io.gatling.http.client.body.multipart.impl.FilePartImpl.java Source code

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Here is the source code for io.gatling.http.client.body.multipart.impl.FilePartImpl.java

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/*
 * Copyright 2011-2018 GatlingCorp (https://gatling.io)
 *
 * 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
 *
 *  http://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.gatling.http.client.body.multipart.impl;

import static io.gatling.http.client.ahc.util.MiscUtils.*;

import io.gatling.http.client.body.multipart.FilePart;
import io.netty.buffer.ByteBuf;

import java.io.File;
import java.io.IOException;
import java.io.RandomAccessFile;
import java.nio.channels.FileChannel;
import java.nio.channels.WritableByteChannel;

public class FilePartImpl extends FileLikePartImpl<FilePart> {

    private final File file;
    private final long length;
    private FileChannel channel;
    private long position = 0L;

    public FilePartImpl(FilePart part, byte[] boundary) {
        super(part, boundary);
        file = part.getContent();
        length = file.length();
    }

    private FileChannel getChannel() throws IOException {
        if (channel == null) {
            channel = new RandomAccessFile(file, "r").getChannel();
        }
        return channel;
    }

    @Override
    protected long getContentLength() {
        return file.length();
    }

    @Override
    protected void copyContentInto(ByteBuf target) throws IOException {
        // can return -1 if file is empty or FileChannel was closed
        int transferred = target.writeBytes(getChannel(), target.writableBytes());
        if (transferred > 0) {
            position += transferred;
        }
        if (position == file.length() || transferred < 0) {
            state = PartImplState.POST_CONTENT;
            if (channel.isOpen()) {
                channel.close();
            }
        }
    }

    @Override
    protected long transferContentTo(WritableByteChannel target) throws IOException {
        // WARN: don't use channel.position(), it's always 0 here
        // from FileChannel javadoc: "This method does not modify this channel's
        // position."
        long transferred = getChannel().transferTo(position, MultipartChunkedInput.DEFAULT_CHUNK_SIZE, target);
        if (transferred > 0) {
            position += transferred;
        }
        if (position == length || transferred < 0) {
            state = PartImplState.POST_CONTENT;
            if (channel.isOpen()) {
                channel.close();
            }
        } else {
            slowTarget = true;
        }
        return transferred;
    }

    @Override
    public void close() {
        super.close();
        closeSilently(channel);
    }
}