[英]How to handle SignalR server exception at client?
The error handler is added like this at client: 错误处理程序在客户端添加如下:
$.connection.hub.url = "/signalr";
$.connection.hub.logging = true;
$.connection.hub.error(function(error) {
console.log('SignalrAdapter: ' + error);
});
$.connection.hub.start().done(function() { me.onStartDone(); });
// ...
At server it is: 在服务器上它是:
hubConfiguration.EnableDetailedErrors = true;
Accordingly to the docs this should be enough. 根据文档,这应该足够了。
At my exception throwing it just displays a log text for it and does not invoke the handler: 在我的异常中抛出它只显示它的日志文本而不调用处理程序:
[18:18:19 GMT+0000()] SignalR: ... [[[my error description here]]] ...
At my cshtml page: 在我的cshtml页面:
<script src="~/Scripts/vendor/jquery.signalR-2.1.2.js"></script>
<script src="~/signalr/hubs"></script>
However if I attach an error handler to the method itself it is got called: 但是,如果我将错误处理程序附加到方法本身,则会调用它:
$.connection.operatorHub.server.myMethodName(someParam).fail(function(error) {
console.log("Error handler called: " + error);
});
How to handle a general error? 如何处理一般错误?
UPDATE. UPDATE。 The answer is below.
答案如下。 Also see these:
另见这些:
Hope it helps someone. 希望它可以帮助某人。
I tested on a little chat project (downloaded here) it seems this method handle only connection errors. 我测试了一个小聊天项目(这里下载)似乎这个方法只处理连接错误。
$.connection.hub.error(function(error) {
console.log('SignalrAdapter: ' + error);
});
I was able to handle all exceptions with the HubPipelineModule
class. 我能够使用
HubPipelineModule
类处理所有异常。
1) I created a SOHubPipelineModule
1)我创建了一个
SOHubPipelineModule
public class SOHubPipelineModule : HubPipelineModule
{
protected override void OnIncomingError(ExceptionContext exceptionContext,
IHubIncomingInvokerContext invokerContext)
{
dynamic caller = invokerContext.Hub.Clients.Caller;
caller.ExceptionHandler(exceptionContext.Error.Message);
}
}
2) I Added the module to GlobalHost.HubPipeline
2)我将模块添加到
GlobalHost.HubPipeline
// Any connection or hub wire up and configuration should go here
GlobalHost.HubPipeline.AddModule(new SOHubPipelineModule());
var hubConfiguration = new HubConfiguration { EnableDetailedErrors = true };
app.MapSignalR(hubConfiguration);
3) My ChatHub
class : 3)我的
ChatHub
类:
public class ChatHub : Hub
{
public void Send(string name, string message)
{
throw new Exception("exception for Artyom");
Clients.All.broadcastMessage(name, message);
}
}
4) In the js I use this code to get my exception message : 4)在js中我使用此代码来获取我的异常消息:
$.connection.chatHub.client.exceptionHandler = function (error) {
console.log('SignalrAdapter: ' + error);
alert('SignalrAdapter: ' + error);
};
I've used the error handling on the client like this: 我在客户端上使用了错误处理,如下所示:
It's for SignalR version 2 它适用于SignalR版本2
More detail: SignalR documentation - How to handle errors in the Hub class 更多细节: SignalR文档 - 如何处理Hub类中的错误
Hub - AppHub.cs: Hub - AppHub.cs:
public class AppHub : Hub
{
public void Send(string message)
{
throw new HubException("Unauthorized", new { status = "401" });
}
}
Client-side: 客户端:
$(function () {
var appHub = $.connection.appHub;
$.connection.hub.start().done(function () {
appHub.server.send("test message")
.fail(function (e) {
if (e.source === 'HubException') {
console.error("Error message: ", e.message);
console.error("Error status: ", e.data.status);
}
});
});
});
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