仿微信 即时聊天工具 - SignalR （一）

话不多说，先上图

 

 

 

 

背景：

微信聊天，经常会遇见视频发不了，嗯，还有聊天不方便的问题，于是我就自己买了服务器，部署了一套可以直接在微信打开的网页进行聊天，这样只需要发送个url给朋友，就能聊天了！

由于自己无聊弄着玩的，代码比较粗糙，各位多指正！

1、首先安装SignalR，这步我就不做过多说明了

安装好以后在根目录新建一个Hubs文件夹，做用户的注册和通知

MessageHub.cs 文件

using Microsoft.AspNet.SignalR;
using Microsoft.AspNet.SignalR.Hubs;
using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
using System.Web;

namespace SignalR.Hubs
{
    [HubName("MessageHub")]
    public class MessageHub : Hub
        {
            private readonly ChatTicker ticker;
            public MessageHub()
            {
                ticker = ChatTicker.Instance;
            }

            public void register(string username, string group = "default")
            {
                var list = (List)HttpRuntime.Cache.Get("msg_hs");
                if (list == null)
                {
                    list = new List();
                }
               

                if (list.Any(x => x.connectionId == Context.ConnectionId))
                {
                    Clients.Client(Context.ConnectionId).broadcastMessage("已经注册，无需再次注册");
                }
            else if (list.Any(x => x.name == username))
            {
                var model = list.Where(x => x.name == username && x.group == group).FirstOrDefault();
                if (model != null)
                {
                    //注册到全局  
                    ticker.GlobalContext.Groups.Add(Context.ConnectionId, group);
                    Clients.Client(model.connectionId).exit();
                    ticker.GlobalContext.Groups.Remove(model.connectionId, group);
                    list.Remove(model);
                    model.connectionId = Context.ConnectionId;
                    list.Add(model);
                    Clients.Group(group).removeUserList(model.connectionId);
                    Thread.Sleep(200);
                    var gourpList = list.Where(x => x.group == group).ToList();
                    Clients.Group(group).appendUserList(Context.ConnectionId, gourpList);
                    HttpRuntime.Cache.Insert("msg_hs", list);
                    // Clients.Client(model.connectionId).broadcastMessage("名称重复，只能注册一个");
                }
                //Clients.Client(Context.ConnectionId).broadcastMessage("名称重复，只能注册一个");
            }
            else
                {
                    list.Add(new SiginalRModel() { name = username, group = group, connectionId = Context.ConnectionId });

                    //注册到全局  
                    ticker.GlobalContext.Groups.Add(Context.ConnectionId, group);
                    Thread.Sleep(200);

                    var gourpList = list.Where(x => x.group == group).ToList();
                    Clients.Group(group).appendUserList(Context.ConnectionId, gourpList);
                    HttpRuntime.Cache.Insert("msg_hs", list);
                }

            }

            public void Say(string msg)
            {
                var list = (List)HttpRuntime.Cache.Get("msg_hs");
                if (list == null)
                {
                    list = new List();
                }
                var userModel = list.Where(x => x.connectionId == Context.ConnectionId).FirstOrDefault();
                if (userModel != null )
                {
                    Clients.Group(userModel.group).Say(userModel.name, msg);
                }
            }

        public void Exit()
        {
            OnDisconnected(true);
        }

        public override Task OnDisconnected(bool s)
                {
                    var list = (List)HttpRuntime.Cache.Get("msg_hs");
                    if (list == null)
                    {
                        list = new List();
                    }
                    var closeModel = list.Where(x => x.connectionId == Context.ConnectionId).FirstOrDefault();

                    if (closeModel != null)
                    {
                        list.Remove(closeModel);

                        Clients.Group(closeModel.group).removeUserList(Context.ConnectionId);

