新增 Mjpegplayer 用来播放 Web 流

SHH.MjpegPlayer/Server/MjpegHttpCmd.cs

@@ -0,0 +1,163 @@
+using Newtonsoft.Json;
+using System.Net.Sockets;
+using System.Text;
+
+namespace SHH.MjpegPlayer
+{
+    /// <summary>
+    /// MJPEG HTTP命令类
+    /// </summary>
+    public class MjpegHttpCmd
+    {
+        #region DoHttpCmd
+
+        public static bool DoHttpCmd(NetworkStream stream,
+            SessionInfo Info, string Cmd)
+        {
+            try
+            {
+                switch (Cmd)
+                {
+                    case "view":
+                        Info.Message = "执行 view 命令.";
+                        DoHttpCmdView(stream, Info);
+                        return true;
+
+                    case "task":
+                        Info.Message = "执行 task 命令.";
+                        DoHttpCmdTask(stream, Info);
+                        return true;
+                }
+
+                return false;
+            }
+            catch (Exception ex)
+            {
+                SendJson(stream, $"Command Failed: {ex.Message}", 400);
+                return true;
+            }
+        }
+
+        #endregion
+
+        #region DoHttpCmdView
+
+        private static void DoHttpCmdView(NetworkStream stream, SessionInfo Info)
+        {
+            var sessions = new List<SessionInfo>();
+            int iSessionCount = 0;
+
+            var allSessions = MjpegStatics.Sessions.GetAllSessionInfos();
+
+            foreach (var sessionInfo in allSessions)
+            {
+                if (sessionInfo == null) continue;
+
+                if (!string.IsNullOrEmpty(Info.DeviceId))
+                {
+                    if (!string.IsNullOrEmpty(sessionInfo.DeviceId)
+                        && !sessionInfo.DeviceId.Equals(Info.DeviceId))
+                        continue;
+                }
+
+                if (!string.IsNullOrEmpty(Info.TypeCode))
+                {
+                    if (!string.IsNullOrEmpty(sessionInfo.TypeCode)
+                        && !sessionInfo.TypeCode.Equals(Info.TypeCode))
+                        continue;
+                }
+
+                iSessionCount++;
+                sessions.Add(sessionInfo);
+            }
+
+            var chns = new List<ImageChannel>();
+            var imgChns = MjpegStatics.ImageChannels;
+            int iImgChanCount = 0;
+
+            foreach (var kvp in imgChns.Channels)
+            {
+                var imgChannel = kvp.Value;
+                if (imgChannel == null) continue;
+
+                if (!string.IsNullOrEmpty(Info.DeviceId))
+                {
+                    if (!imgChannel.DeviceId.ToString().Equals(Info.DeviceId))
+                        continue;
+                }
+
+                if (!string.IsNullOrEmpty(Info.TypeCode))
+                {
+                    if (!imgChannel.Type.Equals(Info.TypeCode))
+                        continue;
+                }
+
+                iImgChanCount++;
+                chns.Add(imgChannel);
+            }
+
+            var result = new
+            {
+                webAccessCount = iSessionCount,
+                deviceChannelCount = iImgChanCount,
+                webAccessItems = sessions,
+                deviceChannels = chns
+            };
+
+            SendJson(stream, JsonConvert.SerializeObject(result, Formatting.Indented));
+        }
+
+        #endregion
+
+        #region DoHttpCmdTask
+
+        private static void DoHttpCmdTask(NetworkStream stream, SessionInfo Info)
+        {
+            // [Optimized]: 直接从 TaskManager 获取实时任务快照，避免遍历旧的静态字典
+            var activeTasks = TaskManager.RunningTasks.Values.ToList();
+
+            int iTaskCount = activeTasks.Count;
+            int iMjpegServerListenCount = activeTasks.Count(t => t.Name.Contains("MjpegServer-"));
+
+            var result = new
+            {
+                taskCount = iTaskCount,
+                portListenCount = iMjpegServerListenCount,
+                // 映射为前端需要的格式
+                taskItems = activeTasks.Select(t => new { t.Name, t.Type })
+            };
+
+            // 使用 Newtonsoft.Json 或 System.Text.Json 输出
+            SendJson(stream, JsonConvert.SerializeObject(result, Formatting.Indented));
+        }
+
+        #endregion
+
+        #region Helper
+
+        private static void SendJson(NetworkStream stream, string json, int code = 200)
+        {
+            try
+            {
+                string statusLine = code == 200 ? "200 OK" : "400 Bad Request";
+
+                // [修复] 添加 CORS 头，允许诊断页面跨域访问
+                byte[] response = Encoding.UTF8.GetBytes(
+                    $"HTTP/1.1 {statusLine}\r\n" +
+                    "Access-Control-Allow-Origin: *\r\n" +
+                    "Access-Control-Allow-Methods: GET, POST\r\n" +
+                    "Content-Type: application/json; charset=utf-8\r\n" +
+                    $"Content-Length: {Encoding.UTF8.GetByteCount(json)}\r\n\r\n" +
+                    json
+                );
+
+                stream.Write(response, 0, response.Length);
+                stream.Flush();
+                stream.Close();
+            }
+            catch { }
+        }
+
+        #endregion
+    }
+}