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This artifact provides a single jar that contains all classes required to use remote EJB and JMS, including all dependencies. It is intended for use by those not using maven, maven users should just import the EJB and JMS BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up with different versions on classes on the class path).

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/*
 * 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.spdy;

import io.netty.buffer.ByteBuf;
import io.netty.buffer.ByteBufAllocator;
import io.netty.channel.ChannelHandlerContext;
import io.netty.handler.codec.MessageToMessageDecoder;
import io.netty.handler.codec.TooLongFrameException;
import io.netty.handler.codec.http.DefaultFullHttpRequest;
import io.netty.handler.codec.http.DefaultFullHttpResponse;
import io.netty.handler.codec.http.FullHttpMessage;
import io.netty.handler.codec.http.FullHttpRequest;
import io.netty.handler.codec.http.FullHttpResponse;
import io.netty.handler.codec.http.HttpHeaderNames;
import io.netty.handler.codec.http.HttpUtil;
import io.netty.handler.codec.http.HttpMethod;
import io.netty.handler.codec.http.HttpResponseStatus;
import io.netty.handler.codec.http.HttpVersion;
import io.netty.handler.codec.spdy.SpdyHttpHeaders.Names;
import io.netty.util.ReferenceCountUtil;
import io.netty.util.internal.ObjectUtil;

import java.util.HashMap;
import java.util.List;
import java.util.Map;

import static io.netty.handler.codec.spdy.SpdyHeaders.HttpNames.*;
import static io.netty.util.internal.ObjectUtil.checkPositive;

/**
 * Decodes {@link SpdySynStreamFrame}s, {@link SpdySynReplyFrame}s,
 * and {@link SpdyDataFrame}s into {@link FullHttpRequest}s and {@link FullHttpResponse}s.
 */
public class SpdyHttpDecoder extends MessageToMessageDecoder {

    private final boolean validateHeaders;
    private final int spdyVersion;
    private final int maxContentLength;
    private final Map messageMap;

    /**
     * Creates a new instance.
     *
     * @param version the protocol version
     * @param maxContentLength the maximum length of the message content.
     *        If the length of the message content exceeds this value,
     *        a {@link TooLongFrameException} will be raised.
     */
    public SpdyHttpDecoder(SpdyVersion version, int maxContentLength) {
        this(version, maxContentLength, new HashMap(), true);
    }

    /**
     * Creates a new instance.
     *
     * @param version the protocol version
     * @param maxContentLength the maximum length of the message content.
     *        If the length of the message content exceeds this value,
     *        a {@link TooLongFrameException} will be raised.
     * @param validateHeaders {@code true} if http headers should be validated
     */
    public SpdyHttpDecoder(SpdyVersion version, int maxContentLength, boolean validateHeaders) {
        this(version, maxContentLength, new HashMap(), validateHeaders);
    }

    /**
     * Creates a new instance with the specified parameters.
     *
     * @param version the protocol version
     * @param maxContentLength the maximum length of the message content.
     *        If the length of the message content exceeds this value,
     *        a {@link TooLongFrameException} will be raised.
     * @param messageMap the {@link Map} used to hold partially received messages.
     */
    protected SpdyHttpDecoder(SpdyVersion version, int maxContentLength, Map messageMap) {
        this(version, maxContentLength, messageMap, true);
    }

    /**
     * Creates a new instance with the specified parameters.
     *
     * @param version the protocol version
     * @param maxContentLength the maximum length of the message content.
     *        If the length of the message content exceeds this value,
     *        a {@link TooLongFrameException} will be raised.
     * @param messageMap the {@link Map} used to hold partially received messages.
     * @param validateHeaders {@code true} if http headers should be validated
     */
    protected SpdyHttpDecoder(SpdyVersion version, int maxContentLength, Map messageMap, boolean validateHeaders) {
        spdyVersion = ObjectUtil.checkNotNull(version, "version").getVersion();
        this.maxContentLength = checkPositive(maxContentLength, "maxContentLength");
        this.messageMap = messageMap;
        this.validateHeaders = validateHeaders;
    }

    @Override
    public void channelInactive(ChannelHandlerContext ctx) throws Exception {
        // Release any outstanding messages from the map
        for (Map.Entry entry : messageMap.entrySet()) {
            ReferenceCountUtil.safeRelease(entry.getValue());
        }
        messageMap.clear();
        super.channelInactive(ctx);
    }

    protected FullHttpMessage putMessage(int streamId, FullHttpMessage message) {
        return messageMap.put(streamId, message);
    }

    protected FullHttpMessage getMessage(int streamId) {
        return messageMap.get(streamId);
    }

    protected FullHttpMessage removeMessage(int streamId) {
        return messageMap.remove(streamId);
    }

