SignalR客户端具有多个连接

Question

我有多个SignalR'服务'正在运行,只有一个UI可以访问它们.

如何让客户端js与不同Url的多个连接通信？因为看起来我只能为$ .connection.hub指定一个url,而且我不能使用多个'signalr/hubs'客户端脚本.

有帮助吗？谢谢.

Answer 1

$ .connection.hub在/ signalr/hubs包含中创建.

在文件的最后它基本上做:

$.connection.hub = $.hubConnection("/signalr", { useDefaultPath: false });

要创建集线器代理,您可以:

var myHub = $.connection.hub.createHubProxy('myHub');

多个连接的简单示例:

var connection1 = $.hubConnection("http://www.myfirstendpoint.com");
var connection2 = $.hubConnection("http://www.mysecondendpoint.com");

var myCon1Hub = connection1.createHubProxy('myCon1Hub');
var myCon2Hub = connection2.createHubProxy('myCon2Hub');

myCon1Hub.client.foo = function() { ... Whatever you want ... };
myCon2Hub.client.foo = function() { ... Whatever you want ... };

connection1.start();
connection2.start();

Answer 2

我对这种场合的解决方案:

var SignalRHelpers = function () {
  var _connectionDeferred;

  var subscribeToConnectionStart = function (callback) {
    if (!_connectionDeferred)   // start connection if not yet initialized
        _connectionDeferred = $.connection.hub.start();

    if ($.connection.hub.state == $.connection.connectionState.connected && callback) {
        // already connected
        callback();
    } else if (callback) {
        // register handler
        _connectionDeferred.done(callback);
    }
  };

  return {
    SubscribeToConnectionStart: subscribeToConnectionStart
  };
}();

它在内部存储来自start()的promise对象,并根据需要附加处理程序.

基本上,每次需要连接时,只需调用SignalRHelpers.SubscribeToConnectionStart即可.例如

SignalRHelpers.SubscribeToConnectionStart(function(){
    someHub.server.executeSomething();
});