file_echo.php

   1 <?php
   2 /* vim: set expandtab sw=4 ts=4 sts=4: */
   3 /**
   4  * "Echo" service to allow force downloading of exported charts (png or svg)
   5  * and server status monitor settings
   6  *
   7  * @package phpMyAdmin
   8  */
   9
  10 require_once './libraries/common.inc.php';
  11
  12 /* For chart exporting */
  13 if (isset($_REQUEST['filename']) && isset($_REQUEST['image'])) {
  14     $allowed = array(
  15         'image/png'     => 'png',
  16         'image/svg+xml' => 'svg',
  17     );
  18
  19     /* Check whether MIME type is allowed */
  20     if (! isset($allowed[$_REQUEST['type']])) {
  21         die('Invalid export type');
  22     }
  23
  24     /*
  25      * Check file name to match mime type and not contain new lines
  26      * to prevent response splitting.
  27      */
  28     $extension = $allowed[$_REQUEST['type']];
  29     $valid_match = '/^[^\n\r]*\.' . $extension . '$/';
  30     if (! preg_match($valid_match, $_REQUEST['filename'])) {
  31         if (! preg_match('/^[^\n\r]*$/', $_REQUEST['filename'])) {
  32             /* Filename is unsafe, discard it */
  33             $filename = 'download.' . $extension;
  34         } else {
  35             /* Add extension */
  36             $filename = $_REQUEST['filename'] . '.' . $extension;
  37         }
  38     } else {
  39         /* Filename from request should be safe here */
  40         $filename = $_REQUEST['filename'];
  41     }
  42
  43     /* Decode data */
  44     if ($extension != 'svg') {
  45         $data = substr($_REQUEST['image'], strpos($_REQUEST['image'], ',') + 1);
  46         $data = base64_decode($data);
  47     } else {
  48         $data = $_REQUEST['image'];
  49     }
  50
  51     /* Send download header */
  52     PMA_download_header($filename, $_REQUEST['type'], strlen($data));
  53
  54     /* Send data */
  55     echo $data;
  56
  57 /* For monitor chart config export */
  58 } else if (isset($_REQUEST['monitorconfig'])) {
  59     PMA_download_header('monitor.cfg', 'application/force-download');
  60     echo urldecode($_REQUEST['monitorconfig']);
  61
  62 /* For monitor chart config import */
  63 } else if (isset($_REQUEST['import'])) {
  64     header('Content-type: text/plain');
  65     if(!file_exists($_FILES['file']['tmp_name'])) exit();
  66     echo file_get_contents($_FILES['file']['tmp_name']);
  67 }
  68 ?>