抖音直播弹幕抓取PHP版本

最近需要抓取抖音直播的弹幕消息，网上找了一下基本上都是 python 的版本，虽然用起来没有太大的影响，但本着 PHP 是世界上最好的语言 就写了一个简单的脚本方便使用。以下是主要代码：

1. 首先通过直播链接获取 ttwid

   $client = new Client();
   
        $response =  $client->get($liveUrl, [
            'headers' => [
                'accept' => 'text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9',
                'User-Agent' => 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/107.0.0.0 Safari/537.36',
                'cookie' => '__ac_nonce=0638733a400869171be51',
            ]
        ]);
   $cookieString = $response->getHeader('Set-Cookie');
   $cookieArray = explode(';', $cookieString[0]);
   $ttwidStr = $cookieArray[0];
   return substr($ttwidStr, strpos($ttwidStr, '=') + 1);

2. 在通过该链接解析出roomid

        $html = $response->getBody()->getContents();
        $pattern = '/roomId\\\\":\\\\"(\d+)\\\\"/';
        preg_match($pattern, $html, $matches);
   
        return $matches[1];

3. 拼接出websocket 连接和请求头

   $header = [
                'cookie' => 'ttwid=' . $ttwid,
                'user-agent' => 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/108.0.0.0 Safari/537.36',
            ];
            $webSocketUrl = 'ws://webcast3-ws-web-lq.douyin.com/webcast/im/push/v2/?app_name=douyin_web&version_code=180800&webcast_sdk_version=1.3.0&update_version_code=1.3.0&compress=gzip&internal_ext=internal_src:dim|wss_push_room_id:' . $liveRoomId . '|wss_push_did:7188358506633528844|dim_log_id:20230521093022204E5B327EF20D5CDFC6|fetch_time:1684632622323|seq:1|wss_info:0-1684632622323-0-0|wrds_kvs:WebcastRoomRankMessage-1684632106402346965_WebcastRoomStatsMessage-1684632616357153318&cursor=t-1684632622323_r-1_d-1_u-1_h-1&host=https://live.douyin.com&aid=6383&live_id=1&did_rule=3&debug=false&maxCacheMessageNumber=20&endpoint=live_pc&support_wrds=1&im_path=/webcast/im/fetch/&user_unique_id=7188358506633528844&device_platform=web&cookie_enabled=true&screen_width=1440&screen_height=900&browser_language=zh&browser_platform=MacIntel&browser_name=Mozilla&browser_version=5.0%20(Macintosh;%20Intel%20Mac%20OS%20X%2010_15_7)%20AppleWebKit/537.36%20(KHTML,%20like%20Gecko)%20Chrome/113.0.0.0%20Safari/537.36&browser_online=true&tz_name=Asia/Shanghai&identity=audience&room_id=' . $liveRoomId . '&heartbeatDuration=0&signature=00000000';

4. 最后通过workman 中的AsyncTcpConnection 进行链接获取数据

$wsClient = new AsyncTcpConnection($webSocketUrl);

            // 设置以ssl加密方式访问，使之成为wss
            $wsClient->transport = 'ssl';
            $wsClient->headers = $header;

            $parseMsg = new ParseMsg($conn);

            $wsClient->onMessage = [$parseMsg, 'on_message'];

            $wsClient->connect();

具体具体的解析代码和 protobuf 我放在github 上面了，需要的朋友自己去看吧。

还有一个比较重要的点是弹幕消息是通过google 的 protobuf 协议进行编码，需要大家了解一下protobuf 协议

抖音直播弹幕抓取 (github.com)

提供一个测试地址吧 ws://47.93.122.172:4200

消息格式如下：

{
    "url":"https://live.douyin.com/619592756125"
}

本作品采用《CC 协议》，转载必须注明作者和本文链接