While I await any suggestions to workaround this issue I have filed the
following RFE for a longer term solution to the problem:
<
https://jersey.dev.java.net/issues/show_bug.cgi?id=201>
Thanks.
Farrukh Najmi wrote:
>
> Here is the more complete code for my ResponseFilter. I would
> appreciate any tips on how to remove all occurances of '@' sign from
> my response within this filter. Thanks.
>
> /**
> * ResponseFilter to implement JSONP Callback support.
> * See: http://en.wikipedia.org/wiki/JSON#JSONP
> http://developer.yahoo.com/common/json.html#callbackparam
> *
> * @author najmi
> */
> public class JSONCallbackResponseFilter implements
> ContainerResponseFilter {
>
> private static final Log LOG =
> LogFactory.getLog(JSONCallbackResponseFilter.class);
>
> public ContainerResponse filter(ContainerRequest request,
> ContainerResponse response) {
>
> MultivaluedMap<String, String> queryParamsMapMulti =
> request.getQueryParameters();
> Map queryParamsMap =
> RegistryRestInterface.convertMultiToSingleValueMap(queryParamsMapMulti);
> LOG.debug("JSONCallbackResponseFilter queryParamsMap=" +
> queryParamsMap);
> String callback = (String) queryParamsMap.get("callback");
> LOG.debug("callback=" + callback);
> if (callback != null) {
> response.setContainerResponseWriter(new
> JSONCallbackResponseAdapter(response.getContainerResponseWriter(),
> callback));
> }
> return response;
> }
>
> /**
> *
> * See:
> http://n2.nabble.com/-Filter--how-to-customize-context-body---td2116754.html
>
> */
> private static final class JSONCallbackResponseAdapter implements
> ContainerResponseWriter {
>
> private final ContainerResponseWriter crw;
> private OutputStream out;
> private String callback;
>
> JSONCallbackResponseAdapter(ContainerResponseWriter crw, String
> callback) {
> this.crw = crw;
> this.callback = callback;
> }
>
> public OutputStream writeStatusAndHeaders(long contentLength,
> ContainerResponse response) throws IOException {
> out = crw.writeStatusAndHeaders(-1, response);
>
> out.write((this.callback + "(").getBytes());
> return out;
> }
>
> public void finish() throws IOException {
> out.write(")".getBytes());
> }
> }
> }
>
>
>
> Farrukh Najmi wrote:
>> Paul Sandoz wrote:
>>> On Feb 3, 2009, at 3:21 AM, Farrukh Najmi wrote:
>>>
>>>>> <servlet>
>>>>> <servlet-name>Registry REST Interface</servlet-name>
>>>>>
>>>>> <servlet-class>com.sun.jersey.spi.spring.container.servlet.SpringServlet</servlet-class>
>>>>>
>>>>> <init-param>
>>>>>
>>>>> <param-name>com.sun.jersey.spi.container.ContainerResponseFilters</param-name>
>>>>>
>>>>>
>>>>> <param-value>xxx.SomeClass.JSONCallbackResponseFilter</param-value>
>>>>> </init-param>
>>>>> <load-on-startup>4</load-on-startup>
>>>>> </servlet>
>>>>>
>>>>> What I am finding is that the ResponseFilter is never being called.
>>>>>
>>>>> Why would that be?
>>>>>
>>>> Apparently it has something to do with the
>>>> JSONCallbackResponseFilter being a nested class. Once I made it a
>>>> top level class all is well. I am all set on the workaround. Thanks.
>>>>
>>>
>>> You are not using the correct fully qualified name for an inner
>>> class, it needs to be:
>>>
>>> xxx.SomeClass$JSONCallbackResponseFilter
>>>
>>
>> Thank Paul for pointing out my mistake. The workaround is working now
>> but I have a different issue.
>>
>> The use of '@' sign in resulting JSON as described by BadgerFish is
>> causing a downstream problem for me as the toolkit I am using to
>> process JSON does not like it. So I need to fix my ResponseFilter to
>> remove '@' sign in the JSON output.
>>
>> Here is what my adapter class looks like:
>>
>> /**
>> *
>> * See:
>> http://n2.nabble.com/-Filter--how-to-customize-context-body---td2116754.html
>>
>> */
>> private static final class JSONCallbackResponseAdapter implements
>> ContainerResponseWriter {
>>
>> private final ContainerResponseWriter crw;
>> private OutputStream out;
>> private String callback;
>>
>> JSONCallbackResponseAdapter(ContainerResponseWriter crw,
>> String callback) {
>> this.crw = crw;
>> this.callback = callback;
>> }
>>
>> public OutputStream writeStatusAndHeaders(long contentLength,
>> ContainerResponse response) throws IOException {
>> out = crw.writeStatusAndHeaders(-1, response);
>>
>> out.write((this.callback + "(").getBytes());
>> return out;
>> }
>>
>> public void finish() throws IOException {
>> out.write(")".getBytes());
>> }
>> }
>>
>> I do not quite understand the above code originally from you. Where
>> does the main body of the response get injected taht I need to filter?
>>
>> What would I need to change to remove '@' sign globally from the
>> response?
>>
>> Thanks for your help.
>>
>
>
--
Regards,
Farrukh
Web: http://www.wellfleetsoftware.com