GithubTokenExtractor.java example

/*
 * Copyright (c) 2014.
 *
 * BaasBox - info-at-baasbox.com
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.baasbox.service.sociallogin.extractors;


import java.util.regex.Matcher;
import java.util.regex.Pattern;

import org.scribe.exceptions.OAuthException;
import org.scribe.extractors.AccessTokenExtractor;
import org.scribe.model.Token;
import org.scribe.utils.Preconditions;

public class GithubTokenExtractor implements AccessTokenExtractor 
{

	private Pattern accessTokenPattern = Pattern.compile("access_token=([^&]+)");

	public Token extract(String response) 
	{
		Preconditions.checkEmptyString(response,
				"Cannot extract a token from a null or empty String");
		Matcher matcher = accessTokenPattern.matcher(response);
		if (matcher.find()) 
		{
			return new Token(matcher.group(1), "", response);
		} 
		else 
		{
			throw new OAuthException(
					"Cannot extract an access token. Response was: " + response);
		}
	}
}