How to reset Inputstream

Question

I have a Webservice that saves the photo in a folder of the server that was sent by the Android application through the following code:

       ...

        int read = 0;
        byte[] bytes = new byte[1024];

        OutputStream out = new FileOutputStream(new File( caminhodestinofotos + uploadedFileName ));
        while (( read = uploadedInputStream.read(bytes)) != -1) {
            out.write(bytes, 0, read);
        }
        out.flush();
        out.close();

        ...

So far so good, but we decided to save this photo in the database.

To that end I thought of transforming the Inputstream that arrives the function of the Webservice in an array of bytes.

I added the following line at the beginning of the function:

byte[] arrbytes =  sun.misc.IOUtils.readFully(uploadedInputStream, -1, true);

It turns out that after running this line the LOOP that reads from the file adds to the byte array does not happen.

The line read = uploadedInputStream.read(bytes)) != -1 returns -1 as if Inputstream is at the end of the file and a sequential read cannot occur again.

How should I proceed? How to reset and place the reading pointer at the beginning of file again, or what would be another way to use that same Inputstream to save to file and save to database?

Grateful.

Answer 1

Hello, in the Inputstream there are two methods to this:

mark(int readLimit) - Do what the name says, mark a point on the file.

reset() - Reset exactly to the point marked by the above method.

I suggest trying to use a mark(1000) before the line you want to read in loop, and at the end give reset(), so the reader will go back to where it marked and run read().