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[XHR2] timeout

From: Anne van Kesteren <annevk@opera.com>
Date: Tue, 10 Nov 2009 17:22:03 -0800
To: "WebApps WG" <public-webapps@w3.org>
Message-ID: <op.u26s211y64w2qv@annevk-t60>
I was looking at defining the timeout feature. For consistency with "abort  
error" and "network error" it would make sense to introduce a TIMEOUT_ERR  
for synchronous requests, but Internet Explorer is probably not doing this  
(at least not per documentation).

For consistency with "abort error" and "network error" it would make sense  
to dispatch a readystatechange event. Per comments from Sunava Internet  
Explorer does not do this. Similarly it would make sense to move the state  
of the object to 4 rather than 0. Again, per Sunava Internet Explorer does  
not do this.

Personally I think we want to dispatch the readystatechange event, we want  
to switch the state of the object to 4, we want to dispatch a loadend  
event after the timeout event, we do not want to dispatch an abort event  
(this was suggested before), and we want to throw a TIMEOUT_ERR exception  
(code 23 or 24, depending on whether we want to reserve 23 for  
v2-datagrid) for the synchronous request case rather than dispatching  
events.

I also think we want to dispatch the timeout event to the  
XMLHttpRequestUpload object (in the asynchronous case) for consistency.

Thoughts?

(In case you miss the background, the API is a simple timeout attribute  
(unsigned long) on the XMLHttpRequest object that defines the timeout to  
be used when making a request. Whichever of the full response or the  
timeout "runs" to completion first wins. If the timeout attribute is 0  
(default value) the timeout API semantics do not affect the API and in  
case of a UA-defined timeout NETWORK_ERR/error will be returned instead.)


-- 
Anne van Kesteren
http://annevankesteren.nl/
Received on Tuesday, 10 November 2009 16:22:42 GMT

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