BPplayurl.php

<?php
/* Config */
$upstream_pc_url = 'https://api.bilibili.com/pgc/player/web/playurl';
$upstream_pc_url_v2 = 'https://api.bilibili.com//pgc/player/web/v2/playurl';
$upstream_app_url = 'https://api.bilibili.com/pgc/player/api/playurl';
$upstream_pc_search_url = 'https://api.bilibili.com/x/web-interface/search/type';
$upstream_pc_qr_login = 'https://passport.bilibili.com/x/passport-login/web/qrcode/poll';
$timeout = 5;
// seconds
/* Read incoming request */
$request_method = $_SERVER['REQUEST_METHOD'];
$request_query = $_SERVER['QUERY_STRING'];
$request_uri = $_SERVER['REQUEST_URI'];
$req_referer = $_SERVER['HTTP_REFERER'];
$request_headers = getallheaders();
$request_body = file_get_contents('php://input');
//通过request_query字符串生成queries键值对
foreach(explode('&', $request_query)as $value) {
	$request_query_tmp = explode('=', $value);
	$queries[$request_query_tmp[0]] = $request_query_tmp[1];
}
/*tool*/
//某个字符串在另一个字符串第N此出现的下标
function str_n_pos($str, $find, $n) {
	$pos_val = 0;
	for ($i = 1; $i <= $n; $i++) {
		$pos = strpos($str, $find);
		$str = substr($str, $pos + 1);
		$pos_val = $pos + $pos_val + 1;
	}
	$count = $pos_val - 1;
	return $count;
}
function array_remove_by_key($arr, $key) {
	if (!array_key_exists($key, $arr)) {
		return $arr;
	}
	$keys = array_keys($arr);
	$index = array_search($key, $keys);
	if ($index !== FALSE) {
		array_splice($arr, $index, 1);
	}
	return $arr;
}
/* Forward request */
$ch = curl_init();
//处理请求相关header
$request_headers = array_remove_by_key($request_headers, 'Host');
$request_headers = array_remove_by_key($request_headers, 'X-Forwarded-For');
//配置body压缩方式
$request_headers = array_remove_by_key($request_headers, 'Accept-Encoding');
curl_setopt($ch, CURLOPT_ENCODING, "identity");
//好像b站只有br压缩
$headers = array();
foreach($request_headers as $key => $value) {
	$headers[] = $key.': '.$value;
}
//判断请求接口
if (substr_count($request_uri, '/auth/set_cookie_qrcode') != 0) {
	$url = $upstream_pc_qr_login.'?'.$request_query;
	curl_setopt($ch, CURLOPT_REFERER, $req_referer);
} elseif (substr_count($request_uri, '/search/type') != 0) {
	//搜索接口强制需要buvid3这个cookie,应该与账号无关,访问https://api.bilibili.com/x/frontend/finger/spi可直接获取
	if (substr_count($request_query, 'buvid3') != 0)
	        array_push($headers, "cookie: buvid3=".$queries['buvid3']);
	$url = $upstream_pc_search_url.'?'.$request_query;
	curl_setopt($ch, CURLOPT_REFERER, $req_referer);
} elseif(substr_count($request_uri, 'playurl') != 0) {
	//判断使用的那个pc还是app接口
	if (substr_count($request_query, 'platform=android') != 0) {
		$url = $upstream_app_url.'?'.$request_query;
		curl_setopt($ch, CURLOPT_USERAGENT, 'Bilibili Freedoooooom/MarkII');
		//新版本的视频接口
	} elseif(substr_count($request_uri, '/v2/playurl') != 0 ) {
		$url = $upstream_pc_url_v2.'?'.$request_query;
		curl_setopt($ch, CURLOPT_REFERER, $req_referer);
	} else {
		$url = $upstream_pc_url.'?'.$request_query;
		curl_setopt($ch, CURLOPT_REFERER, $req_referer);
	}
} else {
	header('HTTP/1.1 502 Bad Gateway');
	header('Content-Type: text/plain');
	echo 'Failed to match interface./r/n';
	return 1;
}
//url配置
curl_setopt($ch, CURLOPT_TIMEOUT, $timeout);
curl_setopt($ch, CURLOPT_CUSTOMREQUEST, $request_method);
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
curl_setopt($ch, CURLOPT_POSTFIELDS, $request_body);
curl_setopt($ch, CURLOPT_HEADER, true);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, false);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$response = curl_exec($ch);
if ($response === false) {
	header('HTTP/1.1 502 Bad Gateway');
	header('Content-Type: text/plain');
	echo 'Upstream host did not respond.';
} else {
	$header_length = curl_getinfo($ch, CURLINFO_HEADER_SIZE);
	$response_headers = explode("\n", substr($response, 0, $header_length));
	$response_body = substr($response, $header_length);
	//处理返回相关header
	foreach($response_headers as $n => $response_header) {
		//配置返回的body压缩方式
		if (strpos($response_header, "Content-Encoding") !== false) {
			$response_headers[$n] = "Content-Encoding: identity\n";
		}
		//删除B站返回的Content-Length,防止浏览器只读取Content-Length长度的数据,造成json不完整
		if (strpos($response_header, "Content-Length") !== false) {
			unset($response_headers[$n]);
			//header('Content-Length: '.strlen($response_body));
		}
		if (strpos($response_header, "Set-Cookie") !== false) {
			$response_headers[$n] = str_replace("Domain=bilibili.com","Secure;samesite=none;Domain=".$_SERVER[HTTP_HOST],$response_headers[$n]);
		}
	}
	unset($response_header);
	/*跨域问题*/
	header('access-control-allow-credentials: true');
	header('access-control-allow-origin: '.substr($req_referer, 0, str_n_pos($req_referer, '/', 3)));
	header('access-control-allow-headers: *');
	foreach($response_headers as $header) {
		$header = trim($header);
		if (substr_count($header,'Set-Cookie') != 0) {
			//允许set-cookie出现多个
			header(trim($header),false);
		} elseif ($header) {
			header(trim($header));
		}
	}
	echo $response_body;
}
curl_close($ch);
?>