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1/*
2 *
3 * Copyright 2015 gRPC authors.
4 *
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
8 *
9 *     http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 *
17 */
18
19#import <objc/runtime.h>
20
21#import "GRPCCall+OAuth2.h"
22
23static NSString *const kAuthorizationHeader = @"authorization";
24static NSString *const kBearerPrefix = @"Bearer ";
25static NSString *const kChallengeHeader = @"www-authenticate";
26
27@implementation GRPCCall (OAuth2)
28@dynamic tokenProvider;
29
30- (NSString *)oauth2AccessToken {
31  NSString *headerValue = self.requestHeaders[kAuthorizationHeader];
32  if ([headerValue hasPrefix:kBearerPrefix]) {
33    return [headerValue substringFromIndex:kBearerPrefix.length];
34  } else {
35    return nil;
36  }
37}
38
39- (void)setOauth2AccessToken:(NSString *)token {
40  if (token) {
41    self.requestHeaders[kAuthorizationHeader] = [kBearerPrefix stringByAppendingString:token];
42  } else {
43    [self.requestHeaders removeObjectForKey:kAuthorizationHeader];
44  }
45}
46
47- (NSString *)oauth2ChallengeHeader {
48  return self.responseHeaders[kChallengeHeader];
49}
50
51- (void)setTokenProvider:(id<GRPCAuthorizationProtocol>)tokenProvider {
52  objc_setAssociatedObject(self, @selector(tokenProvider), tokenProvider, OBJC_ASSOCIATION_RETAIN);
53}
54
55- (id<GRPCAuthorizationProtocol>)tokenProvider {
56  return objc_getAssociatedObject(self, @selector(tokenProvider));
57}
58
59@end
60