setting content type in rest assured

Question

I'm trying to invoke a rest call using rest assured. My API accepts, "application/json" as content type and I need to set in the call. I set the content type as mentioned below.

Option 1

Response resp1 = given().log().all().header("Content-Type","application/json")
   .body(inputPayLoad).when().post(addUserUrl);
System.out.println("Status code - " +resp1.getStatusCode());

Option 2

Response resp1 = given().log().all().contentType("application/json")
   .body(inputPayLoad).when().post(addUserUrl);

The response I get is "415" (indicates that "Unsupported media type ").

I tried invoking the same api using plain java code and it works. For some mysterious reason, I cudn't get it working through RA.

    HttpClient client = new DefaultHttpClient();
    HttpPost post = new HttpPost(addUserUrl);
    StringEntity input = new StringEntity(inputPayLoad);
    input.setContentType("application/json");
    post.setEntity(input);
    HttpResponse response = client.execute(post);
    System.out.println(response.getEntity().getContent());
    /*
    BufferedReader rd = new BufferedReader(new InputStreamReader(response.getEntity().getContent()));
    String line = "";
    while ((line = rd.readLine()) != null) {
        System.out.println("Output -- " +line);
    }

Answer 1

I faced similar issue while working with rest-assured 2.7 version. I tried setting both the contentType and also accept to application/json but it didn't work. Adding carriage feed and new line characters at the end as the following worked for me.

RestAssured.given().contentType("application/json\r\n")

The API seems to be missing to add new line characters after Content-Type header due to which the server is not able to differentiate between the media type and the rest of the request content and hence throwing the error 415 - "Unsupported media type".