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Re: XHR: restrictions on request headers

From: Julian Reschke <julian.reschke@gmx.de>
Date: Wed, 12 Apr 2006 01:49:45 +0200
Message-ID: <443C4099.3040101@gmx.de>
To: Jonas Sicking <jonas@sicking.cc>
CC: Maciej Stachowiak <mjs@apple.com>, Web APIs WG <public-webapi@w3.org>

Jonas Sicking wrote:
> Julian Reschke wrote:
>> Jonas Sicking wrote:
>>>
>>>> I would tentatively say the following are not valid reasons to 
>>>> restrict a header:
>>>>
>>>> 4) It could result in content that the UA might not be able to parse 
>>>> as text or as XML (this can happen anyway with no custom headers).
>>>
>>> If a header will always cause the UA to not be able to parse the 
>>> response as neither text or XML then I think that could be 
>>> disallowed. There is no point in giving users a tool if the only 
>>> thing they can do with it is shoot themselfs in the foot.
>>>
>>> However I'm not sure if there are any such headers though, so this 
>>> might be a moot point.
>>
>> I assume that user agent are allowed to extend the object to support 
>> binary request and response streams (such as IE does), in which case 
>> that restriction wouldn't make any sense...
> 
> I'm not sure I follow you here.

IE's XmlHttpRequest object already supports binary streams, both for 
request bodies and for response bodies. If a UA allows that, restricting 
headers so that responses are always text or XML doesn't make sense anymore.

Hope this helps,

Julian
Received on Tuesday, 11 April 2006 23:52:05 GMT

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