oauth.signpost.OAuthProvider Maven / Gradle / Ivy
/* Copyright (c) 2009 Matthias Kaeppler
*
* 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 oauth.signpost;
import java.io.Serializable;
import java.util.Map;
import oauth.signpost.basic.DefaultOAuthConsumer;
import oauth.signpost.basic.DefaultOAuthProvider;
import oauth.signpost.exception.OAuthCommunicationException;
import oauth.signpost.exception.OAuthExpectationFailedException;
import oauth.signpost.exception.OAuthMessageSignerException;
import oauth.signpost.exception.OAuthNotAuthorizedException;
/**
*
* Supplies an interface that can be used to retrieve request and access tokens
* from an OAuth 1.0(a) service provider. A provider object requires an
* {@link OAuthConsumer} to sign the token request message; after a token has
* been retrieved, the consumer is automatically updated with the token and the
* corresponding secret.
*
*
* To initiate the token exchange, create a new provider instance and configure
* it with the URLs the service provider exposes for requesting tokens and
* resource authorization, e.g.:
*
*
*
* OAuthProvider provider = new DefaultOAuthProvider("http://twitter.com/oauth/request_token",
* "http://twitter.com/oauth/access_token", "http://twitter.com/oauth/authorize");
*
*
* Depending on the HTTP library you use, you may need a different provider
* type, refer to the website documentation for how to do that.
*
*
* To receive a request token which the user must authorize, you invoke it using
* a consumer instance and a callback URL:
*
*
*
*
* String url = provider.retrieveRequestToken(consumer, "http://www.example.com/callback");
*
*
*
*
* That url must be opened in a Web browser, where the user can grant access to
* the resources in question. If that succeeds, the service provider will
* redirect to the callback URL and append the blessed request token.
*
*
* That token must now be exchanged for an access token, as such:
*
*
*
*
* provider.retrieveAccessToken(consumer, nullOrVerifierCode);
*
*
*
*
* where nullOrVerifierCode is either null if your provided a callback URL in
* the previous step, or the pin code issued by the service provider to the user
* if the request was out-of-band (cf. {@link OAuth#OUT_OF_BAND}.
*
*
* The consumer used during token handshakes is now ready for signing.
*
*
* @see DefaultOAuthProvider
* @see DefaultOAuthConsumer
*/
public interface OAuthProvider extends Serializable {
/**
* Queries the service provider for a request token.
*
* Pre-conditions: the given {@link OAuthConsumer} must have a valid
* consumer key and consumer secret already set.
*
*
* Post-conditions: the given {@link OAuthConsumer} will have an
* unauthorized request token and token secret set.
*
*
* @param consumer
* the {@link OAuthConsumer} that should be used to sign the request
* @param callbackUrl
* Pass an actual URL if your app can receive callbacks and you want
* to get informed about the result of the authorization process.
* Pass {@link OAuth.OUT_OF_BAND} if the service provider implements
* OAuth 1.0a and your app cannot receive callbacks. Pass null if the
* service provider implements OAuth 1.0 and your app cannot receive
* callbacks. Please note that some services (among them Twitter)
* will fail authorization if you pass a callback URL but register
* your application as a desktop app (which would only be able to
* handle OOB requests).
* @return The URL to which the user must be sent in order to authorize the
* consumer. It includes the unauthorized request token (and in the
* case of OAuth 1.0, the callback URL -- 1.0a clients send along
* with the token request).
* @throws OAuthMessageSignerException
* if signing the request failed
* @throws OAuthNotAuthorizedException
* if the service provider rejected the consumer
* @throws OAuthExpectationFailedException
* if required parameters were not correctly set by the consumer or
* service provider
* @throws OAuthCommunicationException
* if server communication failed
*/
public String retrieveRequestToken(OAuthConsumer consumer, String callbackUrl)
throws OAuthMessageSignerException, OAuthNotAuthorizedException,
OAuthExpectationFailedException, OAuthCommunicationException;
/**
* Queries the service provider for an access token.
*
* Pre-conditions: the given {@link OAuthConsumer} must have a valid
* consumer key, consumer secret, authorized request token and token secret
* already set.
*
*
* Post-conditions: the given {@link OAuthConsumer} will have an
* access token and token secret set.
*
*
* @param consumer
* the {@link OAuthConsumer} that should be used to sign the request
* @param oauthVerifier
* NOTE: Only applies to service providers implementing OAuth
* 1.0a. Set to null if the service provider is still using OAuth
* 1.0. The verification code issued by the service provider
* after the the user has granted the consumer authorization. If the
* callback method provided in the previous step was
* {@link OAuth.OUT_OF_BAND}, then you must ask the user for this
* value. If your app has received a callback, the verfication code
* was passed as part of that request instead.
* @throws OAuthMessageSignerException
* if signing the request failed
* @throws OAuthNotAuthorizedException
* if the service provider rejected the consumer
* @throws OAuthExpectationFailedException
* if required parameters were not correctly set by the consumer or
* service provider
* @throws OAuthCommunicationException
* if server communication failed
*/
public void retrieveAccessToken(OAuthConsumer consumer, String oauthVerifier)
throws OAuthMessageSignerException, OAuthNotAuthorizedException,
OAuthExpectationFailedException, OAuthCommunicationException;
/**
* Any additional non-OAuth parameters returned in the response body of a
* token request can be obtained through this method. These parameters will
* be preserved until the next token request is issued. The return value is
* never null.
*/
public Map getResponseParameters();
/**
* Subclasses must use this setter to preserve any non-OAuth query
* parameters contained in the server response. It's the caller's
* responsibility that any OAuth parameters be removed beforehand.
*
* @param parameters
* the map of query parameters served by the service provider in the
* token response
*/
public void setResponseParameters(Map parameters);
/**
* Use this method to set custom HTTP headers to be used for the requests
* which are sent to retrieve tokens.
*
* @param header
* The header name (e.g. 'WWW-Authenticate')
* @param value
* The header value (e.g. 'realm=www.example.com')
*/
public void setRequestHeader(String header, String value);
/**
* @return all request headers set via {@link #setRequestHeader}
*/
public Map getRequestHeaders();
/**
* @param isOAuth10aProvider
* set to true if the service provider supports OAuth 1.0a. Note that
* you need only call this method if you reconstruct a provider
* object in between calls to retrieveRequestToken() and
* retrieveAccessToken() (i.e. if the object state isn't preserved).
* If instead those two methods are called on the same provider
* instance, this flag will be deducted automatically based on the
* server response during retrieveRequestToken(), so you can simply
* ignore this method.
*/
public void setOAuth10a(boolean isOAuth10aProvider);
/**
* @return true if the service provider supports OAuth 1.0a. Note that the
* value returned here is only meaningful after you have already
* performed the token handshake, otherwise there is no way to
* determine what version of the OAuth protocol the service provider
* implements.
*/
public boolean isOAuth10a();
public String getRequestTokenEndpointUrl();
public String getAccessTokenEndpointUrl();
public String getAuthorizationWebsiteUrl();
}