Fixed LocalFileMonitor dir not refreshing, Fixed FTP connection refused error by retrying

Sources/FPSStreamTask.swift

@@ -790,10 +790,27 @@ public class FileProviderStreamTask: URLSessionTask, StreamDelegate {
         }
     }
     
+    private var _retriesForInputStream: Int = 0
+    private var _retriesForOutputStream: Int = 0
     open func stream(_ aStream: Stream, handle eventCode: Stream.Event) {
         if eventCode.contains(.errorOccurred) {
-            self._error = aStream.streamError
-            streamDelegate?.urlSession?(_underlyingSession, task: self, didCompleteWithError: error)
+            let retries: Int
+            if aStream == self.inputStream {
+                retries = _retriesForInputStream
+                _retriesForInputStream += 1
+            } else if aStream == self.outputStream {
+                retries = _retriesForOutputStream
+                _retriesForOutputStream += 1
+            } else {
+                return
+            }
+            
+            if retries < 3 {
+                aStream.open()
+            } else {
+                self._error = aStream.streamError
+                streamDelegate?.urlSession?(_underlyingSession, task: self, didCompleteWithError: error)
+            }
         }
         
         if aStream == self.inputStream && eventCode.contains(.hasBytesAvailable) {

Sources/LocalHelper.swift

@@ -101,7 +101,9 @@ public final class LocalFileMonitor {
     public init(url: URL, handler: @escaping ()->Void) {
         self.url = url
         descriptor = open((url.absoluteURL as NSURL).fileSystemRepresentation, O_EVTONLY)
-        source = DispatchSource.makeFileSystemObjectSource(fileDescriptor: descriptor, eventMask: [.write, .extend, .attrib, .delete, .rename], queue: qq)
+        let event: DispatchSource.FileSystemEvent = url.fileIsDirectory ? [.write] : .all
+        source = DispatchSource.makeFileSystemObjectSource(fileDescriptor: descriptor, eventMask: event, queue: qq)
+        
         // Folder monitoring is recursive and deep. Monitoring a root folder may be very costly
         // We have a 0.2 second delay to ensure we wont call handler 1000s times when there is
         // a huge file operation. This ensures app will work smoothly while this 250 milisec won't