XUACompatibleInterceptor

XUACompatibleInterceptor.java

import java.util.regex.Pattern;

import javax.servlet.http.HttpServletResponse;

import com.rbsg.bizmon.core.constants.GUIConstants;

import org.apache.struts2.StrutsStatics;

import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionInvocation;
import com.opensymphony.xwork2.interceptor.AbstractInterceptor;

/**
 * IE Compatibility Mode - IE 7 and 8 render as IE7. IE9 renders as IE9
 */
public class XUACompatibleInterceptor extends AbstractInterceptor {

    /**
     * serialVersionUID.
     */
    private static final long serialVersionUID = -2149133042114261687L;

    private static final String CONTENT_TYPE___TEXT_HTML__REGEX = "^(?i)text/html.*";

    private static final String X_UA_COMPATIBLE = "X-UA-Compatible";

    @Override
    public String intercept(final ActionInvocation invocation) throws Exception {

        final String result = invocation.invoke();

        final ActionContext context = (ActionContext) invocation.getInvocationContext();
        final HttpServletResponse response = (HttpServletResponse) context.get(StrutsStatics.HTTP_RESPONSE);

        final String contextType = response.getContentType();

        if (checkContentType(contextType)) {
            response.setHeader(X_UA_COMPATIBLE, GUIConstants.HTTP_RESPONSE___X_UA_COMPATIBLE);
        }

        return result;
    }

    public boolean checkContentType(final String contextType) {
        return Pattern.matches(XUACompatibleInterceptor.CONTENT_TYPE___TEXT_HTML__REGEX,
                (contextType == null ? "" : contextType));
    }

}

XUACompatibleInterceptorTest.java

import static org.testng.Assert.assertFalse;
import static org.testng.Assert.assertTrue;

import org.testng.annotations.Test;

@Test(singleThreaded = true)
public class XUACompatibleInterceptorTest {

    @Test
    public void testContentTypeCheck_empty() {
        assertFalse(new XUACompatibleInterceptor().checkContentType(""));
    }

    @Test
    public void testContentTypeCheck_null() {
        assertFalse(new XUACompatibleInterceptor().checkContentType(null));
    }

    @Test
    public void testContentTypeCheck_qwerty() {
        assertFalse(new XUACompatibleInterceptor().checkContentType("qwerty"));
    }

    @Test
    public void testContentTypeCheck_qwerty_text() {
        assertFalse(new XUACompatibleInterceptor().checkContentType("qwerty text"));
    }

    @Test
    public void testContentTypeCheck_qwerty_text__html() {
        assertFalse(new XUACompatibleInterceptor().checkContentType("qwerty text html"));
    }

    @Test
    public void testContentTypeCheck_qwerty_text_html() {
        assertFalse(new XUACompatibleInterceptor().checkContentType("qwerty text/html"));
    }

    @Test
    public void testContentTypeCheck_qwerty_text_html_() {
        assertFalse(new XUACompatibleInterceptor().checkContentType("qwerty text/html;"));
    }

    @Test
    public void testContentTypeCheck_text_html() {
        assertTrue(new XUACompatibleInterceptor().checkContentType("text/html"));
    }

    @Test
    public void testContentTypeCheck_text_html_() {
        assertTrue(new XUACompatibleInterceptor().checkContentType("text/html;"));
    }

    @Test
    public void testContentTypeCheck_text_HTML_() {
        assertTrue(new XUACompatibleInterceptor().checkContentType("text/HTML;"));
    }

    @Test
    public void testContentTypeCheck_TEXT_html_() {
        assertTrue(new XUACompatibleInterceptor().checkContentType("TEXT/html;"));
    }

    @Test
    public void testContentTypeCheck_TEXT_HTML_() {
        assertTrue(new XUACompatibleInterceptor().checkContentType("TEXT/HTML;"));
    }

    @Test
    public void testContentTypeCheck_text_html_charset_UTF_8() {
        assertTrue(new XUACompatibleInterceptor().checkContentType("text/html; charset=UTF-8"));
    }

    @Test
    public void testContentTypeCheck_text_HTML_charset_UTF_8() {
        assertTrue(new XUACompatibleInterceptor().checkContentType("text/HTML; charset=UTF-8"));
    }

    @Test
    public void testContentTypeCheck_TEXT_html_charset_UTF_8() {
        assertTrue(new XUACompatibleInterceptor().checkContentType("TEXT/html; charset=UTF-8"));
    }

    @Test
    public void testContentTypeCheck_TEXT_HTML_charset_UTF_8() {
        assertTrue(new XUACompatibleInterceptor().checkContentType("TEXT/HTML; charset=UTF-8"));
    }

    @Test
    public void testContentTypeCheck_text_html_charset_UTF_8_() {
        assertTrue(new XUACompatibleInterceptor().checkContentType("text/html; charset=UTF-8;"));
    }

    @Test
    public void testContentTypeCheck_text_HTML_charset_UTF_8_() {
        assertTrue(new XUACompatibleInterceptor().checkContentType("text/HTML; charset=UTF-8;"));
    }

    @Test
    public void testContentTypeCheck_TEXT_html_charset_UTF_8_() {
        assertTrue(new XUACompatibleInterceptor().checkContentType("TEXT/html; charset=UTF-8;"));
    }

    @Test
    public void testContentTypeCheck_TEXT_HTML_charset_UTF_8_() {
        assertTrue(new XUACompatibleInterceptor().checkContentType("TEXT/HTML; charset=UTF-8;"));
    }

}