| /** |
| * 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.apache.camel.component.gae.auth; |
| |
| import java.io.IOException; |
| |
| import com.google.gdata.client.authn.oauth.GoogleOAuthParameters; |
| |
| import org.apache.camel.Exchange; |
| import org.apache.camel.component.gae.bind.OutboundBinding; |
| |
| /** |
| * Binds {@link GoogleOAuthParameters} to a Camel {@link Exchange}. This binding |
| * is used by <code>gauth:upgrade</code> endpoints by default. |
| */ |
| public class GAuthUpgradeBinding implements OutboundBinding<GAuthEndpoint, GoogleOAuthParameters, GoogleOAuthParameters> { |
| |
| /** |
| * Name of the Camel header containing an access token. |
| */ |
| public static final String GAUTH_ACCESS_TOKEN = "CamelGauthAccessToken"; |
| |
| /** |
| * Name of the Camel header containing an access token secret. |
| */ |
| public static final String GAUTH_ACCESS_TOKEN_SECRET = "CamelGauthAccessTokenSecret"; |
| |
| /** |
| * Default value for access token and access token secret in GoogleOAuthParameters |
| */ |
| private static final String EMPTY_TOKEN = ""; |
| |
| /** |
| * Creates a {@link GoogleOAuthParameters} object from endpoint and |
| * <code>exchange.getIn()</code> data. The created parameter object is used |
| * to upgrade an authorized request token to an access token. If the |
| * {@link GAuthComponent} is configured to use the HMAC_SHA1 signature |
| * method, a request token secret is obtained from a |
| * {@link GAuthTokenSecret#COOKIE_NAME} cookie. |
| * |
| * @param endpoint |
| * @param exchange |
| * @param request |
| * ignored. |
| * @return |
| * @throws GAuthException |
| * if the {@link GAuthComponent} is configured to use the |
| * HMAC_SHA1 signature method but there's no cookie with the |
| * request token secret. |
| */ |
| public GoogleOAuthParameters writeRequest(GAuthEndpoint endpoint, Exchange exchange, GoogleOAuthParameters request) throws Exception { |
| request = new GoogleOAuthParameters(); |
| request.setOAuthConsumerKey(endpoint.getConsumerKey()); |
| request.setOAuthConsumerSecret(endpoint.getConsumerSecret()); |
| request.setOAuthToken(exchange.getIn().getHeader("oauth_token", String.class)); |
| request.setOAuthVerifier(exchange.getIn().getHeader("oauth_verifier", String.class)); |
| |
| if (endpoint.getComponent().getKeyLoader() == null) { |
| // HMAC_SHA signature is used for getting an access token. |
| // The required token secret has been previously stored as cookie. |
| String cookie = exchange.getIn().getHeader("Cookie", String.class); |
| GAuthTokenSecret tokenSecret = GAuthTokenSecret.fromCookie(cookie); |
| if (tokenSecret == null) { |
| throw new GAuthException(GAuthTokenSecret.COOKIE_NAME + " cookie doesn't exist"); |
| } |
| request.setOAuthTokenSecret(tokenSecret.getValue()); |
| } |
| return request; |
| } |
| |
| /** |
| * Creates an <code>exchange.getOut()</code> message that containing the |
| * access token and the access token secret in the message header. |
| * |
| * @param endpoint |
| * @param exchange |
| * @param response |
| * @return |
| * @see #GAUTH_ACCESS_TOKEN |
| * @see #GAUTH_ACCESS_TOKEN_SECRET |
| */ |
| public Exchange readResponse(GAuthEndpoint endpoint, Exchange exchange, GoogleOAuthParameters response) throws IOException { |
| exchange.getOut().setHeaders(exchange.getIn().getHeaders()); |
| exchange.getOut().setHeader(GAUTH_ACCESS_TOKEN, canonicalizeToken(response.getOAuthToken())); |
| exchange.getOut().setHeader(GAUTH_ACCESS_TOKEN_SECRET, canonicalizeToken(response.getOAuthTokenSecret())); |
| return exchange; |
| } |
| |
| private static String canonicalizeToken(String token) { |
| if (token == null) { |
| return null; |
| } else if (EMPTY_TOKEN.equals(token)) { |
| return null; |
| } else { |
| return token; |
| } |
| } |
| |
| } |