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/*
*
* Copyright 2015 gRPC 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.
*
*/
#import "GRPCCall.h"
/**
* The protocol of an OAuth2 token object from which GRPCCall can acquire a token.
*/
@protocol GRPCAuthorizationProtocol
- (void)getTokenWithHandler:(void (^)(NSString *token))hander;
@end
/** Helpers for setting and reading headers compatible with OAuth2. */
@interface GRPCCall (OAuth2)
/**
* Setting this property is equivalent to setting "Bearer <passed token>" as the value of the
* request header with key "authorization" (the authorization header). Setting it to nil removes the
* authorization header from the request.
* The value obtained by getting the property is the OAuth2 bearer token if the authorization header
* of the request has the form "Bearer <token>", or nil otherwise.
*/
@property(atomic, copy) NSString *oauth2AccessToken;
/** Returns the value (if any) of the "www-authenticate" response header (the challenge header). */
@property(atomic, readonly) NSString *oauth2ChallengeHeader;
/**
* The authorization token object to be used when starting the call. If the value is set to nil, no
* oauth authentication will be used.
*
* If tokenProvider exists, it takes precedence over the token set by oauth2AccessToken.
*/
@property(atomic, strong) id<GRPCAuthorizationProtocol> tokenProvider;
@end
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