HTTP 요청 메시지 (단순 텍스트)

import lombok.extern.slf4j.Slf4j;
import org.springframework.http.HttpEntity;
import org.springframework.stereotype.Controller;
import org.springframework.util.StreamUtils;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.ResponseBody;

import javax.servlet.ServletInputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.InputStream;
import java.io.Writer;
import java.nio.charset.StandardCharsets;


@Slf4j
@Controller
public class RequestBodyStringController {
    @PostMapping("/request-body-string-v1")
    public void requestBodyString(HttpServletRequest request, HttpServletResponse response) throws IOException {
        ServletInputStream inputStream = request.getInputStream();
        String messageBody = StreamUtils.copyToString(inputStream, StandardCharsets.UTF_8);
        log.info("messageBody={}", messageBody);
        response.getWriter().write("OK");

    }

    @PostMapping("/request-body-string-v2")
    public void requestBodyStringV2(InputStream inputStream, Writer responseWriter) throws IOException {

        String messageBody = StreamUtils.copyToString(inputStream, StandardCharsets.UTF_8);
        log.info("messageBody={}", messageBody);
        responseWriter.write("OK");
    }


    // HTTP header, body 정보를 편리하게 조회
    // 요청 파라미터를 조회하는 기능과 관계없음
    @PostMapping("/request-body-string-v3")
    public HttpEntity<String> requestBodyStringV3(HttpEntity<String> httpEntity) throws IOException {
        String messageBody = httpEntity.getBody();
        log.info("messageBody={}", messageBody);
        return new HttpEntity<>("ok");
    }


    @ResponseBody
    @PostMapping("/request-body-string-v4")
    public String requestBodyStringV4(@RequestBody String messageBody){

        log.info("messageBody={}", messageBody);
        return "ok";
    }
}