Can't read js file from url in correct encoding

Question

I want to read js file as string from url https://d3c3cq33003psk.cloudfront.net/opentag-67008-473432.js

I tried several ways (to read from url or to download and then read), but all the time I received unreadable characters, like �(��_�s��d������:`���.����i�....
The ways I tried it:
1. dowload file from url:

FileUtils.copyURLToFile(jsUrl, file);

2. read from url:

    StringBuilder sb = new StringBuilder();
    try {
        URL url = new URL(jsUrl);
        // read text returned by server
        BufferedReader in = new BufferedReader(new InputStreamReader(url.openStream(), "UTF-8"));
        String line;
        while ((line = in.readLine()) != null) {
            sb.append(line).append("\n");
        }
        in.close();
    } catch (Exception e) {
    }
    return sb.toString();

If I download the file manually from the url (page-> save as...) - it could be opened with Notepad++ in normal UTF-8 encoding.
Could anybody help me to handle the weird file?

Answer 1

It's GZIPped. Use a GZIPInputStream.

UPDATE

        InputStream stream = url.openStream();
        if ("gzip".equalsIgnoreCase(cnt.getHeaderField("Content-Encoding"))) {
            stream = new GZIPInputStream(stream);
        }
        BufferedReader in = new BufferedReader(new InputStreamReader(stream, "UTF-8"));

UPDATE 2

With URLConnection:

        URLConnection cnt = url.openConnection();
        InputStream stream = cnt.getInputStream();
        if ("gzip".equalsIgnoreCase(cnt.getHeaderField("Content-Encoding"))) {
            stream = new GZIPInputStream(stream);
        }
        BufferedReader read = new BufferedReader(new InputStreamReader(stream, "UTF-8"));