CorsHandler.java — netty Source File

Source Code

/*
 * Copyright 2013 The Netty Project
 *
 * The Netty Project licenses this file to you 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:
 *
 * https://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, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */
package io.netty.handler.codec.http.cors;

import io.netty.buffer.Unpooled;
import io.netty.channel.ChannelDuplexHandler;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelFutureListener;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelPromise;
import io.netty.handler.codec.http.DefaultFullHttpResponse;
import io.netty.handler.codec.http.HttpContent;
import io.netty.handler.codec.http.HttpHeaderNames;
import io.netty.handler.codec.http.HttpHeaderValues;
import io.netty.handler.codec.http.HttpHeaders;
import io.netty.handler.codec.http.DefaultHttpHeadersFactory;
import io.netty.handler.codec.http.HttpRequest;
import io.netty.handler.codec.http.HttpResponse;
import io.netty.handler.codec.http.HttpUtil;
import io.netty.util.ReferenceCountUtil;
import io.netty.util.internal.logging.InternalLogger;
import io.netty.util.internal.logging.InternalLoggerFactory;

import java.util.Collections;
import java.util.List;

import static io.netty.handler.codec.http.HttpMethod.OPTIONS;
import static io.netty.handler.codec.http.HttpResponseStatus.FORBIDDEN;
import static io.netty.handler.codec.http.HttpResponseStatus.OK;
import static io.netty.util.ReferenceCountUtil.release;
import static io.netty.util.internal.ObjectUtil.checkNonEmpty;
import static io.netty.util.internal.ObjectUtil.checkNotNull;

/**
 * Handles <a href="https://www.w3.org/TR/cors/">Cross Origin Resource Sharing</a> (CORS) requests.
 * <p>
 * This handler can be configured using one or more {@link CorsConfig}, please
 * refer to this class for details about the configuration options available.
 */
public class CorsHandler extends ChannelDuplexHandler {

    private static final InternalLogger logger = InternalLoggerFactory.getInstance(CorsHandler.class);
    private static final String ANY_ORIGIN = "*";
    private static final String NULL_ORIGIN = "null";
    private CorsConfig config;

    private HttpRequest request;
// ... (229 more lines)