mod/photo.php

   1 <?php
   2
   3 require_once('include/security.php');
   4 require_once('include/Photo.php');
   5
   6 function photo_init(&$a) {
   7         global $_SERVER;
   8
   9         $prvcachecontrol = false;
  10
  11         switch($a->argc) {
  12                 case 4:
  13                         $person = $a->argv[3];
  14                         $customres = intval($a->argv[2]);
  15                         $type = $a->argv[1];
  16                         break;
  17                 case 3:
  18                         $person = $a->argv[2];
  19                         $type = $a->argv[1];
  20                         break;
  21                 case 2:
  22                         $photo = $a->argv[1];
  23                         break;
  24                 case 1:
  25                 default:
  26                         killme();
  27                         // NOTREACHED
  28         }
  29
  30         //      strtotime($_SERVER['HTTP_IF_MODIFIED_SINCE']) >= filemtime($localFileName)) {
  31         if (isset($_SERVER['HTTP_IF_MODIFIED_SINCE'])) {
  32                 header('HTTP/1.1 304 Not Modified');
  33                 header("Last-Modified: " . gmdate("D, d M Y H:i:s", time()) . " GMT");
  34                 header('Etag: '.$_SERVER['HTTP_IF_NONE_MATCH']);
  35                 header("Expires: " . gmdate("D, d M Y H:i:s", time() + (31536000)) . " GMT");
  36                 header("Cache-Control: max-age=31536000");
  37                 if(function_exists('header_remove')) {
  38                         header_remove('Last-Modified');
  39                         header_remove('Expires');
  40                         header_remove('Cache-Control');
  41                 }
  42                 exit;
  43         }
  44
  45
  46         $default = 'images/person-175.jpg';
  47
  48         if(isset($type)) {
  49
  50
  51                 /**
  52                  * Profile photos
  53                  */
  54
  55                 switch($type) {
  56
  57                         case 'profile':
  58                         case 'custom':
  59                                 $resolution = 4;
  60                                 break;
  61                         case 'micro':
  62                                 $resolution = 6;
  63                                 $default = 'images/person-48.jpg';
  64                                 break;
  65                         case 'avatar':
  66                         default:
  67                                 $resolution = 5;
  68                                 $default = 'images/person-80.jpg';
  69                                 break;
  70                 }
  71
  72                 $uid = str_replace(array('.jpg','.png'),array('',''), $person);
  73
  74                 $r = q("SELECT * FROM `photo` WHERE `scale` = %d AND `uid` = %d AND `profile` = 1 LIMIT 1",
  75                         intval($resolution),
  76                         intval($uid)
  77                 );
  78                 if(count($r)) {
  79                         $data = $r[0]['data'];
  80                         $mimetype = $r[0]['type'];
  81                 }
  82                 if(! isset($data)) {
  83                         $data = file_get_contents($default);
  84                         $mimetype = 'image/jpeg';
  85                 }
  86         }
  87         else {
  88
  89                 /**
  90                  * Other photos
  91                  */
  92
  93                 $resolution = 0;
  94                 foreach( Photo::supportedTypes() as $m=>$e){
  95                         $photo = str_replace(".$e",'',$photo);
  96                 }
  97
  98                 if(substr($photo,-2,1) == '-') {
  99                         $resolution = intval(substr($photo,-1,1));
 100                         $photo = substr($photo,0,-2);
 101                 }
 102
 103                 $r = q("SELECT `uid` FROM `photo` WHERE `resource-id` = '%s' AND `scale` = %d LIMIT 1",
 104                         dbesc($photo),
 105                         intval($resolution)
 106                 );
 107                 if(count($r)) {
 108
 109                         $sql_extra = permissions_sql($r[0]['uid']);
 110
 111                         // Now we'll see if we can access the photo
 112
 113                         $r = q("SELECT * FROM `photo` WHERE `resource-id` = '%s' AND `scale` = %d $sql_extra LIMIT 1",
 114                                 dbesc($photo),
 115                                 intval($resolution)
 116                         );
 117
 118                         if(count($r)) {
 119                                 $data = $r[0]['data'];
 120                                 $mimetype = $r[0]['type'];
 121                         }
 122                         else {
 123
 124                                 // Does the picture exist? It may be a remote person with no credentials,
 125                                 // but who should otherwise be able to view it. Show a default image to let
 126                                 // them know permissions was denied. It may be possible to view the image
 127                                 // through an authenticated profile visit.
 128                                 // There won't be many completely unauthorised people seeing this because
 129                                 // they won't have the photo link, so there's a reasonable chance that the person
 130                                 // might be able to obtain permission to view it.
 131
 132                                 $r = q("SELECT * FROM `photo` WHERE `resource-id` = '%s' AND `scale` = %d LIMIT 1",
 133                                         dbesc($photo),
 134                                         intval($resolution)
 135                                 );
 136                                 if(count($r)) {
 137                                         $data = file_get_contents('images/nosign.jpg');
 138                                         $mimetype = 'image/jpeg';
 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                                         $mimetype = 'image/jpeg';
 152                                         break;
 153                                 case 5:
 154                                         $data = file_get_contents('images/person-80.jpg');
 155                                         $mimetype = 'image/jpeg';
 156                                         break;
 157                                 case 6:
 158                                         $data = file_get_contents('images/person-48.jpg');
 159                                         $mimetype = 'image/jpeg';
 160                                         break;
 161                                 default:
 162                                         killme();
 163                                         // NOTREACHED
 164                                         break;
 165                         }
 166                 }
 167         }
 168
 169         if(isset($customres) && $customres > 0 && $customres < 500) {
 170                 $ph = new Photo($data, $mimetype);
 171                 if($ph->is_valid()) {
 172                         $ph->scaleImageSquare($customres);
 173                         $data = $ph->imageString();
 174                         $mimetype = $ph->getType();
 175                 }
 176         }
 177
 178         if(function_exists('header_remove')) {
 179                 header_remove('Pragma');
 180                 header_remove('pragma');
 181         }
 182
 183         header("Content-type: ".$mimetype);
 184
 185         if($prvcachecontrol) {
 186
 187                 // it is a private photo that they have no permission to view.
 188                 // tell the browser not to cache it, in case they authenticate
 189                 // and subsequently have permission to see it
 190
 191                 header("Cache-Control: no-store, no-cache, must-revalidate");
 192
 193         }
 194         else {
 195                 header("Last-Modified: " . gmdate("D, d M Y H:i:s", time()) . " GMT");
 196                 header('Etag: "'.md5($data).'"');
 197                 header("Expires: " . gmdate("D, d M Y H:i:s", time() + (31536000)) . " GMT");
 198                 header("Cache-Control: max-age=31536000");
 199         }
 200         echo $data;
 201         killme();
 202         // NOTREACHED
 203 }