Application require google refresh token, I try to call service based on google OAuth2 doc.
https://developers.google.com/identity/protocols/OAuth2InstalledApp
Step 5: Exchange authorization code for refresh and access tokens
Service throw exception.
"java.io.FileNotFoundException: https://www.googleapis.com/oauth2/v4/token"
Use Service like :
POST /oauth2/v4/token HTTP/1.1 Host: www.googleapis.com Content-Type: application/x-www-form-urlencoded
code=4/P7q7W91a-oMsCeLvIaQm6bTrgtp7& client_id=your_client_id& client_secret=your_client_secret& redirect_uri=https://oauth2.example.com/code& grant_type=authorization_code
Sample code :
class getTokenAsyncTask extends AsyncTask<String, Void, String> {
@Override
protected String doInBackground(String... params) {
String JsonResponse = "";
BufferedReader reader = null;
HttpURLConnection urlConn;
try {
URL url = new URL("https://www.googleapis.com/oauth2/v4/token");
String client_id = "******9-tt3qav2d2rp45sgjqp5helrsbvc22kdq.apps.googleusercontent.com";
String client_secret = ""; //This value is not needed for clients registered as Android, iOS, or Chrome applications.
String redirect_uri = "http://localhost";
String grant_type = "authorization_code";
String code = params[0]; // serverAuthCode code
HashMap<String, String> params1 = new HashMap<String, String>();
params1.put("client_id", client_id);
params1.put("client_secret", client_secret);
params1.put("grant_type", grant_type);
params1.put("redirect_uri", redirect_uri);
params1.put("code", code); // your code received
Set set = params1.entrySet();
Iterator i = set.iterator();
StringBuilder postData = new StringBuilder();
for (Map.Entry<String, String> param : params1.entrySet()) {
if (postData.length() != 0) {
postData.append('&');
}
postData.append(URLEncoder.encode(param.getKey(), "UTF-8"));
postData.append('=');
postData.append(URLEncoder.encode(String.valueOf(param.getValue()), "UTF-8"));
}
byte[] postDataBytes = postData.toString().getBytes("UTF-8");
HttpsURLConnection conn = (HttpsURLConnection) url.openConnection();
conn.setRequestMethod("GET");
conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
conn.setRequestProperty("Content-Length", String.valueOf(postDataBytes.length));
conn.setDoOutput(true);
conn.getOutputStream().write(postDataBytes);
reader = new BufferedReader(new InputStreamReader(conn.getInputStream(), "UTF-8"));
StringBuilder builder = new StringBuilder();
for (String line = null; (line = reader.readLine()) != null; ) {
builder.append(line).append("\n");
}
reader.close();
conn.disconnect();
System.out.println("token returned: " + builder.toString());
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
}
Please suggest me, How to call service and received refresh token id in android app.