                     }
                    HttpRuntime.Cache.Insert("msg_hs", list);
                
                    return base.OnDisconnected(s);
                }
            }
        

    public class ChatTicker
        {
            #region 实现一个单例

            private static readonly ChatTicker _instance =
                new ChatTicker(GlobalHost.ConnectionManager.GetHubContext());

            private readonly IHubContext m_context;

            private ChatTicker(IHubContext context)
            {

                m_context = context;
                //这里不能直接调用Sender，因为Sender是一个不退出的“死循环”，否则这个构造函数将不会退出。  
                //其他的流程也将不会再执行下去了。所以要采用异步的方式。  
                //Task.Run(() => Sender());
            }

            public IHubContext GlobalContext
            {
                get { return m_context; }
            }

            public static ChatTicker Instance
            {
                get { return _instance; }
            }

            #endregion
        }

    public class SiginalRModel {
        public string connectionId { get; set; }

        public string group { get; set; }
        public string name { get; set; }
    }
}

我把类和方法都写到一块了，大家最好是分开！

 

接下来是控制器

HomeController.cs

using Microsoft.AspNet.SignalR;
using Microsoft.AspNet.SignalR.Client;
using SignalR.Hubs;
using SignalR.ViewModels;
using System;
using System.Collections;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using Newtonsoft.Json;
using System.Diagnostics;
using System.Text.RegularExpressions;

namespace SignalR.Controllers
{
    public class HomeController : Controller
    {
        public ActionResult Index()
        {
    
            return View();
        }


        public ActionResult GetV(string v)
        {
            if (!string.IsNullOrEmpty(v))
            {
                string url = RedisHelper.Get(v)?.ToString();
                if (!string.IsNullOrEmpty(url))
                {
                    return Json(new { isOk = true, m = url }, JsonRequestBehavior.AllowGet);
                }
                return Json(new { isOk = false}, JsonRequestBehavior.AllowGet);
            }
            return Json(new { isOk = false }, JsonRequestBehavior.AllowGet);
        }

        public ActionResult getkey(string url)
        {
            if (!string.IsNullOrEmpty(url))
            {
                var s = "v" + Util.GetRandomLetterAndNumberString(new Random(), 5).ToLower();
                var dt = Convert.ToDateTime(DateTime.Now.AddDays(1).ToString("yyyy-MM-dd 04:00:00"));
                int min = Convert.ToInt16((dt - DateTime.Now).TotalMinutes);
                RedisHelper.Set(s, url, min);
                return Json(new { isOk = true, m = s }, JsonRequestBehavior.AllowGet);
            }
            return Json(new { isOk = false }, JsonRequestBehavior.AllowGet);
        }

        public ActionResult upfile()
        {
            try
            {
                if (Request.Files.Count > 0)
                {
                    var file = Request.Files[0];
                    if (file != null)
                    {
                        var imgList = new List() { ".gif", ".jpg", ".bmp", ".png" };
                        var videoList = new List() { ".mp4" };
                        FileModel fmodel = new FileModel();

                        string name = Guid.NewGuid().ToString();
                        string fileExt = Path.GetExtension(file.FileName).ToLower();//上传文件扩展名
                        string path = Server.MapPath("~/files/") + name + fileExt;
                        file.SaveAs(path);

                        string extension = new FileInfo(path).Extension;

                        if (extension == ".mp4")
                        {
                            fmodel.t = 2;
                        }
                        else if (imgList.Contains(extension))
                        {
                            fmodel.t = 1;
                        }
                        else
                        {
                            fmodel.t = 0;
                        }
                        string url = Guid.NewGuid().ToString();
                        fmodel.url = "http://" + Request.Url.Host;
                        if (Request.Url.Port != 80)
                        {
                            fmodel.url += ":" + Request.Url.Port;
                        }
                        fmodel.url += "/files/" + name + fileExt;
                        GetImageThumb(Server.MapPath("~") + "files\\" + name + fileExt, name);
                        return Json(new { isOk = true, m = "file:" + JsonConvert.SerializeObject(fmodel) }, JsonRequestBehavior.AllowGet);
                    }
                }
            }
            catch(Exception ex)
            {
                Log.Info(ex);
            }
           
