Andrzej,
the content negotiation algorithm implemented by the Restlet v1.1 is a
bit lost when the preference "*/*" has a quality of 1.0.
Since it loops over the the declared variants, it first calculates the
score of the json variant. Since the "*/*" has a quality of 1, the
computed score is the highest possible...
One way is to systematically under valuate the "*/*" preference in a filter:
class MyFilter extends Filter {
@Override
protected int beforeHandle(Request request, Response response) {
List<Preference<MediaType>> prefs = request.getClientInfo()
.getAcceptedMediaTypes();
if (prefs != null && !prefs.isEmpty()) {
for (Preference<MediaType> preference : prefs) {
if (preference.getMetadata().equals(MediaType.ALL)) {
preference.setQuality(0.1f);
}
}
}
return Filter.CONTINUE;
}
}
NB : the conneg algorithm has been updated in the Restlet 2.0 trunk. It
systematically sets a quality of 0.001.
Best regards,
Thierry Boileau
> Thierry,
>
> That actually changed the request. Still get JSON though. Restlet content
> negotiates APPLICATION_JSON. How can we get APPLICATION_XML ?
>
>
> Request:
> GET /coralreef-resource/file/status?user=greg.savaged&_=1260974638188
> HTTP/1.1
> Accept: application/xml, text/xml, */*
> Accept-Language: en-us
> x-requested-with: XMLHttpRequest
> UA-CPU: x86
> Accept-Encoding: gzip, deflate
> User-Agent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.0; SLCC1; .NET
> CLR 2.0.50727; .NET CLR 3.5.21022; .NET CLR 3.5.30729; .NET CLR 3.0.30618)
> Host: 10.1.10.166:8181
> Connection: Keep-Alive
> Authorization: Basic Z3JlZy5ob2NoYXJkOmJlcmljbw==
>
>
>
>
> Thierry Boileau wrote:
>
>> Hi Andrzej
>>
>> could you use the "dataType" argument instead of the "beforeSend" one?
>>
>> $.ajax({type: 'GET',
>> url: myUrl,
>> success: onAjaxSuccess,
>> error: onAjaxError,
>> cache: false,
>> dataType: "xml");
>>
>>
>> Best regards,
>> Thierry Boileau
>>
>>
>>> Thierry,
>>>
>>> 1) Our JQuery Ajax call:
>>>
>>> $.ajax({
>>> type: 'GET',
>>> url: myUrl,
>>> success: onAjaxSuccess,
>>> error: onAjaxError,
>>> cache: false,
>>> beforeSend :
>>> function(xhr){xhr.setRequestHeader('Accept','application/xml')}
>>> });
>>>
>>> Will generate Accept header of "*/*, application/xml". We want
>>> "application/xml".
>>>
>>> 2) Our Restlet 1.1.5
>>>
>>> @Override
>>> public Restlet createRoot() {
>>> // Create a router Restlet.
>>> Router router = new Router(getContext());
>>>
>>> // Attach our routers.
>>> router.attach("/test", HelloWorldResource.class);
>>> router.attach("/file/status", FileStatusResource.class);
>>>
>>> return router;
>>> }
>>>
>>>
>>> public FileStatusResource(Context context, Request request, Response
>>> response) {
>>> super(context, request, response);
>>>
>>> // Read URI query strings.
>>> Form form = request.getOriginalRef().getQueryAsForm();
>>> if (form != null) {
>>> setUser(form.getFirstValue("user", isIgnoreCase()));
>>> setOriginalUri(form.getFirstValue("originalUri",
>>> isIgnoreCase()));
>>> setAction(form.getFirstValue("action", isIgnoreCase()));
>>> }
>>>
>>> // Variants that our resource generates.
>>> getVariants().add(new Variant(MediaType.APPLICATION_JSON));
>>> getVariants().add(new Variant(MediaType.APPLICATION_XML));
>>>
>>> }
>>>
>>> @Override
>>> public Representation represent(Variant variant) throws ResourceException
>>> {
>>> Representation representation = null;
>>>
>>> // Validate request
>>> if (StringUtils.isBlank(getUser())) {
>>> log.debug("GET FileStatusResource bad user. ");
>>> representation = representError(variant, new
>>> ErrorMessage());
>>>
>>> getResponse().setStatus(Status.CLIENT_ERROR_BAD_REQUEST);
>>> return representation;
>>> }
>>>
>>> representation = representGet(this,variant);
>>> return representation;
>>> }
>>>
>>> public final Representation representGet(CoralReefResource crr, Variant
>>> variant)
>>> throws ResourceException {
>>> Representation representation = null;
>>>
>>> log.debug("HTTP GET for : " + variant.getMediaType().getName());
>>> ...
>>>
>>>
>>>
>>>
>>> Thierry Boileau wrote:
>>>
>>>
>>>> Hello Andrzej,
>>>>
>>>> I wonder if the source cause if your issue is out there.
>>>> Could you tell us how are built your resources? How do you send the
>>>> request using jquery?
>>>>
>>>> Best regards,
>>>> Thierry Boileau
>>>>
>>>>
>>>>
>>>>> Our Restlet resource server APPLICATION_JSON and APPLICATION_XML. A
>>>>> JQuery
>>>>> client, sets the Accept Type to "*/*, application/xml". So the Restlet
>>>>> negotiates that APPLICATION_JSON should be returned as expected.
>>>>> However,
>>>>> we
>>>>> want APPLICATION_XML to be served. The problem is that we are unable to
>>>>> remove the "*/*" as the first Accept type in JQuery. JQuery seems to
>>>>> tack
>>>>> on
>>>>> the "*/*" as an Accept Type to every request we send.
>>>>>
>>>>> Is there an elegant way in Restlet to filter the "*/*" values, e.g. ALL
>>>>> or
>>>>> APPLICATION_ALL? We can certainly get the Accept Headers in Restlet and
>>>>> re-arrange the Accept list ourselves to "override" the Restlet
>>>>> negotiation.
>>>>> We are thinking of filtering, after Restlet negotiation, based on the
>>>>> User-Agent header for this particular JQuery client, so as not to
>>>>> "break"
>>>>> the Restlet behaviour for other clients (which is what we expect.)
>>>>>
>>>>>
>>>>>
>>>> ------------------------------------------------------
>>>> http://restlet.tigris.org/ds/viewMessage.do?dsForumId=4447&dsMessageId=2430776
>>>>
>>>>
>>>>
>>>>
>>>
>> ------------------------------------------------------
>> http://restlet.tigris.org/ds/viewMessage.do?dsForumId=4447&dsMessageId=2430802
>>
>>
>>
>
>
------------------------------------------------------
http://restlet.tigris.org/ds/viewMessage.do?dsForumId=4447&dsMessageId=2430822
