<?php

$app = include 'app.php';
$url = parse_url($_POST['url']);
$error = '';

if ($url['scheme'] != 'http') {
    $error = 'Ссылка должна начинаться с "http://"';
}
else if (!$url['path'] || $url['path'] == '/') {
    $error = 'Не указан путь до файла';
}
else {
    $fh = fsockopen($url['host'], $url['port'] ? $url['port'] : 80, $errno, $error, 1);

    if ($fh) {
        fwrite($fh, "GET " . $url['path'] . ($url['query'] ? '?' . $url['query'] : '') . " HTTP/1.1\r\nHost: {$url['host']}\r\nConnection: close\r\n\r\n");
        $status = explode(' ', fgets($fh), 3);

        if ($status[1] != 200) {
            $error = $status[1] . ' ' . $status[2];
        }
        else {
            $headers = array();

            while (1) {
               $header = rtrim( fgets($fh) );

               // \r\n\r\n заголовки кончились
               if ($header == '') {
                   break;
               }

               list($key, $val) = explode(': ', $header);
               $headers[ strtolower($key) ] = $val;
           }

           if ( !preg_match('#^image/(' . implode('|', $app['allowedImageTypes']) . ')$#', $headers['content-type']) ) {
               $error = $app['someErrors']['invalidFileType'];
           }
           else if ( $headers['content-length'] < $app['minImageSize'] ) {
               $error = $app['someErrors']['imageTooSmall'];
           }
           else if ( $headers['content-length'] > $app['maxImageSize'] ) {
               $error = $app['someErrors']['imageTooBig'];;
           }
           else {
               $data = '';

               while ( !feof($fh) ) {
                   $data .= fread($fh, 8192);
               }

               echo( 'data:' . $headers['content-type'] . ';base64,' . base64_encode($data) );
           }
        }

        fclose($fh);
    }
}

if ($error) {
    echo("error:$error");
}

?>