Getting OAuth verifier value as null - oauth

Question

I am trying to get access token for which I need OAuth verifier. I am using TokenSecretVerifierHolder class to get token, token secret and verifier but I am only getting the value of token, token secret, however the verifier value is coming aa null. Here is my code.
public TokenSecretVerifierHolder getRequestToken() {
try {
OAuthAccessor accessor = getAccessor();
OAuthClient oAuthClient = new OAuthClient(new HttpClient4());
List<OAuth.Parameter> callBack;
if ((this.callback == null) || ("".equals(this.callback))) {
callBack = Collections.emptyList();
} else {
callBack = ImmutableList.of(new OAuth.Parameter("oauth_callback", this.callback));
}
OAuthMessage message = oAuthClient.getRequestTokenResponse(accessor, "POST", callBack);
TokenSecretVerifierHolder tokenSecretVerifier = new TokenSecretVerifierHolder();
tokenSecretVerifier.token = accessor.requestToken;
tokenSecretVerifier.secret = accessor.tokenSecret;
tokenSecretVerifier.verifier = message.getParameter("oauth_verifier");
return tokenSecretVerifier;
} catch (Exception e) {
throw new RuntimeException("Failed to obtain request token", e);
}
}
private String getAccessToken() {
AtlassianOAuthClientRequest jiraoAuthClient = getJiraOAuthClient();
TokenSecretVerifierHolder requestToken = jiraoAuthClient.getRequestToken();
String authorizeUrl = jiraoAuthClient.getAuthorizeUrlForToken(requestToken.token);
String token = requestToken.token;
String tokenSecret = requestToken.secret;
String verifier = requestToken.verifier;
String accessToken = jiraoAuthClient.swapRequestTokenForAccessToken(token, tokenSecret, verifier);
String verifier = requestToken.verifier;
System.out.println("Access token is : " + accessToken);
return accessToken;
}
After retreiving the value of token, token secret and verifier I am passing it to get the access token value. What I want is that after I acknowledge the authorizeUrl it should return me the value of Oauth verifier. In my case its returning as null.

Answer 1

The required value of verifier is returned to you during HTTP redirect to your callback URL - the redirect happens with URL like https://consumer.url/?oauth_token=TOKEN&oauth_verifier=VERIFIER, so value of oauth_verifier parameter is what you need.