examples/ios/AppRTCDemo/APPRTCAppClient.m - external/webrtc/stable/talk - Git at Google

 /*
  * libjingle
  * Copyright 2013, Google Inc.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
  *
  *  1. Redistributions of source code must retain the above copyright notice,
  *     this list of conditions and the following disclaimer.
  *  2. Redistributions in binary form must reproduce the above copyright notice,
  *     this list of conditions and the following disclaimer in the documentation
  *     and/or other materials provided with the distribution.
  *  3. The name of the author may not be used to endorse or promote products
  *     derived from this software without specific prior written permission.
  *
  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
  * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */

 #import "APPRTCAppClient.h"

 #import <dispatch/dispatch.h>

 #import "GAEChannelClient.h"
 #import "RTCICEServer.h"

 @interface APPRTCAppClient ()

 @property(nonatomic, strong) dispatch_queue_t backgroundQueue;
 @property(nonatomic, copy) NSString *baseURL;
 @property(nonatomic, strong) GAEChannelClient *gaeChannel;
 @property(nonatomic, copy) NSString *postMessageUrl;
 @property(nonatomic, copy) NSString *pcConfig;
 @property(nonatomic, strong) NSMutableString *roomHtml;
 @property(atomic, strong) NSMutableArray *sendQueue;
 @property(nonatomic, copy) NSString *token;

 @property(nonatomic, assign) BOOL verboseLogging;

 @end

 @implementation APPRTCAppClient

 @synthesize ICEServerDelegate = _ICEServerDelegate;
 @synthesize messageHandler = _messageHandler;

 @synthesize backgroundQueue = _backgroundQueue;
 @synthesize baseURL = _baseURL;
 @synthesize gaeChannel = _gaeChannel;
 @synthesize postMessageUrl = _postMessageUrl;
 @synthesize pcConfig = _pcConfig;
 @synthesize roomHtml = _roomHtml;
 @synthesize sendQueue = _sendQueue;
 @synthesize token = _token;
 @synthesize verboseLogging = _verboseLogging;

 - (id)init {
   if (self = [super init]) {
     _backgroundQueue = dispatch_queue_create("RTCBackgroundQueue", NULL);
     _sendQueue = [NSMutableArray array];
     // Uncomment to see Request/Response logging.
     // _verboseLogging = YES;
   }
   return self;
 }

 #pragma mark - Public methods

 - (void)connectToRoom:(NSURL *)url {
   NSURLRequest *request = [self getRequestFromUrl:url];
   [NSURLConnection connectionWithRequest:request delegate:self];
 }

 - (void)sendData:(NSData *)data {
   @synchronized(self) {
     [self maybeLogMessage:@"Send message"];
     [self.sendQueue addObject:[data copy]];
   }
   [self requestQueueDrainInBackground];
 }

 #pragma mark - Internal methods

 - (NSString*)findVar:(NSString*)name
      strippingQuotes:(BOOL)strippingQuotes {
   NSError* error;
   NSString* pattern =
       [NSString stringWithFormat:@".*\n *var %@ = ([^\n]*);\n.*", name];
   NSRegularExpression *regexp =
       [NSRegularExpression regularExpressionWithPattern:pattern
                                                 options:0
                                                   error:&error];
   NSAssert(!error, @"Unexpected error compiling regex: ",
            error.localizedDescription);

   NSRange fullRange = NSMakeRange(0, [self.roomHtml length]);
   NSArray *matches =
       [regexp matchesInString:self.roomHtml options:0 range:fullRange];
   if ([matches count] != 1) {
     [self showMessage:[NSString stringWithFormat:@"%d matches for %@ in %@",
                                 [matches count], name, self.roomHtml]];
     return nil;
   }
   NSRange matchRange = [matches[0] rangeAtIndex:1];
   NSString* value = [self.roomHtml substringWithRange:matchRange];
   if (strippingQuotes) {
     NSAssert([value length] > 2,
              @"Can't strip quotes from short string: [%@]", value);
     NSAssert(([value characterAtIndex:0] == '\'' &&
               [value characterAtIndex:[value length] - 1] == '\''),
              @"Can't strip quotes from unquoted string: [%@]", value);
     value = [value substringWithRange:NSMakeRange(1, [value length] - 2)];
   }
   return value;
 }

