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[study]이론정리/Spring Boot

Spring MVC - 요청헤더값 얻기

by yoon9i 2024. 7. 2.

5> 요청헤더값 얻기
==> 헤더의 name 값은 기본적으로 대소문자 구별안함.

  # 모든 요청헤더값 얻기

    // 요청헤더값 전부 얻기
    @GetMapping("/header1")
    public String header1(HttpServletRequest request) {
      Enumeration<String> names = request.getHeaderNames();
      
      while(names.hasMoreElements()) {
        String name = names.nextElement();
        String value = request.getHeader(name);
        
        logger.info("logger: header name:{}, header value:{}", name, value);
        // logger: header name:cookie, header value:JSESSIONID=8C20A274A3D0B528DFDE925303AB8AB3
      }
      
      return "hello";
    }

  # 특정 헤더값 얻기

   // 특정헤더값 얻기
    // 대소문자 구별안함. 
    // (ex) Accept 와 accept 는 동일한 name 으로 처리됨.
    @GetMapping("/header")
    public String header(@RequestHeader("user-agent") String x,
              @RequestHeader("Accept-language") String x2,
              @RequestHeader("Accept") String x3) {
      
      logger.info("logger: user-agent:{}, accept-language:{}, accept:{}", x, x2, x3);
      
      
      return "hello";
    }

 

package com.exam;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;


@SpringBootApplication
public class Application {

	public static void main(String[] args) {
		SpringApplication.run(Application.class, args);
	}
}
package com.exam.controller;

import java.util.Enumeration;

import javax.servlet.http.HttpServletRequest;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestHeader;

@Controller
public class MainController {
	
	Logger logger = LoggerFactory.getLogger(getClass());
	
	// 요청헤더값 전부 얻기
	@GetMapping("/header1")
	public String header1(HttpServletRequest request) {
		Enumeration<String> names = request.getHeaderNames();
		
		while(names.hasMoreElements()) {
			String name = names.nextElement();
			String value = request.getHeader(name);
			
			logger.info("logger: header name:{}, header value:{}", name, value);
			// logger: header name:cookie, header value:JSESSIONID=8C20A274A3D0B528DFDE925303AB8AB3
		}
		
		return "hello";
	}
	
	// 특정헤더값 얻기
	// 대소문자 구별안함. 
	// (ex) Accept 와 accept 는 동일한 name 으로 처리됨.
	@GetMapping("/header")
	public String header(@RequestHeader("user-agent") String x,
						 @RequestHeader("Accept-language") String x2,
						 @RequestHeader("Accept") String x3) {
		
		logger.info("logger: user-agent:{}, accept-language:{}, accept:{}", x, x2, x3);
		
		
		return "hello";
	}
}
<%@ page 
         contentType="text/html; charset=UTF-8"
         pageEncoding="UTF-8"        
%>

<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
<p>안녕하세요</p>
<p>Hello</p>
</body>
</html>
# application.properties
logging.level.org.springframework=info

# tomcat port 번호 변경
server.port=8090

# context 명 변경
server.servlet.context-path=/app

# jsp의 경로와 확장자 지정
spring.mvc.view.prefix=/WEB-INF/views/
spring.mvc.view.suffix=.jsp


spring.mvc.pathmatch.matching-strategy=ant-path-matcher
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 
	http://maven.apache.org/xsd/maven-4.0.0.xsd">
	<modelVersion>4.0.0</modelVersion>
	<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>2.7.18</version>
		<relativePath/> <!-- lookup parent from repository -->
	</parent>
	<groupId>com.exam</groupId>
	<artifactId>demo</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<name>demo</name>
	<description>Demo project for Spring Boot</description>
	<properties>
		<java.version>11</java.version>
	</properties>
	<dependencies>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-web</artifactId>
		</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-devtools -->
		<dependency>
		    <groupId>org.springframework.boot</groupId>
		    <artifactId>spring-boot-devtools</artifactId>
		</dependency>
	<dependency>
		<groupId>org.apache.tomcat.embed</groupId>
		<artifactId>tomcat-embed-jasper</artifactId>
		<scope>provided</scope>
	</dependency> 
	<dependency>
		<groupId>javax.servlet</groupId>
		<artifactId>jstl</artifactId>
	</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-test</artifactId>
			<scope>test</scope>
		</dependency>
	</dependencies>

	<build>
		<plugins>
			<plugin>
				<groupId>org.springframework.boot</groupId>
				<artifactId>spring-boot-maven-plugin</artifactId>
			</plugin>
		</plugins>
	</build>

</project>

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