how to access authorization code using java ?

[heerend...@gmail.com]

• Issue Summary: I am trying to access authorization code using java when i hit get request using HttpURLConnection,it redirect me to a login page,while i need to redirect my response to appended URL with authorization code so that i can get access token.
• my code script is:-

String urlValue = "https://authorization.sandboxcerner.com/tenants/0b8a0111-e8e6-4c26-a91c-5069cbc6b1ca/protocols/oauth2/profiles/smart-v1/personas/provider/authorize?client_id=a023e99e-82c3-4565-9a87-d605e8ea3c9a&response_type=code&redirect_uri=&scope=user%2FPatient.read%20online_access&launch=&aud=https%3A%2F%2Ffhir-ehr.sandboxcerner.com%2Fdstu2%2F0b8a0111-e8e6-4c26-a91c-5069cbc6b1ca&state=d442fd61-b4bd-47a0-931a-f16b6ee8c526";

URL siteURL = new URL(urlValue);

HttpURLConnection connection = (HttpURLConnection) siteURL.openConnection();

connection.setRequestMethod("GET");

                HttpResponse response = httpclient.execute(post);

String body = EntityUtils.toString(response.getEntity());

System.out.println(body);

[Dennis Patterson (Cerner)]

Do you have a redirect url?  After login, the authorization server will create your authorization code which will be provided to your redirect url as a query parameter.  Refer to this sequence diagram - http://hl7.org/fhir/smart-app-launch/#smart-authorization-sequence

In the example you give, you have "redirect_uri=", showing you're not providing a value.