ニコニコ動画のFLVファイルをDL

nicoGetFlv.php

<?php

$data = array('mail' => 'your mail address', 'password' => 'your password');
$data = http_build_query($data);
$context = stream_context_create(array(
  'http' => array(
    'method'  => 'POST',
    'header'  => implode("\r\n", array(
      'Content-Type: application/x-www-form-urlencoded',
      'Content-Length: ' . strlen($data)
    )),
    'content' => $data
  )
));
file_get_contents('https://secure.nicovideo.jp/secure/login?site=niconico', false, $context);
$cookies = array();
foreach ($http_response_header as $r) {
  if (strpos($r, 'Set-Cookie') === false) continue;
  $c = explode(' ', $r);
  $c = str_replace(';', '', $c[1]);
  $cc = explode('=', $c);
  if($cc[1] == 'deleted') continue;
  $cookies[] = $c;
}

$context= stream_context_create(array(
  'http' => array(
    'method' => 'GET',
    'header' => implode("\r\n", array(
      'Cookie: ' . implode('; ', $cookies)
    ))
  )
));
$res = file_get_contents("http://flapi.nicovideo.jp/api/getflv/{$argv[1]}", false, $context);
$r = explode('&', $res);
$result = array();
foreach ($r as $r_) {
  preg_match("/(.*?)=(.*)/", $r_, $matches);
  $result[$matches[1]] = $matches[2];
}

file_get_contents("http://www.nicovideo.jp/watch/{$argv[1]}", false, $context);
foreach ($http_response_header as $r) {
  if (strpos($r, 'Set-Cookie') === false) continue;
  $c = explode(' ', $r);
  $c = str_replace(';', '', $c[1]);
  $cc = explode('=', $c);
  if ($cc[1] == 'deleted') continue;
  $cookies[] = $c;
}

$context= stream_context_create(array(
  'http' => array(
    'method' => 'GET',
    'header' => implode("\r\n", array(
      'Cookie: ' . implode('; ', $cookies)
    ))
  )
));

$file = file_get_contents(urldecode($result['url']), false, $context);

$fp = fopen("{$argv[1]}.flv", "w");
fwrite($fp, $file);
fclose($fp);