    @Override
    protected void decode(ChannelHandlerContext ctx, SpdyFrame msg, List out)
            throws Exception {
        if (msg instanceof SpdySynStreamFrame) {

            // HTTP requests/responses are mapped one-to-one to SPDY streams.
            SpdySynStreamFrame spdySynStreamFrame = (SpdySynStreamFrame) msg;
            int streamId = spdySynStreamFrame.streamId();

            if (SpdyCodecUtil.isServerId(streamId)) {
                // SYN_STREAM frames initiated by the server are pushed resources
                int associatedToStreamId = spdySynStreamFrame.associatedStreamId();

                // If a client receives a SYN_STREAM with an Associated-To-Stream-ID of 0
                // it must reply with a RST_STREAM with error code INVALID_STREAM.
                if (associatedToStreamId == 0) {
                    SpdyRstStreamFrame spdyRstStreamFrame =
                        new DefaultSpdyRstStreamFrame(streamId, SpdyStreamStatus.INVALID_STREAM);
                    ctx.writeAndFlush(spdyRstStreamFrame);
                    return;
                }

                // If a client receives a SYN_STREAM with isLast set,
                // reply with a RST_STREAM with error code PROTOCOL_ERROR
                // (we only support pushed resources divided into two header blocks).
                if (spdySynStreamFrame.isLast()) {
                    SpdyRstStreamFrame spdyRstStreamFrame =
                        new DefaultSpdyRstStreamFrame(streamId, SpdyStreamStatus.PROTOCOL_ERROR);
                    ctx.writeAndFlush(spdyRstStreamFrame);
                    return;
                }

                // If a client receives a response with a truncated header block,
                // reply with a RST_STREAM with error code INTERNAL_ERROR.
                if (spdySynStreamFrame.isTruncated()) {
                    SpdyRstStreamFrame spdyRstStreamFrame =
                    new DefaultSpdyRstStreamFrame(streamId, SpdyStreamStatus.INTERNAL_ERROR);
                    ctx.writeAndFlush(spdyRstStreamFrame);
                    return;
                }

                try {
                    FullHttpRequest httpRequestWithEntity = createHttpRequest(spdySynStreamFrame, ctx.alloc());

                    // Set the Stream-ID, Associated-To-Stream-ID, and Priority as headers
                    httpRequestWithEntity.headers().setInt(Names.STREAM_ID, streamId);
                    httpRequestWithEntity.headers().setInt(Names.ASSOCIATED_TO_STREAM_ID, associatedToStreamId);
                    httpRequestWithEntity.headers().setInt(Names.PRIORITY, spdySynStreamFrame.priority());

                    out.add(httpRequestWithEntity);

                } catch (Throwable ignored) {
                    SpdyRstStreamFrame spdyRstStreamFrame =
                        new DefaultSpdyRstStreamFrame(streamId, SpdyStreamStatus.PROTOCOL_ERROR);
                    ctx.writeAndFlush(spdyRstStreamFrame);
                }
            } else {
                // SYN_STREAM frames initiated by the client are HTTP requests

                // If a client sends a request with a truncated header block, the server must
                // reply with an HTTP 431 REQUEST HEADER FIELDS TOO LARGE reply.
                if (spdySynStreamFrame.isTruncated()) {
                    SpdySynReplyFrame spdySynReplyFrame = new DefaultSpdySynReplyFrame(streamId);
                    spdySynReplyFrame.setLast(true);
                    SpdyHeaders frameHeaders = spdySynReplyFrame.headers();
                    frameHeaders.setInt(STATUS, HttpResponseStatus.REQUEST_HEADER_FIELDS_TOO_LARGE.code());
                    frameHeaders.setObject(VERSION, HttpVersion.HTTP_1_0);
                    ctx.writeAndFlush(spdySynReplyFrame);
                    return;
                }

                try {
                    FullHttpRequest httpRequestWithEntity = createHttpRequest(spdySynStreamFrame, ctx.alloc());

