Parse file name from URL before downloading the file

Question

I\'m downloading an ePub file from a URL.

Now I want to implement a mechanism by which if user tries to re-download the same file, he should get warning/error messag

Answer 1

You dont really have to compare file names. Just make File object for the file with absolute path and check if file exists.

protected boolean need2Download(String fileName) {

    File basePath = new File(BOOK_STORE_PATH);

    File fullPath = new File(basePath, fileName);

    if (fullPath.exists())
        return false;
    return true;
}

protected void downloadFile(String url) {
    String fileName = url.substring(url.lastIndexOf('/') + 1);

    if (need2Download(fileName)) {
        // download
    }
}