HttpProxyHandler.java — netty Source File

Source Code

/*
 * Copyright 2014 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.proxy;

import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelInboundHandler;
import io.netty.channel.ChannelOutboundHandler;
import io.netty.channel.ChannelPipeline;
import io.netty.channel.ChannelPromise;
import io.netty.handler.codec.base64.Base64;
import io.netty.handler.codec.http.DefaultFullHttpRequest;
import io.netty.handler.codec.http.FullHttpRequest;
import io.netty.handler.codec.http.HttpClientCodec;
import io.netty.handler.codec.http.HttpHeaderNames;
import io.netty.handler.codec.http.HttpHeaders;
import io.netty.handler.codec.http.DefaultHttpHeadersFactory;
import io.netty.handler.codec.http.HttpHeadersFactory;
import io.netty.handler.codec.http.HttpMethod;
import io.netty.handler.codec.http.HttpResponse;
import io.netty.handler.codec.http.HttpResponseStatus;
import io.netty.handler.codec.http.HttpUtil;
import io.netty.handler.codec.http.HttpVersion;
import io.netty.handler.codec.http.LastHttpContent;
import io.netty.util.AsciiString;
import io.netty.util.CharsetUtil;
import io.netty.util.internal.ObjectUtil;

import java.net.InetSocketAddress;
import java.net.SocketAddress;

/**
 * Handler that establishes a blind forwarding proxy tunnel using
 * <a href="https://datatracker.ietf.org/doc/html/rfc7231#section-4.3.6">HTTP/1.1 CONNECT</a> request. It can be used to
 * establish plaintext or secure tunnels.
 * <p>
 * HTTP users who need to connect to a
 * <a href="https://datatracker.ietf.org/doc/html/rfc7230#page-10">message-forwarding HTTP proxy agent</a> instead of a
 * tunneling proxy should not use this handler.
 */
public final class HttpProxyHandler extends ProxyHandler {

    private static final String PROTOCOL = "http";
    private static final String AUTH_BASIC = "basic";

// ... (285 more lines)