$val) {
if (strpos(strtolower($url), strval($key)) === 0) {
$err_id = $key;
break;
}
}
# blank page
if ($url === TAG_BLANK) {
echo get_page('');
}
# blank image
elseif ($url === TAG_BLANK_IMG) {
$msg = trim($msg);
if(strpos($msg, "maxlen_") !== false) {
$maxlen = intval(trim(str_replace("maxlen_", "", $url)));
filter_by_image_size($cl['u'], $maxlen);
exit();
}
else {
# --------------------------------------------------------------
# return blank image
# --------------------------------------------------------------
header("Content-Type: image/gif;"); // charset=windows-1251");
echo GIF_BODY;
}
}
# error code
elseif ($err_id !== 0) {
$er_msg = strstr($_GET['url'], ' ');
echo get_error_page($err_id, $er_msg);
}
# redirect url
elseif ((strpos(strtolower($url), "http://") === 0) or (strpos(strtolower($url), "https://") === 0)) {
# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# redirect to specified url
# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
header("HTTP/1.0");
header("Location: $url", '', 302);
}
// error arguments
else {
echo get_page("sgerror: error arguments $url");
}
}
else {
echo get_page($_SERVER['QUERY_STRING']); //$url . implode(" ", $_GET));
# echo get_error_page(500);
}
# ~~~~~~~~~~
# Exit
# ~~~~~~~~~~
exit();
# ----------------------------------------------------------------------------------------------------------------------
# functions
# ----------------------------------------------------------------------------------------------------------------------
function get_page($body) {
$str = Array();
$str[] = '';
$str[] = "\n$body\n";
$str[] = '';
return implode("\n", $str);
}
# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# IE displayed self-page, if them size > 1024
# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
function get_error_page($er_code_id, $err_msg='') {
global $err_code;
global $cl;
global $g;
global $config;
$str = Array();
header("HTTP/1.1 " . $err_code[$er_code_id]);
$str[] = '';
$str[] = '';
if ($config['installedpackages']['squidguarddefault']['config'][0]['deniedmessage']) {
$str[] = "{$config['installedpackages']['squidguarddefault']['config'][0]['deniedmessage']}: {$err_code[$er_code_id]}
";
} else {
$str[] = "Request denied by {$g['product_name']} proxy: {$err_code[$er_code_id]}
";
}
if ($err_msg) $str[] = " Reason: $err_msg";
$str[] = '
';
if ($cl['a']) $str[] = " Client address: {$cl['a']}
";
if ($cl['n']) $str[] = " Client name: {$cl['n']}
";
if ($cl['i']) $str[] = " Client user: {$cl['i']}
";
if ($cl['s']) $str[] = " Client group: {$cl['s']}
";
if ($cl['t']) $str[] = " Target group: {$cl['t']}
";
if ($cl['u']) $str[] = " URL: {$cl['u']}
";
$str[] = '
';
$str[] = "";
$str[] = "";
return implode("\n", $str);
}
function get_about() {
global $err_code;
global $page_info;
$str = Array();
// about info
$s = str_replace("\n", "
", $page_info);
$str[] = $s;
$str[] = "
";
$str[] = '';
$str[] = ' HTTP error codes (ERROR_CODE):';
foreach($err_code as $val) {
$str []= "| $val";
}
$str[] = ' |
';
return implode("\n", $str);
}
function filter_by_image_size($url, $val_size) {
# load url header
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_HEADER, 1);
curl_setopt($ch, CURLOPT_NOBODY, 1);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
$hd = curl_exec($ch);
curl_close($ch);
$size = 0;
$SKEY = "content-length:";
$s_tmp = strtolower($hd);
$s_tmp = str_replace("\n", " ", $s_tmp); # replace all "\n"
if (strpos($s_tmp, $SKEY) !== false) {
$s_tmp = trim(substr($s_tmp, strpos($s_tmp, $SKEY) + strlen($SKEY)));
$s_tmp = trim(substr($s_tmp, 0, strpos($s_tmp, " ")));
if (is_numeric($s_tmp))
$size = intval($s_tmp);
else $size = 0;
}
# === check url type and content size ===
# redirect to specified url
if (($size !== 0) && ($size < $val_size)) {
header("HTTP/1.0");
header("Location: $url", '', 302);
}
# return blank image
else {
header("Content-Type: image/gif;");
echo GIF_BODY;
}
}
?>