<?php
# request.php > request_confirm.php > upload.php > upload_confirm.php

## Recent Changes
# Support multiple mirrors

require "/home/hpr/php/include.php";

$ip = $_SERVER["REMOTE_ADDR"];

if ( $_SERVER['REQUEST_METHOD'] !== 'GET' ) {
  naughty("34522f7b9ba88b319afa9f063b98905c");
}

if ( empty($_SERVER["REMOTE_ADDR"]) ) {
  naughty("021dbd5f91f40918ea68fd0ca1a2e381");
}

if ( count($_GET) !== 1 ) {
  naughty("f5df1c0d9accb7868e601b60cf2f5c06");
}

if ( isset($_GET["filename"]) ) {

  $filename = $_GET["filename"];
  if ( empty($filename) ) {
    naughty("ef50f1353583f371903daba3abc9b3a4");
  }

  $filename = filter_var($filename, FILTER_UNSAFE_RAW, FILTER_FLAG_STRIP_LOW|FILTER_FLAG_STRIP_HIGH);

  $dirname = dirname("$filename", 2);
  if ( empty($dirname) ) {
    naughty("71b6b14eef459e0404311257dad8ffe4");
  }
 
  if ( $dirname === "/" ) {
    naughty("9e342e30b911e1ac3c5e831a6da6116b");
  }

  if ( !(
    strcmp($dirname, "/correspondents") === 0 or
    strcmp($dirname, "/eps") === 0 or
    strcmp($dirname, "/series") === 0 )
    ) {
    naughty("f157a8f5fedc7282c7a6469931223dbf");
  }

  $name = basename($filename); // To get file name
  if ( empty($name) ) {
    naughty("27ece7c2dba5caa5885ef40737270fd3");
  }

  $ext = pathinfo($filename, PATHINFO_EXTENSION); // To get extension
  if ( empty($ext) ) {
    naughty("c6a4329fe2f3c2c739ec666e956c2c5f");
  }

  $prefix = pathinfo($filename, PATHINFO_FILENAME); // File name without extension
  if ( empty($prefix) ) {
    naughty("f398399ec10ec9ab4b5b23ae43f21b01");
  }

  if ( strlen($filename) < 5 ) {
    naughty("f78bf180af9239fc7fcf5fbc2b13b59b");
  }

  if ( strlen($filename) > 60 ) {
    naughty("38e9a0cf7f650ac62e75c08269c9d913");
  }

  if (!in_array( $ext, $allowed_extensions, true )) {
    logextra( "This extension $this_ext, is not in the list of allowed_extensions" );
    naughty("545e49f7ac913863c6c3db40670ebb9d");
  }

}
else {
  naughty("0b78322e1c5010ba289c20250ca1fb1f");
}

if ( 
  strcmp($dirname, "/eps") === 0 and
  in_array( $ext, $allowed_extensions_common, true )
  ) {
  $mirrors = array_merge($ccdn_hosts_common, $ccdn_hosts_complete);
}
else {
  $mirrors = $ccdn_hosts_complete;
}

$mirror = 'https://' . $mirrors[ array_rand($mirrors, 1) ];

$pos = strpos($mirror, 'archive.org');

if ($pos !== false) {
     $path = $mirror . '/download/' . $prefix . '/' . $name;
} else {
     $path = $mirror . $filename;
}

logextra( "Sending request to ${path}" );

header("location:${path}");

?>