Apache Tomcat CORS설정

http://tomcat.apache.org/tomcat-7.0-doc/config/filter.html#CORS_Filter

오픈api개발하다보면 발생할 수 있는 크로스도메인 에러

Access to Script at '서버에 요청 한 url' from origin '요청자의 도메인' has been blocked by CORS policy: No "Access-Control-Allow-Origin' header is present on the requested resource. Origin '요청자의 도메인' is therefore not allowed access. 

네이버검색하면 SpringFramework을 통한 CORS설정이 대부분인데, 현재환경이 스프링이 아니라서..

더 찾아보다가 tomcat에서 지원하는 filter을 설정하면 된다는 정보를 보고 설정해봤다.

http://tomcat.apache.org/tomcat-7.0-doc/config/filter.html#CORS_Filter

WebProject내 web.xml파일에 필터 추가 후 테스트해봤더니 잘 되는것을 확인했다. 는 개뿔  PUT이 안먹어서 고급설정으로 바꿈

<filter>
  <filter-name>CorsFilter</filter-name>
  <filter-class>org.apache.catalina.filters.CorsFilter</filter-class>
</filter>
<filter-mapping>
  <filter-name>CorsFilter</filter-name>
  <url-pattern>/*</url-pattern>
</filter-mapping>

고급설정시 

<filter>
  <filter-name>CorsFilter</filter-name>
  <filter-class>org.apache.catalina.filters.CorsFilter</filter-class>
  <init-param>
    <param-name>cors.allowed.origins</param-name>
    <param-value>*</param-value>
  </init-param>
  <init-param>
    <param-name>cors.allowed.methods</param-name>
    <param-value>GET,POST,HEAD,OPTIONS,PUT,DELETE</param-value>
  </init-param>
  <init-param>
    <param-name>cors.allowed.headers</param-name>
    <param-value>Content-Type,X-Requested-With,accept,Origin,Access-Control-Request-Method,Access-Control-Request-Headers</param-value>
  </init-param>
  <init-param>
    <param-name>cors.exposed.headers</param-name>
    <param-value>Access-Control-Allow-Origin,Access-Control-Allow-Credentials</param-value>
  </init-param>
  <init-param>
    <param-name>cors.support.credentials</param-name>
    <param-value>true</param-value>
  </init-param>
  <init-param>
    <param-name>cors.preflight.maxage</param-name>
    <param-value>10</param-value>
  </init-param>
</filter>
<filter-mapping>
  <filter-name>CorsFilter</filter-name>
  <url-pattern>/*</url-pattern>
</filter-mapping>

설정방법은 문서를 확인해야 할듯.