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OAuth 2.0 SDK with OpenID Connection extensions for developing client and server applications.
There is a newer version: 11.20.1
/*
 * oauth2-oidc-sdk
 *
 * Copyright 2012-2016, Connect2id Ltd and contributors.
 *
 * 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.nimbusds.oauth2.sdk;


import com.nimbusds.common.contenttype.ContentType;
import com.nimbusds.oauth2.sdk.http.HTTPResponse;
import net.jcip.annotations.Immutable;
import net.minidev.json.JSONObject;

import java.util.Collections;
import java.util.HashSet;
import java.util.Objects;
import java.util.Set;


/**
 * OAuth 2.0 Token error response.
 *
 * Standard token errors:
 *
 * 

 *     {@link OAuth2Error#INVALID_REQUEST}
 *     
{@link OAuth2Error#INVALID_CLIENT}
 *     
{@link OAuth2Error#INVALID_GRANT}
 *     
{@link OAuth2Error#UNAUTHORIZED_CLIENT}
 *     
{@link OAuth2Error#UNSUPPORTED_GRANT_TYPE}
 *     
{@link OAuth2Error#INVALID_SCOPE}
 * 
 *
 * Example HTTP response:
 *
 * 
 * HTTP/1.1 400 Bad Request
 * Content-Type: application/json
 * Cache-Control: no-store
 * Pragma: no-cache
 * 
 * {
 *  "error": "invalid_request"
 * }
 * 
 *
 * Related specifications:
 *
 * 

 *     OAuth 2.0 (RFC 6749)
 * 
 */
@Immutable
public class TokenErrorResponse extends TokenResponse implements ErrorResponse {


	/**
	 * The standard OAuth 2.0 errors for an Access Token error response.
	 */
	private static final Set STANDARD_ERRORS;
	
	
	static {
		Set errors = new HashSet<>();
		errors.add(OAuth2Error.INVALID_REQUEST);
		errors.add(OAuth2Error.INVALID_CLIENT);
		errors.add(OAuth2Error.INVALID_GRANT);
		errors.add(OAuth2Error.UNAUTHORIZED_CLIENT);
		errors.add(OAuth2Error.UNSUPPORTED_GRANT_TYPE);
		errors.add(OAuth2Error.INVALID_SCOPE);
		STANDARD_ERRORS = Collections.unmodifiableSet(errors);
	}
	
	
	/**
	 * Gets the standard OAuth 2.0 errors for an Access Token error 
	 * response.
	 *
	 * @return The standard errors, as a read-only set.
	 */
	public static Set getStandardErrors() {
	
		return STANDARD_ERRORS;
	}
	
	
	/**
	 * The error.
	 */
	private final ErrorObject error;


	/**
	 * Creates a new OAuth 2.0 Access Token error response. No OAuth 2.0
	 * error is specified.
	 */
	protected TokenErrorResponse() {

		error = null;
	}
	
	
	/**
	 * Creates a new OAuth 2.0 Access Token error response.
	 *
	 * @param error The error. Should match one of the 
	 *              {@link #getStandardErrors standard errors} for a token 
	 *              error response. Must not be {@code null}.
	 */
	public TokenErrorResponse(final ErrorObject error) {
		this.error = Objects.requireNonNull(error);
	}


	@Override
	public boolean indicatesSuccess() {

		return false;
	}
	

	@Override
	public ErrorObject getErrorObject() {
	
		return error;
	}
	
	
	/**
	 * Returns the JSON object for this token error response.
	 *
	 * @return The JSON object for this token error response.
	 */
	public JSONObject toJSONObject() {
	
		JSONObject o = new JSONObject();

		// No error?
		if (error == null)
			return o;
		
		o.putAll(error.toJSONObject());
		
		return o;
	}
	
	
	@Override
	public HTTPResponse toHTTPResponse() {

		int statusCode = (error != null && error.getHTTPStatusCode() > 0) ?
			error.getHTTPStatusCode() : HTTPResponse.SC_BAD_REQUEST;

		HTTPResponse httpResponse = new HTTPResponse(statusCode);

		if (error == null)
			return httpResponse;
		
		httpResponse.setEntityContentType(ContentType.APPLICATION_JSON);
		httpResponse.setCacheControl("no-store");
		httpResponse.setPragma("no-cache");
		httpResponse.setBody(toJSONObject().toString());
		return httpResponse;
	}


	/**
	 * Parses an OAuth 2.0 Token Error response from the specified JSON
	 * object.
	 *
	 * @param jsonObject The JSON object to parse. Its status code must not
	 *                   be 200 (OK). Must not be {@code null}.
	 *
	 * @return The token error response.
	 *
	 * @throws ParseException If the JSON object couldn't be parsed to an 
	 *                        OAuth 2.0 Token Error response.
	 */
	public static TokenErrorResponse parse(final JSONObject jsonObject)
		throws ParseException {

		// No error code?
		if (! jsonObject.containsKey("error"))
			return new TokenErrorResponse();
		
		ErrorObject error = ErrorObject.parse(jsonObject).setHTTPStatusCode(HTTPResponse.SC_BAD_REQUEST);
		
		return new TokenErrorResponse(error);
	}
	
	
	/**
	 * Parses an OAuth 2.0 Token Error response from the specified HTTP
	 * response.
	 *
	 * @param httpResponse The HTTP response to parse. Its status code must
	 *                     not be 200 (OK). Must not be {@code null}.
	 *
	 * @return The token error response.
	 *
	 * @throws ParseException If the HTTP response couldn't be parsed to an 
	 *                        OAuth 2.0 Token Error response.
	 */
	public static TokenErrorResponse parse(final HTTPResponse httpResponse)
		throws ParseException {
		
		httpResponse.ensureStatusCodeNotOK();
		return new TokenErrorResponse(ErrorObject.parse(httpResponse));
	}
}