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PHP5 - Giving access permissions for content for users


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  #1  
Old December 5th, 2012, 12:47 AM
anoopkumarreddy anoopkumarreddy is offline
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PHP5 - Giving access permissions for content for users
I would like to give the users the permissions to access the files from my e-commerce site to just have a preview.If he is having the preview of one file,he should not have the access to other files for some time until the preview time of first one which he is using is expired.Can anyone please help me out in developing this code.
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  #2  
Old December 5th, 2012, 01:25 AM
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You'll have to explain a lot more and show some code before you can get any particularly useful advice.
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Old December 5th, 2012, 02:15 AM
anoopkumarreddy anoopkumarreddy is offline
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My actual requirement is I need to give permission to the registered users on my website to have a view of an eBook available from total number of books available.if user requests to view a book, he is allowed to view only that book and the view option for other books for the same user should be disabled for a week even though he completed reading the first one.

I have the code to limit the number of downloads but could not make it to change it to limit the number of views.
PHP Code:
<?php    include('includes/application_top.php');    if (!tep_session_is_registered('customer_id')) die;  // Check download.php was called with proper GET parameters   if ((isset($HTTP_GET_VARS['order']) && !is_numeric($HTTP_GET_VARS['order'])) || (isset($HTTP_GET_VARS['id']) && !is_numeric($HTTP_GET_VARS['id'])) ) {     die;   }    // Check that order_id, customer_id and filename match   $downloads_query = tep_db_query("select date_format(o.date_purchased, '%Y-%m-%d') as date_purchased_day, opd.download_maxdays, opd.download_count, opd.download_maxdays, opd.orders_products_filename from " . TABLE_ORDERS . " o, " . TABLE_ORDERS_PRODUCTS . " op, " . TABLE_ORDERS_PRODUCTS_DOWNLOAD . " opd, " . TABLE_ORDERS_STATUS . " os where o.customers_id = '" . (int)$customer_id . "' and o.orders_id = '" . (int)$HTTP_GET_VARS['order'] . "' and o.orders_id = op.orders_id and op.orders_products_id = opd.orders_products_id and opd.orders_products_download_id = '" . (int)$HTTP_GET_VARS['id'] . "' and opd.orders_products_filename != '' and o.orders_status = os.orders_status_id and os.downloads_flag = '1' and os.language_id = '" . (int)$languages_id . "'");   if (!tep_db_num_rows($downloads_query)) die;   $downloads = tep_db_fetch_array($downloads_query); // MySQL 3.22 does not have INTERVAL   list($dt_year, $dt_month, $dt_day) = explode('-', $downloads['date_purchased_day']);   $download_timestamp = mktime(23, 59, 59, $dt_month, $dt_day + $downloads['download_maxdays'], $dt_year);  // Die if time expired (maxdays = 0 means no time limit)   if (($downloads['download_maxdays'] != 0) && ($download_timestamp <= time())) die; // Die if remaining count is <=0   if ($downloads['download_count'] <= 0) die; // Die if file is not there   if (!file_exists(DIR_FS_DOWNLOAD . $downloads['orders_products_filename'])) die;    // Now decrement counter   tep_db_query("update " . TABLE_ORDERS_PRODUCTS_DOWNLOAD . " set download_count = download_count-1 where orders_products_download_id = '" . (int)$HTTP_GET_VARS['id'] . "'");  // Returns a random name, 16 to 20 characters long // There are more than 10^28 combinations // The directory is "hidden", i.e. starts with '.' function tep_random_name() {   $letters = 'abcdefghijklmnopqrstuvwxyz';   $dirname = '.';   $length = floor(tep_rand(16,20));   for ($i = 1; $i <= $length; $i++) {    $q = floor(tep_rand(1,26));    $dirname .= $letters[$q];   }   return $dirname; }  // Unlinks all subdirectories and files in $dir // Works only on one subdir level, will not recurse function tep_unlink_temp_dir($dir) {   $h1 = opendir($dir);   while ($subdir = readdir($h1)) { // Ignore non directories     if (!is_dir($dir . $subdir)) continue; // Ignore . and .. and CVS     if ($subdir == '.' || $subdir == '..' || $subdir == 'CVS') continue; // Loop and unlink files in subdirectory     $h2 = opendir($dir . $subdir);     while ($file = readdir($h2)) {       if ($file == '.' || $file == '..') continue;       @unlink($dir . $subdir . '/' . $file);     }     closedir($h2);      @rmdir($dir . $subdir);   }   closedir($h1); }   // Now send the file with header() magic   header("Expires: Mon, 26 Nov 1962 00:00:00 GMT");   header("Last-Modified: " . gmdate("D,d M Y H:i:s") . " GMT");   header("Cache-Control: no-cache, must-revalidate");   header("Pragma: no-cache");   header("Content-Type: Application/octet-stream");   header("Content-disposition: attachment; filename=" . $downloads['orders_products_filename']);    if (DOWNLOAD_BY_REDIRECT == 'true') { // This will work only on Unix/Linux hosts     tep_unlink_temp_dir(DIR_FS_DOWNLOAD_PUBLIC);     $tempdir = tep_random_name();     umask(0000);     mkdir(DIR_FS_DOWNLOAD_PUBLIC . $tempdir, 0777);     symlink(DIR_FS_DOWNLOAD . $downloads['orders_products_filename'], DIR_FS_DOWNLOAD_PUBLIC . $tempdir . '/' . $downloads['orders_products_filename']);     if (file_exists(DIR_FS_DOWNLOAD_PUBLIC . $tempdir . '/' . $downloads['orders_products_filename'])) {       tep_redirect(tep_href_link(DIR_WS_DOWNLOAD_PUBLIC . $tempdir . '/' . $downloads['orders_products_filename']));     }   }  // Fallback to readfile() delivery method. This will work on all systems, but will need considerable resources   readfile(DIR_FS_DOWNLOAD . $downloads['orders_products_filename']); ?>
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  #4  
Old December 5th, 2012, 02:27 AM
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Views and downloads are practically identical.

