소셜 로그인 테스트(naver)

<LoginController.java>

 

@Controller
public class LoginController {
    
    /**
     * Simply selects the home view to render by returning its name.
     */
    @RequestMapping("/naverlogin")
    public String login() {
    
        return "naverlogin";
    }
    
    @RequestMapping("/callback")
    public String naver() {
    
        return "callback";
    }
    
    @RequestMapping(value = "/personalInfo")
    public void personalInfo(HttpServletRequest request) throws Exception {
            String token = "ACCESS_TOKEN";
            // 네이버 로그인 접근 토큰; 복사한 토큰값 넣기!! 유효시간은 1시간
            String header = "Bearer " + token; // Bearer 다음에 공백 추가
            try {
                String apiURL = "https://openapi.naver.com/v1/nid/me";
                URL url = new URL(apiURL);
                HttpURLConnection con = (HttpURLConnection)url.openConnection();
                con.setRequestMethod("GET");
                con.setRequestProperty("Authorization", header);
                int responseCode = con.getResponseCode();
                BufferedReader br;
                if(responseCode==200) { // 정상 호출
                    br = new BufferedReader(new InputStreamReader(con.getInputStream()));
                } else {  // 에러 발생
                    br = new BufferedReader(new InputStreamReader(con.getErrorStream()));
                }
                String inputLine;
                StringBuffer response = new StringBuffer();
                while ((inputLine = br.readLine()) != null) {
                    response.append(inputLine);
                }
                br.close();
                System.out.println(response.toString());
            } catch (Exception e) {
                System.out.println(e);
            }
     }
 }

 

 

<ApiExamMemberProfile.java>

 

package profile;
 
import java.io.*;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.HashMap;
import java.util.Map;
 
public class ApiExamMemberProfile {
 
    public static void main(String[] args) {
        String token = "ACCESS_TOKEN"; // 네이버 로그인 접근 토큰;
        String header = "Bearer " + token; // Bearer 다음에 공백 추가
 
        String apiURL = "https://openapi.naver.com/v1/nid/me";
 
        Map<String, String> requestHeaders = new HashMap<>();
        requestHeaders.put("Authorization", header);
        String responseBody = get(apiURL,requestHeaders);
 
        System.out.println(responseBody);
    }
 
    private static String get(String apiUrl, Map<String, String> requestHeaders){
        HttpURLConnection con = connect(apiUrl);
        try {
            con.setRequestMethod("GET");
            for(Map.Entry<String, String> header :requestHeaders.entrySet()) {
                con.setRequestProperty(header.getKey(), header.getValue());
            }
 
            int responseCode = con.getResponseCode();
            if (responseCode == HttpURLConnection.HTTP_OK) { // 정상 호출
                return readBody(con.getInputStream());
            } else { // 에러 발생
                return readBody(con.getErrorStream());
            }
        } catch (IOException e) {
            throw new RuntimeException("API 요청과 응답 실패", e);
        } finally {
            con.disconnect();
        }
    }
 
    private static HttpURLConnection connect(String apiUrl){
        try {
            URL url = new URL(apiUrl);
            return (HttpURLConnection)url.openConnection();
        } catch (MalformedURLException e) {
            throw new RuntimeException("API URL이 잘못되었습니다. : " + apiUrl, e);
        } catch (IOException e) {
            throw new RuntimeException("연결이 실패했습니다. : " + apiUrl, e);
        }
    }
 
    private static String readBody(InputStream body){
        InputStreamReader streamReader = new InputStreamReader(body);
 
        try (BufferedReader lineReader = new BufferedReader(streamReader)) {
            StringBuilder responseBody = new StringBuilder();
 
            String line;
            while ((line = lineReader.readLine()) != null) {
                responseBody.append(line);
            }
 
            return responseBody.toString();
        } catch (IOException e) {
            throw new RuntimeException("API 응답을 읽는데 실패했습니다.", e);
        }
    }
}

 

 

<naverlogin.jsp>

 

<%@ page import="java.net.URLEncoder" %>
<%@ page import="java.security.SecureRandom" %>
<%@ page import="java.math.BigInteger" %>
<%@ page contentType="text/html;charset=EUC-KR" language="java" %>
<html>
  <head>
    <title>네이버로그인</title>
  </head>
  <body>
  <%
    String clientId = "KwgUKONrgYCsPmHIDvqk";//애플리케이션 클라이언트 아이디값";
    String redirectURI = URLEncoder.encode("http://localhost:8282/login/callback", "EUC-KR");
    SecureRandom random = new SecureRandom();
    String state = new BigInteger(130, random).toString();
    String apiURL = "https://nid.naver.com/oauth2.0/authorize?response_type=code";
    apiURL += "&client_id=" + clientId;
    apiURL += "&redirect_uri=" + redirectURI;
    apiURL += "&state=" + state;
    session.setAttribute("state", state);
 %>
  <a href="<%=apiURL%>"><img height="50" src="http://static.nid.naver.com/oauth/small_g_in.PNG"/></a>
  </body>
</html>

 

 

<callback.java>

 

<%@ page import="java.net.URLEncoder" %>
<%@ page import="java.net.URL" %>
<%@ page import="java.net.HttpURLConnection" %>
<%@ page import="java.io.BufferedReader" %>
<%@ page import="java.io.InputStreamReader" %>
<%@ page contentType="text/html;charset=EUC-KR" language="java" %>
<html>
  <head>
    <title>네이버로그인</title>
  </head>
  <body>
  <%
    String clientId = "KwgUKONrgYCsPmHIDvqk";//애플리케이션 클라이언트 아이디값";
    String clientSecret = "zy7IYYoUrI";//애플리케이션 클라이언트 시크릿값";
    String code = request.getParameter("code");
    String state = request.getParameter("state");
    String redirectURI = URLEncoder.encode("http://localhost:8282/login/callback", "EUC-KR");
    String apiURL;
    apiURL = "https://nid.naver.com/oauth2.0/token?grant_type=authorization_code&";
    apiURL += "client_id=" + clientId;
    apiURL += "&client_secret=" + clientSecret;
    apiURL += "&redirect_uri=" + redirectURI;
    apiURL += "&code=" + code;
    apiURL += "&state=" + state;
    String access_token = "";
    String refresh_token = "";
    System.out.println("apiURL="+apiURL);
    try {
      URL url = new URL(apiURL);
      HttpURLConnection con = (HttpURLConnection)url.openConnection();
      con.setRequestMethod("GET");
      int responseCode = con.getResponseCode();
      BufferedReader br;
      System.out.print("responseCode="+responseCode);
      if(responseCode==200) { // 정상 호출
        br = new BufferedReader(new InputStreamReader(con.getInputStream()));
      } else {  // 에러 발생
        br = new BufferedReader(new InputStreamReader(con.getErrorStream()));
      }
      String inputLine;
      StringBuffer res = new StringBuffer();
      while ((inputLine = br.readLine()) != null) {
        res.append(inputLine);
      }
      br.close();
      if(responseCode==200) {
        out.println(res.toString());
      }
    } catch (Exception e) {
      System.out.println(e);
    }
  %>
  </body>
</html>

 

 

<구현 화면>

 

 

<access_token의 유효시간은 60분이므로, 1시간 경과 후에는 토큰 재발급 필요!!>

 

 

</personalInfo 주소로 유입하면 404에러와 함께 console창에 로그인 정보를 출력>