406 Not Acceptable for List - REST

Question

I am trying to find a way instead of Wrapper class but I always get 406 Not Acceptable error. I searched online and tried many different ways but couldn't fix it.

@RequestMapping(value = "/users/getlist", headers="Accept=application/xml, application/json", method=RequestMethod.POST)
public @ResponseBody List<Permission> getList(@RequestParam String userEmail) {         
    List<Permission> permissions = service.getPermissions(userEmail);

      return permissions;
}

And

MultiValueMap<String, String> userMap = new LinkedMultiValueMap<String, String>();
userMap.add("userEmail", email_address);

// Prepare acceptable media type
List<MediaType> acceptableMediaTypes = new ArrayList<MediaType>();
acceptableMediaTypes.add(MediaType.APPLICATION_XML);

// Prepare header
HttpHeaders headers = new HttpHeaders();
headers.setAccept(acceptableMediaTypes);
HttpEntity<?> userEntity = new HttpEntity<Object>(userMap, headers);

List<Permission> permissions = restTemplate.postForObject("http://localhost:8080/users/getlist", userEntity, List.class);

I also tried;

List<Permission> permissions = (List<Permission>) restTemplate.postForEntity("http://localhost:8080/users/getlist", userEntity, List.class);

So basically if I use a wrapper class with getter and setter, it works. But i need to create many wrapper classes. Do you have any idea to implement like this?

SOLUTION:

Worked adding no mediatype to the http entity.

score 2 · Accepted Answer · answered Apr 28 '14 at 22:25

2

I believe that

headers="Accept=application/xml, application/json"

will require that your Accept header actually has the value application/xml, application/json. Your request doesn't.

You add a single acceptable media type.

List<MediaType> acceptableMediaTypes = new ArrayList<MediaType>();
acceptableMediaTypes.add(MediaType.APPLICATION_XML);

That will end up with a request header like

Accept: application/xml

Which won't match the @RequestMapping declared.

Instead, if you want the headers to match either application/xml or application/json, you can do

headers= {"Accept=application/xml", "Accept=application/json"}

or better yet

produces = {"application/xml", "application/json"}

answered Apr 28 '14 at 22:25

Sotirios Delimanolis

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thank you for the answer. I tried produces but still getting the 406 error. Do you have any other suggestion ? – likeachamp Apr 29 '14 at 13:15
@user3058742 Do you have Jackson on your classpath? – Sotirios Delimanolis Apr 29 '14 at 14:25
I have. When it is a single object, there is no problem. I couldn't figure out with collection. – likeachamp Apr 29 '14 at 14:29
@user3058742 Which Spring and Jackson versions are you using? I'm going to try to reproduce. – Sotirios Delimanolis Apr 29 '14 at 14:30
Spring 4.0.1.RELEASE , jackson 1.9.13 - Thank you ! – likeachamp Apr 29 '14 at 14:33
@user3058742 Oh, I didn't realize you were trying with XML. You'll need to register a custom `Jaxb2CollectionHttpMessageConverter` I believe. – Sotirios Delimanolis Apr 29 '14 at 15:08
@user3058742 Or consider wrapping the `List` in a POJO annotated with JAXB annotations. – Sotirios Delimanolis Apr 29 '14 at 15:11
I don't know how to do, let me try it. Also do you suggest with any other way that could be better or easier? – likeachamp Apr 29 '14 at 15:16
@user3058742 One option: http://stackoverflow.com/questions/7334557/how-to-force-springs-responsebody-to-use-xmlconvertor – Sotirios Delimanolis Apr 29 '14 at 15:18
Yes, i tried this option before and it worked. I need to work on list on many places so it is not going to be a good way to create a new class for all recent classes. Anyway, i will not have any other option if Jaxb2CollectionHttpMessageConverter not works. Thanks – likeachamp Apr 29 '14 at 15:21
@user3058742 Note that the `Jaxb2CollectionHttpMessageConverter` by itself doesn't work. You'll need to create a custom subclass. – Sotirios Delimanolis Apr 29 '14 at 15:22
I think i will go with wrapper class.. Thanks :) – likeachamp Apr 29 '14 at 15:37
Oh really ! when i send header like `HttpEntity> userEntity = new HttpEntity – likeachamp Apr 29 '14 at 17:09
@user I believe, when you don't send an Accept header, all content types are accepted. If you look at your content, it should be JSON. – Sotirios Delimanolis Apr 29 '14 at 17:13
Yes it seems as you say. Thank you ! – likeachamp Apr 29 '14 at 17:19

406 Not Acceptable for List - REST

1 Answers1