[FIXED] how to send a single String to a RestAPI endpoint using CURL

Issue

I have a @RestController with an endpoint that receives a single String :

@RestController
public class ScriptController {

private Logger logger = LoggerFactory.getLogger(ScriptController.class);

public ScriptController(Engine engine) {
    this.engine = engine;
}

@RequestMapping(value = "/run", method = RequestMethod.POST)
public Object run(@RequestBody String script){
    return engine.run(script);
}
}

when I send a request to this endpoint using CURL :

curl --request POST localhost:9999/run --data-binary "testObj.hi()"

I am not receiving the exact String ("testObj.hi()") in the Controller, instead I receive the following one :

testObj.hi%28%29= 

what is the problem?

when I change the method from POST to GET (in both sides) it works! but I want to use POST method.

Solution

By default, the request body is URL encoded in HTTP requests, and since there is no content-type header, spring boot doesn't decode the encoded characters.

Specifying Content-Type header will solve the problem, something like this:

curl --request POST localhost:8080/run --data-binary "testObj.hi()" -H 'Content-Type: text/utf-8'

It works in case of GET requests because parameters are expected to be URL encoded in case of GET request and they are decoded by the spring.

Answered By - Saheb