我如何在春季从curl -X请求获取参数？

Question

I have a problem with processing params from curl request to my spring-boot app.

My controller post method:

@RequestMapping(value = "/cat", method = RequestMethod.POST, consumes = MediaType.APPLICATION_FORM_URLENCODED_VALUE)
public ResponseEntity addCat(@Valid @ModelAttribute NewCatRequest newCatRequest, BindingResult bindingResult) {
    System.out.println( newCatRequest);
    if (bindingResult.hasErrors()) {
        return ResponseEntity.badRequest().body(bindingResult.getFieldError().getDefaultMessage());
    }

    int rowsAffected = catsRepository.saveCat(newCatRequest.getName(), newCatRequest.getColor(), newCatRequest.getTail_length(), newCatRequest.getWhiskers_length());
    if (rowsAffected == 1) {
        return ResponseEntity.ok().body(newCatRequest);
    } else {
        return ResponseEntity.badRequest().body("There was an unexpected error while trying to create cat for you :(");
    }
}

And the problem is: when i'm trying to send this with curl:

curl -X POST http://localhost:8080/cat \\ -d "{\\"name\\": \\"Tihon\\", \\"color\\": \\"red & white\\", \\"tail_length\\": 15, \\"whiskers_length\\": 12}"

I have all null params in 'newCatRequest': NewCatRequest{name='null', color='null', tail_length=0, whiskers_length=0}

BUT when i'm trying to do the same with Postman (POST method, x-www-form-urlencoded in body with my params) i have a valid result: Result from Postman

Help me pls to understand what's the problem.

Answer 1

you can use the code option below send button in postman to generate the exact curl request which will work for you https://i.stack.imgur.com/hbk8M.png in code drop down menu search for curl and it will generate a neat and clean curl request for you . Hope this helps

Answer 2

Try this:

curl -X POST \
  http://localhost:8080/cat \
  -H 'Content-Type: application/x-www-form-urlencoded' \
  -d 'name=Thidon&color=red%20%26%20white&tail_length=15&whiskers_length=12'

You forgot the header application/x-www-form-urlencoded and the body should not be in json format.

Answer 3

curl -X POST http://localhost:8080/cat \
     -d "{\"name\": \"Tihon\", \"color\": \"red & white\", \"tail_length\": 15, \"whiskers_length\": 12}"

The above curl request has a JSON body, whereas your request processing method

@RequestMapping(value = "/cat", method = RequestMethod.POST, consumes = MediaType.APPLICATION_FORM_URLENCODED_VALUE)

consumes/accepts: application/x-www-form-urlencoded . Therefore, you should either convert your method to consume/accept application/json or change your curl request to:

curl -X POST http://localhost:8080/cat \
     -d 'name=Tihon&color=red%20%26%20white&tail_length=15&whiskers_length= 12' \
     -H 'Content-Type: application/x-www-form-urlencoded'

EDIT 1

Please note that the default Content-Type for curl is application/x-www-form-urlencoded . To use JSON, change your request to:

curl -X POST http://localhost:8080/cat \
     -d "{\"name\": \"Tihon\", \"color\": \"red & white\", \"tail_length\": 15, \"whiskers_length\": 12}" \
     -H 'Content-Type: application/json'