Question

我想在asp.net应用上流式传输音频文件。我找到了一些webapi流媒体的例子，我写道：

  Public Class AudioController
    Inherits ApiController


    Public Function [Get](id As String) As HttpResponseMessage

        Dim T As iTunesLib.IITTrack = Global_asax.iTunesApp.LibraryPlaylist.Tracks.ItemByPersistentID(Convert.ToInt32(Microsoft.VisualBasic.Left(id, 8), 16), Convert.ToInt32(Microsoft.VisualBasic.Right(id, 8), 16))

        Dim filename As String = ""

        If T.Kind = ITTrackKind.ITTrackKindCD Or T.Kind = ITTrackKind.ITTrackKindFile Then
            filename = CType(T, IITFileOrCDTrack).Location
        End If
        If T.Kind = ITTrackKind.ITTrackKindURL Then
            filename = CType(T, IITURLTrack).URL
        End If

        Dim vidFile = File.OpenRead(filename)

        Return New ProgressiveDownload(Request).ResultMessage(vidFile, "audio/m4a")
    End Function
End Class

Public Class ProgressiveDownload
    Public ReadOnly Property IsRangeRequest() As Boolean
        Get
            Return _Request.Headers.Range IsNot Nothing AndAlso _Request.Headers.Range.Ranges.Count > 0
        End Get
    End Property

    Public Function ResultMessage(stream As Stream, mediaType As String) As HttpResponseMessage
        Try
            If IsRangeRequest Then

                Dim content = New ByteRangeStreamContent(stream, _Request.Headers.Range, mediaType)
                Dim response = _Request.CreateResponse(HttpStatusCode.PartialContent)
                response.Content = content

                Return response
            Else
                Dim content = New StreamContent(stream)
                Dim response = _Request.CreateResponse(HttpStatusCode.OK)
                response.Content = content
                response.Content.Headers.ContentType = MediaTypeHeaderValue.Parse(mediaType)

                Return response
            End If

        Catch ibr As InvalidByteRangeException
            Return _Request.CreateErrorResponse(ibr)
        Catch e As Exception
            Return _Request.CreateErrorResponse(HttpStatusCode.BadRequest, e)
        End Try
    End Function

    Public Sub New(request As HttpRequestMessage)
        _Request = request
    End Sub

    Private _Request As HttpRequestMessage
End Class

JS

function Play(sourceUrl) {
        var audio = $("#Lecteur");
        if ($('#SRC').length == 0) {
            audio.append(' <source id="SRC" type="audio/mp4" />');
        }
        $("#SRC").attr("src",'/api/audio/' + sourceUrl);
        /****************/
        audio[0].pause();
        audio[0].load();//suspends and restores all audio element

        //audio[0].play(); changed based on Sprachprofi's comment below
        audio[0].oncanplaythrough = audio[0].play();
        /****************/
    }

当然是HTML

 <audio id="Lecteur" controls="controls">
  <source id="SRC"  type="audio/mp4" />
</audio>

它在FF和IE上工作得很好，当我更改ID文件声音停止和strat immediatlly（文件是complet下载之前），在Chrome上它不太好但不适用于iOS ... :(

将juste流式音频文件传输到HTML播放器的最佳做法是什么... 也许用jquery插件，但女巫？

感谢

ios上的音频流webapi

0 个答案: