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[英]Why am I getting connection error on calling notify on Azure SignalR
[英]Connection with SignalR getting timeout error
我有我的 SignalR 服務,並嘗試將它與 .Net Core 的一個簡單應用程序連接起來。 當瀏覽器調用https://imubitsignalr.service.signalr.net:5001/client/negotiate?hub=usercount
我收到 ERR_CONNECTION_TIMED_OUT 錯誤。
我缺少什么?
程序:index.cshtml
<script type="text/javascript">
document.addEventListener('DOMContentLoaded', function () {
function bindConnectionMessage(connection) {
var messageCallback = function (message) {
console.log('message' + message);
if (!message) return;
var userCountSpan = document.getElementById('users');
userCountSpan.innerText = message;
};
connection.on("updateCount", messageCallback);
connection.onclose(onConnectionError);
}
function onConnected(connection) {
console.log('connection started');
}
function onConnectionError(error) {
if (error && error.message) {
console.error(error.message);
}
}
var connection = new signalR.HubConnectionBuilder().withUrl('/chat').build();
bindConnectionMessage(connection);
connection.start()
.then(function () {
onConnected(connection);
})
.catch(function (error) {
console.error(error.message);
});
});
</script>
在 startup.cs 我設置:
services.AddSignalR(hubOptions => {
hubOptions.EnableDetailedErrors = true;
hubOptions.KeepAliveInterval = TimeSpan.FromSeconds(3);
}).AddAzureSignalR();
樞紐代碼:
public class UserCount : Hub
{
private static int Count;
public override Task OnConnectedAsync()
{
Count++;
base.OnConnectedAsync();
this.Clients.All.SendAsync("updateCount", Count);
return Task.CompletedTask;
}
public override Task OnDisconnectedAsync(Exception exception)
{
Count--;
base.OnDisconnectedAsync(exception);
this.Clients.All.SendAsync("updateCount", Count);
return Task.CompletedTask;
}
}
映射集線器:
app.UseAzureSignalR(routes =>
{
routes.MapHub<UserCount>("/chat");
});
確保像這個例子一樣配置你的 WebApp:
public void Configure(IApplicationBuilder app, HostConfiguration hostConfiguration, ILogger<Startup> logger)
{
base.Configure(app, hostConfiguration, logger);
app.UseWebSockets();
app.UseCors(CorsPolicy);
app.UseAzureSignalR(routes =>
{
routes.MapHub<ChatHub>("/chat");
});
}
public void ConfigureServices(IServiceCollection services)
{
services.AddCors(options =>
{
options.AddPolicy(CorsPolicy, builder => builder.WithOrigins("https://localhost:4200")
.AllowAnyHeader()
.AllowAnyMethod()
.AllowCredentials()
.SetIsOriginAllowed((host) => true));
});
services.AddSignalR().AddAzureSignalR(azureOptions =>
{
azureOptions.ConnectionString = "connectionSringHere";
});
}
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