[Web] conf/web.xml 과 WEB-INF/web.xml

web.xml ?

Web application에 대한 기본값 정의

 

WAS로 Tomcat 을 이용하면서 궁금했던 것중 하나가 tomcat/conf/web.xml 과 web application 디렉토리에 있는 WEB-INF/web.xml 이둘의 차이이다. 

 

conf/web.xml에 맨 윗부분 introduction에서 친절하게 설명은 해놓았다.

  <!-- ======================== Introduction ============================== -->
  <!-- This document defines default values for *all* web applications      -->
  <!-- loaded into this instance of Tomcat.  As each application is         -->
  <!-- deployed, this file is processed, followed by the                    -->
  <!-- "/WEB-INF/web.xml" deployment descriptor from your own               -->
  <!-- applications.                                                        -->
  <!--                                                                      -->
  <!-- WARNING:  Do not configure application-specific resources here!      -->
  <!-- They should go in the "/WEB-INF/web.xml" file in your application.   -->

 

conf/web.xml : Defines default values for all web applications loaded into this instance of Tomcat. As each application is deployed, this file is processed, followed by the "/WEB-INF/web.xml" deployment descriptor from your own applications.

 

WEB-INF/web.xml : Configure application-specific resources.

 

-> 제대로 해석이 되진 않지만.. 뉘앙스가 conf/web.xml은 default 설정인거고 WEB-INF/web.xml은 보다 구체적인 설정을 하는 곳인것 같다. 

 

 

일단 어떻게 생겨먹었는지부터 보자..

conf/web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="3.0" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee                       http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd">

    <servlet>
        <servlet-name>default</servlet-name>
        <servlet-class>org.apache.catalina.servlets.DefaultServlet</servlet-class>
        <init-param>
            <param-name>debug</param-name>
            <param-value>0</param-value>
        </init-param>
        <init-param>
            <param-name>listings</param-name>
            <param-value>false</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>

    <servlet>
        <servlet-name>jsp</servlet-name>
        <servlet-class>org.apache.jasper.servlet.JspServlet</servlet-class>
        <init-param>
            <param-name>fork</param-name>
            <param-value>false</param-value>
        </init-param>
        <init-param>
            <param-name>xpoweredBy</param-name>
            <param-value>false</param-value>
        </init-param>
        <load-on-startup>3</load-on-startup>
    </servlet>

    <!-- The mapping for the default servlet -->
    <servlet-mapping>
        <servlet-name>default</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>

    <!-- The mappings for the JSP servlet -->
    <servlet-mapping>
        <servlet-name>jsp</servlet-name>
        <url-pattern>*.jsp</url-pattern>
        <url-pattern>*.jspx</url-pattern>
    </servlet-mapping>

    <session-config>
        <session-timeout>30</session-timeout>
    </session-config>

    <mime-mapping>
        <extension>123</extension>
        <mime-type>application/vnd.lotus-1-2-3</mime-type>
    </mime-mapping>
    <mime-mapping>
        <extension>3dml</extension>
        <mime-type>text/vnd.in3d.3dml</mime-type>
    </mime-mapping>
    <mime-mapping>
        <extension>3ds</extension>
        <mime-type>image/x-3ds</mime-type>
    </mime-mapping>
    <mime-mapping>
        <extension>3g2</extension>
        <mime-type>video/3gpp2</mime-type>
    </mime-mapping>
    <mime-mapping>
        <extension>3gp</extension>
        <mime-type>video/3gpp</mime-type>
    </mime-mapping>
    <mime-mapping>
        <extension>7z</extension>
        <mime-type>application/x-7z-compressed</mime-type>
    </mime-mapping>
    <mime-mapping>
        <extension>aab</extension>
        <mime-type>application/x-authorware-bin</mime-type>
    </mime-mapping>
    <mime-mapping>
        <extension>aac</extension>
        <mime-type>audio/x-aac</mime-type>
    </mime-mapping>
    <mime-mapping>
        <extension>aam</extension>
        <mime-type>application/x-authorware-map</mime-type>
    </mime-mapping>
    <mime-mapping>
        <extension>aas</extension>
        <mime-type>application/x-authorware-seg</mime-type>
    </mime-mapping>
    <mime-mapping>
        <extension>abs</extension>
        <mime-type>audio/x-mpeg</mime-type>
    </mime-mapping>
    <mime-mapping>
        <extension>abw</extension>
        <mime-type>application/x-abiword</mime-type>
    </mime-mapping>
 
 
 <!-- 생략함 -->

    <welcome-file-list>
        <welcome-file>index.html</welcome-file>
        <welcome-file>index.htm</welcome-file>
        <welcome-file>index.jsp</welcome-file>
    </welcome-file-list>

</web-app>

우선 주석처리 되있는 부분은 모두 생략했고, mime-type 관련 설정은 너무 많아서 몇개만 추렸다. 크게 

<servlet/>, <servlet-mapping/>, <session-config/>, <mime-mapping/>, <welcome-file-list/> 

로 구성되어 있다.

