_icons/icon.php

   1 <?php
   2
   3 // User icon serving script.
   4 // Usage: http://URL/_icon/user/{icon_id}
   5
   6 // Run includes
   7 define("context","icons");
   8 require_once(dirname(dirname(__FILE__))."/includes.php");
   9
  10 // If an ID number for the file has been specified ...
  11 $id = optional_param('id',0,PARAM_INT);
  12 $default = false;
  13 if (!$id) {
  14     $default = true;
  15 }
  16 // ... and the file exists ...
  17 if (!$file = get_record('icons','ident',$id)) {
  18     $default = true;
  19 }
  20 // get the user who belongs to this icon..
  21 if (empty($file) || !$user = get_record('users','ident',$file->owner)) {
  22     $default = true;
  23 }
  24 if (!$default) {
  25     $upload_folder = substr($user->username,0,1);
  26     $filepath = $CFG->dataroot . "icons/" . $upload_folder . "/" . $user->username . "/".$file->filename;
  27     if (!file_exists($filepath)) {
  28         $default = true;
  29     }
  30 }
  31
  32 require_once($CFG->dirroot . 'lib/filelib.php');
  33 require_once($CFG->dirroot . 'lib/iconslib.php');
  34
  35 if ($default) {
  36     $filepath = $CFG->dirroot.'_icons/data/default.png';
  37     $mimetype = 'image/png';
  38 } else {
  39     $mimetype = mimeinfo('type', $file->filename);
  40 }
  41
  42
  43 // Then output some appropriate headers and send the file data!
  44
  45 // see if we must resize it.
  46 $constraint1 = strtolower(optional_param('constraint1'));
  47 $size1 = optional_param('size1', PARAM_INT);
  48 $constraint2 = strtolower(optional_param('constraint2'));
  49 $size2 = optional_param('size2', PARAM_INT);
  50
  51 // if size == 100, leave it.
  52 $phpthumb = false;
  53 $phpthumbconfig = array();
  54 if (($constraint1 == 'h' || $constraint1 == 'w') && $size1 != 100) {
  55     $phpthumb = true;
  56     $phpthumbconfig[$constraint1] = $size1;
  57 }
  58 if (($constraint2 == 'h' || $constraint2 == 'w') && $size2 != 100) {
  59     $phpthumb = true;
  60     $phpthumbconfig[$constraint2] = $size2;
  61 }
  62
  63 // images most likely don't want compressing, and this will kill the Vary header
  64 if (function_exists('apache_setenv')) { // apparently @ isn't enough to make php ignore this failing
  65     @apache_setenv('no-gzip', '1');
  66 }
  67
  68 // user icons are public
  69 header("Pragma: public");
  70 header("Cache-Control: public");
  71
  72 if (!$default && !$phpthumb && ($constraint1 == 'h' || $constraint1 == 'w') && (!$constraint2 || $constraint2 == 'h' || $constraint2 == 'w')) {
  73     // 100 pixels requested, redirect to attributeless icon url for cacheability fun
  74     header($_SERVER['SERVER_PROTOCOL'] . " 301 Moved Permanently");
  75     header("Location: " . $CFG->wwwroot . '_icon/user/' . $id);
  76     die();
  77 }
  78
  79 if ($phpthumb) {
  80     // let phpthumb manipulate the image
  81     spit_phpthumb_image($filepath, $phpthumbconfig);
  82 } elseif ($default) {
  83     // no manipulation and default icon
  84     if ($id == -1) {
  85         header($_SERVER['SERVER_PROTOCOL'] . " 301 Moved Permanently");
  86     }
  87     header("Location: " . $CFG->wwwroot . '_icons/data/default.png');
  88     die();
  89 } else {
  90     // output the image directly
  91     spitfile_with_mtime_check ($filepath, $mimetype);
  92 }
  93
  94 ?>