AVPlayer 播放受保护的 HLS，令牌过期如何更新？

Posted 2023-02-19

【中文标题】AVPlayer 播放受保护的 HLS，令牌过期如何更新？

【英文标题】：AVPlayer playing protected HLS, how to update token when it expires?

【发布时间】：2021-12-28 13:39:06

【问题描述】：

我正在播放受保护的 HLS 流，而我的令牌在 5 分钟后过期，因此每次令牌过期时流都会下降，并且我收到错误 401 Unauthorized。问题是如何更新资产内的代币？我已经尝试在 resourceLoader loadingRequest.allHTTPHeaderFields 中更改它，但没有帮助：

  func resourceLoader(_ resourceLoader: AVAssetResourceLoader,
                            shouldWaitForLoadingOfRequestedResource loadingRequest: AVAssetResourceLoadingRequest) -> Bool 
        
DispatchQueue.main.async  [unowned self] in
                var request = loadingRequest.request
                let service = apiService as! APIServiceImplementation
                
                service.networkService.resfreshToken  result in
                    let data = apiService.prepareForLiveRequest(url: request.url!)
                    request.url = data.url
                    var mergedHeaders = request.allHTTPHeaderFields
                    mergedHeaders!["Cookie"] = (data.1.values.first! as! [String: String])["Cookie"]
                    request.allHTTPHeaderFields = mergedHeaders
                    URLSession(configuration: URLSessionConfiguration.default).dataTask(with: request) 
                        data, response, error in
                        if let error = error 
                            print(error)
                            loadingRequest.finishLoading(with: error)
                         else 
                            loadingRequest.dataRequest?.respond(with: data!)
                            loadingRequest.finishLoading()
                        
                    .resume()
                
            
            return true
        

【参考方案1】：

在 AVPlayerItem 里面没有办法更新 AVAsset，你唯一能做的就是使用本地服务器，很好的例子是https://cocoapods.org/pods/HLSCachingReverseProxyServer