C#实现MJPEG服务器

实现流写入，将图像作为mjpeg写入

 public class MjpegWriter : IDisposable
    {

        private static byte[] CRLF = new byte[] { 13, 10 };
        private static byte[] EmptyLine = new byte[] { 13, 10, 13, 10 };

        private string _Boundary;

        public MjpegWriter(Stream stream)
            : this(stream, "--boundary")
        {

        }

        public MjpegWriter(Stream stream, string boundary)
        {

            this.Stream = stream;
            this.Boundary = boundary;
        }

        public string Boundary { get; private set; }
        public Stream Stream { get; private set; }

        public void WriteHeader()
        {

            Write(
                    "HTTP/1.1 200 OK\r\n" +
                    "Content-Type: multipart/x-mixed-replace; boundary=" +
                    this.Boundary +
                    "\r\n"
                 );

            this.Stream.Flush();
        }

        public void Write(Image image)
        {
            MemoryStream ms = BytesOf(image);
            this.Write(ms);
        }

        public void Write(MemoryStream imageStream)
        {

            StringBuilder sb = new StringBuilder();

            sb.AppendLine();
            sb.AppendLine(this.Boundary);
            sb.AppendLine("Content-Type: image/jpeg");
            sb.AppendLine("Content-Length: " + imageStream.Length.ToString());
            sb.AppendLine();

            Write(sb.ToString());
            imageStream.WriteTo(this.Stream);
            Write("\r\n");

            this.Stream.Flush();

        }

        private void Write(byte[] data)
        {
            this.Stream.Write(data, 0, data.Length);
        }

        private void Write(string text)
        {
            byte[] data = BytesOf(text);
            this.Stream.Write(data, 0, data.Length);
        }

        private static byte[] BytesOf(string text)
        {
            return Encoding.ASCII.GetBytes(text);
        }

        private static MemoryStream BytesOf(Image image)
        {
            MemoryStream ms = new MemoryStream();
            image.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg);
            return ms;
        }

        public string ReadRequest(int length)
        {

            byte[] data = new byte[length];
            int count = this.Stream.Read(data, 0, data.Length);

            if (count != 0)
                return Encoding.ASCII.GetString(data, 0, count);

            return null;
        }

        #region IDisposable Members

        public void Dispose()
        {

            try
            {

                if (this.Stream != null)
                    this.Stream.Dispose();

            }
            finally
            {
                this.Stream = null;
            }
        }

        #endregion
    }

服务器实现：

 public class ImageStreamingServer : IDisposable
    {

        private List<Socket> _Clients;
        private Thread _Thread;

        public ImageStreamingServer() : this(IRImg.Snapshots())
        {

        }

        public ImageStreamingServer(IEnumerable<Image> imagesSource)
        {

            _Clients = new List<Socket>();
            _Thread = null;

            this.ImagesSource = imagesSource;
            this.Interval = 111;

        }

        public IEnumerable<Image> ImagesSource { get; set; }

        public int Interval { get; set; }

        public IEnumerable<Socket> Clients { get { return _Clients; } }

        public bool IsRunning { get { return (_Thread != null && _Thread.IsAlive); } }

        public void Start(int port)
        {

            lock (this)
            {
                _Thread = new Thread(new ParameterizedThreadStart(ServerThread));
                _Thread.IsBackground = true;
                _Thread.Start(port);
            }

        }

        public void Start()
        {
            this.Start(8080);
        }

        public void Stop()
        {

            if (this.IsRunning)
            {
                try
                {
                    _Thread.Join();
                    _Thread.Abort();
                }
                finally
                {

                    lock (_Clients)
                    {

                        foreach (var s in _Clients)
                        {
                            try
                            {
                                s.Close();
                            }
                            catch { }
                        }
                        _Clients.Clear();

                    }

                    _Thread = null;
                }
            }
        }

        private void ServerThread(object state)
        {

            try
            {
                Socket Server = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);

                Server.Bind(new IPEndPoint(IPAddress.Any, (int)state));
                Server.Listen(10);

                System.Diagnostics.Debug.WriteLine(string.Format("Server started on port {0}.", state));

                foreach (Socket client in Server.IncommingConnectoins())
                    ThreadPool.QueueUserWorkItem(new WaitCallback(ClientThread), client);

            }
            catch { }

            this.Stop();
        }

        private void ClientThread(object client)
        {

            Socket socket = (Socket)client;
            lock (_Clients)
                _Clients.Add(socket);

            try
            {
                using (MjpegWriter wr = new MjpegWriter(new NetworkStream(socket, true)))
                {
                    wr.WriteHeader();
                    foreach (var imgStream in IRImg.Streams(this.ImagesSource))
                    {
                        if (this.Interval > 0)
                            Thread.Sleep(this.Interval);

                        wr.Write(imgStream);
                    }

                }
            }
            catch { }
            finally
            {
                lock (_Clients)
                    _Clients.Remove(socket);
            }
        }

        public void Dispose()
        {
            this.Stop();
        }
    }

    static class SocketExtensions
    {

        public static IEnumerable<Socket> IncommingConnectoins(this Socket server)
        {
            while (true)
                yield return server.Accept();
        }

    }


    static class IRImg
    {
        public static IEnumerable<Image> Snapshots()
        {
            while (true)
            {
                yield return IRCommon.Instance.GetBitmap();
            }
        }

        internal static IEnumerable<MemoryStream> Streams(this IEnumerable<Image> source)
        {
            MemoryStream ms = new MemoryStream();

            foreach (var img in source)
            {
                ms.SetLength(0);
                img.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg);
                yield return ms;
            }

            ms.Close();
            ms = null;

            yield break;
        }

    }

将上面代码中的这行 IRCommon.Instance.GetBitmap();改为自己的bitmap来源即可实现mjpeg图像传输

浏览器可直接输入 127.0.0.1:8080访问，chrome没问题，但是ie下，会一直下载图片

C#客户端可以用afroge实现浏览，具体可参考：在WPF中使用AForge控件

本项目来源：Motion JPEG Streaming Server   （codeproject）