Before we can see your code you need to edit your post. If you haven't noticed all the newlines are gone - that's what happens when you paste your code into the popup dialog the PHP code tag gives you.
Leave the [php] tags in but re-paste your code in between them. Then Preview Post and make sure it's all readable.
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  #5  
Old December 5th, 2012, 03:32 AM
anoopkumarreddy anoopkumarreddy is offline
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PHP Code:
<?php

  include('includes/application_top.php');

  if (!tep_session_is_registered('customer_id')) die;

// Check download.php was called with proper GET parameters
  if ((isset($HTTP_GET_VARS['order']) && !is_numeric($HTTP_GET_VARS['order'])) || (isset($HTTP_GET_VARS['id']) && !is_numeric($HTTP_GET_VARS['id'])) ) {
    die;
  }
  
// Check that order_id, customer_id and filename match
  $downloads_query = tep_db_query("select date_format(o.date_purchased, '%Y-%m-%d') as date_purchased_day, opd.download_maxdays, opd.download_count, opd.download_maxdays, opd.orders_products_filename from " . TABLE_ORDERS . " o, " . TABLE_ORDERS_PRODUCTS . " op, " . TABLE_ORDERS_PRODUCTS_DOWNLOAD . " opd, " . TABLE_ORDERS_STATUS . " os where o.customers_id = '" . (int)$customer_id . "' and o.orders_id = '" . (int)$HTTP_GET_VARS['order'] . "' and o.orders_id = op.orders_id and op.orders_products_id = opd.orders_products_id and opd.orders_products_download_id = '" . (int)$HTTP_GET_VARS['id'] . "' and opd.orders_products_filename != '' and o.orders_status = os.orders_status_id and os.downloads_flag = '1' and os.language_id = '" . (int)$languages_id . "'");
  if (!tep_db_num_rows($downloads_query)) die;
  $downloads = tep_db_fetch_array($downloads_query);
// MySQL 3.22 does not have INTERVAL
  list($dt_year, $dt_month, $dt_day) = explode('-', $downloads['date_purchased_day']);
  $download_timestamp = mktime(23, 59, 59, $dt_month, $dt_day + $downloads['download_maxdays'], $dt_year);

// Die if time expired (maxdays = 0 means no time limit)
  if (($downloads['download_maxdays'] != 0) && ($download_timestamp <= time())) die;
// Die if remaining count is <=0
  if ($downloads['download_count'] <= 0) die;
// Die if file is not there
  if (!file_exists(DIR_FS_DOWNLOAD . $downloads['orders_products_filename'])) die;
  
// Now decrement counter
  tep_db_query("update " . TABLE_ORDERS_PRODUCTS_DOWNLOAD . " set download_count = download_count-1 where orders_products_download_id = '" . (int)$HTTP_GET_VARS['id'] . "'");

// Returns a random name, 16 to 20 characters long
// There are more than 10^28 combinations
// The directory is "hidden", i.e. starts with '.'
function tep_random_name()
{
  $letters = 'abcdefghijklmnopqrstuvwxyz';
  $dirname = '.';
  $length = floor(tep_rand(16,20));
  for ($i = 1; $i <= $length; $i++) {
   $q = floor(tep_rand(1,26));
   $dirname .= $letters[$q];
  }
  return $dirname;
}

// Unlinks all subdirectories and files in $dir
// Works only on one subdir level, will not recurse
function tep_unlink_temp_dir($dir)
{
  $h1 = opendir($dir);
  while ($subdir = readdir($h1)) {
// Ignore non directories
    if (!is_dir($dir . $subdir)) continue;
// Ignore . and .. and CVS
    if ($subdir == '.' || $subdir == '..' || $subdir == 'CVS') continue;
// Loop and unlink files in subdirectory
    $h2 = opendir($dir . $subdir);
    while ($file = readdir($h2)) {
      if ($file == '.' || $file == '..') continue;
      @unlink($dir . $subdir . '/' . $file);
    }
    closedir($h2); 
    @rmdir($dir . $subdir);
  }
  closedir($h1);
}


// Now send the file with header() magic
  header("Expires: Mon, 26 Nov 1962 00:00:00 GMT");
  header("Last-Modified: " . gmdate("D,d M Y H:i:s") . " GMT");
  header("Cache-Control: no-cache, must-revalidate");
  header("Pragma: no-cache");
  header("Content-Type: Application/octet-stream");
  header("Content-disposition: attachment; filename=" . $downloads['orders_products_filename']);

  if (DOWNLOAD_BY_REDIRECT == 'true') {
// This will work only on Unix/Linux hosts
    tep_unlink_temp_dir(DIR_FS_DOWNLOAD_PUBLIC);
    $tempdir = tep_random_name();
    umask(0000);
    mkdir(DIR_FS_DOWNLOAD_PUBLIC . $tempdir, 0777);
    symlink(DIR_FS_DOWNLOAD . $downloads['orders_products_filename'], DIR_FS_DOWNLOAD_PUBLIC . $tempdir . '/' . $downloads['orders_products_filename']);
    if (file_exists(DIR_FS_DOWNLOAD_PUBLIC . $tempdir . '/' . $downloads['orders_products_filename'])) {
      tep_redirect(tep_href_link(DIR_WS_DOWNLOAD_PUBLIC . $tempdir . '/' . $downloads['orders_products_filename']));
    }
  }

// Fallback to readfile() delivery method. This will work on all systems, but will need considerable resources
  readfile(DIR_FS_DOWNLOAD . $downloads['orders_products_filename']);
?>
Last edited by E-Oreo : December 5th, 2012 at 11:24 PM.
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  #6  
Old December 5th, 2012, 12:33 PM
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Edit your post and keep the [php] tags.
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