                    // Set the Stream-ID as a header
                    httpRequestWithEntity.headers().setInt(Names.STREAM_ID, streamId);

                    if (spdySynStreamFrame.isLast()) {
                        out.add(httpRequestWithEntity);
                    } else {
                        // Request body will follow in a series of Data Frames
                        putMessage(streamId, httpRequestWithEntity);
                    }
                } catch (Throwable t) {
                    // If a client sends a SYN_STREAM without all of the getMethod, url (host and path),
                    // scheme, and version headers the server must reply with an HTTP 400 BAD REQUEST reply.
                    // Also sends HTTP 400 BAD REQUEST reply if header name/value pairs are invalid
                    SpdySynReplyFrame spdySynReplyFrame = new DefaultSpdySynReplyFrame(streamId);
                    spdySynReplyFrame.setLast(true);
                    SpdyHeaders frameHeaders = spdySynReplyFrame.headers();
                    frameHeaders.setInt(STATUS, HttpResponseStatus.BAD_REQUEST.code());
                    frameHeaders.setObject(VERSION, HttpVersion.HTTP_1_0);
                    ctx.writeAndFlush(spdySynReplyFrame);
                }
            }

        } else if (msg instanceof SpdySynReplyFrame) {

            SpdySynReplyFrame spdySynReplyFrame = (SpdySynReplyFrame) msg;
            int streamId = spdySynReplyFrame.streamId();

            // If a client receives a SYN_REPLY with a truncated header block,
            // reply with a RST_STREAM frame with error code INTERNAL_ERROR.
            if (spdySynReplyFrame.isTruncated()) {
                SpdyRstStreamFrame spdyRstStreamFrame =
                        new DefaultSpdyRstStreamFrame(streamId, SpdyStreamStatus.INTERNAL_ERROR);
                ctx.writeAndFlush(spdyRstStreamFrame);
                return;
            }

            try {
                FullHttpResponse httpResponseWithEntity =
                   createHttpResponse(spdySynReplyFrame, ctx.alloc(), validateHeaders);

                // Set the Stream-ID as a header
                httpResponseWithEntity.headers().setInt(Names.STREAM_ID, streamId);

                if (spdySynReplyFrame.isLast()) {
                    HttpUtil.setContentLength(httpResponseWithEntity, 0);
                    out.add(httpResponseWithEntity);
                } else {
                    // Response body will follow in a series of Data Frames
                    putMessage(streamId, httpResponseWithEntity);
                }
            } catch (Throwable t) {
                // If a client receives a SYN_REPLY without valid getStatus and version headers
                // the client must reply with a RST_STREAM frame indicating a PROTOCOL_ERROR
                SpdyRstStreamFrame spdyRstStreamFrame =
                    new DefaultSpdyRstStreamFrame(streamId, SpdyStreamStatus.PROTOCOL_ERROR);
                ctx.writeAndFlush(spdyRstStreamFrame);
            }

        } else if (msg instanceof SpdyHeadersFrame) {

            SpdyHeadersFrame spdyHeadersFrame = (SpdyHeadersFrame) msg;
            int streamId = spdyHeadersFrame.streamId();
            FullHttpMessage fullHttpMessage = getMessage(streamId);

            if (fullHttpMessage == null) {
                // HEADERS frames may initiate a pushed response
                if (SpdyCodecUtil.isServerId(streamId)) {

                    // If a client receives a HEADERS with a truncated header block,
                    // reply with a RST_STREAM frame with error code INTERNAL_ERROR.
                    if (spdyHeadersFrame.isTruncated()) {
                        SpdyRstStreamFrame spdyRstStreamFrame =
                            new DefaultSpdyRstStreamFrame(streamId, SpdyStreamStatus.INTERNAL_ERROR);
                        ctx.writeAndFlush(spdyRstStreamFrame);
                        return;
                    }

                    try {
                        fullHttpMessage = createHttpResponse(spdyHeadersFrame, ctx.alloc(), validateHeaders);

                        // Set the Stream-ID as a header
                        fullHttpMessage.headers().setInt(Names.STREAM_ID, streamId);

                        if (spdyHeadersFrame.isLast()) {
                            HttpUtil.setContentLength(fullHttpMessage, 0);
                            out.add(fullHttpMessage);
                        } else {
                            // Response body will follow in a series of Data Frames
                            putMessage(streamId, fullHttpMessage);
                        }
                    } catch (Throwable t) {
                        // If a client receives a SYN_REPLY without valid getStatus and version headers
                        // the client must reply with a RST_STREAM frame indicating a PROTOCOL_ERROR
                        SpdyRstStreamFrame spdyRstStreamFrame =
                            new DefaultSpdyRstStreamFrame(streamId, SpdyStreamStatus.PROTOCOL_ERROR);
                        ctx.writeAndFlush(spdyRstStreamFrame);
                    }
                }
                return;
            }

