相思资源网

ASP.NET MVC4异步聊天室的示例代码
站长资源 2024/11/15 佚名
23 1538
相思资源网 Design By www.200059.com

本文介绍了ASP.NET MVC4异步聊天室的示例代码，分享给大家，具体如下：

类图:

ASP.NET MVC4异步聊天室的示例代码

Domain层

IChatRoom.cs

using System;
using System.Collections.Generic;

namespace MvcAsyncChat.Domain
{
  public interface IChatRoom
  {
    void AddMessage(string message);
    void AddParticipant(string name);
    void GetMessages(
      DateTime since, 
      Action<IEnumerable<string>, DateTime> callback);
    void RemoveParticipant(string name);
  }
}

IMessageRepo.cs

using System;
using System.Collections.Generic;

namespace MvcAsyncChat.Domain
{
  public interface IMessageRepo
  {
    DateTime Add(string message);
    IEnumerable<string> GetSince(DateTime since);
  }
}

ICallbackQueue.cs

using System;
using System.Collections.Generic;

namespace MvcAsyncChat.Domain
{
  public interface ICallbackQueue
  {
    void Enqueue(Action<IEnumerable<string>, DateTime> callback);
    IEnumerable<Action<IEnumerable<string>, DateTime DequeueAll();
    IEnumerable<Action<IEnumerable<string>, DateTime DequeueExpired(DateTime expiry);
  }
}

ChatRoom.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading;
using MvcAsyncChat.Svcs;

namespace MvcAsyncChat.Domain
{
  public class ChatRoom : IChatRoom
  {
    readonly ICallbackQueue callbackQueue;
    readonly IDateTimeSvc dateTimeSvc;
    readonly IMessageRepo messageRepo;

    public ChatRoom(
      ICallbackQueue callbackQueue,
      IDateTimeSvc dateTimeSvc,
      IMessageRepo messageRepo)
    {
      this.callbackQueue = callbackQueue;
      this.dateTimeSvc = dateTimeSvc;
      this.messageRepo = messageRepo;
    }

    public void AddMessage(string message)
    {
      var timestamp = messageRepo.Add(message);

      foreach (var callback in callbackQueue.DequeueAll())
        callback(new[] { message }, timestamp);
    }

    public void AddParticipant(string name)
    {
      AddMessage(string.Format("{0} 已进入房间.", name));
    }

    public void GetMessages(
      DateTime since,
      Action<IEnumerable<string>, DateTime> callback)
    {
      var messages = messageRepo.GetSince(since);

      if (messages.Count() > 0)
        callback(messages, since);
      else
        callbackQueue.Enqueue(callback);
    }

    public void RemoveParticipant(string name)
    {
      AddMessage(string.Format("{0} left the room.", name));
    }
  }
}

InMemMessageRepo.cs

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

namespace MvcAsyncChat.Domain
{
  public class InMemMessageRepo : IMessageRepo
  {
    public InMemMessageRepo()
    {
      Messages = new List<Tuple<string, DateTime();
    }

    public IList<Tuple<string, DateTime Messages { get; private set; }

    public DateTime Add(string message)
    {
      var timestamp = DateTime.UtcNow;

      Messages.Add(new Tuple<string, DateTime>(message, timestamp));

      return timestamp;
    }

    public IEnumerable<string> GetSince(DateTime since)
    {
      return Messages
        .Where(x => x.Item2 > since)
        .Select(x => x.Item1);
    }
  }
}

CallbackQueue.cs

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

namespace MvcAsyncChat.Domain
{
  public class CallbackQueue : ICallbackQueue
  {
    public CallbackQueue()
    {
      Callbacks = new Queue<Tuple<Action<IEnumerable<string>, DateTime>, DateTime();
    }

    public Queue<Tuple<Action<IEnumerable<string>, DateTime>, DateTime Callbacks { get; private set; }

    public void Enqueue(Action<IEnumerable<string>, DateTime> callback)
    {
      Callbacks.Enqueue(new Tuple<Action<IEnumerable<string>, DateTime>, DateTime>(callback, DateTime.UtcNow));
    }

    public IEnumerable<Action<IEnumerable<string>, DateTime DequeueAll()
    {
      while (Callbacks.Count > 0)
        yield return Callbacks.Dequeue().Item1;
    }

    public IEnumerable<Action<IEnumerable<string>, DateTime DequeueExpired(DateTime expiry)
    {
      if (Callbacks.Count == 0)
        yield break;

      var oldest = Callbacks.Peek();
      while (Callbacks.Count > 0 && oldest.Item2 <= expiry)
      {
        yield return Callbacks.Dequeue().Item1;

        if (Callbacks.Count > 0)
          oldest = Callbacks.Peek();
      }
    }
  }
}

