}
}
if (is_null($length)) {
die_and_log($status = 400, "unknown content size:", $url);
}
if ($length > MAX_SIZE) {
die_and_log($status = 400, "content size over: " . MAX_SIZE . "<{$length}bytes", $url);
}
if (!preg_match("/\\Aimage\\/(png|jpeg|gif)\\z/ui", $content_type)) {
die_and_log($status = 400, "not support content type:" . $content_type, $url);
}
// get access
$c = new Curl();
$c->setHeader('X-Forwarded-For', getRemoteIP());
$c->error(function () {
die_and_log($status = 500, "get request error");
});
$c->get($url);
// dump
header("Content-Type: {$content_type}");
echo $c->response;
//--functions--
function die_and_log($status = 400, $str = '', $extra = '')
{
header("HTTP/1.1 {$status} Error");
echo $str;
error_log("{$str} :: {$extra}");
exit;
}
function getRemoteIP()
{
<?php
require "vendor/autoload.php";
ini_set('post_max_size', '5M');
$data_url = $_POST['data_url'];
$matches = [];
$res = preg_match('/\\Adata:image\\/(png|gif|jpeg);base64,(.*)\\z/i', $data_url, $matches);
if ($res !== 1) {
die_and_log($status = 400, 'invalid data');
}
$img_type = $matches[1];
$raw = base64_decode($matches[2]);
// dump
header("Content-Type: image/{$img_type}");
header("Content-Disposition: attachment; filename=\"lgtm_" . time() . ".{$img_type}\"");
header("Expires: 1");
header("Cache-Control: no-cache");
header("Pragma: no-cache");
echo $raw;
//--functions--
function die_and_log($status = 400, $str = '', $extra = '')
{
header("HTTP/1.1 {$status} Error");
echo $str;
error_log("{$str} :: {$extra}");
exit;
}