            // Ignore trailers in a truncated HEADERS frame.
            if (!spdyHeadersFrame.isTruncated()) {
                for (Map.Entry e: spdyHeadersFrame.headers()) {
                    fullHttpMessage.headers().add(e.getKey(), e.getValue());
                }
            }

            if (spdyHeadersFrame.isLast()) {
                HttpUtil.setContentLength(fullHttpMessage, fullHttpMessage.content().readableBytes());
                removeMessage(streamId);
                out.add(fullHttpMessage);
            }

        } else if (msg instanceof SpdyDataFrame) {

            SpdyDataFrame spdyDataFrame = (SpdyDataFrame) msg;
            int streamId = spdyDataFrame.streamId();
            FullHttpMessage fullHttpMessage = getMessage(streamId);

            // If message is not in map discard Data Frame.
            if (fullHttpMessage == null) {
                return;
            }

            ByteBuf content = fullHttpMessage.content();
            if (content.readableBytes() > maxContentLength - spdyDataFrame.content().readableBytes()) {
                removeMessage(streamId);
                throw new TooLongFrameException(
                        "HTTP content length exceeded " + maxContentLength + " bytes.");
            }

            ByteBuf spdyDataFrameData = spdyDataFrame.content();
            int spdyDataFrameDataLen = spdyDataFrameData.readableBytes();
            content.writeBytes(spdyDataFrameData, spdyDataFrameData.readerIndex(), spdyDataFrameDataLen);

            if (spdyDataFrame.isLast()) {
                HttpUtil.setContentLength(fullHttpMessage, content.readableBytes());
                removeMessage(streamId);
                out.add(fullHttpMessage);
            }

        } else if (msg instanceof SpdyRstStreamFrame) {

            SpdyRstStreamFrame spdyRstStreamFrame = (SpdyRstStreamFrame) msg;
            int streamId = spdyRstStreamFrame.streamId();
            removeMessage(streamId);
        }
    }

    private static FullHttpRequest createHttpRequest(SpdyHeadersFrame requestFrame, ByteBufAllocator alloc)
       throws Exception {
        // Create the first line of the request from the name/value pairs
        SpdyHeaders headers     = requestFrame.headers();
        HttpMethod  method      = HttpMethod.valueOf(headers.getAsString(METHOD));
        String      url         = headers.getAsString(PATH);
        HttpVersion httpVersion = HttpVersion.valueOf(headers.getAsString(VERSION));
        headers.remove(METHOD);
        headers.remove(PATH);
        headers.remove(VERSION);

        boolean release = true;
        ByteBuf buffer = alloc.buffer();
        try {
            FullHttpRequest req = new DefaultFullHttpRequest(httpVersion, method, url, buffer);

            // Remove the scheme header
            headers.remove(SCHEME);

            // Replace the SPDY host header with the HTTP host header
            CharSequence host = headers.get(HOST);
            headers.remove(HOST);
            req.headers().set(HttpHeaderNames.HOST, host);

            for (Map.Entry e : requestFrame.headers()) {
                req.headers().add(e.getKey(), e.getValue());
            }

            // The Connection and Keep-Alive headers are no longer valid
            HttpUtil.setKeepAlive(req, true);

            // Transfer-Encoding header is not valid
            req.headers().remove(HttpHeaderNames.TRANSFER_ENCODING);
            release = false;
            return req;
        } finally {
            if (release) {
                buffer.release();
            }
        }
    }

    private static FullHttpResponse createHttpResponse(SpdyHeadersFrame responseFrame, ByteBufAllocator alloc,
                                                       boolean validateHeaders) throws Exception {

        // Create the first line of the response from the name/value pairs
        SpdyHeaders headers = responseFrame.headers();
        HttpResponseStatus status = HttpResponseStatus.parseLine(headers.get(STATUS));
        HttpVersion version = HttpVersion.valueOf(headers.getAsString(VERSION));
        headers.remove(STATUS);
        headers.remove(VERSION);

        boolean release = true;
        ByteBuf buffer = alloc.buffer();
        try {
            FullHttpResponse res = new DefaultFullHttpResponse(version, status, buffer, validateHeaders);
            for (Map.Entry e: responseFrame.headers()) {
                res.headers().add(e.getKey(), e.getValue());
            }

            // The Connection and Keep-Alive headers are no longer valid
            HttpUtil.setKeepAlive(res, true);

            // Transfer-Encoding header is not valid
            res.headers().remove(HttpHeaderNames.TRANSFER_ENCODING);
            res.headers().remove(HttpHeaderNames.TRAILER);

            release = false;
            return res;
        } finally {
            if (release) {
                buffer.release();
            }
        }
    }
}
    

    

    

            

    

            



    
    






    
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