Sonatype Nexus Rest API 401 Unauthorzed

Question

I'm trying to get an artifact from a secured nexus repository from java using the Rest API. I'm getting 401 Unauthorized as a response.

What do I need to do in order to authorize myself?

String url = "http://myNexus.com/service/local/artifact/maven/redirect?r=my-repo&g=my.group&a=my-artifact&v=LATEST";

HttpClient client = new DefaultHttpClient();
HttpGet request = new HttpGet(url);

HttpResponse response = null;

response = client.execute(request);

System.out.println("Response Code : "
       + response.getStatusLine().getStatusCode());

Answer 1

I would suggest to use the Nexus Client library rather than writing your own Java wrapper for the REST API. More details and links to examples are in the Nexus book.

Answer 2

I used java to simulate GET method. The 3rd param "auth" is the basic http authentication example.
http://en.wikipedia.org/wiki/Basic_access_authentication
http://en.wikipedia.org/wiki/BASE64

    public String sendGet(String url, String param, String auth) {
    String result = "";
    BufferedReader in = null;
    try {
        String urlName = url + "?" + param;
        URL realUrl = new URL(urlName);
        URLConnection conn = realUrl.openConnection();
        conn.setRequestProperty("accept", "*/*");
        conn.setRequestProperty("connection", "Keep-Alive");
        conn.setRequestProperty("user-agent",
                "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1)");
        conn.setRequestProperty("Accept", "application/json");
        conn.addRequestProperty("Authorization", "Basic " + auth);
        conn.connect();
        in = new BufferedReader(
                new InputStreamReader(conn.getInputStream()));
        String line;
        while ((line = in.readLine()) != null) {
            result += line;
        }
    } catch (Exception e) {
        e.printStackTrace();
    }
    finally {
        try {
            if (in != null) {
                in.close();
            }
        } catch (IOException ex) {
            ex.printStackTrace();
        }
    }
    return result;
}