服务器发送的事件工作，但具有大量的时间延迟 [英] Server sent events work, but with a massive time delay

问题描述

伊利诺伊州说这工作完全在我的本地机器上启动关闭时，JS下面的例子连接到stream.php并接收服务器的持续更新当前时间每一秒。

Ill start off by saying this works perfectly on my local machine, the js example below connects to stream.php and receives a continuous update of the servers current time every second.

var source = new EventSource("stream.php");

source.addEventListener('message', function(e) {
    console.log(e);
}, false);

source.addEventListener('open', function(e) {
    console.log(e);
}, false);

source.addEventListener('error', function(e) {
    if (e.readyState == EventSource.CLOSED) {
        console.log('closed');
    }
}, false);

stream.php

while(true)
{
    // Headers must be processed line by line.
    header('Content-Type: text/event-stream');
    header('Cache-Control: no-cache');

    // Set data line
    print "data: " . date( 'G:H:s', time() ) . PHP_EOL . PHP_EOL;

    // Toilet
    flush();

    // Wait one second.
    sleep(1);
}

我也希望有点延迟上传到现场后开发。服务器。但存在的约15至20分钟的时间延迟。之前，我连看的第一项。

I did expect a bit of a delay after uploading to the live dev. server. But there is a time delay of about 15 to 20 min. before I even see the first entry.

连接不下降。 （习题已经持续40分钟。现在+）。这只是一个Apache循环的问题（意味着它的时间来看看网络接口）或者是有什么我可以做来解决这个问题？

The connection does not drop. (Prob. been going 40 min. + now.) Is this just an Apache looping problem (means it time to look at web sockets) or is there something I can do to fix this?

推荐答案

Server.php需要如下：

Server.php needs to be as follows:

while(true)
{
    // Headers must be processed line by line.
    header('Content-Type: text/event-stream');
    header('Cache-Control: no-cache');

    // Set data line
    print "Event: server-time" . PHP_EOL;
    print "data: " . date( 'G:H:s', time() ) . PHP_EOL;
    print PHP_EOL;

    ob_end_flush();     // Strange behaviour, will not work
    flush();            // Unless both are called !

    // Wait one second.
    sleep(1);
}

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