fixes connect/disconnect problems #46

Author: pkyeck

SocketIO.h

@@ -75,6 +75,8 @@ typedef enum {
     BOOL _isConnecting;
     BOOL _useSecure;
 
+    NSURLConnection *_handshake;
+    
     // heartbeat
     NSTimeInterval _heartbeatTimeout;
     NSTimer *_timeout;

SocketIO.m

@@ -138,21 +138,26 @@ - (void) connectToHost:(NSString *)host onPort:(NSInteger)port withParams:(NSDic
                                                  cachePolicy:NSURLRequestReloadIgnoringLocalAndRemoteCacheData 
                                              timeoutInterval:10.0];
 
-        NSURLConnection *connection = [NSURLConnection connectionWithRequest:request 
-                                                                    delegate:self];
-        if (connection) {
+        _handshake = [NSURLConnection connectionWithRequest:request 
+                                                   delegate:self];
+        if (_handshake) {
             _httpRequestData = [NSMutableData data];
         }
         else {
             // connection failed
-            [self connection:connection didFailWithError:nil];
+            [self connection:_handshake didFailWithError:nil];
         }
     }
 }
 
 - (void) disconnect
 {
-    [self sendDisconnect];
+    if (_isConnected) {
+        [self sendDisconnect];
+    }
+    else if (_isConnecting) {
+        [_handshake cancel];
+    }
 }
 
 - (void) sendMessage:(NSString *)data