/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.jclouds.oauth.v2.filters;
import com.google.common.base.Function;
import com.google.common.cache.LoadingCache;
import org.jclouds.http.HttpException;
import org.jclouds.http.HttpRequest;
import org.jclouds.http.HttpRequestFilter;
import org.jclouds.oauth.v2.domain.Token;
import org.jclouds.oauth.v2.domain.TokenRequest;
import org.jclouds.rest.internal.GeneratedHttpRequest;
import javax.inject.Inject;
import javax.inject.Singleton;
import static com.google.common.base.Preconditions.checkState;
/**
* To be used by client applications to embed an OAuth authentication in their REST requests.
* <p/>
* TODO when we're able to use the OAuthAuthentication an this should be used automatically
*/
@Singleton
public class OAuthAuthenticator implements HttpRequestFilter {
private Function<GeneratedHttpRequest, TokenRequest> tokenRequestBuilder;
private Function<TokenRequest, Token> tokenFetcher;
@Inject
OAuthAuthenticator(Function<GeneratedHttpRequest, TokenRequest> tokenRequestBuilder, LoadingCache<TokenRequest,
Token> tokenFetcher) {
this.tokenRequestBuilder = tokenRequestBuilder;
this.tokenFetcher = tokenFetcher;
}
@Override
public HttpRequest filter(HttpRequest request) throws HttpException {
checkState(request instanceof GeneratedHttpRequest, "request must be an instance of GeneratedHttpRequest");
GeneratedHttpRequest generatedHttpRequest = GeneratedHttpRequest.class.cast(request);
TokenRequest tokenRequest = tokenRequestBuilder.apply(generatedHttpRequest);
Token token = tokenFetcher.apply(tokenRequest);
return request.toBuilder().addHeader("Authorization", String.format("%s %s",
token.getTokenType(), token.getAccessToken())).build();
}
}