<?php

if (!defined('RAPIDLEECH')) {
	require_once('index.html');
	exit;
}

class baidu_com extends DownloadClass {
	private $userAgent = 'netdisk;5.7.2.3;PC;PC-Windows;6.1.7601;WindowsBaiduYunGuanJia';
	public function Download($link) {
		if (!preg_match('@(https?://(?:pan|yun)\.baidu\.com)/(?:s/\w+|(?:(?:wap/)?share|wap)/link\?\w+=\w+(?:&\w+=\w+)*)@i', $link, $_link)) html_error('Invalid link?.');
		$link = $GLOBALS['Referer'] = str_ireplace(array('http://', '/wap/link', '/wap/'), array('https://', '/share/link', '/'), $_link[0]);
		$host = $_link[1];
		$cookie = isset($_POST['step']) && !empty($_POST['cookie']) ? StrToCookies(decrypt(urldecode($_POST['cookie']))) : array();

		if (empty($_POST['step']) || $_POST['step'] != '1') {
			$bduss = $this->getLoginCookie();

			$page = $this->GetPage($link);
			$cookie = GetCookiesArr($page);

			// Baidu doesn't reply /s/ links without a valid BAIDUID cookie :S
			if (substr($page, 9, 3) == '403') {
				$page = $this->GetPage($link, $cookie);
				$cookie = GetCookiesArr($page, $cookie);
			}

			is_present($page, '啊哦，你所访问的页面不存在了', 'File Doesn\'t Exist');

			if (!preg_match('@yunData\.setData\((\{.+?\})\);@s', $page, $data)) html_error('yunData.setData Not Found.');
			$rawYunData = preg_replace('@([:,\[\]{}])(\d{11,})([:,\[\]{}])@', '$1"$2"$3', $data[1]); // Avoid Issues With Long IDs
			$yunData = $this->json2array($rawYunData, 'Error while parsing yunData');
			if (empty($yunData['bdstoken'])) $yunData['bdstoken'] = 'null';
		} else {
			$cookie = StrToCookies(decrypt(urldecode($_POST['cookie'])));
			$_POST['step'] = false;
			if (empty($_POST['captcha'])) html_error('You didn\'t enter the image verification code.');
			if (empty($_POST['vcode_str'])) html_error('Empty Captcha Challenge.');
			if (empty($_POST['yunData'])) html_error('[Post] Empty yunData.');
			if (empty($_POST['bduss'])) html_error('[Post] Empty bduss cookie.');
			$captcha = array('vcode_input' => urlencode($_POST['captcha']), 'vcode_str' => urlencode($_POST['vcode_str']));
			$rawYunData = decrypt(base64_decode($_POST['yunData']));
			$yunData = $this->json2array($rawYunData, '[Post] Error while parsing yunData');
			$bduss = decrypt(base64_decode($_POST['bduss']));
		}

		$post = array('encrypt' => 0, 'product' => 'share', 'uk' => $yunData['uk'], 'primaryid' => $yunData['shareid'], 'fid_list' => "%5B{$yunData['file_list']['list'][0]['fs_id']}%5D");
		if (!empty($captcha)) $post = array_merge($post, $captcha);

		$json = $this->GetPage("$host/api/sharedownload?app_id={$yunData['file_list']['list'][0]['app_id']}&bdstoken={$yunData['bdstoken']}&channel=chunlei&clienttype=0&sign={$yunData['sign']}&timestamp={$yunData['timestamp']}&web=1", $cookie, $post, $GLOBALS['Referer'] . "\r\nX-Requested-With: XMLHttpRequest");
		$data = $this->json2array($json, 'Error getting download info');

		if (!empty($data['errno'])) {
			if ($data['errno'] == -20) {
				$captcha = $this->json2array($this->GetPage("{$host}/api/getvcode?app_id={$yunData['file_list']['list'][0]['app_id']}&bdstoken={$yunData['bdstoken']}&channel=chunlei&clienttype=0&prod=share&web=1", $cookie, $post, $GLOBALS['Referer'] . "\r\nX-Requested-With: XMLHttpRequest"), 'Error getting captcha data');
				if (!empty($captcha['errno'])) html_error("Unknown captcha error [{$captcha['errno']}]");

				$data = $this->DefaultParamArr($link, $cookie, 1, 1);
				$data['step'] = 1;
				$data['yunData'] = base64_encode(encrypt($rawYunData));
				$data['bduss'] = base64_encode(encrypt($bduss));
				$data['vcode_str'] = $captcha['vcode'];

				list($headers, $imgBody) = explode("\r\n\r\n", $this->GetPage($captcha['img']), 2);
				if (substr($headers, 9, 3) != '200') html_error('Error downloading CAPTCHA img.');
				$mimetype = (preg_match('@image/[\w+]+@', $headers, $mimetype) ? $mimetype[0] : 'image/jpg');
				return $this->EnterCaptcha("data:$mimetype;base64,".base64_encode($imgBody), $data);
			} else if ($data['errno'] == 112) html_error('Expired Download Token');
			html_error("Unknown download-info error [{$data['errno']}]");
		}

		if (empty($data['list'][0]['dlink'])) html_error('Redirect-Link Not Found.');
		if (function_exists('headers2request')) $GLOBALS['Referer'] .= "\r\nUser-Agent: {$this->userAgent}"; // Changed User-Agent to "increase" download speed

		$cookie['BDUSS'] = $bduss; // Extra Cookie (Needed to Download)
		$page = $this->GetPage($data['list'][0]['dlink'], $cookie);
		if (substr($page, 9, 3) == '403') html_error('Invalid BDUSS Cookie');
		if (!preg_match('@https?://(?:[\w\-]+\.)+baidupcs(?:\.[\w\-]+)*\.com/file/[^\s\"\'<>]+@i', $page, $DL)) html_error('Download-Link Not Found.');

		return $this->RedirectDownload($DL[0], 'pan_baidu_com_placeholder');
	}

	private function getLoginCookie() {
		if (!empty($_POST['cookie'])) {
			if (!empty($_POST['cookie_encrypted'])) {
				$_POST['cookie'] = decrypt(urldecode($_POST['cookie']));
				unset($_POST['cookie_encrypted']);
			}
			$cookie = StrToCookies($_POST['cookie']);
			$_POST['cookie'] = false;
		} else if (!empty($GLOBALS['premium_acc']['baidu_com']['cookie'])) {
			$cookie = $GLOBALS['premium_acc']['baidu_com']['cookie'];
			$cookie = (is_array($cookie) ? $cookie : StrToCookies($cookie));
		}
		if (empty($cookie['BDUSS'])) html_error('Needs a Valid "BDUSS" Cookie for Download');
		return $cookie['BDUSS'];
	}
}

// [26-8-2016] Written by Th3-822.
// [30-8-2016] Switched links to http to help decrease connection errors & Changed User-Agent for "better" download speed. - Th3-822
// [18-4-2017] Fixed. - Th3-822
// [26-1-2018] Switched to https as there is now a forced redirect & fixed download (now it does require a login cookie for download). - Th3-822