当使用flush from php时，xmlhttprequest不触发就绪状态3的响应事件处理程序 [英] xmlhttprequest not firing response event handler for ready state 3 when using flush from php

问题描述

我使用xmlhttprequest从Google Chrome扩展程序发送请求远程服务器

我在manifest.json中设置了访问远程主机的权限

基本上它工作正常如预期。我想要的是readystate 4当响应完成时触发。

因为它是一个8到10秒的过程在服务器端我使用echo从服务器

因此，我使用readyState == 3条件显示服务器响应

但是当我测试的readystate 1和4正在触发事件处理程序而不是2和3

这里是我使用的代码

  var wini = window.open（''，''）; 
 var sta =''; 
 var jax = new XMLHttpRequest（）; 
 jax.onreadystatechange = function（）{
 sta = sta + jax.readyState +'，'
 wini.document.write（sta +'< br>'）; 
 
} 
 jax.open（POST，http://sitename.com/subscript/?save=save&tstamp=+ Math.random（））; 
 jax.setRequestHeader（Content-Type，application / x-www-form-urlencoded）; 
 //jax.setRequestHeader(\"Connection：close）; 
 jax.send（somedata =+ encodeURIComponent（window.somedata））; 
  

不同的结果。除了readystate 1没有其他被触发。

因此，readystates 1和4工作正常，但不是2和3.最需要的是3。

代码运行实际发生的是：

1，打印在弹出窗口然后8到9秒通过，当就绪状态为4时

1,2

< 3

1,2,3,4

上述三行都是一次列印。所以我假设只有readystate 4我从服务器得到所有的响应，而不是在阅读状态为3时。

我在其他Web应用程序中使用了readystate 3

这个xhr我不知道我失踪了什么。

如何使用readystate 3这里？

解决方案

最后我发现只有在chrome和safari它不因为chrome正在使用safari webkit，可能是webkit不想像别人一样工作。

添加了内容类型标题， strong>

另一个用户有类似的问题，我一直在试验，并发现了以下解决方案。

这里是我的回答。

PHP Flush（）无法运作在Chrome 中

I am sending a request a remote server from google chrom extension using xmlhttprequest

I have set permissions in the manifest.json to access remote hosts

Basically it is working fine as expected. what i had expected is readystate 4 it is fired when the response has completed.

Since it is a 8 to 10 second process in the server side i use echo from the server side to the client for status update.

so i use readyState==3 condition to show server response

but when i tested readystate 1 and 4 are firing the event handler and not 2 and 3

here is the code i use

var wini = window.open('','');
var sta='';
var jax = new XMLHttpRequest();
jax.onreadystatechange = function() {
    sta = sta + jax.readyState + ', '
    wini.document.write(sta+'<br>');

}
jax.open("POST","http://sitename.com/subscript/?save=save&tstamp="+Math.random());
jax.setRequestHeader("Content-Type","application/x-www-form-urlencoded");
//jax.setRequestHeader("Connection: close");
jax.send("somedata=" + encodeURIComponent(window.somedata));

using connection close. a different result. except readystate 1 no others were fired

So, readystates 1 and 4 are working fine but not 2 and 3. what is most needed is 3.

what is actually happens with the code runs is:

1, is printed in the popup window and then 8 to 9 secs pass and when ready state is 4

1,2

1,2,3

1,2,3,4

the above three lines are printed in one shot. so i assume only by readystate 4 i am getting all the response from the server and not while readystate is 3.

I have used readystate 3 in other web applications which is of same origin and it worked and is still working.

for this xhr i don't know what i am missing.

How to make use of readystate 3 here?

解决方案

at last i found that only in chrome and safari it does not work because chrome is using safari webkit and may be webkit doesn't want to work like others.

added a content type header and it worked as expected

another user had a similar issue and i had been experimenting and found the following solution.

since my solutions solves both the questions i am linking the answer which i had already given in others question instead of duplicating it here.

here is my answer.

PHP Flush() not working in Chrome

这篇关于当使用flush from php时，xmlhttprequest不触发就绪状态3的响应事件处理程序的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！