           
            return Content("");
        }

        public string GetImageThumb(string localVideo,string name)
        {
            string path = AppDomain.CurrentDomain.BaseDirectory;
            string ffmpegPath = path + "/ffmpeg.exe";
            string oriVideoPath = localVideo;
            int frameIndex = 5;
            int _thubWidth;
            int _thubHeight;
            GetMovWidthAndHeight(localVideo, out _thubWidth, out _thubHeight);
            int thubWidth = 200;
            int thubHeight = _thubWidth == 0 ? 200 : (thubWidth * _thubHeight / _thubWidth );  
            
            string thubImagePath = path +  "files\\" + name + ".jpg";
            string command = string.Format("\"{0}\" -i \"{1}\" -ss {2} -vframes 1 -r 1 -ac 1 -ab 2 -s {3}*{4} -f image2 \"{5}\"", ffmpegPath, oriVideoPath, frameIndex, thubWidth, thubHeight, thubImagePath);
            Cmd.RunCmd(command);
            return name;
        }

        /// 

        /// 获取视频的帧宽度和帧高度
        /// 
        /// mov文件的路径
        /// null表示获取宽度或高度失败
        public static void GetMovWidthAndHeight(string videoFilePath, out int width, out int height)
        {
            try
            {

                //执行命令获取该文件的一些信息 
                string ffmpegPath = AppDomain.CurrentDomain.BaseDirectory +  "/ffmpeg.exe";
                string output;
                string error;
                ExecuteCommand("\"" + ffmpegPath + "\"" + " -i " + "\"" + videoFilePath + "\"", out output, out error);
                if (string.IsNullOrEmpty(error))
                {
                    width = 0;
                    height = 0;
                }

                //通过正则表达式获取信息里面的宽度信息
                Regex regex = new Regex("(\\d{2,4})x(\\d{2,4})", RegexOptions.Compiled);
                Match m = regex.Match(error);
                if (m.Success)
                {
                    width = int.Parse(m.Groups[1].Value);
                    height = int.Parse(m.Groups[2].Value);
                }
                else
                {
                    width = 0;
                    height = 0;
                }
            }
            catch (Exception)
            {
                width = 0;
                height = 0;
            }
        }

        public static void ExecuteCommand(string command, out string output, out string error)
        {
            try
            {
                //创建一个进程
                Process pc = new Process();
                pc.StartInfo.FileName = command;
                pc.StartInfo.UseShellExecute = false;
                pc.StartInfo.RedirectStandardOutput = true;
                pc.StartInfo.RedirectStandardError = true;
                pc.StartInfo.CreateNoWindow = true;

                //启动进程
                pc.Start();

                //准备读出输出流和错误流
                string outputData = string.Empty;
                string errorData = string.Empty;
                pc.BeginOutputReadLine();
                pc.BeginErrorReadLine();

                pc.OutputDataReceived += (ss, ee) =>
                {
                    outputData += ee.Data;
                };

                pc.ErrorDataReceived += (ss, ee) =>
                {
                    errorData += ee.Data;
                };

                //等待退出
                pc.WaitForExit();

                //关闭进程
                pc.Close();

                //返回流结果
                output = outputData;
                error = errorData;
            }
            catch (Exception)
            {
                output = null;
                error = null;
            }
        }

    }

    public class Util
    {
        public static string GetRandomLetterAndNumberString(Random random, int length)
        {
            if (length < 0)
            {
                throw new ArgumentOutOfRangeException("length");
            }
            char[] pattern = new char[] { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
        'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P',
        'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z' };
            string result = "";
            int n = pattern.Length;
            for (int i = 0; i < length; i++)
            {
                int rnd = random.Next(0, n);
                result += pattern[rnd];
            }
            return result;
        }
    }

    class Cmd
    {
        private static string CmdPath = @"C:\Windows\System32\cmd.exe";
        /// 

