io.micronaut.http.server.netty.FormDataHttpContentProcessor Maven / Gradle / Ivy

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/*
 * Copyright 2017-2020 original authors
 *
 * 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
 *
 * 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.micronaut.http.server.netty;

import io.micronaut.core.annotation.Internal;
import io.micronaut.http.MediaType;
import io.micronaut.http.exceptions.ContentLengthExceededException;
import io.micronaut.http.server.HttpServerConfiguration;
import io.micronaut.http.server.netty.configuration.NettyHttpServerConfiguration;
import io.netty.buffer.ByteBufHolder;
import io.netty.handler.codec.http.HttpContent;
import io.netty.handler.codec.http.HttpRequest;
import io.netty.handler.codec.http.multipart.Attribute;
import io.netty.handler.codec.http.multipart.FileUpload;
import io.netty.handler.codec.http.multipart.HttpDataFactory;
import io.netty.handler.codec.http.multipart.HttpPostMultipartRequestDecoder;
import io.netty.handler.codec.http.multipart.HttpPostRequestDecoder;
import io.netty.handler.codec.http.multipart.HttpPostStandardRequestDecoder;
import io.netty.handler.codec.http.multipart.InterfaceHttpData;
import io.netty.handler.codec.http.multipart.InterfaceHttpPostRequestDecoder;

import java.io.IOException;
import java.nio.charset.Charset;
import java.util.Collection;

/**
 * Decodes {@link MediaType#MULTIPART_FORM_DATA} in a non-blocking manner.
 *
 * Designed to be used by a single thread
 *
 * @author Graeme Rocher
 * @since 1.0
 */
@Internal
public class FormDataHttpContentProcessor extends AbstractHttpContentProcessor {

    private final InterfaceHttpPostRequestDecoder decoder;
    private final boolean enabled;
    private final long partMaxSize;

    /**
     * Set to true to request a destroy by any thread.
     */
    private volatile boolean pleaseDestroy = false;
    /**
     * {@code true} during {@link #onData}, can't destroy while that's running.
     */
    private volatile boolean inFlight = false;
    /**
     * {@code true} if the decoder has been destroyed or will be destroyed in the near future.
     */
    private boolean destroyed = false;

    /**
     * @param nettyHttpRequest The {@link NettyHttpRequest}
     * @param configuration    The {@link NettyHttpServerConfiguration}
     */
    public FormDataHttpContentProcessor(NettyHttpRequest nettyHttpRequest, HttpServerConfiguration configuration) {
        super(nettyHttpRequest, configuration);
        Charset characterEncoding = nettyHttpRequest.getCharacterEncoding();
        HttpServerConfiguration.MultipartConfiguration multipart = configuration.getMultipart();
        HttpDataFactory factory = new MicronautHttpData.Factory(multipart, characterEncoding);
        // prevent the decoders from immediately parsing the content
        HttpRequest nativeRequest = nettyHttpRequest.toHttpRequestWithoutBody();
        if (HttpPostRequestDecoder.isMultipart(nativeRequest)) {
            this.decoder = new HttpPostMultipartRequestDecoder(factory, nativeRequest, characterEncoding);
        } else {
            this.decoder = new HttpPostStandardRequestDecoder(factory, nativeRequest, characterEncoding);
        }
        this.enabled = nettyHttpRequest.getContentType().map(type -> type.equals(MediaType.APPLICATION_FORM_URLENCODED_TYPE)).orElse(false) ||
            multipart.isEnabled();
        this.partMaxSize = multipart.getMaxFileSize();
    }

    @Override
    public boolean isEnabled() {
        return enabled;
    }

    @Override
    protected void onData(ByteBufHolder message, Collection