• ServletContext의 초기 파라미터
• Session의 유효시간 설정
• Servlet/JSP에 대한 정의
• Servlet/JSP 매핑
• Mime Type 매핑
• Welcome File list

 WEB-INF/web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" version="2.5">
  <display-name>AUI</display-name>
  <description>AUI</description>
  <context-param>
    <param-name>webAppRootKey</param-name>
    <param-value>aui.root</param-value>
  </context-param>
  <context-param>
    <param-name>log4jConfigLocation</param-name>
    <param-value>classpath:log4j.properties</param-value>
  </context-param>
  <context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>/WEB-INF/config/context.xml</param-value>
  </context-param>
  <context-param>
    <param-name>defaultHtmlEscape</param-name>
    <param-value>false</param-value>
  </context-param>
  <listener>
    <listener-class>org.springframework.web.util.Log4jConfigListener</listener-class>
  </listener>
  <listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
  </listener>
  <listener>
    <listener-class>org.springframework.web.context.request.RequestContextListener</listener-class>
  </listener>
  <servlet>
    <servlet-name>Resource Servlet</servlet-name>
    <servlet-class>org.springframework.js.resource.ResourceServlet</servlet-class>
  </servlet>
  <servlet>
    <servlet-name>dispatcherServlet</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <init-param>
      <param-name>contextConfigLocation</param-name>
      <param-value></param-value>
    </init-param>
    <load-on-startup>1</load-on-startup>
  </servlet>
  <servlet-mapping>
    <servlet-name>Resource Servlet</servlet-name>
    <url-pattern>/resources/*</url-pattern>
  </servlet-mapping>
  <servlet-mapping>
    <servlet-name>dispatcherServlet</servlet-name>
    <url-pattern>/</url-pattern>
  </servlet-mapping>
  <servlet-mapping>
    <servlet-name>default</servlet-name>
    <url-pattern>/static/*</url-pattern>
  </servlet-mapping>
  <filter>
    <filter-name>SetCharacterEncodingFilter</filter-name>
    <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
    <init-param>
      <param-name>encoding</param-name>
      <param-value>UTF-8</param-value>
    </init-param>
    <init-param>
      <param-name>forceEncoding</param-name>
      <param-value>true</param-value>
    </init-param>
  </filter>
  <filter>
    <filter-name>springSecurityFilterChain</filter-name>
    <filter-class>org.springframework.web.filter.DelegatingFilterProxy</filter-class>
  </filter>
  <filter>
    <display-name>springMultipartFilter</display-name>
    <filter-name>springMultipartFilter</filter-name>
    <filter-class>org.springframework.web.multipart.support.MultipartFilter</filter-class>
  </filter>
  <filter>
    <filter-name>httpMethodFilter</filter-name>
    <filter-class>org.springframework.web.filter.HiddenHttpMethodFilter</filter-class>
  </filter>
  <filter>
    <filter-name>httpPutFormFilter</filter-name>
    <filter-class>org.springframework.web.filter.HttpPutFormContentFilter</filter-class>
  </filter>
  <filter>
    <filter-name>sitemesh</filter-name>
    <filter-class>com.opensymphony.module.sitemesh.filter.PageFilter</filter-class>
  </filter>
  <filter>
    <filter-name>Spring OpenEntityManagerInViewFilter</filter-name>
    <filter-class>org.springframework.orm.jpa.support.OpenEntityManagerInViewFilter</filter-class>
  </filter>
  <filter>
    <filter-name>XSS</filter-name>
    <filter-class>com.alticast.ota.filter.XSSFilter</filter-class>
  </filter>
  <filter-mapping>
    <filter-name>SetCharacterEncodingFilter</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>
  <filter-mapping>
    <filter-name>springMultipartFilter</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>
  <filter-mapping>
    <filter-name>springSecurityFilterChain</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>
  <filter-mapping>
    <filter-name>httpMethodFilter</filter-name>
    <servlet-name>dispatcherServlet</servlet-name>
  </filter-mapping>
  <filter-mapping>
    <filter-name>httpPutFormFilter</filter-name>
    <servlet-name>dispatcherServlet</servlet-name>
  </filter-mapping>
  <filter-mapping>
    <filter-name>sitemesh</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>
  <filter-mapping>
    <filter-name>Spring OpenEntityManagerInViewFilter</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>
  <filter-mapping>
    <filter-name>XSS</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>
  <session-config>
    <!-- <session-timeout>20</session-timeout> -->
    <session-timeout>60</session-timeout>
  </session-config>
  <welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
    <welcome-file>index.html</welcome-file>
  </welcome-file-list>
</web-app>

(* 위 descriptor는 예시로, WEB-INF/web.xml은 각자 web application상황에 따라 다를 수 있습니다. )

각 elements에 대한 설명은 아래 링크를 참고!

https://docs.oracle.com/cd/E17904_01/web.1111/e13712/web_xml.htm#WBAPP502