[英]How to retrieve HttpResponseMessage content headers for a live media stream (in a windows store app using c#)
我正在制作一個適用於Windows 8.1的在線廣播應用程序,並希望使用新的Windows.Web.Http API
與shoutcast
服務器進行通信(以便發送自定義HTTP標頭以從實時媒體流中獲取元數據)。
響應標頭為空,在開始讀取流數據之前,我需要讀取內容標頭。
這是我嘗試使用的代碼:
Uri uri = new Uri(Url);
var baseFilter = new HttpBaseProtocolFilter();
ShoutcastHttpFilter filter = new ShoutcastHttpFilter(baseFilter);
var HClient = new HttpClient(filter);
HttpResponseMessage response = await HClient.GetAsync(uri, HttpCompletionOption.ResponseHeadersRead);
Task streaming = null;
Stream stream = null;
stream = response.Content.ReadAsInputStreamAsync().GetResults().AsStreamForRead();
string str = response.Content.Headers["Icy-MetaInt"];
當我運行/調試代碼時,內容顯示為“未緩沖”且沒有標題。 如何獲取內容標頭和流?
這是我在ShoutcastHttpFilter中使用的代碼:
request.Headers.Clear();
request.Headers.Add("Icy-MetaData", "1");
request.Headers["User-Agent"] = "VLC media player";
request.Headers["Connection"] = "Close";
HttpResponseMessage response = await innerFilter.SendRequestAsync(request).AsTask(cancellationToken, progress);
cancellationToken.ThrowIfCancellationRequested();
return response;
如果標頭名稱不是以Content-*
開頭的,則標頭必須位於響應標頭中。
做這個:
Uri uri = new Uri("http://example.com");
HttpClient client = new HttpClient();
HttpResponseMessage response = await client.GetAsync(
uri,
HttpCompletionOption.ResponseHeadersRead);
string value = response.Headers["Icy-MetaInt"];
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