/*
* Copyright 2013 Agorava
*
* 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 org.agorava.oauth.helpers.extractors;
import org.agorava.api.exception.AgoravaException;
import org.agorava.api.extractor.TokenExtractor;
import org.agorava.api.oauth.OAuth;
import org.agorava.api.oauth.Token;
import org.agorava.api.service.OAuthEncoder;
import org.agorava.api.service.Preconditions;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import static org.agorava.api.oauth.OAuth.OAuthVersion.TWO_FINAL;
/**
* @author Antoine Sabot-Durand
*/
@OAuth(TWO_FINAL)
public class TokenExtractor20Final implements TokenExtractor {
private static final String TOKEN_REGEX = "\"access_token\":\"([^\"]+)";
private static final String EMPTY_SECRET = "";
/**
* {@inheritDoc}
*/
public Token extract(String response) {
Preconditions.checkEmptyString(response, "Response body is incorrect. Can't extract a token from an empty string");
Matcher matcher = Pattern.compile(TOKEN_REGEX).matcher(response);
if (matcher.find()) {
String token = OAuthEncoder.decode(matcher.group(1));
return new Token(token, EMPTY_SECRET);
} else {
throw new AgoravaException("Response body is incorrect. Can't extract a token from this: '" + response + "'", null);
}
}
}