always close fast. Don't handle acks after close

SocketIOClientSwift/SocketEngine.swift

@@ -102,19 +102,20 @@ public final class SocketEngine: NSObject, SocketEngineSpec, WebSocketDelegate {
         }
     }
 
-    public func close(fast fast: Bool) {
-        Logger.log("Engine is being closed. Fast: %@", type: logType, args: fast)
+    public func close() {
+        Logger.log("Engine is being closed.", type: logType)
 
         pingTimer?.invalidate()
         closed = true
 
-        ws?.disconnect()
-
-        if fast || polling {
-            write("", withType: .Close, withData: nil)
-            client?.engineDidClose("Disconnect")
+        if websocket {
+            sendWebSocketMessage("", withType: .Close)
+        } else {
+            sendPollMessage("", withType: .Close)
         }
         
+        ws?.disconnect()
+        client?.engineDidClose("Disconnect")
         stopPolling()
     }
 

SocketIOClientSwift/SocketEngineSpec.swift

@@ -35,7 +35,7 @@ import Foundation
     
     init(client: SocketEngineClient, opts: NSDictionary?)
     
-    func close(fast fast: Bool)
+    func close()
     func open(opts: [String: AnyObject]?)
     func send(msg: String, withData datas: [NSData]?)
     func write(msg: String, withType type: SocketEnginePacketType, withData data: [NSData]?)

SocketIOClientSwift/SocketIOClient.swift

@@ -169,7 +169,7 @@ public final class SocketIOClient: NSObject, SocketEngineClient {
             dispatch_after(time, handleQueue) {[weak self] in
                 if let this = self where this.status != .Connected {
                     this.status = .Closed
-                    this.engine?.close(fast: true)
+                    this.engine?.close()
                     
                     handler?()
                 }
@@ -218,7 +218,7 @@ public final class SocketIOClient: NSObject, SocketEngineClient {
         reconnects = false
         
         // Make sure the engine is actually dead.
-        engine?.close(fast: true)
+        engine?.close()
         handleEvent("disconnect", data: [reason], isInternalMessage: true)
     }
     
@@ -322,6 +322,8 @@ public final class SocketIOClient: NSObject, SocketEngineClient {
     
     // Called when the socket gets an ack for something it sent
     func handleAck(ack: Int, data: AnyObject?) {
+        guard status == .Connected else {return}
+        
         Logger.log("Handling ack: %@ with data: %@", type: logType, args: ack, data ?? "")
         
         ackHandlers.executeAck(ack,