io.undertow.server.handlers.DisableCacheHandler Maven / Gradle / Ivy
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This artifact provides a single jar that contains all classes required to use remote EJB and JMS, including
all dependencies. It is intended for use by those not using maven, maven users should just import the EJB and
JMS BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up
with different versions on classes on the class path).
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package io.undertow.server.handlers;
import java.util.Collections;
import java.util.Map;
import java.util.Set;
import io.undertow.server.HandlerWrapper;
import io.undertow.server.HttpHandler;
import io.undertow.server.HttpServerExchange;
import io.undertow.server.handlers.builder.HandlerBuilder;
import io.undertow.util.Headers;
/**
*
* Handler that disables response caching by browsers and proxies.
*
*
* @author Stuart Douglas
*/
public class DisableCacheHandler implements HttpHandler {
private final HttpHandler next;
public DisableCacheHandler(HttpHandler next) {
this.next = next;
}
@Override
public void handleRequest(HttpServerExchange exchange) throws Exception {
exchange.getResponseHeaders().add(Headers.CACHE_CONTROL, "no-cache, no-store, must-revalidate");
exchange.getResponseHeaders().add(Headers.PRAGMA, "no-cache");
exchange.getResponseHeaders().add(Headers.EXPIRES, "0");
next.handleRequest(exchange);
}
@Override
public String toString() {
return "disable-cache()";
}
public static class Builder implements HandlerBuilder {
@Override
public String name() {
return "disable-cache";
}
@Override
public Map> parameters() {
return Collections.emptyMap();
}
@Override
public Set requiredParameters() {
return Collections.emptySet();
}
@Override
public String defaultParameter() {
return null;
}
@Override
public HandlerWrapper build(Map config) {
return new Wrapper();
}
}
private static class Wrapper implements HandlerWrapper {
@Override
public HttpHandler wrap(HttpHandler handler) {
return new DisableCacheHandler(handler);
}
}
}