 - (NSURLRequest *)getRequestFromUrl:(NSURL *)url {
   self.roomHtml = [NSMutableString stringWithCapacity:20000];
   NSString *path =
       [NSString stringWithFormat:@"https:%@", [url resourceSpecifier]];
   NSURLRequest *request =
       [NSURLRequest requestWithURL:[NSURL URLWithString:path]];
   return request;
 }

 - (void)maybeLogMessage:(NSString *)message {
   if (self.verboseLogging) {
     NSLog(@"%@", message);
   }
 }

 - (void)requestQueueDrainInBackground {
   dispatch_async(self.backgroundQueue, ^(void) {
     // TODO(hughv): This can block the UI thread.  Fix.
     @synchronized(self) {
       if ([self.postMessageUrl length] < 1) {
         return;
       }
       for (NSData *data in self.sendQueue) {
         NSString *url = [NSString stringWithFormat:@"%@/%@",
                          self.baseURL,
                          self.postMessageUrl];
         [self sendData:data withUrl:url];
       }
       [self.sendQueue removeAllObjects];
     }
   });
 }

 - (void)sendData:(NSData *)data withUrl:(NSString *)url {
   NSMutableURLRequest *request =
       [NSMutableURLRequest requestWithURL:[NSURL URLWithString:url]];
   request.HTTPMethod = @"POST";
   [request setHTTPBody:data];
   NSURLResponse *response;
   NSError *error;
   NSData *responseData = [NSURLConnection sendSynchronousRequest:request
                                                returningResponse:&response
                                                            error:&error];
   NSHTTPURLResponse *httpResponse = (NSHTTPURLResponse *)response;
   int status = [httpResponse statusCode];
   NSAssert(status == 200,
            @"Bad response [%d] to message: %@\n\n%@",
            status,
            [NSString stringWithUTF8String:[data bytes]],
            [NSString stringWithUTF8String:[responseData bytes]]);
 }

 - (void)showMessage:(NSString *)message {
   NSLog(@"%@", message);
   UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"Unable to join"
                                                       message:message
                                                      delegate:nil
                                             cancelButtonTitle:@"OK"
                                             otherButtonTitles:nil];
   [alertView show];
 }

 - (void)updateICEServers:(NSMutableArray *)ICEServers
           withTurnServer:(NSString *)turnServerUrl {
   if ([turnServerUrl length] < 1) {
     [self.ICEServerDelegate onICEServers:ICEServers];
     return;
   }
   dispatch_async(self.backgroundQueue, ^(void) {
     NSMutableURLRequest *request = [NSMutableURLRequest
         requestWithURL:[NSURL URLWithString:turnServerUrl]];
     [request addValue:@"Mozilla/5.0" forHTTPHeaderField:@"user-agent"];
     [request addValue:@"https://apprtc.appspot.com"
         forHTTPHeaderField:@"origin"];
     NSURLResponse *response;
     NSError *error;
     NSData *responseData = [NSURLConnection sendSynchronousRequest:request
                                                  returningResponse:&response
                                                              error:&error];
     if (!error) {
       NSDictionary *json = [NSJSONSerialization JSONObjectWithData:responseData
                                                            options:0
                                                              error:&error];
       NSAssert(!error, @"Unable to parse.  %@", error.localizedDescription);
       NSString *username = json[@"username"];
       NSString *password = json[@"password"];
       NSArray* uris = json[@"uris"];
       for (int i = 0; i < [uris count]; ++i) {
         NSString *turnServer = [uris objectAtIndex:i];
         RTCICEServer *ICEServer =
           [[RTCICEServer alloc] initWithURI:[NSURL URLWithString:turnServer]
                                    username:username
                                    password:password];
         NSLog(@"Added ICE Server: %@", ICEServer);
         [ICEServers addObject:ICEServer];
       }
     } else {
       NSLog(@"Unable to get TURN server.  Error: %@", error.description);
     }

     dispatch_async(dispatch_get_main_queue(), ^(void) {
       [self.ICEServerDelegate onICEServers:ICEServers];
     });
   });
 }

 #pragma mark - NSURLConnectionDataDelegate methods

 - (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data {
   NSString *roomHtml = [NSString stringWithUTF8String:[data bytes]];
   [self maybeLogMessage:
           [NSString stringWithFormat:@"Received %d chars", [roomHtml length]]];
   [self.roomHtml appendString:roomHtml];
 }

