Question

我正在使用Pusher（pusher.com）在管理员发送通知时触发所有登录客户端的通知。

出于某种原因，事件是两次拍摄，虽然我只触发一次。

客户端订阅代码：

var handleToastrListener = function() {

     var pusher = new Pusher("913284db62a0cc237db4");
     var channel = pusher.subscribe('toastr-channel');

           channel.bind('new-toast', function(data) {

            toastr.options = data.options;
            var $toast = toastr[data.scf](data.msg, data.title);

           return true;

           });  
   }

       handleToastrListener();

服务器端发布代码（使用pusher包的PHP）：

 $pusher = new Pusher(PUSHER_KEY, PUSHER_SECRET, PUSHER_APP_ID);
 $pusher->trigger('toastr-channel', 'new-toast', $input );

Pusher调试控制台显示只收到一条消息。

然而，pusher-js Javascript日志记录显示两条消息：

Pusher : Event recd : {"event":"new-toast","data":{"options":{"positionClass":"toast-top-right","onclick":"","showDuration":"1000","hideDuration":"1000","timeOut":"5000","extendedTimeOut":"1000","showEasing":"swing","hideEasing":"linear","showMethod":"fadeIn","hideMethod":"fadeOut"},"title":"Toastr Notifications","msg":"Gnome & Growl type non-blocking notifications","scf":"success"},"channel":"toastr-channel"} app.js:143
Pusher : Event recd : {"event":"new-toast","data":{"options":{"positionClass":"toast-top-right","onclick":"","showDuration":"1000","hideDuration":"1000","timeOut":"5000","extendedTimeOut":"1000","showEasing":"swing","hideEasing":"linear","showMethod":"fadeIn","hideMethod":"fadeOut"},"title":"Toastr Notifications","msg":"Gnome & Growl type non-blocking notifications","scf":"success"},"channel":"toastr-channel"}

进一步观察我发现订阅发生了两次，虽然我只打了一次：

Pusher : Event sent : {"event":"pusher:subscribe","data":{"channel":"toastr-channel"}} app.js:143
Pusher : Event recd : {"event":"pusher_internal:subscription_succeeded","data":{},"channel":"toastr-channel"} app.js:143
Pusher : No callbacks on toastr-channel for pusher:subscription_succeeded app.js:143
Pusher : State changed : connecting -> connected app.js:143
Pusher : Event sent : {"event":"pusher:subscribe","data":{"channel":"toastr-channel"}} app.js:143
Pusher : Event recd : {"event":"pusher_internal:subscription_succeeded","data":{},"channel":"toastr-channel"} app.js:143
Pusher : No callbacks on toastr-channel for pusher:subscription_succeeded

Answer 1

你应该好好看看并妥善更新你的问题：

The Pusher Debug Console - 在那里显示两次事件？
pusher-js JavaScript logging - 事件被记录为传入两次？

这里的另一个常见问题是有时事件可能被绑定两次 - 因此，两次回调。但是，您的代码并不表示会发生这种情况。

Pusher事件被触发两次

1 个答案: