curl -d "123" : The string data has equal symbol attached to it

Issue

I have a POST API in spring boot Restcontroller which accepts a string and returns back the string. But the recieved string value has special characters as "="

@RestController
public class MyApi{
    @PostMapping(path = "/", consumes = {MediaType.APPLICATION_FORM_URLENCODED_VALUE})
    public String parseInput(@RequestBody String data)    {
        return data;
    }
}

curl -d "1" http://localhost:1337/ gives 1= instead of 1

Solution

Source : https://www.baeldung.com/spring-url-encoded-form-data#1-formhttpmessageconverter-basics

This helped me :

@PostMapping(
  path = "/feedback",
  consumes = {MediaType.APPLICATION_FORM_URLENCODED_VALUE})
public ResponseEntity<String> handleNonBrowserSubmissions(
  @RequestParam MultiValueMap<String,String> paramMap) throws Exception {
    // Save feedback data
    return new ResponseEntity<String>("Thank you for submitting feedback", HttpStatus.OK);
}

I just had to change the data type in the method argument to "@RequestParam MultiValueMap<String,String> paramMap"

---

So when I do curl -d '1' http://localhost:1337/ , I had to extract the key separately like this :

String data = (String) ((Map.Entry) paramMap.entrySet().toArray()[0]).getKey();

Answered By - Anthony Vinay