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 * Copyright 2014 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 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.HeaderValues;
import io.undertow.util.Headers;
import io.undertow.util.Methods;

A handler that handles HTTP trace requests
Author:Stuart Douglas
/** * A handler that handles HTTP trace requests * * @author Stuart Douglas */
public class HttpTraceHandler implements HttpHandler { private final HttpHandler handler; public HttpTraceHandler(final HttpHandler handler) { this.handler = handler; } @Override public void handleRequest(final HttpServerExchange exchange) throws Exception { if(exchange.getRequestMethod().equals(Methods.TRACE)) { exchange.getResponseHeaders().put(Headers.CONTENT_TYPE, "message/http"); StringBuilder body = new StringBuilder("TRACE "); body.append(exchange.getRequestURI()); if(!exchange.getQueryString().isEmpty()) { body.append('?'); body.append(exchange.getQueryString()); } body.append(' '); body.append(exchange.getProtocol().toString()); body.append("\r\n"); for(HeaderValues header : exchange.getRequestHeaders()) { for(String value : header) { body.append(header.getHeaderName()); body.append(": "); body.append(value); body.append("\r\n"); } } body.append("\r\n"); exchange.getResponseSender().send(body.toString()); } else { handler.handleRequest(exchange); } } @Override public String toString() { return "trace()"; } public static class Builder implements HandlerBuilder { @Override public String name() { return "trace"; } @Override public Map<String, Class<?>> parameters() { return Collections.emptyMap(); } @Override public Set<String> requiredParameters() { return Collections.emptySet(); } @Override public String defaultParameter() { return null; } @Override public HandlerWrapper build(Map<String, Object> config) { return new Wrapper(); } } private static class Wrapper implements HandlerWrapper { @Override public HttpHandler wrap(HttpHandler handler) { return new HttpTraceHandler(handler); } } }