On 1/22/2013 12:36 PM, Sergey Beryozkin wrote:
> On 22/01/13 16:55, Julian Reschke wrote:
>> On 2013-01-22 17:47, Sergey Beryozkin wrote:
>>> Hi
>>>
>>> Now and then I'm finding I'm not exactly sure what
>>> HttpHeaders.getRequestHeader() which returns a list of String is
>>> supposed to return for different types of headers, such that it can all
>>> be portable.
>>>
>>> For example, consider these 2 headers:
>>>
>>>
>>> Accept: a/b,c/d
>>> Authorization: CustomScheme a=2,b=3,c=4
>>>
>>> What is the spec-compliant response from
>>> HttpHeaders.getRequestHeader() ? :
>>>
>>> 1. A single value list, with a single value containing "a/b,c/d" for
>>> Accept and "CustomScheme a=2,b=3,c=4"
>>> 2. List with two values for Accept ("a/b", "c/d") and List with 3 or 4
>>> values for Authorization, example ("CustomScheme a=2", "b=3", "c=4")?
>>> ...
>>
>> You can't split on "," unless you exactly know the ABNF of the header
>> field.
> OK, "CustomScheme a=2,b=3,c=4" is actually a single header value so
> splitting it is wrong I guess, I guess it is then unfortunate that for
> most other headers where "," actually represents a split character it
> won't be processed.
>
> So I'm concluding for now that from the API implementation's point of
> view the following is always true:
>
> List<String> values = HttpHeaders.getRequestHeader("a");
> assertEquals(1, values.size())
> assertEquals(values.get(0), HttpHeaders.getHeaderString("a"));
>
> unless we have:
>
> a: a1
> a: a2
>
> I still wonder what HttpHeaders.getRequestHeader("Accept") will return
> in Jersey and RestEasy, given "Accept: a/b,c/d"
>
I think we return "a/b,c/d". If you want to get the requested media
types, there is a different method for that in the JAX-RS spec. :)
--
Bill Burke
JBoss, a division of Red Hat
http://bill.burkecentral.com