course-tencent-cloud/app/Services/Live.php

<?php

namespace App\Services;

class Live extends Service
{

    protected $config;

    public function __construct()
    {
        $this->config = $this->getSectionConfig('live');
    }

    /**
     * 获取推流地址
     *
     * @param string $streamName
     * @return string
     */
    function getPushUrl($streamName)
    {
        $authEnabled = $this->config->push_auth_enabled;
        $authKey = $this->config->push_auth_key;
        $expireTime = $this->config->push_auth_delta + time();
        $domain = $this->config->push_domain;
        $appName = 'live';

        $authParams = $this->getAuthParams($streamName, $authKey, $expireTime);

        $pushUrl = "rtmp://{$domain}/{$appName}/{$streamName}";
        $pushUrl .= $authEnabled ? "?{$authParams}" : '';

        return $pushUrl;
    }

    /**
     * 获取拉流地址
     *
     * @param string $streamName
     * @param string $format
     * @return mixed
     */
    public function getPullUrls($streamName, $format)
    {
        $extension = ($format == 'hls') ? 'm3u8' : $format;

        $extensions = ['flv', 'm3u8'];

        if (!in_array($extension, $extensions)) return;

        $appName = 'live';

        $protocol = $this->config->pull_protocol;
        $domain = $this->config->pull_domain;
        $authEnabled = $this->config->pull_auth_enabled;
        $transEnabled = $this->config->pull_trans_enabled;
        $authKey = $this->config->pull_auth_key;
        $expireTime = $this->config->pull_auth_delta + time();

        $urls = [];

        if ($transEnabled) {
            foreach (['fd', 'sd', 'hd', 'od'] as $rateName) {
                $realStreamName = ($rateName == 'od') ? $streamName : "{$streamName}_{$rateName}";
                $authParams = $this->getAuthParams($realStreamName, $authKey, $expireTime);
                $url = "{$protocol}://{$domain}/{$appName}/{$realStreamName}.{$extension}";
                $url .= $authEnabled ? "?{$authParams}" : '';
                $urls[$rateName] = $url;
            }
        } else {
            $authParams = $this->getAuthParams($streamName, $authKey, $expireTime);
            $url = "{$protocol}://{$domain}/{$appName}/{$streamName}.{$extension}";
            $url .= $authEnabled ? "?{$authParams}" : '';
            $urls['od'] = $url;
        }

        return $urls;
    }

    /**
     * 获取鉴权参数
     *
     * @param string $streamName
     * @param string $authKey
     * @param integer $expireTime
     * @return string
     */
    protected function getAuthParams($streamName, $authKey, $expireTime)
    {
        $txTime = strtoupper(base_convert($expireTime, 10, 16));

        $txSecret = md5($authKey . $streamName . $txTime);

        $authParams = http_build_query([
            'txSecret' => $txSecret,
            'txTime' => $txTime
        ]);

        return $authParams;
    }

}