DefaultAuthorizationRequestUriBuilder.java

/*
 * Copyright 2012-2017 the original author or authors.
 *
 * 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.springframework.security.oauth2.client.authentication;

import org.springframework.security.oauth2.core.endpoint.AuthorizationRequestAttributes;
import org.springframework.security.oauth2.core.endpoint.OAuth2Parameter;
import org.springframework.security.oauth2.core.endpoint.ResponseType;
import org.springframework.web.util.UriComponentsBuilder;

import java.net.URI;
import java.util.stream.Collectors;

/**
 * The default implementation of an {@link AuthorizationRequestUriBuilder},
 * which internally uses an {@link UriComponentsBuilder} to construct the <i>OAuth 2.0 Authorization Request</i>.
 *
 * @author Joe Grandja
 * @since 5.0
 * @see AuthorizationRequestAttributes
 * @see <a target="_blank" href="https://tools.ietf.org/html/rfc6749#section-4.1.1">Section 4.1.1 Authorization Request</a>
 */
public class DefaultAuthorizationRequestUriBuilder implements AuthorizationRequestUriBuilder {

	@Override
	public URI build(AuthorizationRequestAttributes authorizationRequestAttributes) {
		UriComponentsBuilder uriBuilder = UriComponentsBuilder
				.fromUriString(authorizationRequestAttributes.getAuthorizeUri())
				.queryParam(OAuth2Parameter.RESPONSE_TYPE, ResponseType.CODE.value());
		if (authorizationRequestAttributes.getRedirectUri() != null) {
			uriBuilder.queryParam(OAuth2Parameter.REDIRECT_URI, authorizationRequestAttributes.getRedirectUri());
		}
		uriBuilder
				.queryParam(OAuth2Parameter.CLIENT_ID, authorizationRequestAttributes.getClientId())
				.queryParam(OAuth2Parameter.SCOPE,
						authorizationRequestAttributes.getScopes().stream().collect(Collectors.joining(" ")))
				.queryParam(OAuth2Parameter.STATE, authorizationRequestAttributes.getState());

		return uriBuilder.build().encode().toUri();
	}
}