Utf8FrameValidator.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.codec.http.websocketx;

import io.netty.buffer.ByteBuf;
import io.netty.channel.ChannelFutureListener;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelInboundHandlerAdapter;

/**
 *
 */
public class Utf8FrameValidator extends ChannelInboundHandlerAdapter {

    private final boolean closeOnProtocolViolation;

    private int fragmentedFramesCount;
    private Utf8Validator utf8Validator;

    public Utf8FrameValidator() {
        this(true);
    }

    public Utf8FrameValidator(boolean closeOnProtocolViolation) {
        this.closeOnProtocolViolation = closeOnProtocolViolation;
    }

    // See https://datatracker.ietf.org/doc/html/rfc6455#section-5.5.
    private static boolean isControlFrame(WebSocketFrame frame) {
        return frame instanceof CloseWebSocketFrame ||
                frame instanceof PingWebSocketFrame ||
                frame instanceof PongWebSocketFrame;
    }

    @Override
    public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
        if (msg instanceof WebSocketFrame) {
            WebSocketFrame frame = (WebSocketFrame) msg;

            try {
                // Processing for possible fragmented messages for text and binary
                // frames
                if (frame.isFinalFragment()) {
                    // Control frames are allowed between fragments
                    // See https://datatracker.ietf.org/doc/html/rfc6455#section-5.5.
                    if (!isControlFrame(frame)) {

// ... (70 more lines)