| // Copyright (C) 2018 The Android Open Source Project |
| // |
| // 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.googlesource.gerrit.plugins.oauth; |
| |
| import static org.scribe.model.OAuthConstants.ACCESS_TOKEN; |
| |
| import com.google.common.annotations.VisibleForTesting; |
| 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; |
| |
| class OAuth2AccessTokenJsonExtractor implements AccessTokenExtractor { |
| private static final Pattern ACCESS_TOKEN_REGEX_PATTERN = |
| Pattern.compile("\"" + ACCESS_TOKEN + "\"\\s*:\\s*\"(\\S*?)\""); |
| |
| private OAuth2AccessTokenJsonExtractor() {} |
| |
| private static final AccessTokenExtractor INSTANCE = new OAuth2AccessTokenJsonExtractor(); |
| |
| static AccessTokenExtractor instance() { |
| return INSTANCE; |
| } |
| |
| @VisibleForTesting |
| @Override |
| public Token extract(String response) { |
| Preconditions.checkEmptyString(response, "Cannot extract a token from a null or empty String"); |
| Matcher matcher = ACCESS_TOKEN_REGEX_PATTERN.matcher(response); |
| if (matcher.find()) { |
| return new Token(matcher.group(1), "", response); |
| } |
| throw new OAuthException("Cannot extract an access token. Response was: " + response); |
| } |
| } |