/*
* 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.ExtractorType;
import org.agorava.api.extractor.TokenExtractor;
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.extractor.ExtractorType.Type.TOKEN_STD;
/**
* Default implementation of {@RequestTokenExtractor} and {@AccessTokenExtractor}. Conforms to OAuth 1.0a
* <p/>
* The process for extracting access and request tokens is similar so this class can do both things.
*
* @author Pablo Fernandez
*/
@ExtractorType(TOKEN_STD)
public class TokenExtractor10 implements TokenExtractor {
private static final Pattern TOKEN_REGEX = Pattern.compile("oauth_token=([^&]+)");
private static final Pattern SECRET_REGEX = Pattern.compile("oauth_token_secret=([^&]*)");
/**
* {@inheritDoc}
*/
public Token extract(String response) {
Preconditions.checkEmptyString(response, "Response body is incorrect. Can't extract a token from an empty string");
String token = extract(response, TOKEN_REGEX);
String secret = extract(response, SECRET_REGEX);
return new Token(token, secret);
}
private String extract(String response, Pattern p) {
Matcher matcher = p.matcher(response);
if (matcher.find() && matcher.groupCount() >= 1) {
return OAuthEncoder.decode(matcher.group(1));
} else {
throw new AgoravaException("Response body is incorrect. Can't extract token and secret from this: '" + response +
"'", null);
}
}
}