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Re: XHR: restrictions on request headers

From: Jonas Sicking <jonas@sicking.cc>
Date: Thu, 13 Apr 2006 23:10:11 -0700
Message-ID: <443F3CC3.6000709@sicking.cc>
To: Jim Ley <jim@jibbering.com>, Web APIs WG <public-webapi@w3.org>

Jim Ley wrote:
> "Jonas Sicking" <jonas@sicking.cc>
>> Jim Ley wrote:
>>> "Jonas Sicking" <jonas@sicking.cc>
>>>> Though the usecase for Accept-Charset seems fairly weak. Why 
>>>> couldn't the author simply filter responseText?
>>> How would an author do that?  Or do you mean the ASCII use case, and 
>>> not might accessibility tool use case?
>> The only use case I've heard so far is the ability to request a 
>> pure-ascii response. Or I guess more generally requesting an encoding 
>> that only contains a specific subset of the unicode map. However I'm 
>> not sure what value this gives over simply looping over responseText 
>> and testing if all chars are in the desired subset.
> As part of the W3's EARL work, it's likely I'll be resurrecting some 
> tools of mine which consume EARL reports about a site and present 
> information to the user about the problems, these tools either run in 
> the browser as a script extension, or by being installed on the site 
> that's tested.  To be able to show the error, I need to be able to 
> repeat the request that was tested, this means sending the same headers 
> - so I need to be able to achieve that.  Of course if the encoding is 
> not supported then I cannot do anything and expect it to fail, but in 
> the majority situation lots of encodings are supported so changing 
> preferences will work.

I'm not sure I understand the use case. Do you need to be able to send 
any combination of headers as was repeated earlier by another UA? If so 
I don't think we can ever archive that functionality since there will 
always be some headers that we want to limit.

/ Jonas
Received on Friday, 14 April 2006 06:10:23 UTC

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