mod/photo.php

   1 <?php
   2
   3 require_once('include/security.php');
   4
   5 function photo_init(&$a) {
   6
   7         // To-Do:
   8         // - checking with realpath
   9         // - checking permissions
  10         /*
  11         $cache = get_config('system','itemcache');
  12         if (($cache != '') and is_dir($cache)) {
  13                 $cachefile = $cache."/".$a->argc."-".$a->argv[1]."-".$a->argv[2]."-".$a->argv[3];
  14                 if (file_exists($cachefile)) {
  15                         $data = file_get_contents($cachefile);
  16
  17                         if(function_exists('header_remove')) {
  18                                 header_remove('Pragma');
  19                                 header_remove('pragma');
  20                         }
  21
  22                         header("Content-type: image/jpeg");
  23                         header("Expires: " . gmdate("D, d M Y H:i:s", time() + (3600*24)) . " GMT");
  24                         header("Cache-Control: max-age=" . (3600*24));
  25                         echo $data;
  26                         killme();
  27                         // NOTREACHED
  28                 }
  29         }*/
  30
  31         $prvcachecontrol = false;
  32
  33         switch($a->argc) {
  34                 case 4:
  35                         $person = $a->argv[3];
  36                         $customres = intval($a->argv[2]);
  37                         $type = $a->argv[1];
  38                         break;
  39                 case 3:
  40                         $person = $a->argv[2];
  41                         $type = $a->argv[1];
  42                         break;
  43                 case 2:
  44                         $photo = $a->argv[1];
  45                         break;
  46                 case 1:
  47                 default:
  48                         killme();
  49                         // NOTREACHED
  50         }
  51
  52         $default = 'images/person-175.jpg';
  53
  54         if(isset($type)) {
  55
  56
  57                 /**
  58                  * Profile photos
  59                  */
  60
  61                 switch($type) {
  62
  63                         case 'profile':
  64                         case 'custom':
  65                                 $resolution = 4;
  66                                 break;
  67                         case 'micro':
  68                                 $resolution = 6;
  69                                 $default = 'images/person-48.jpg';
  70                                 break;
  71                         case 'avatar':
  72                         default:
  73                                 $resolution = 5;
  74                                 $default = 'images/person-80.jpg';
  75                                 break;
  76                 }
  77
  78                 $uid = str_replace('.jpg', '', $person);
  79
  80                 $r = q("SELECT * FROM `photo` WHERE `scale` = %d AND `uid` = %d AND `profile` = 1 LIMIT 1",
  81                         intval($resolution),
  82                         intval($uid)
  83                 );
  84                 if(count($r)) {
  85                         $data = $r[0]['data'];
  86                 }
  87                 if(! isset($data)) {
  88                         $data = file_get_contents($default);
  89                 }
  90         }
  91         else {
  92
  93                 /**
  94                  * Other photos
  95                  */
  96
  97                 $resolution = 0;
  98                 $photo = str_replace('.jpg','',$photo);
  99
 100                 if(substr($photo,-2,1) == '-') {
 101                         $resolution = intval(substr($photo,-1,1));
 102                         $photo = substr($photo,0,-2);
 103                 }
 104
 105                 $r = q("SELECT `uid` FROM `photo` WHERE `resource-id` = '%s' AND `scale` = %d LIMIT 1",
 106                         dbesc($photo),
 107                         intval($resolution)
 108                 );
 109                 if(count($r)) {
 110
 111                         $sql_extra = permissions_sql($r[0]['uid']);
 112
 113                         // Now we'll see if we can access the photo
 114
 115                         $r = q("SELECT * FROM `photo` WHERE `resource-id` = '%s' AND `scale` = %d $sql_extra LIMIT 1",
 116                                 dbesc($photo),
 117                                 intval($resolution)
 118                         );
 119
 120                         if(count($r)) {
 121                                 $data = $r[0]['data'];
 122                         }
 123                         else {
 124
 125                                 // Does the picture exist? It may be a remote person with no credentials,
 126                                 // but who should otherwise be able to view it. Show a default image to let
 127                                 // them know permissions was denied. It may be possible to view the image
 128                                 // through an authenticated profile visit.
 129                                 // There won't be many completely unauthorised people seeing this because
 130                                 // they won't have the photo link, so there's a reasonable chance that the person
 131                                 // might be able to obtain permission to view it.
 132
 133                                 $r = q("SELECT * FROM `photo` WHERE `resource-id` = '%s' AND `scale` = %d LIMIT 1",
 134                                         dbesc($photo),
 135                                         intval($resolution)
 136                                 );
 137                                 if(count($r)) {
 138                                         $data = file_get_contents('images/nosign.jpg');
 139                                         $prvcachecontrol = true;
 140                                 }
 141                         }
 142                 }
 143         }
 144
 145         if(! isset($data)) {
 146                 if(isset($resolution)) {
 147                         switch($resolution) {
 148
 149                                 case 4:
 150                                         $data = file_get_contents('images/person-175.jpg');
 151                                         break;
 152                                 case 5:
 153                                         $data = file_get_contents('images/person-80.jpg');
 154                                         break;
 155                                 case 6:
 156                                         $data = file_get_contents('images/person-48.jpg');
 157                                         break;
 158                                 default:
 159                                         killme();
 160                                         // NOTREACHED
 161                                         break;
 162                         }
 163                 }
 164         }
 165
 166         if(isset($customres) && $customres > 0 && $customres < 500) {
 167                 require_once('include/Photo.php');
 168                 $ph = new Photo($data);
 169                 if($ph->is_valid()) {
 170                         $ph->scaleImageSquare($customres);
 171                         $data = $ph->imageString();
 172                 }
 173         }
 174
 175         // Writing in cachefile
 176         if (isset($cachefile) && $cachefile != '')
 177                 file_put_contents($cachefile, $data);
 178
 179         if(function_exists('header_remove')) {
 180                 header_remove('Pragma');
 181                 header_remove('pragma');
 182         }
 183
 184         header("Content-type: image/jpeg");
 185
 186         if($prvcachecontrol) {
 187
 188                 // it is a private photo that they have no permission to view.
 189                 // tell the browser not to cache it, in case they authenticate
 190                 // and subsequently have permission to see it
 191
 192                 header("Cache-Control: no-store, no-cache, must-revalidate");
 193
 194         }
 195         else {
 196
 197                 header("Expires: " . gmdate("D, d M Y H:i:s", time() + (3600*24)) . " GMT");
 198                 header("Cache-Control: max-age=" . (3600*24));
 199
 200         }
 201         echo $data;
 202         killme();
 203         // NOTREACHED
 204 }