Encoding issue with jax-rs method with string argument to handle put/post of json data

[jgou]

When using a jax-rs method with string argument to handle a put or post of a json payload (utf-8), the string given as argument contains invalid characters when there are non-ascii characters in the json data. This was seen on a Windows OS, so it may be related to the OS-encoding.

Encoding issue occurs with:

@PUT
@Consumes("application/json")
public void updateFoo(String jsonString) {
  // ...
}

Workaround is to use a method with a byte-array argument and decode it yourself:

@PUT
@Consumes("application/json")
public void updateFoo(byte[] jsonBytes) {
  String jsonString = new String(bytes,"UTF-8");
  // ...
}

However it would be nice if there could be some fix to jax-rs (or even kauri) that makes it possible to use the String-argument methods with right encoding.

[mpo]

Without having looked into the details, but just to ban the obvious.
Did you try @Consumes("application/json;charset=UTF-8") ?

[jgou]

Replying to mpo:

Without having looked into the details, but just to ban the obvious.
Did you try @Consumes("application/json;charset=UTF-8") ?

Yes, I did try but with awkward result: when adding the charset to the 'consumes' annotation, the method isn't used at all (producing an error that no jax-rs mapping was found). Looks like the used jax-rs implementation doesn't like it ?

[mpo]

Rethinking this a bit I realize that my earlier proposal doesn't really make sense.

The client is in charge and will be setting the MimeType? (or not if default utf-8 is to be used) when performing the PUT.

So it really is the receiving system that should comply and do the correct thing.
(Meaning your workaround is actually a good one, but I agree the underlaying system could do a better effort probably)

Various strategies to proceed:

1. isolate the issue on the level of restlet's jax-rs implementation and open an issue there (+ hope for a solution)
2. same as above + delve into restlet to produce a fix (+hope on it being applied)
3. look into plugable jax-rs mapping logic maybe to handle this mimetype (not entirely sure how/if)

[jgou]

Someone started a thread about this issue on the restlet discussion list: ​http://restlet.tigris.org/ds/viewMessage.do?dsForumId=4447&dsMessageId=2626010

[jgou]

Replying to jgou:

Someone started a thread about this issue on the restlet discussion list: ​http://restlet.tigris.org/ds/viewMessage.do?dsForumId=4447&dsMessageId=2626010

restlet issue tracked in ​http://restlet.tigris.org/issues/show_bug.cgi?id=1147

[jgou]

should be fixed in restlet r6766 , so to resolve this issue we should upgrade restlet dependencies (and verify)

[jgou]

fixed by restlet upgrade #349