org.asynchttpclient.request.body.multipart.FileLikePart Maven / Gradle / Ivy

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/*
 * Copyright (c) 2014 AsyncHttpClient Project. All rights reserved.
 *
 * This program is licensed to you under the Apache License Version 2.0,
 * and you may not use this file except in compliance with the Apache License Version 2.0.
 * You may obtain a copy of the Apache License Version 2.0 at http://www.apache.org/licenses/LICENSE-2.0.
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the Apache License Version 2.0 is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the Apache License Version 2.0 for the specific language governing permissions and limitations there under.
 */
package org.asynchttpclient.request.body.multipart;

import static org.asynchttpclient.util.MiscUtils.withDefault;

import java.io.IOException;
import java.io.InputStream;
import java.nio.charset.Charset;

import javax.activation.MimetypesFileTypeMap;

/**
 * This class is an adaptation of the Apache HttpClient implementation
 */
public abstract class FileLikePart extends PartBase {

    private static final MimetypesFileTypeMap MIME_TYPES_FILE_TYPE_MAP;

    static {
        try (InputStream is = Thread.currentThread().getContextClassLoader().getResourceAsStream("ahc-mime.types")) {
            MIME_TYPES_FILE_TYPE_MAP = new MimetypesFileTypeMap(is);
        } catch (IOException e) {
            throw new ExceptionInInitializerError(e);
        }
    }

    /**
     * Default content encoding of file attachments.
     */
    private String fileName;

    private static String computeContentType(String contentType, String fileName) {
        if (contentType == null) {
            // TODO use a ThreadLocal to get work around synchronized?
            contentType = MIME_TYPES_FILE_TYPE_MAP.getContentType(withDefault(fileName, ""));
        }

        return contentType;
    }

    /**
     * FilePart Constructor.
     * 
     * @param name the name for this part
     * @param contentType the content type for this part, if null try to figure out from the fileName mime type
     * @param charset the charset encoding for this part
     * @param fileName the fileName
     * @param contentId the content id
     * @param transfertEncoding the transfer encoding
     */
    public FileLikePart(String name, String contentType, Charset charset, String fileName, String contentId, String transfertEncoding) {
        super(name,//
                computeContentType(contentType, fileName),//
                charset,//
                contentId,//
                transfertEncoding);
        this.fileName = fileName;
    }

    public String getFileName() {
        return fileName;
    }

    @Override
    public String toString() {
        return new StringBuilder()//
                .append(super.toString())//
                .append(" filename=").append(fileName)//
                .toString();
    }
}