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1 /* | |
2 * Copyright 2014 The WebRTC Project Authors. All rights reserved. | |
3 * | |
4 * Use of this source code is governed by a BSD-style license | |
5 * that can be found in the LICENSE file in the root of the source | |
6 * tree. An additional intellectual property rights grant can be found | |
7 * in the file PATENTS. All contributing project authors may | |
8 * be found in the AUTHORS file in the root of the source tree. | |
9 */ | |
10 | |
11 #import "ARDCEODTURNClient.h" | |
12 | |
13 #import "ARDUtilities.h" | |
14 #import "RTCIceServer+JSON.h" | |
15 | |
16 // TODO(tkchin): move this to a configuration object. | |
17 static NSString *kTURNOriginURLString = @"https://apprtc.appspot.com"; | |
18 static NSString *kARDCEODTURNClientErrorDomain = @"ARDCEODTURNClient"; | |
19 static NSInteger kARDCEODTURNClientErrorBadResponse = -1; | |
20 | |
21 @implementation ARDCEODTURNClient { | |
22 NSURL *_url; | |
23 } | |
24 | |
25 - (instancetype)initWithURL:(NSURL *)url { | |
26 NSParameterAssert([url absoluteString].length); | |
27 if (self = [super init]) { | |
28 _url = url; | |
29 } | |
30 return self; | |
31 } | |
32 | |
33 - (void)requestServersWithCompletionHandler: | |
34 (void (^)(NSArray *turnServers, | |
35 NSError *error))completionHandler { | |
36 NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:_url]; | |
37 // We need to set origin because TURN provider whitelists requests based on | |
38 // origin. | |
39 [request addValue:@"Mozilla/5.0" forHTTPHeaderField:@"user-agent"]; | |
40 [request addValue:kTURNOriginURLString forHTTPHeaderField:@"origin"]; | |
41 [NSURLConnection sendAsyncRequest:request | |
42 completionHandler:^(NSURLResponse *response, | |
43 NSData *data, | |
44 NSError *error) { | |
45 NSArray *turnServers = [NSArray array]; | |
46 if (error) { | |
47 completionHandler(nil, error); | |
48 return; | |
49 } | |
50 NSDictionary *dict = [NSDictionary dictionaryWithJSONData:data]; | |
51 turnServers = @[ [RTCIceServer serverFromCEODJSONDictionary:dict] ]; | |
52 if (!turnServers) { | |
53 NSError *responseError = | |
54 [[NSError alloc] initWithDomain:kARDCEODTURNClientErrorDomain | |
55 code:kARDCEODTURNClientErrorBadResponse | |
56 userInfo:@{ | |
57 NSLocalizedDescriptionKey: @"Bad TURN response.", | |
58 }]; | |
59 completionHandler(turnServers, responseError); | |
60 return; | |
61 } | |
62 completionHandler(turnServers, nil); | |
63 }]; | |
64 } | |
65 | |
66 @end | |
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