Question

如何阅读.mp3音频文件？我写了下面的代码。

public static byte[] ReadFully(Stream stream)
        {
            byte[] buffer = new byte[32768];
            using (MemoryStream ms = new MemoryStream())
            {
                while (true)
                {
                    int read = stream.Read(buffer, 0, buffer.Length);
                    if (read <= 0)
                        return ms.ToArray();
                    ms.Write(buffer, 0, read);
                }
            }

它接受.3gp，.caf foramat流。为什么它不接受.mp3文件？ }

Answer 1

我使用以下代码从我的REST WCF服务下载mp3文件：

        [WebGet]
        public Stream GetMp3()
        {
            byte[] buffer;
            WebOperationContext.Current.OutgoingResponse.ContentType = "audio/mp3";            
            using (FileStream ms = new FileStream(@"C:\Sample.mp3", FileMode.Open))
            {
                int length = (int)ms.Length;
                WebOperationContext.Current.OutgoingResponse.ContentLength = length;
                buffer = new byte[length];
                int sum = 0;
                int count;
                while ((count = ms.Read(buffer, sum, length - sum)) > 0)
                {
                    sum += count;
                }
                ms.Close();
            }
            return new MemoryStream(buffer);
        }

更新：将mp3文件上传到Restful WCF服务

服务器端方法：

        [WebInvoke]
        public string RecieveMp3(Stream mp3Stream)
        {
            byte[] buffer = new byte[5000000];
            using (FileStream ms = new FileStream("C:\\Temp\\Test1.mp3", FileMode.OpenOrCreate))
            {                
                int read = mp3Stream.Read(buffer, 0, buffer.Length);
                ms.Write(buffer, 0, read);                
            }
            return "Recieved Mp3 file";
        }

注意： 1.确保您对该文件夹具有权限，以便为与运行wcf服务的应用程序池关联的用户编写mp3文件 2.出于测试目的，我已将字节数组大小硬编码为较大的值。

客户致电服务：

        private string UseRestSharpApproachForFiles(string serviceBaseUrl, string resourceUrl, Method method, string filepath)
        {
            var client = new RestClient();
            client.BaseUrl = serviceBaseUrl;            
            var request = new RestRequest(method) { DateFormat = DataFormat.Xml.ToString(), Resource = resourceUrl };
            request.AddFile("stream", filepath);
            var response = client.Execute(request);
            string responseString;
            if (response.StatusCode == HttpStatusCode.OK)
            {
                responseString = HttpUtility.HtmlDecode(response.Content);
            }
            else
            {
                responseString = response.StatusDescription + " --------------------" + HttpUtility.HtmlDecode(response.Content);
            }
            return responseString;
        }

使用第三方dll调用名为RestSharp的休息服务。

如何在wcf中读取.mp3文件？

1 个答案: