Upload photos from Android app to Google Cloud Sto

Question

I've having trouble uploading photos from my android app to GCS. I'm able to upload text files but not photos. I've tried various mime-types as well as different Base64 encoding methods (decodeBase64, encodeBase64URLSafeString, etc...)

I feel like I'm really close.

This is the error message that I receive:

com.google.appengine.repackaged.org.codehaus.jackson.JsonParseException: Illegal character '_' (code 0x5f) in base64 content at [Source: N/A; line: -1, column: -1]

I looked at the encoded String and there aren't any '_' in there.

Android code:

Activity:
protected void onActivityResult(int requestCode, int resultCode, Intent data)
    {
        switch (requestCode)
        {
            case 0:
            {

                try
                {



                        InputStream is = getContentResolver().openInputStream(data.getData());

                        tvMessage.setText("Done!");

                        byte[] b = getBytes(is);

                        gaeTask task = new gaeTask();

                        PhotoObject p = new PhotoObject();

                        p.encodeBytes(b);
                        p.setName("picturejpg.jpg");

                        task.execute(p);
                }
}
AsnycTask:
protected String doInBackground(PhotoObject... params)
        {
            String responseMessage = "";

            try
            {
                PhotoObjectEndpoint builder = new PhotoObjectEndpoint(AndroidHttp.newCompatibleTransport(), new JacksonFactory(), new HttpRequestInitializer()
                {

                    @Override
                    public void initialize(HttpRequest arg0) throws IOException
                    {
                        // TODO Auto-generated method stub

                    }
                });

                PhotoObject p = params[0];
                builder.insertPhotoObject(p).execute();

                responseMessage = p.getName() + " was successfully deployed.";
            }

GAE/GCS Code:

GAE – PhotoObject:
@Entity
public class PhotoObject
{
    public PhotoObject(){}

      @Id
      @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Key key;

    public Key getKey()
    {
        return key;
    }
    public void setKey(Key key)
    {
        this.key = key;
    }

    private String mBytes;

    public byte[] getBytes()
    {
        return decodeBytes();
    }
    public void setBytes(byte[] mBytes)
    {
        this.mBytes = encodeBytes(mBytes);
    }

    private String name;

    public String getName()
    {
        return name;
    }
    public void setName(String name)
    {
        this.name = name;
    }

    private FileType type;


    public FileType getType()
    {
        return type;
    }
    public void setType(FileType type)
    {
        this.type = type;
    }
    /**
     * 
     * @see #getBytes()
     * @return Base64 decoded value or {@code null} for none
     * 
     * @since 1.14
     */
    public byte[] decodeBytes()
    {
        return com.google.api.client.util.Base64.decodeBase64(mBytes);
    }
    /**
     * 
     * @see #setBytes()
     * 
     *      <p>
     *      The value is encoded Base64 or {@code null} for none.
     *      </p>
     * 
     * @since 1.14
     */
    public String encodeBytes(byte[] bytes)
    {
        //this.mBytes = com.google.api.client.util.Base64.encodeBase64URLSafeString(bytes);
        this.mBytes = com.google.api.client.util.Base64.encodeBase64String(bytes);

        return this.mBytes;
    }

}

GAE - insertPhotoObject:
try
        {

        final GcsService gcsService = GcsServiceFactory.createGcsService(RetryParams.getDefaultInstance());
        GcsFilename name = new GcsFilename("testbucket123", fileName);
        GcsFileOptions.Builder optionsBuilder = new GcsFileOptions.Builder();

        optionsBuilder.mimeType("image/jpg");
            GcsOutputChannel outputChannel = gcsService.createOrReplace(name, optionsBuilder.build());
            ObjectOutputStream out = new ObjectOutputStream(Channels.newOutputStream(outputChannel));
            out.write(bytes);
            out.close();

}

Thanks in advance.

Answer 1

Resolved!

I had 2 problems.

1. I was encoding the string improperly. When I actually looked at the outputted JSON, I could see the there were "_" in the string. I fixed this by using adding the line

   String s = Base64.encodeToString(b, Base64.DEFAULT);

I had tried that before but the image still wouldn't display properly.

1. I wasn't wrapping the byte array in a ByteBuffer, before uploading to GCS:

   GcsOutputChannel outputChannel = gcsService.createOrReplace(name, optionsBuilder.build());
   outputChannel.write(ByteBuffer.wrap(bytes)); outputChannel.close();