CODEWITHSUNDEEP
javaspringrestpost
BD111
BD111

Reputation: 201

POST doesn't work Spring java

I have an web application and I'm trying to creat a simple POSt method that will have a value inside the body request:

@RequestMapping(value = "/cachettl", method = RequestMethod.POST)
@CrossOrigin(origins = "http://localhost:3000")
public @ResponseBody String updateTtl(@RequestBody long ttl) {
  /////Code
}

My request which I call from some rest client is:

POST
http://localhost:8080/cachettl
Body:
{
 "ttl": 5
}

POST In the response I get 403 error "THE TYPE OF THE RESPONSE BODY IS UNKNOWN The server did not provide the mandatory "Content-type" header." Why is that happening? I mention that other GET requests are working perfectly. Thanks!

Edit: When I tried it with postman the error message I got is "Invalid CORS request".

Upvotes: 1

Views: 1659

Answers (3)

Andy Brown
Andy Brown

Reputation: 13029

The error message is slightly misleading. Your server code is not being hit due an authentication error.

Since you say spring-security is not in play then I suspect you're being bounced by a CORS violation maybe due to a request method restriction. The response body generated by this failure (if any at all) is automatic and will not be of the application/json type hence the client failure. I suspect if you hit the endpoint with something that doesn't care for CORS such as curl then it will work.

Does your browser REST client allow you to introspect the CORS preflight requests to see what it's asking for?

Upvotes: 0

Pospolita Nikita
Pospolita Nikita

Reputation: 665

Spring application just doesn't know how to parse your message's body. You should provide "header" for your POST request to tell Spring how to parse it.

"Content-type: application/json" in your case.

You can read more about http methods here: https://developer.mozilla.org/en-US/docs/Learn/HTML/Forms/Sending_and_retrieving_form_data

Updated:

Just in case of debug, remove useless annotations to test only POST mechanism. Also, change types of arg and return type. And try to use case-sensitive header.

@RequestMapping(value = "/cachettl", method = RequestMethod.POST)
public void updateTtl(@RequestBody String ttl) {
  System.out.println("i'm working");
}

Upvotes: 1

Arnaud
Arnaud

Reputation: 17534

Since the error is about the response type, you should consider adding a produces attribute, i.e :

@RequestMapping(value = "/cachettl", method = RequestMethod.POST, produces=MediaType.APPLICATION_JSON_VALUE)

Since you are also consuming JSON, adding a consumes attribute won't hurt either :

@RequestMapping(value = "/cachettl", method = RequestMethod.POST, consumes=MediaType.APPLICATION_JSON_VALUE, produces=MediaType.APPLICATION_JSON_VALUE)

Upvotes: 0

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