/** Sends a POST request to obtain an access token. */
private void obtainAccessToken() {
try {
token = new OAuth2Token();
error = new OAuth2Error();
/* build the request and send it to the token server */
CloseableHttpClient client = HttpClients.createDefault();
HttpPost request = new HttpPost(tokenServer);
request.setEntity(new UrlEncodedFormEntity(Utils.mapToList(tokenParams)));
CloseableHttpResponse response = client.execute(request);
HttpEntity entity = response.getEntity();
/* get the response and parse it */
JsonParser jp = json.getFactory().createParser(entity.getContent());
while (jp.nextToken() != null) {
JsonToken jsonToken = jp.getCurrentToken();
switch (jsonToken) {
case FIELD_NAME:
String name = jp.getCurrentName();
jsonToken = jp.nextToken();
if (name.equals("access_token")) {
token.setAccessToken(jp.getValueAsString());
} else if (name.equals("token_type")) {
token.setType(OAuth2TokenType.valueOf(jp.getValueAsString().toUpperCase()));
} else if (name.equals("expires_in")) {
token.setExpiresIn(jp.getValueAsInt());
} else if (name.equals("refresh_token")) {
token.setRefreshToken(jp.getValueAsString());
} else if (name.equals("kid")) {
token.setKeyId(jp.getValueAsString());
} else if (name.equals("mac_key")) {
token.setMacKey(jp.getValueAsString());
} else if (name.equals("mac_algorithm")) {
token.setMacAlgorithm(jp.getValueAsString());
} else if (name.equals("error")) {
error.setType(OAuth2ErrorType.valueOf(jp.getValueAsString().toUpperCase()));
} else if (name.equals("error_description")) {
error.setDescription(jp.getValueAsString());
} else if (name.equals("error_uri")) {
error.setUri(jp.getValueAsString());
}
ready = true;
break;
default:
break;
}
}
jp.close();
response.close();
client.close();
} catch (IOException e) {
error.setType(OAuth2ErrorType.SERVER_ERROR);
error.setDescription("Failed to obtain access token from the server.");
}
/* notify all waiting objects */
synchronized (waitObject) {
ready = true;
waitObject.notifyAll();
}
}
