package io.undertow.server.handlers;
import java.io.IOException;
import io.undertow.UndertowLogger;
import io.undertow.io.IoCallback;
import io.undertow.io.Sender;
import io.undertow.predicate.Predicate;
import io.undertow.predicate.Predicates;
import io.undertow.server.protocol.http.HttpContinue;
import io.undertow.server.HttpHandler;
import io.undertow.server.HttpServerExchange;
/**
* Handler that provides support for HTTP/1.1 continue responses.
* <p/>
* If the provided predicate returns <code>true</code> then the request will be
* accepted, otherwise it will be rejected.
*
* If no predicate is supplied then all requests will be accepted.
*
* @see io.undertow.server.protocol.http.HttpContinue
* @author Stuart Douglas
*/
public class HttpContinueAcceptingHandler implements HttpHandler {
private final HttpHandler next;
private final Predicate accept;
public HttpContinueAcceptingHandler(HttpHandler next, Predicate accept) {
this.next = next;
this.accept = accept;
}
public HttpContinueAcceptingHandler(HttpHandler next) {
this(next, Predicates.truePredicate());
}
@Override
public void handleRequest(final HttpServerExchange exchange) throws Exception {
if(HttpContinue.requiresContinueResponse(exchange)) {
if(accept.resolve(exchange)) {
HttpContinue.sendContinueResponse(exchange, new IoCallback() {
@Override
public void onComplete(final HttpServerExchange exchange, final Sender sender) {
exchange.dispatch(next);
}
@Override
public void onException(final HttpServerExchange exchange, final Sender sender, final IOException exception) {
UndertowLogger.REQUEST_IO_LOGGER.ioException(exception);
exchange.endExchange();
}
});
} else {
HttpContinue.rejectExchange(exchange);
}
} else {
next.handleRequest(exchange);
}
}
}