 - (void)connection:(NSURLConnection *)connection
     didReceiveResponse:(NSURLResponse *)response {
   NSHTTPURLResponse *httpResponse = (NSHTTPURLResponse *)response;
   int statusCode = [httpResponse statusCode];
   [self maybeLogMessage:
           [NSString stringWithFormat:
                   @"Response received\nURL\n%@\nStatus [%d]\nHeaders\n%@",
               [httpResponse URL],
               statusCode,
               [httpResponse allHeaderFields]]];
   NSAssert(statusCode == 200, @"Invalid response  of %d received.", statusCode);
 }

 - (void)connectionDidFinishLoading:(NSURLConnection *)connection {
   [self maybeLogMessage:[NSString stringWithFormat:@"finished loading %d chars",
                          [self.roomHtml length]]];
   NSRegularExpression* fullRegex =
     [NSRegularExpression regularExpressionWithPattern:@"room is full"
                                               options:0
                                                 error:nil];
   if ([fullRegex
           numberOfMatchesInString:self.roomHtml
                           options:0
                             range:NSMakeRange(0, [self.roomHtml length])]) {
     [self showMessage:@"Room full"];
     return;
   }


   NSString *fullUrl = [[[connection originalRequest] URL] absoluteString];
   NSRange queryRange = [fullUrl rangeOfString:@"?"];
   self.baseURL = [fullUrl substringToIndex:queryRange.location];
   [self maybeLogMessage:
       [NSString stringWithFormat:@"Base URL: %@", self.baseURL]];

   self.token = [self findVar:@"channelToken" strippingQuotes:YES];
   if (!self.token)
     return;
   [self maybeLogMessage:[NSString stringWithFormat:@"Token: %@", self.token]];

   NSString* roomKey = [self findVar:@"roomKey" strippingQuotes:YES];
   NSString* me = [self findVar:@"me" strippingQuotes:YES];
   if (!roomKey || !me)
     return;
   self.postMessageUrl =
     [NSString stringWithFormat:@"/message?r=%@&u=%@", roomKey, me];
   [self maybeLogMessage:[NSString stringWithFormat:@"POST message URL: %@",
                                   self.postMessageUrl]];

   NSString* pcConfig = [self findVar:@"pcConfig" strippingQuotes:NO];
   if (!pcConfig)
     return;
   [self maybeLogMessage:
           [NSString stringWithFormat:@"PC Config JSON: %@", pcConfig]];

   NSString *turnServerUrl = [self findVar:@"turnUrl" strippingQuotes:YES];
   if (turnServerUrl) {
     [self maybeLogMessage:
             [NSString stringWithFormat:@"TURN server request URL: %@",
                 turnServerUrl]];
   }

   NSError *error;
   NSData *pcData = [pcConfig dataUsingEncoding:NSUTF8StringEncoding];
   NSDictionary *json =
       [NSJSONSerialization JSONObjectWithData:pcData options:0 error:&error];
   NSAssert(!error, @"Unable to parse.  %@", error.localizedDescription);
   NSArray *servers = [json objectForKey:@"iceServers"];
   NSMutableArray *ICEServers = [NSMutableArray array];
   for (NSDictionary *server in servers) {
     NSString *url = [server objectForKey:@"url"];
     NSString *username = json[@"username"];
     NSString *credential = [server objectForKey:@"credential"];
     if (!username) {
       username = @"";
     }
     if (!credential) {
       credential = @"";
     }
     [self maybeLogMessage:
             [NSString stringWithFormat:@"url [%@] - credential [%@]",
                 url,
                 credential]];
     RTCICEServer *ICEServer =
         [[RTCICEServer alloc] initWithURI:[NSURL URLWithString:url]
                                  username:username
                                  password:credential];
     NSLog(@"Added ICE Server: %@", ICEServer);
     [ICEServers addObject:ICEServer];
   }
   [self updateICEServers:ICEServers withTurnServer:turnServerUrl];

   [self maybeLogMessage:
           [NSString stringWithFormat:@"About to open GAE with token:  %@",
               self.token]];
   self.gaeChannel =
       [[GAEChannelClient alloc] initWithToken:self.token
                                      delegate:self.messageHandler];
 }

