Question

我的AngularJS控制器中有以下事件监听器（如PubNub SDK文档中所示），如果在邮件进入后刷新浏览器，则会在一条消息上多次触发。

但data原始调用Pubnub.getMessageEventNameFor()之后data为空，所以除了检查$scope.$on(Pubnub.getMessageEventNameFor($scope.myChannel), function(ngEvent, data) { $scope.$apply(function() { processMessage(data.message); }); });（这似乎是一个黑客掩盖另一个问题）之外，这个函数是如何/为什么被反复打电话？

using System;
using System.IO;
using System.Collections.Generic;
internal static class StreamReaderExtensions
{
    public static IEnumerable<string> ReadUntil(this StreamReader reader, string delimiter)
    {
        List<char> buffer = new List<char>();
        CircularBuffer<char> delim_buffer = new CircularBuffer<char>(delimiter.Length);
        while (reader.Peek() >= 0)
        {
            char c = (char)reader.Read();
            delim_buffer.Enqueue(c);
            if (delim_buffer.ToString() == delimiter || reader.EndOfStream)
            {
                if (buffer.Count > 0)
                {
                    if (!reader.EndOfStream)
                    {
                        buffer.Add(c);
                        yield return new String(buffer.ToArray()).Substring(0, buffer.Count - delimeter.Length);
                    }
                    else
                    {
                        buffer.Add(c);
                        if (delim_buffer.ToString() != delimiter)
                            yield return new String(buffer.ToArray());
                        else
                            yield return new String(buffer.ToArray()).Substring(0, buffer.Count - delimeter.Length);
                    }
                    buffer.Clear();
                }
                continue;
            }
            buffer.Add(c);
        }
    }

    private class CircularBuffer<T> : Queue<T>
    {
        private int _capacity;

        public CircularBuffer(int capacity)
            : base(capacity)
        {
            _capacity = capacity;
        }

        new public void Enqueue(T item)
        {
            if (base.Count == _capacity)
            {
                base.Dequeue();
            }
            base.Enqueue(item);
        }

        public override string ToString()
        {
            List<String> items = new List<string>();
            foreach (var x in this)
            {
                items.Add(x.ToString());
            };
            return String.Join("", items);
        }
    }
}

有没有办法阻止此侦听器多次触发？

更新：多个火灾各自与先前的消息相关联，而不是相同消息的多次激发。这听起来越来越像Pubnub AngularJS SDK问题。

PubNub AngularJS服务反复触发

0 个答案: