Question

我正在使用带有Signalr 1.0.0软件包的VS2012“Fall”更新。调用服务器端功能正常。但是不调用客户端功能。当onBroadcastMessage()（见下文）被调用时，似乎没有任何事情发生。

问题：

我错过了什么？
有没有办法调试客户端电话？

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);
        }
    }
}

路线注册：

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

        ...
    }
}

客户代码（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());
});

记录（使用chrome）：

[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

Answer 1

因此，您的问题在于，在向集线器代理注册任何客户端方法之前，您已开始建立连接。

有两种方法可以解决这个问题。

在$ .connection.hub.start之前的初始化中调用_subscribe方法。
确保在启动之前至少定义了一个客户端方法（要求“订阅”传入消息）。启动后使用.on订阅集线器方法。

所以这是代码中的两种方法。

<强> 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());
});

<强> 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());
});

希望这有帮助！

信号器不调用客户端功能

1 个答案: