Is it possible to gzip and upload this string to Amazon S3 without ever being written to disk?

Question

I know this is probably possible using Streams, but I wasn\'t sure the correct syntax.

I would like to pass a string to the Save method and have it gzip the string and u

Answer 1

This is essentially what aperkins suggested. I don't know the interface to AS3, so his suggestion to create a ByteArrayInputStream over the byte array is probably the way to go.

import java.io.*;
import java.util.zip.GZIPOutputStream;

import com.amazonaws.auth.PropertiesCredentials;
import com.amazonaws.services.s3.AmazonS3;
import com.amazonaws.services.s3.AmazonS3Client;
import com.amazonaws.services.s3.model.PutObjectRequest;

public class FileStore {
    public static void Save(String data) throws IOException {
        ByteArrayOutputStream baos = new ByteArrayOutputStream();

        Writer writer = new OutputStreamWriter(baos);
        writer.write(data);
        writer.flush();
        writer.close();

        byte[] zippedBytes = gzipFile(baos.toByteArray());

        AmazonS3 s3 = new AmazonS3Client(new PropertiesCredentials(
            new FileInputStream("AwsCredentials.properties")));

        String bucketName = "mybucket";
        String key = "test/" + zippedFile.getName();

        s3.putObject(new PutObjectRequest(bucketName, key,
            new ByteArrayInputStream(zippedBytes));
    }

    public static byte[] gzipFile(byte[] bytes) throws IOException {
        try {
            ByteArrayOutputStream baos = new ByteArrayOutputStream();
            GZIPOutputStream out = new GZIPOutputStream(baos);
            out.write(bytes, 0, bytes.length);
            // Complete the GZIP file
            out.finish();
            out.close();

            return baos.toByteArray();
        } catch (IOException e) {
            throw e;
        }
    }
}