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/*
* Copyright 2014 The WebRTC Project Authors. All rights reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#import "ARDTURNClient+Internal.h"
#import "ARDUtilities.h"
#import "RTCIceServer+JSON.h"
// TODO(tkchin): move this to a configuration object.
static NSString *kTURNRefererURLString = @"https://appr.tc";
static NSString *kARDTURNClientErrorDomain = @"ARDTURNClient";
static NSInteger kARDTURNClientErrorBadResponse = -1;
@implementation ARDTURNClient {
NSURL *_url;
}
- (instancetype)initWithURL:(NSURL *)url {
NSParameterAssert([url absoluteString].length);
self = [super init];
if (self) {
_url = url;
}
return self;
}
- (void)requestServersWithCompletionHandler:
(void (^)(NSArray *turnServers, NSError *error))completionHandler {
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:_url];
[NSURLConnection
sendAsyncRequest:request
completionHandler:^(
NSURLResponse *response __unused, NSData *data, NSError *error) {
if (error) {
completionHandler(nil, error);
return;
}
NSDictionary *responseDict = [NSDictionary dictionaryWithJSONData:data];
NSString *iceServerUrl = responseDict[@"ice_server_url"];
[self makeTurnServerRequestToURL:[NSURL URLWithString:iceServerUrl]
WithCompletionHandler:completionHandler];
}];
}
#pragma mark - Private
- (void)makeTurnServerRequestToURL:(NSURL *)url
WithCompletionHandler:(void (^)(NSArray *turnServers,
NSError *error))completionHandler {
NSMutableURLRequest *iceServerRequest =
[NSMutableURLRequest requestWithURL:url];
iceServerRequest.HTTPMethod = @"POST";
[iceServerRequest addValue:kTURNRefererURLString
forHTTPHeaderField:@"referer"];
[NSURLConnection
sendAsyncRequest:iceServerRequest
completionHandler:^(
NSURLResponse *response __unused, NSData *data, NSError *error) {
if (error) {
completionHandler(nil, error);
return;
}
NSDictionary *turnResponseDict =
[NSDictionary dictionaryWithJSONData:data];
NSMutableArray *turnServers = [NSMutableArray array];
[turnResponseDict[@"iceServers"]
enumerateObjectsUsingBlock:^(NSDictionary *obj,
NSUInteger idx __unused,
BOOL *stop __unused) {
[turnServers addObject:[RTC_OBJC_TYPE(RTCIceServer)
serverFromJSONDictionary:obj]];
}];
if (!turnServers) {
NSError *responseError = [[NSError alloc]
initWithDomain:kARDTURNClientErrorDomain
code:kARDTURNClientErrorBadResponse
userInfo:@{
NSLocalizedDescriptionKey : @"Bad TURN response.",
}];
completionHandler(nil, responseError);
return;
}
completionHandler(turnServers, nil);
}];
}
@end
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