Java Spring MVC - Send JSON request body error

Question

I am trying to send a JSON string as a request to my application. This is my code:

@RequestMapping(
        value = "/mylink/upload",
        method = RequestMethod.POST,
        consumes ="application/json",
        produces = "application/json")
public
@ResponseBody
List<Upload> upload(
        @RequestParam(value = "hdfsLocation") String hdfsLocation

) throws Exception {
    return S3HdfsTransfer.uploadFromHDFS(hdfsLocation);
}

I am trying to send a request with Postman. The method I use is POST, the header contains: Accept "application/json",Content-Type "application/json", the request body is the following:

{
    "hdfsLocation" : "hdfs://145.160.10.10:8020"
}

This is the response I get. If I put the parameter in the URL, it works.

{
  "httpStatus": 500,
  "appErrorId": 0,
  "message": "Required String parameter 'hdfsLocation' is not present",
  "trackingId": "8c6d45fd-2da5-47ea-a213-3d4ea5764681"
}

Any idea what I am doing wrong?

Thanks, Serban

try to change your return type

Make
– Make

2015-08-24 08:19:45 +00:00
Commented Aug 24, 2015 at 8:19 — Make
– Make, Commented Aug 24, 2015 at 8:19
can you remove the content-type and try

kiruba
– kiruba

2015-08-24 08:28:10 +00:00
Commented Aug 24, 2015 at 8:28 — kiruba
– kiruba, Commented Aug 24, 2015 at 8:28

Karthik R · Accepted Answer · 2015-08-24 08:38:57Z

1

Looks like you have confused @RequestBody with @RequestParam. Do either of following :

Pass the request param as a request param(not as a body). Like, (encoded)

http://example.com?hdfsLocation=http%3A%2F%2Fexample.com%3FhdfsLocation%3Dhdfs%3A%2F%2F145.160.10.10%3A8020
Replace the @RequestParam with @RequestBody. If you are sending a body, don't send it along with request param. Those are two different things.

I guess you over looked :)

answered Aug 24, 2015 at 8:38

Karthik R

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Comments

aasu · Accepted Answer · 2015-08-24 08:44:36Z

1

Shouldn't it be @RequestBody instead of @RequestParam? Also, even after using @RequestBody, the whole of the JSON string: { "hdfsLocation" : "hdfs://145.160.10.10:8020" } will be the value of String hdfsLocation and not just the hdfs url. Hence, you'll have to JSON parse that JSON by yourself to get just the hdfs url.

edited Aug 24, 2015 at 8:44

answered Aug 24, 2015 at 8:23

aasu

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