13

我正在使用带有 Signalr 1.0.0 包的 VS2012“Fall”更新。调用服务器端函数工作正常。但是不调用客户端函数。onBroadcastMessage()当（见下文）被调用时，似乎什么也没发生。

问题：

  • 我错过了什么？
  • 有没有办法调试客户端调用？

谢谢！

服务器代码：

using Microsoft.AspNet.SignalR;

namespace KPMain
{
    public class RealtimeConnectionHub : Hub
    {
        public void BroadcastMessage(string name, string message) {
            Clients.All.onBroadcastMessage(name, message);
        }
    }
}

路线登记：

public class RouteConfig
{
    public static void RegisterRoutes(RouteCollection routes) {
        HubConfiguration hubConfig = new HubConfiguration();
#if DEBUG
        hubConfig.EnableDetailedErrors = true;
#endif
        routes.MapHubs(hubConfig);

        ...
    }
}

客户端代码（简化）：

var rtcom = new RealtimeConnection();
rtcom.init({debug: true}, function () {
    rtcom.subscribe(function (sender, message) {
        if (message) {
            alert("message");
        }
    });
});

RealtimeConnection: function () {    
    var
        _rtHub = $.connection.realtimeConnectionHub,
        _initialized = false,                
        _init = function (options, cb) {
            options = options || {};

            $.connection.hub.logging = options.debug;
            $.connection.hub.start().done(function () {
                _initialized = true;

                if (cb) { cb(); }
            });
        },

        _broadcast = function (message) {
            if (_initialized) {
                _rtHub.server.broadcastMessage("testuser", message);
            }
        },

        _subscribe = function (cb) {
            if (_initialized) {
                _rtHub.client.onBroadcastMessage = cb;
            }
        };

    return {
        initialized: _initialized,
        broadcast: _broadcast,
        subscribe: _subscribe,
        init: _init
    };
}

$("#container").on("click", "button.chat-btnSendMessage", function () {
    rtcom.broadcast($(this).parent().find("input").val());
});

日志（使用铬）：

[16:58:01 GMT+0100 (W. Europe Standard Time)] SignalR: Negotiating with '/signalr/negotiate'. jquery.signalR-1.0.0.js:54
[16:58:02 GMT+0100 (W. Europe Standard Time)] SignalR: Attempting to connect to SSE endpoint 'http://w2008r2portal/signalr/connect?transport=serverSentEvents&connectionT…EgDDEU0WLhHVzI7ZUnA0impltR7HYNTGHUJJYAXew1Leg2&connectionData=%5B%5D&tid=0' jquery.signalR-1.0.0.js:54
[16:58:03 GMT+0100 (W. Europe Standard Time)] SignalR: EventSource connected jquery.signalR-1.0.0.js:54
[16:58:03 GMT+0100 (W. Europe Standard Time)] SignalR: Now monitoring keep alive with a warning timeout of 13333.333333333332 and a connection lost timeout of 20000 


Request URL:http://xxx/signalr/send?transport=serverSentEvents&connectionToken=lnTczBgQB0dj...
Request Method:POST
Status Code:200 OK

Request Headers
Accept:application/json, text/javascript, */*; q=0.01
Accept-Charset:ISO-8859-1,utf-8;q=0.7,*;q=0.3
Accept-Encoding:gzip,deflate,sdch
Accept-Language:en-US,en;q=0.8
Authorization:Negotiate YIIFXQYGKwYBBQUCoIIFUTCCBU2...
Connection:keep-alive
Content-Length:148
Content-Type:application/x-www-form-urlencoded; charset=UTF-8
Host:w2008r2portal
Origin:http://w2008r2portal
Referer:http://w2008r2portal/?tab=Start
User-Agent:Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.17 (KHTML, like Gecko) Chrome/24.0.1312.57 Safari/537.17
X-Requested-With:XMLHttpRequest

Query String Parameters
transport:serverSentEvents
connectionToken:lnTczB...

Form Data
data:{"H":"realtimeconnectionhub","M":"BroadcastMessage","A":["testuser","test"],"I":0}

Response Headers
Cache-Control:no-cache
Content-Type:application/json; charset=UTF-8
Date:Mon, 25 Feb 2013 15:58:04 GMT
Expires:-1
Persistent-Auth:false
Pragma:no-cache
Server:Microsoft-IIS/7.5
Transfer-Encoding:chunked
WWW-Authenticate:Negotiate oYGyMIGvoAMKAQChCwY...
X-AspNet-Version:4.0.30319
X-Content-Type-Options:nosniff
X-Powered-By:ASP.NET
4

1 回答 1

20

因此，您的问题在于您在使用集线器代理注册任何客户端方法之前开始连接。

有两种方法可以解决这个问题。

  1. 在 $.connection.hub.start 之前的 init 中调用您的 _subscribe 方法。
  2. 确保您在开始之前定义了至少 1 个客户端方法（需要“订阅”传入消息）。启动后使用 .on 订阅中心方法。

所以这是代码中的两种方法。

1：

var rtcom = new RealtimeConnection();
rtcom.init({debug: true});

RealtimeConnection: function () {    
    var
        _rtHub = $.connection.realtimeConnectionHub,
        _initialized = false,                
        _init = function (options, cb) {
            options = options || {};

            $.connection.hub.logging = options.debug;

            _rtHub.client.onBroadcastMessage = function() {
                alert("message");
            };

            $.connection.hub.start().done(function () {
                _initialized = true;

                if (cb) { cb(); }
            });
        },

        _broadcast = function (message) {
            if (_initialized) {
                _rtHub.server.broadcastMessage("testuser", message);
            }
        },

    return {
        initialized: _initialized,
        broadcast: _broadcast,
        init: _init
    };
}

$("#container").on("click", "button.chat-btnSendMessage", function () {
    rtcom.broadcast($(this).parent().find("input").val());
});

2：

var rtcom = new RealtimeConnection();
rtcom.init({debug: true}, function () {
    rtcom.subscribe(function (sender, message) {
        if (message) {
            alert("message");
        }
    });
});

RealtimeConnection: function () {    
    var
        _rtHub = $.connection.realtimeConnectionHub,
        _initialized = false,                
        _init = function (options, cb) {
            options = options || {};

            // Need to have at least 1 function registered to be subscribed to hub
            _rtHub.client.foo = function() {};

            $.connection.hub.logging = options.debug;
            $.connection.hub.start().done(function () {
                _initialized = true;

                if (cb) { cb(); }
            });
        },

        _broadcast = function (message) {
            if (_initialized) {
                _rtHub.server.broadcastMessage("testuser", message);
            }
        },

        _subscribe = function (cb) {
            if (_initialized) {
                _rtHub.on("onBroadcastMessage", cb);
            }
        };

    return {
        initialized: _initialized,
        broadcast: _broadcast,
        subscribe: _subscribe,
        init: _init
    };
}

$("#container").on("click", "button.chat-btnSendMessage", function () {
    rtcom.broadcast($(this).parent().find("input").val());
});

希望这可以帮助！

于 2013-02-25T18:38:56.400 回答