 @end
	/*
	* libjingle
	* Copyright 2013, Google Inc.
	*
	* Redistribution and use in source and binary forms, with or without
	* modification, are permitted provided that the following conditions are met:
	*
	* 1. Redistributions of source code must retain the above copyright notice,
	* this list of conditions and the following disclaimer.
	* 2. Redistributions in binary form must reproduce the above copyright notice,
	* this list of conditions and the following disclaimer in the documentation
	* and/or other materials provided with the distribution.
	* 3. The name of the author may not be used to endorse or promote products
	* derived from this software without specific prior written permission.
	*
	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
	* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
	* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
	* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
	* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
	* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
	* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
	* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
	* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
	* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
	*/

	#import "APPRTCAppClient.h"

	#import <dispatch/dispatch.h>

	#import "GAEChannelClient.h"
	#import "RTCICEServer.h"

	@interface APPRTCAppClient ()

	@property(nonatomic, strong) dispatch_queue_t backgroundQueue;
	@property(nonatomic, copy) NSString *baseURL;
	@property(nonatomic, strong) GAEChannelClient *gaeChannel;
	@property(nonatomic, copy) NSString *postMessageUrl;
	@property(nonatomic, copy) NSString *pcConfig;
	@property(nonatomic, strong) NSMutableString *roomHtml;
	@property(atomic, strong) NSMutableArray *sendQueue;
	@property(nonatomic, copy) NSString *token;

	@property(nonatomic, assign) BOOL verboseLogging;

	@end

	@implementation APPRTCAppClient

	@synthesize ICEServerDelegate = _ICEServerDelegate;
	@synthesize messageHandler = _messageHandler;

	@synthesize backgroundQueue = _backgroundQueue;
	@synthesize baseURL = _baseURL;
	@synthesize gaeChannel = _gaeChannel;
	@synthesize postMessageUrl = _postMessageUrl;
	@synthesize pcConfig = _pcConfig;
	@synthesize roomHtml = _roomHtml;
	@synthesize sendQueue = _sendQueue;
	@synthesize token = _token;
	@synthesize verboseLogging = _verboseLogging;

	- (id)init {
	if (self = [super init]) {
	_backgroundQueue = dispatch_queue_create("RTCBackgroundQueue", NULL);
	_sendQueue = [NSMutableArray array];
	// Uncomment to see Request/Response logging.
	// _verboseLogging = YES;
	}
	return self;
	}

	#pragma mark - Public methods

	- (void)connectToRoom:(NSURL *)url {
	NSURLRequest *request = [self getRequestFromUrl:url];
	[NSURLConnection connectionWithRequest:request delegate:self];
	}

	- (void)sendData:(NSData *)data {
	@synchronized(self) {
	[self maybeLogMessage:@"Send message"];
	[self.sendQueue addObject:[data copy]];
	}
	[self requestQueueDrainInBackground];
	}

	#pragma mark - Internal methods

	- (NSString)findVar:(NSString)name
	strippingQuotes:(BOOL)strippingQuotes {
	NSError* error;
	NSString* pattern =
	[NSString stringWithFormat:@".\n var %@ = ([^\n]);\n.", name];
	NSRegularExpression *regexp =
	[NSRegularExpression regularExpressionWithPattern:pattern
	options:0
	error:&error];
	NSAssert(!error, @"Unexpected error compiling regex: ",
	error.localizedDescription);

	NSRange fullRange = NSMakeRange(0, [self.roomHtml length]);
	NSArray *matches =
	[regexp matchesInString:self.roomHtml options:0 range:fullRange];
	if ([matches count] != 1) {
	[self showMessage:[NSString stringWithFormat:@"%d matches for %@ in %@",
	[matches count], name, self.roomHtml]];
	return nil;
	}
	NSRange matchRange = [matches[0] rangeAtIndex:1];
	NSString* value = [self.roomHtml substringWithRange:matchRange];
	if (strippingQuotes) {
	NSAssert([value length] > 2,
	@"Can't strip quotes from short string: [%@]", value);
	NSAssert(([value characterAtIndex:0] == '\'' &&
	[value characterAtIndex:[value length] - 1] == '\''),
	@"Can't strip quotes from unquoted string: [%@]", value);
	value = [value substringWithRange:NSMakeRange(1, [value length] - 2)];
	}
	return value;
	}

