io.kahu.hawaii.util.call.http.response.FileDownload.java Source code

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Here is the source code for io.kahu.hawaii.util.call.http.response.FileDownload.java

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/**
 * Copyright 2015 Q24
 *
 * 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.kahu.hawaii.util.call.http.response;

import java.io.IOException;
import java.io.OutputStream;

import javax.servlet.http.HttpServletResponse;

import org.apache.commons.lang3.StringUtils;

public class FileDownload {
    private final String fileName;
    private final String mimeType;
    private final HttpServletResponse response;

    public FileDownload(final String fileName, final String mimeType, final HttpServletResponse response) {
        this.fileName = fileName;
        this.mimeType = mimeType;
        this.response = response;
    }

    public void writeHttpStatus(final int statusCode) {
        response.setStatus(statusCode);
    }

    public void writeHeaders() {
        if (StringUtils.isNotEmpty(mimeType)) {
            response.setContentType(mimeType);
        }
        if (StringUtils.isNotEmpty(fileName)) {
            response.setHeader("Content-Disposition", "attachment; filename=" + fileName);
        }
    }

    public OutputStream getOutputStream() throws IOException {
        return response.getOutputStream();
    }

    public String getMimeType() {
        return mimeType;
    }

    public void close() throws IOException {
        response.getOutputStream().flush();
        response.getOutputStream().close();
    }

}