        /// 执行cmd命令 返回cmd窗口显示的信息
        /// 多命令请使用批处理命令连接符：
        /// 
        /// 
        /// 执行的命令
        public static string RunCmd(string cmd)
        {
            cmd = cmd.Trim().TrimEnd('&') + "&exit";//说明：不管命令是否成功均执行exit命令，否则当调用ReadToEnd()方法时，会处于假死状态
            using (Process p = new Process())
            {
                p.StartInfo.FileName = CmdPath;
                p.StartInfo.UseShellExecute = false;        //是否使用操作系统shell启动
                p.StartInfo.RedirectStandardInput = true;   //接受来自调用程序的输入信息
                p.StartInfo.RedirectStandardOutput = true;  //由调用程序获取输出信息
                p.StartInfo.RedirectStandardError = true;   //重定向标准错误输出
                p.StartInfo.CreateNoWindow = true;          //不显示程序窗口
                p.Start();//启动程序

                //向cmd窗口写入命令
                p.StandardInput.WriteLine(cmd);
                p.StandardInput.AutoFlush = true;

                //获取cmd窗口的输出信息
                string output = p.StandardOutput.ReadToEnd();
                p.WaitForExit();//等待程序执行完退出进程
                p.Close();

                return output;
            }
        }
    }
}

我还是都写到一块了，大家记得分开！

SController.cs  这个是针对手机端单独拎出来的，里面不需要什么内容

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;

namespace SignalR.Controllers
{
    public class SController : Controller
    {
        // GET: S
        public ActionResult Index()
        {
            return View();
        }
    }
}

　根目录新建一个ViewModels文件夹，里面新建FileModel.cs文件

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;

namespace SignalR.ViewModels
{
    public class FileModel
    {
        /// 

        /// 1 : 图片  2：视频
        /// 
        public int t { get; set; }

        public string url { get; set; }
    }
}　

RedisHelper.cs

using Microsoft.AspNet.SignalR.Messaging;
using StackExchange.Redis;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net;
using System.Runtime.Serialization.Formatters.Binary;
using System.Threading.Tasks;
using System.Web;

namespace SignalR
{
    public class RedisHelper
    {
        private static string Constr = "xxxx.cn:6379";

        private static object _locker = new Object();
        private static ConnectionMultiplexer _instance = null;

        /// 

        /// 使用一个静态属性来返回已连接的实例，如下列中所示。这样，一旦 ConnectionMultiplexer 断开连接，便可以初始化新的连接实例。
        /// 
        public static ConnectionMultiplexer Instance
        {
            get
            {
                if (Constr.Length == 0)
                {
                    throw new Exception("连接字符串未设置！");
                }
                if (_instance == null)
                {
                    lock (_locker)
                    {
                        if (_instance == null || !_instance.IsConnected)
                        {
                            _instance = ConnectionMultiplexer.Connect(Constr);
                        }
                    }
                }
                //注册如下事件
                _instance.ConnectionFailed += MuxerConnectionFailed;
                _instance.ConnectionRestored += MuxerConnectionRestored;
                _instance.ErrorMessage += MuxerErrorMessage;
                _instance.ConfigurationChanged += MuxerConfigurationChanged;
                _instance.HashSlotMoved += MuxerHashSlotMoved;
                _instance.InternalError += MuxerInternalError;
                return _instance;
            }
        }

        static RedisHelper()
        {
        }


        /// 

        /// 
        /// 
        /// 
        public static IDatabase GetDatabase()
        {
            return Instance.GetDatabase();
        }

        /// 

        /// 这里的 MergeKey 用来拼接 Key 的前缀，具体不同的业务模块使用不同的前缀。
        /// 
        /// 
        /// 
        private static string MergeKey(string key)
        {
            return "SignalR:"+ key;
            //return BaseSystemInfo.SystemCode + key;
        }

        /// 

        /// 根据key获取缓存对象
        /// 
        /// 
        /// 
        /// 
        public static T Get(string key)
        {
            key = MergeKey(key);
            return Deserialize(GetDatabase().StringGet(key));
        }

        /// 

        /// 根据key获取缓存对象
        /// 
        /// 
        /// 
        public static object Get(string key)
        {
            key = MergeKey(key);
            return Deserialize