	- (NSURLRequest )getRequestFromUrl:(NSURL )url {
	self.roomHtml = [NSMutableString stringWithCapacity:20000];
	NSString *path =
	[NSString stringWithFormat:@"https:%@", [url resourceSpecifier]];
	NSURLRequest *request =
	[NSURLRequest requestWithURL:[NSURL URLWithString:path]];
	return request;
	}

	- (void)maybeLogMessage:(NSString *)message {
	if (self.verboseLogging) {
	NSLog(@"%@", message);
	}
	}

	- (void)requestQueueDrainInBackground {
	dispatch_async(self.backgroundQueue, ^(void) {
	// TODO(hughv): This can block the UI thread. Fix.
	@synchronized(self) {
	if ([self.postMessageUrl length] < 1) {
	return;
	}
	for (NSData *data in self.sendQueue) {
	NSString *url = [NSString stringWithFormat:@"%@/%@",
	self.baseURL,
	self.postMessageUrl];
	[self sendData:data withUrl:url];
	}
	[self.sendQueue removeAllObjects];
	}
	});
	}

	- (void)sendData:(NSData )data withUrl:(NSString )url {
	NSMutableURLRequest *request =
	[NSMutableURLRequest requestWithURL:[NSURL URLWithString:url]];
	request.HTTPMethod = @"POST";
	[request setHTTPBody:data];
	NSURLResponse *response;
	NSError *error;
	NSData *responseData = [NSURLConnection sendSynchronousRequest:request
	returningResponse:&response
	error:&error];
	NSHTTPURLResponse httpResponse = (NSHTTPURLResponse )response;
	int status = [httpResponse statusCode];
	NSAssert(status == 200,
	@"Bad response [%d] to message: %@\n\n%@",
	status,
	[NSString stringWithUTF8String:[data bytes]],
	[NSString stringWithUTF8String:[responseData bytes]]);
	}

	- (void)showMessage:(NSString *)message {
	NSLog(@"%@", message);
	UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"Unable to join"
	message:message
	delegate:nil
	cancelButtonTitle:@"OK"
	otherButtonTitles:nil];
	[alertView show];
	}

	- (void)updateICEServers:(NSMutableArray *)ICEServers
	withTurnServer:(NSString *)turnServerUrl {
	if ([turnServerUrl length] < 1) {
	[self.ICEServerDelegate onICEServers:ICEServers];
	return;
	}
	dispatch_async(self.backgroundQueue, ^(void) {
	NSMutableURLRequest *request = [NSMutableURLRequest
	requestWithURL:[NSURL URLWithString:turnServerUrl]];
	[request addValue:@"Mozilla/5.0" forHTTPHeaderField:@"user-agent"];
	[request addValue:@"https://apprtc.appspot.com"
	forHTTPHeaderField:@"origin"];
	NSURLResponse *response;
	NSError *error;
	NSData *responseData = [NSURLConnection sendSynchronousRequest:request
	returningResponse:&response
	error:&error];
	if (!error) {
	NSDictionary *json = [NSJSONSerialization JSONObjectWithData:responseData
	options:0
	error:&error];
	NSAssert(!error, @"Unable to parse. %@", error.localizedDescription);
	NSString *username = json[@"username"];
	NSString *password = json[@"password"];
	NSArray* uris = json[@"uris"];
	for (int i = 0; i < [uris count]; ++i) {
	NSString *turnServer = [uris objectAtIndex:i];
	RTCICEServer *ICEServer =
	[[RTCICEServer alloc] initWithURI:[NSURL URLWithString:turnServer]
	username:username
	password:password];
	NSLog(@"Added ICE Server: %@", ICEServer);
	[ICEServers addObject:ICEServer];
	}
	} else {
	NSLog(@"Unable to get TURN server. Error: %@", error.description);
	}

	dispatch_async(dispatch_get_main_queue(), ^(void) {
	[self.ICEServerDelegate onICEServers:ICEServers];
	});
	});
	}

	#pragma mark - NSURLConnectionDataDelegate methods

	- (void)connection:(NSURLConnection )connection didReceiveData:(NSData )data {
	NSString *roomHtml = [NSString stringWithUTF8String:[data bytes]];
	[self maybeLogMessage:
	[NSString stringWithFormat:@"Received %d chars", [roomHtml length]]];
	[self.roomHtml appendString:roomHtml];
	}

