io.undertow.server.handlers.SetErrorHandler Maven / Gradle / Ivy
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* Copyright 2020 Red Hat, Inc., and individual contributors
* as indicated by the @author tags.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
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* See the License for the specific language governing permissions and
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*/
package io.undertow.server.handlers;
import io.undertow.server.HandlerWrapper;
import io.undertow.server.HttpHandler;
import io.undertow.server.HttpServerExchange;
import io.undertow.server.handlers.builder.HandlerBuilder;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;
/**
* A handler that sets response code but continues the exchange so the servlet's
* error page can be returned.
*
* @author Brad Wood
*/
public class SetErrorHandler implements HttpHandler {
private final int responseCode;
private final HttpHandler next;
/**
* Construct a new instance.
*
* @param responseCode the response code to set
*/
public SetErrorHandler(HttpHandler next, final int responseCode) {
this.next = next;
this.responseCode = responseCode;
}
@Override
public void handleRequest(final HttpServerExchange exchange) throws Exception {
exchange.setStatusCode(responseCode);
next.handleRequest(exchange);
}
@Override
public String toString() {
return "set-error( " + responseCode + " )";
}
public static class Builder implements HandlerBuilder {
@Override
public String name() {
return "set-error";
}
@Override
public Map> parameters() {
Map> params = new HashMap<>();
params.put("response-code", Integer.class);
return params;
}
@Override
public Set requiredParameters() {
final Set req = new HashSet<>();
req.add("response-code");
return req;
}
@Override
public String defaultParameter() {
return "response-code";
}
@Override
public HandlerWrapper build(Map config) {
return new Wrapper((Integer) config.get("response-code"));
}
}
private static class Wrapper implements HandlerWrapper {
private final Integer responseCode;
private Wrapper(Integer responseCode) {
this.responseCode = responseCode;
}
@Override
public HttpHandler wrap(HttpHandler handler) {
return new SetErrorHandler(handler, responseCode);
}
}
}