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1 /* | |
2 * libjingle | |
3 * Copyright 2014 Google Inc. | |
4 * | |
5 * Redistribution and use in source and binary forms, with or without | |
6 * modification, are permitted provided that the following conditions are met: | |
7 * | |
8 * 1. Redistributions of source code must retain the above copyright notice, | |
9 * this list of conditions and the following disclaimer. | |
10 * 2. Redistributions in binary form must reproduce the above copyright notice, | |
11 * this list of conditions and the following disclaimer in the documentation | |
12 * and/or other materials provided with the distribution. | |
13 * 3. The name of the author may not be used to endorse or promote products | |
14 * derived from this software without specific prior written permission. | |
15 * | |
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED | |
17 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
18 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO | |
19 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
20 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, | |
21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; | |
22 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, | |
23 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR | |
24 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF | |
25 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
26 */ | |
27 | |
28 #import "ARDCEODTURNClient.h" | |
29 | |
30 #import "ARDUtilities.h" | |
31 #import "RTCICEServer+JSON.h" | |
32 | |
33 // TODO(tkchin): move this to a configuration object. | |
34 static NSString *kTURNOriginURLString = @"https://apprtc.appspot.com"; | |
35 static NSString *kARDCEODTURNClientErrorDomain = @"ARDCEODTURNClient"; | |
36 static NSInteger kARDCEODTURNClientErrorBadResponse = -1; | |
37 | |
38 @implementation ARDCEODTURNClient { | |
39 NSURL *_url; | |
40 } | |
41 | |
42 - (instancetype)initWithURL:(NSURL *)url { | |
43 NSParameterAssert([url absoluteString].length); | |
44 if (self = [super init]) { | |
45 _url = url; | |
46 } | |
47 return self; | |
48 } | |
49 | |
50 - (void)requestServersWithCompletionHandler: | |
51 (void (^)(NSArray *turnServers, | |
52 NSError *error))completionHandler { | |
53 NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:_url]; | |
54 // We need to set origin because TURN provider whitelists requests based on | |
55 // origin. | |
56 [request addValue:@"Mozilla/5.0" forHTTPHeaderField:@"user-agent"]; | |
57 [request addValue:kTURNOriginURLString forHTTPHeaderField:@"origin"]; | |
58 [NSURLConnection sendAsyncRequest:request | |
59 completionHandler:^(NSURLResponse *response, | |
60 NSData *data, | |
61 NSError *error) { | |
62 NSArray *turnServers = [NSArray array]; | |
63 if (error) { | |
64 completionHandler(turnServers, error); | |
65 return; | |
66 } | |
67 NSDictionary *dict = [NSDictionary dictionaryWithJSONData:data]; | |
68 turnServers = [RTCICEServer serversFromCEODJSONDictionary:dict]; | |
69 if (!turnServers) { | |
70 NSError *responseError = | |
71 [[NSError alloc] initWithDomain:kARDCEODTURNClientErrorDomain | |
72 code:kARDCEODTURNClientErrorBadResponse | |
73 userInfo:@{ | |
74 NSLocalizedDescriptionKey: @"Bad TURN response.", | |
75 }]; | |
76 completionHandler(turnServers, responseError); | |
77 return; | |
78 } | |
79 completionHandler(turnServers, nil); | |
80 }]; | |
81 } | |
82 | |
83 @end | |
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