	- (void)connection:(NSURLConnection *)connection
	didReceiveResponse:(NSURLResponse *)response {
	NSHTTPURLResponse httpResponse = (NSHTTPURLResponse )response;
	int statusCode = [httpResponse statusCode];
	[self maybeLogMessage:
	[NSString stringWithFormat:
	@"Response received\nURL\n%@\nStatus [%d]\nHeaders\n%@",
	[httpResponse URL],
	statusCode,
	[httpResponse allHeaderFields]]];
	NSAssert(statusCode == 200, @"Invalid response of %d received.", statusCode);
	}

	- (void)connectionDidFinishLoading:(NSURLConnection *)connection {
	[self maybeLogMessage:[NSString stringWithFormat:@"finished loading %d chars",
	[self.roomHtml length]]];
	NSRegularExpression* fullRegex =
	[NSRegularExpression regularExpressionWithPattern:@"room is full"
	options:0
	error:nil];
	if ([fullRegex
	numberOfMatchesInString:self.roomHtml
	options:0
	range:NSMakeRange(0, [self.roomHtml length])]) {
	[self showMessage:@"Room full"];
	return;
	}


	NSString *fullUrl = [[[connection originalRequest] URL] absoluteString];
	NSRange queryRange = [fullUrl rangeOfString:@"?"];
	self.baseURL = [fullUrl substringToIndex:queryRange.location];
	[self maybeLogMessage:
	[NSString stringWithFormat:@"Base URL: %@", self.baseURL]];

	self.token = [self findVar:@"channelToken" strippingQuotes:YES];
	if (!self.token)
	return;
	[self maybeLogMessage:[NSString stringWithFormat:@"Token: %@", self.token]];

	NSString* roomKey = [self findVar:@"roomKey" strippingQuotes:YES];
	NSString* me = [self findVar:@"me" strippingQuotes:YES];
	if (!roomKey \|\| !me)
	return;
	self.postMessageUrl =
	[NSString stringWithFormat:@"/message?r=%@&u=%@", roomKey, me];
	[self maybeLogMessage:[NSString stringWithFormat:@"POST message URL: %@",
	self.postMessageUrl]];

	NSString* pcConfig = [self findVar:@"pcConfig" strippingQuotes:NO];
	if (!pcConfig)
	return;
	[self maybeLogMessage:
	[NSString stringWithFormat:@"PC Config JSON: %@", pcConfig]];

	NSString *turnServerUrl = [self findVar:@"turnUrl" strippingQuotes:YES];
	if (turnServerUrl) {
	[self maybeLogMessage:
	[NSString stringWithFormat:@"TURN server request URL: %@",
	turnServerUrl]];
	}

	NSError *error;
	NSData *pcData = [pcConfig dataUsingEncoding:NSUTF8StringEncoding];
	NSDictionary *json =
	[NSJSONSerialization JSONObjectWithData:pcData options:0 error:&error];
	NSAssert(!error, @"Unable to parse. %@", error.localizedDescription);
	NSArray *servers = [json objectForKey:@"iceServers"];
	NSMutableArray *ICEServers = [NSMutableArray array];
	for (NSDictionary *server in servers) {
	NSString *url = [server objectForKey:@"url"];
	NSString *username = json[@"username"];
	NSString *credential = [server objectForKey:@"credential"];
	if (!username) {
	username = @"";
	}
	if (!credential) {
	credential = @"";
	}
	[self maybeLogMessage:
	[NSString stringWithFormat:@"url [%@] - credential [%@]",
	url,
	credential]];
	RTCICEServer *ICEServer =
	[[RTCICEServer alloc] initWithURI:[NSURL URLWithString:url]
	username:username
	password:credential];
	NSLog(@"Added ICE Server: %@", ICEServer);
	[ICEServers addObject:ICEServer];
	}
	[self updateICEServers:ICEServers withTurnServer:turnServerUrl];

	[self maybeLogMessage:
	[NSString stringWithFormat:@"About to open GAE with token: %@",
	self.token]];
	self.gaeChannel =
	[[GAEChannelClient alloc] initWithToken:self.token
	delegate:self.messageHandler];
	}

	@end