XMLHttpRequest error only in IE

Question

We use an XMLHttpRequest mock up object to test our ExtJs 4.1 app with Jasmine. Now, everythings works perfectly in Chrome and Firefox, but IE versions 7 till 9 are making trouble as always.

There is an error at onreadystatechange function,

if readyState is 1 then SCRIPT575 (cannot continue due to error c00c023f)

if readyState is 2 then SCRIPT10 (required data not yet available)

See this Jsfiddle (search for "error" to jump to line)

Additionally, there is a error TypeError: Object expected.

What I have read:

I read a couple of posts like this and that, but none of the recommendations fixed it.

Note:

in Chrome & Firefox all requests only return readyState 4, but in IE readyState the values are repeated from 1 till 4 (?).

Chrome & FF
readyState 4 => OK
readyState 4 => OK
readyState 4 => OK
readyState 4 => OK
readyState 4 => OK
...

IE:
readyState 1 => error
readyState 2 => error
readyState 3 => OK
readyState 4 => OK
readyState 1 => error
...

Can you guide me how to fix this? I have no clue.

score 1 · Answer 1 · answered Dec 07 '12 at 10:35

1

Check the readyState value before reading responseXML/responseText properties. If readyState value is 4, you can safely access responseXML/responseText

(The original implementation and later specification of XMLHttpRequest required implementations to throw exception on access to data before object has completed I/O operation)

answered Dec 07 '12 at 10:35

Sergey Ilinsky

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Thanks for the answer. When I check with `if( oXhr.readyState > 3 )` these errors are gone.But still, why are there 1-4 readystates in IE. Now, another error comes up `object expected` in ExtJs. I will check that and get back. – Shlomo Dec 07 '12 at 11:28
There is chance you are running sync requests, these may not trigger all readyState changes in other than IE9- browsers. – Sergey Ilinsky Dec 07 '12 at 13:22
Yes I use `Ext.syncRequire` but also tried `Ext.require`. No difference. – Shlomo Dec 10 '12 at 08:15

score -1 · Accepted Answer · answered Dec 10 '12 at 14:21

There was a property named response that should be responseText.

Also, I am checking readyState with if( typeof oXhr.readyState !== 'undefined' ) {}

Now my code works in IE8, IE9 (Standard).

However, IE8, IE9 (Quirks) and IE 7 (Quirks & Standard) fail with error:

SCRIPT16389: Unknown error

I will try to fix, but this question is done.

XMLHttpRequest error only in IE

2 Answers2