package org.jboss.resteasy.examples.resteasy;
import org.jboss.resteasy.client.ClientResponse;
import org.jboss.resteasy.spi.interception.ClientExecutionContext;
import org.jboss.resteasy.spi.interception.ClientExecutionInterceptor;
import org.jboss.resteasy.util.DateUtil;
import org.jboss.resteasy.util.HttpHeaderNames;
import javax.ws.rs.core.MultivaluedMap;
import java.util.Calendar;
import java.util.Date;
public class ForceCachingExecutionInterceptor implements
ClientExecutionInterceptor
{
private int minutes;
public ForceCachingExecutionInterceptor(int minutes)
{
this.minutes = minutes;
}
@SuppressWarnings("unchecked")
public ClientResponse execute(ClientExecutionContext ctx) throws Exception
{
ClientResponse resp = ctx.proceed();
MultivaluedMap<String, String> headers = resp.getHeaders();
String date = headers.getFirst(HttpHeaderNames.DATE);
if (date != null && headers.getFirst(HttpHeaderNames.EXPIRES) == null)
{
Calendar cal = Calendar.getInstance();
cal.setTime(DateUtil.parseDate(date));
cal.add(Calendar.MINUTE, minutes);
Date future = cal.getTime();
headers.add(HttpHeaderNames.EXPIRES, DateUtil.formatDate(future));
}
return resp;
}
}