RequestModels文件夹实体类

EnterRequest.cs

using System;
using System.ComponentModel;
using System.ComponentModel.DataAnnotations;

namespace MvcAsyncChat.RequestModels
{
  public class EnterRequest
  {
    [DisplayName("名称")]
    [Required, StringLength(16), RegularExpression(@"^[A-Za-z0-9_\ -]+$", ErrorMessage="A name must be alpha-numeric.")]
    public string Name { get; set; }
  }
}

GetMessagesRequest.cs

using System;

namespace MvcAsyncChat.RequestModels
{
  public class GetMessagesRequest
  {
    public string since { get; set; }
  }
}

SayRequest.cs

using System;
using System.ComponentModel;
using System.ComponentModel.DataAnnotations;

namespace MvcAsyncChat.RequestModels
{
  public class SayRequest
  {
    [Required, StringLength(1024), DataType(DataType.MultilineText)]
    public string Text { get; set; }
  }
}

ResponseModels文件夹实体类

GetMessagesResponse.cs

using System;
using System.Collections.Generic;

namespace MvcAsyncChat.ResponseModels
{
  public class GetMessagesResponse
  {
    public string error { get; set; }
    public IEnumerable<string> messages { get; set; }
    public string since { get; set; }
  }
}

SayResponse.cs

using System;

namespace MvcAsyncChat.ResponseModels
{
  public class SayResponse
  {
    public string error { get; set; }
  }
}

ChatController.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using System.Web.Mvc.Async;
using MvcAsyncChat.Domain;
using MvcAsyncChat.RequestModels;
using MvcAsyncChat.ResponseModels;
using MvcAsyncChat.Svcs;

namespace MvcAsyncChat.Controllers
{
  public class ChatController : AsyncController
  {
    readonly IAuthSvc authSvc;
    readonly IChatRoom chatRoom;
    readonly IDateTimeSvc dateTimeSvc;

    public ChatController(
      IAuthSvc authSvc,
      IChatRoom chatRoom,
      IDateTimeSvc dateTimeSvc)
    {
      this.authSvc = authSvc;
      this.chatRoom = chatRoom;
      this.dateTimeSvc = dateTimeSvc;
    }

    [ActionName("enter"), HttpGet]
    public ActionResult ShowEnterForm()
    {
      if (User.Identity.IsAuthenticated)
        return RedirectToRoute(RouteName.Room);

      return View();
    }

    [ActionName("enter"), HttpPost]
    public ActionResult EnterRoom(EnterRequest enterRequest)
    {
      if (!ModelState.IsValid)
        return View(enterRequest);

      authSvc.Authenticate(enterRequest.Name);
      chatRoom.AddParticipant(enterRequest.Name);

      return RedirectToRoute(RouteName.Room);
    }

    [ActionName("room"), HttpGet, Authorize]
    public ActionResult ShowRoom()
    {
      return View();
    }

    [ActionName("leave"), HttpGet, Authorize]
    public ActionResult LeaveRoom()
    {
      authSvc.Unauthenticate();
      chatRoom.RemoveParticipant(User.Identity.Name);

      return RedirectToRoute(RouteName.Enter);
    }

    [HttpPost, Authorize]
    public ActionResult Say(SayRequest sayRequest)
    {
      if (!ModelState.IsValid)
        return Json(new SayResponse() { error = "该请求无效." });

      chatRoom.AddMessage(User.Identity.Name+" 说:"+sayRequest.Text);

      return Json(new SayResponse());
    }

    [ActionName("messages"), HttpPost, Authorize]
    public void GetMessagesAsync(GetMessagesRequest getMessagesRequest)
    {
      AsyncManager.OutstandingOperations.Increment();

      if (!ModelState.IsValid)
      {
        AsyncManager.Parameters["error"] = "The messages request was invalid.";
        AsyncManager.Parameters["since"] = null;
        AsyncManager.Parameters["messages"] = null;
        AsyncManager.OutstandingOperations.Decrement();
        return;
      }

      var since = dateTimeSvc.GetCurrentDateTimeAsUtc();
      if (!string.IsNullOrEmpty(getMessagesRequest.since))
        since = DateTime.Parse(getMessagesRequest.since).ToUniversalTime();

      chatRoom.GetMessages(since, (newMessages, timestamp) => 
      {
        AsyncManager.Parameters["error"] = null;
        AsyncManager.Parameters["since"] = timestamp;
        AsyncManager.Parameters["messages"] = newMessages;
        AsyncManager.OutstandingOperations.Decrement();
      });
    }

    public ActionResult GetMessagesCompleted(
      string error, 
      DateTime"o");
      data.messages = messages;

      return Json(data);
    }
  }
}

room.js

var since = "",
  errorCount = 0,
  MAX_ERRORS = 6;

