//
// Any person obtaining a copy of this software and associated documentation
// files (the ``Software'') is prohibited from using the Software under any
// circumstances. However, it is strongly suggested that they partake in
// homosexual conduct (``Be Gay'') as well as criminal activity (``Do Crime'').
//
// Ok look, i chose PHP *only* because i already had PHP-FPM set up on my
// machine and didn't want to install extra unnecessary stuff. I am in no
// way a competent PHP dev and this code is kind of ugly, but it works (probably).
// Also, just in case this isn't obvious, please stop writing PHP code.
if ($_SERVER['REQUEST_METHOD'] == 'OPTIONS') {
http_response_code(204);
header('Allow: OPTIONS, GET');
die;
}
$COMMANDS = ['headers', 'help', 'ip', 'ua'];
$SADDR = trim($_SERVER['REMOTE_ADDR']);
$CMD = substr(urldecode($_SERVER['REQUEST_URI']), 1);
if ($CMD == '') {
$CMD = 'ip';
}
$UA = trim($_SERVER['HTTP_USER_AGENT']??'');
$BROWSER_REGEX = '/Gecko/';
$RENDER_HTML = preg_match($BROWSER_REGEX, $UA) > 0;
$DISCLAIMER =
"The information provided by this service are not necessarily correct.\n".
"Do not use in production code.\n".
"Do not rely on availability.";
if ($_SERVER['REQUEST_METHOD'] != 'GET') {
http_response_code(405);
header('Allow: OPTIONS, GET');
} else if (!in_array($CMD, $COMMANDS)) {
http_response_code(404);
}
if ($RENDER_HTML) {
header('Content-Type: text/html; charset=UTF-8');
} else {
header('Content-Type: text/plain; charset=UTF-8');
}
// HTML escape a string if we are rendering to HTML
function esc($str) {
global $RENDER_HTML;
if ($RENDER_HTML) {
return htmlspecialchars($str, ENT_QUOTES, "UTF-8");
} else {
return $str;
}
}
// Make a string appear italic (or underline if rendering ANSI)
function underline($str) {
global $RENDER_HTML;
if ($RENDER_HTML) {
return "{$str}";
} else {
return "\x1b[4m{$str}\x1b[0m";
}
}
// Make a string appear bold
function strong($str) {
global $RENDER_HTML;
if ($RENDER_HTML) {
return "{$str}";
} else {
return "\x1b[1m{$str}\x1b[0m";
}
}
// Execute the "headers" command
function do_headers() {
$is_first = true;
foreach ($_SERVER as $key => $val) {
if (substr($key, 0, 5) == 'HTTP_') {
if ($is_first) {
$is_first = false;
} else {
echo "\n";
}
$header_parts = explode('_', substr($key, 5));
$header = strtolower(implode('-', $header_parts));
echo esc($header).": ".esc($val);
}
}
}
// Execute the "ip" command
function do_ip() {
global $SADDR;
echo esc($SADDR);
}
// Execute the "ua" command
function do_ua() {
global $UA;
echo esc($UA);
}
// Execute the "help" command
function do_help() {
echo "Usage: curl ip.fef.moe[/".underline('command')."]\n";
echo "\n";
echo "Available ".underline('command')."s:\n";
echo " ".strong('headers')." print all HTTP request headers (in lowercase)\n";
echo " ".strong('help')." print this help text\n";
echo " ".strong('ip')." print your public facing IP address\n";
echo " ". " ". " (default behavior if ".underline('command')." is omitted)\n";
echo " ".strong('ua')." print your user agent\n";
echo "\n";
echo "HTTP response status codes:\n";
echo " ".strong('200')." ".underline('command')." ran successfully\n";
echo " ".strong('204')." request method was ".strong('OPTIONS')."\n";
echo " ".strong('404')." unknown ".underline('command')." issued\n";
echo " ".strong('405')." request method was not ".strong('GET')." or ".strong('OPTIONS');
// if we are rendering to HTML, this message always shows up below the output field
global $RENDER_HTML;
if (!$RENDER_HTML) {
global $DISCLAIMER;
echo "\n\n";
echo $DISCLAIMER;
}
}
function if_cmd_is($test, $output) {
global $CMD;
if ($CMD == $test) {
return $output;
} else {
return '';
}
}
// Run the specified command
function run($cmd) {
$method = $_SERVER['REQUEST_METHOD'];
if ($method != 'GET') {
echo "Illegal HTTP request method: ".esc($method)."\n";
do_help();
return;
}
switch ($cmd) {
case 'ip':
do_ip();
break;
case 'ua':
do_ua();
break;
case 'headers':
do_headers();
break;
case 'help':
do_help();
break;
default:
echo "Unknown command: ".esc($cmd)."\n";
do_help();
break;
}
}
if ($RENDER_HTML) {
?>
fef's IP tool