move websocketurl plus sid to computed property

Author: nuclearace

Source/SocketEngine.swift

@@ -243,10 +243,7 @@ public final class SocketEngine: NSObject, SocketEnginePollable, SocketEngineWeb
     }
 
     private func createWebsocketAndConnect() {
-        let component = NSURLComponents(URL: urlWebSocket, resolvingAgainstBaseURL: false)!
-        component.query = component.query! + (sid == "" ? "" : "&sid=\(sid)")
-        
-        ws = WebSocket(url: component.URL!)
+        ws = WebSocket(url: urlWebSocketWithSid)
 
         if cookies != nil {
             let headers = NSHTTPCookie.requestHeaderFieldsWithCookies(cookies!)

Source/SocketEngineSpec.swift

@@ -67,6 +67,13 @@ extension SocketEngineSpec {
         return com.URL!
     }
 
+    var urlWebSocketWithSid: NSURL {
+        let com = NSURLComponents(URL: urlWebSocket, resolvingAgainstBaseURL: false)!
+        com.query = com.query! + (sid == "" ? "" : "&sid=\(sid)")
+        
+        return com.URL!
+    }
+    
     func createBinaryDataForSend(data: NSData) -> Either<NSData, String> {
         if websocket {
             var byteArray = [UInt8](count: 1, repeatedValue: 0x4)

Source/SocketIOClient.swift

@@ -413,7 +413,7 @@ public final class SocketIOClient: NSObject, SocketEngineClient, SocketParsable
         let id = NSUUID()
 
         let handler = SocketEventHandler(event: event, id: id) {[weak self] data, ack in
-            guard let this = self else {return}
+            guard let this = self else { return }
             this.off(id: id)
             callback(data, ack)
         }