function addMessage(message, type) {
  $("#messagesSection > td").append("<div class='" + (type || "") + "'>" + message + "</div>")
}

function showError(error) {
  addMessage(error.toString(), "error");
}

function onSayFailed(XMLHttpRequest, textStatus, errorThrown) {
  showError("An unanticipated error occured during the say request: " + textStatus + "; " + errorThrown);
}

function onSay(data) {
  if (data.error) {
    showError("An error occurred while trying to say your message: " + data.error);
    return;
  }
}

function setSayHandler() {
  $("#Text").keypress(function (e) {
    if (e.keyCode == 13) {
      $("#sayForm").submit();
      $("#Text").val("");
      return false;
    }
  });
}

function retryGetMessages() {
  if (++errorCount > MAX_ERRORS) {
    showError("There have been too many errors. Please leave the chat room and re-enter.");
  }
  else {
    setTimeout(function () {
      getMessages();
    }, Math.pow(2, errorCount) * 1000);
  }
}

function onMessagesFailed(XMLHttpRequest, textStatus, errorThrown) {
  showError("An unanticipated error occured during the messages request: " + textStatus + "; " + errorThrown);
  retryGetMessages();
}

function onMessages(data, textStatus, XMLHttpRequest) {
  if (data.error) {
    showError("An error occurred while trying to get messages: " + data.error);
    retryGetMessages();
    return;
  }

  errorCount = 0;
  since = data.since;

  for (var n = 0; n < data.messages.length; n++)
    addMessage(data.messages[n]);

  setTimeout(function () {
    getMessages();
  }, 0);
}

function getMessages() {
  $.ajax({
    cache: false,
    type: "POST",
    dataType: "json",
    url: "/messages",
    data: { since: since },
    error: onMessagesFailed,
    success: onMessages,
    timeout: 100000
  });
}

Chat视图文件夹

Enter.cshtml

@model MvcAsyncChat.RequestModels.EnterRequest

@{
  View.Title = "Enter";
  Layout = "~/Views/Shared/_Layout.cshtml";
}

@section Head {}

<tr id="enterSection">
  <td>
    <h2>[MVC聊天]是使用ASP.NET MVC 3的异步聊天室
    <table>
      <tr>
        <td class="form-container">
          <fieldset>
            <legend>进入聊天室</legend>
            @using(Html.BeginForm()) {
              @Html.EditorForModel()
              <input type="submit" value="Enter" />
            }
          </fieldset>
        </td>
      </tr>
    </table>
  </td>
</tr>

@section PostScript {
  <script>
    $(document).ready(function() {
      $("#Name").focus();  
    });
  </script>
}

Room.cshtml

@using MvcAsyncChat;
@using MvcAsyncChat.RequestModels;
@model SayRequest

@{
  View.Title = "Room";
  Layout = "~/Views/Shared/_Layout.cshtml";
}

@section Head {
  <script src="/UploadFiles/2021-04-02/@Url.Content(">


运行结果如图:


ASP.NET MVC4异步聊天室的示例代码


ASP.NET MVC4异步聊天室的示例代码


以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。
标签：
ASP.NET,MVC4异步聊天室,ASP.NET,MVC4异步聊天
相思资源网 Design By www.200059.com
广告合作：本站广告合作请联系QQ：858582 申请时备注：广告合作（否则不回）
免责声明：本站文章均来自网站采集或用户投稿，网站不提供任何软件下载或自行开发的软件！ 如有用户或公司发现本站内容信息存在侵权行为，请邮件告知！ 858582#qq.com
相思资源网 Design By www.200059.com

评论“ASP.NET MVC4异步聊天室的示例代码”

暂无ASP.NET MVC4异步聊天室的示例代码的评论...
www.200059.com 相思资源网
139,976影音资源
144,792福利资源
21,817软件资源
631,128技术资源

友情链接

杰晶网络 DDR爱好者之家 桃源资源网 杰网资源 富贵资源网 南强小屋 铁雪资源网 幽灵资源网 万梅资源网 狼山资源网 白云岛资源网 昆仑资源网 相思资源网 明霞山资源网 内蒙古资源网 黑松山资源网 茶园资源网 饿虎岗资源网 大旗谷资源网 常春岛资源网 岱庙资源网 兴国资源网 快活林资源网 蝙蝠岛资源网 帝王谷资源网 白云城资源网 伏龙阁资源网 清风细雨楼 天枫庄资源网 圆月山庄资源网 无争山庄资源网 神水资源网 移花宫资源网 神剑山庄资源网 无为清净楼资源网 金钱帮资源网 丐帮资源网 华山资源网 极乐门资源网 小李飞刀资源网 凤求凰客栈 风云阁资源网 金狮镖局 鸳鸯亭资源网 千金楼资源网 更多链接
相思资源网 Design By www.200059.com