spring mvc : HttpServletRequest 사용

2021-03-29 19:11:09 +09:00
parent 45e1e78527
commit 8f721ed0a4
1 changed files with 97 additions and 0 deletions
--- a/spring-mvc/servlet/src/main/java/com/example/servlet/basic/request/RequestHeaderServlet.java
+++ b/spring-mvc/servlet/src/main/java/com/example/servlet/basic/request/RequestHeaderServlet.java
@@ -0,0 +1,97 @@
+package com.example.servlet.basic.request;
+
+import javax.servlet.ServletException;
+import javax.servlet.annotation.WebServlet;
+import javax.servlet.http.Cookie;
+import javax.servlet.http.HttpServlet;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import java.io.IOException;
+
+@WebServlet("/request-header")
+public class RequestHeaderServlet extends HttpServlet {
+
+    @Override
+    protected void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
+        printStartLine(request);
+        printHeaders(request);
+        printHeaderUtils(request);
+        printEtc(request);
+        response.getWriter().write("ok");
+    }
+
+    //start line 정보
+    private void printStartLine(HttpServletRequest request) {
+        System.out.println("--- REQUEST-LINE - start ---");
+        System.out.println("request.getMethod() = " + request.getMethod()); // GET
+        System.out.println("request.getProtocal() = " + request.getProtocol()); // HTTP/1.1
+        System.out.println("request.getScheme() = " + request.getScheme()); // http
+        // http://localhost:8080/request-header
+        System.out.println("request.getRequestURL() = " + request.getRequestURL()); // /request-test
+        System.out.println("request.getRequestURI() = " + request.getRequestURI()); //username=hi
+        System.out.println("request.getQueryString() = " + request.getQueryString());
+        System.out.println("request.isSecure() = " + request.isSecure()); //https 사용 유무
+        System.out.println("--- REQUEST-LINE - end ---");
+        System.out.println();
+    }
+
+    //Header 모든 정보
+    private void printHeaders(HttpServletRequest request) {
+        System.out.println("--- Headers - start ---");
+        /*
+         Enumeration<String> headerNames = request.getHeaderNames();
+         while (headerNames.hasMoreElements()) {
+             String headerName = headerNames.nextElement();
+             System.out.println(headerName + ": " + request.getHeader(headerName));
+         }
+        */
+        request.getHeaderNames().asIterator()
+                .forEachRemaining(headerName -> System.out.println(headerName + ": " + request.getHeader(headerName)));
+        System.out.println("--- Headers - end ---");
+        System.out.println();
+    }
+
+    //Header 편리한 조회
+    private void printHeaderUtils(HttpServletRequest request) {
+        System.out.println("--- Header 편의 조회 start ---");
+        System.out.println("[Host 편의 조회]");
+        System.out.println("request.getServerName() = " + request.getServerName()); //Host 헤더
+        System.out.println("request.getServerPort() = " + request.getServerPort()); //Host 헤더
+        System.out.println();
+        System.out.println("[Accept-Language 편의 조회]");
+        request.getLocales().asIterator()
+                .forEachRemaining(locale -> System.out.println("locale = " + locale));
+        System.out.println("request.getLocale() = " + request.getLocale());
+        System.out.println();
+        System.out.println("[cookie 편의 조회]");
+        if (request.getCookies() != null) {
+            for (Cookie cookie : request.getCookies()) {
+                System.out.println(cookie.getName() + ": " + cookie.getValue());
+            }
+        }
+        System.out.println();
+        System.out.println("[Content 편의 조회]");
+        System.out.println("request.getContentType() = " + request.getContentType());
+        System.out.println("request.getContentLength() = " + request.getContentLength());
+        System.out.println("request.getCharacterEncoding() = " + request.getCharacterEncoding());
+        System.out.println("--- Header 편의 조회 end ---");
+        System.out.println();
+    }
+
+    //기타 정보
+    private void printEtc(HttpServletRequest request) {
+        System.out.println("--- 기타 조회 start ---");
+        System.out.println("[Remote 정보]");
+        System.out.println("request.getRemoteHost() = " + request.getRemoteHost()); //
+        System.out.println("request.getRemoteAddr() = " + request.getRemoteAddr()); //
+        System.out.println("request.getRemotePort() = " + request.getRemotePort()); //
+        System.out.println();
+        System.out.println("[Local 정보]");
+        System.out.println("request.getLocalName() = " + request.getLocalName()); //
+        System.out.println("request.getLocalAddr() = " + request.getLocalAddr()); //
+        System.out.println("request.getLocalPort() = " + request.getLocalPort()); //
+        System.out.println("--- 기타 조회 end ---");
+        System.out.println();
+    }
+}
+