                 header_remove('pragma');
 175         }
 176
 177         header("Content-type: " . $mimetype);
 178
 179         if ($prvcachecontrol) {
 180                 // it is a private photo that they have no permission to view.
 181                 // tell the browser not to cache it, in case they authenticate
 182                 // and subsequently have permission to see it
 183                 header("Cache-Control: no-store, no-cache, must-revalidate");
 184         } else {
 185                 header("Last-Modified: " . gmdate("D, d M Y H:i:s", time()) . " GMT");
 186                 header('Etag: "' . md5($data) . '"');
 187                 header("Expires: " . gmdate("D, d M Y H:i:s", time() + (31536000)) . " GMT");
 188                 header("Cache-Control: max-age=31536000");
 189         }
 190         echo $data;
 191
 192         // If the photo is public and there is an existing photo directory store the photo there
 193         if ($public and $file != '') {
 194                 // If the photo path isn't there, try to create it
 195                 $basepath = $a->get_basepath();
 196                 if (!is_dir($basepath . "/photo")) {
 197                         if (is_writable($basepath)) {
 198                                 mkdir($basepath . "/photo");
 199                         }
 200                 }
 201
 202                 if (is_dir($basepath . "/photo")) {
 203                         file_put_contents($basepath . "/photo/" . $file, $data);
 204                 }
 205         }
 206
 207         killme();
 208         // NOTREACHED
 209 }