Amir Abbas
746 lines
30 KiB
Swift
746 lines
30 KiB
Swift
//
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// FPSStreamTask.swift
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// FileProvider
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//
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// Created by Amir Abbas Mousavian.
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// Copyright © 2016 Mousavian. Distributed under MIT license.
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//
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import Foundation
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private var lasttaskIdAssociated = 1_000_000_000
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// codebeat:disable[TOTAL_LOC,TOO_MANY_IVARS]
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/// This class is a replica of NSURLSessionStreamTask with same api for iOS 7/8
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/// while it can actually fallback to NSURLSessionStreamTask in iOS 9.
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public class FileProviderStreamTask: URLSessionTask, StreamDelegate {
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fileprivate var inputStream: InputStream?
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fileprivate var outputStream: OutputStream?
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fileprivate var operation_queue: OperationQueue!
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internal var _underlyingSession: URLSession
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fileprivate var streamDelegate: FPSStreamDelegate? {
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return (_underlyingSession.delegate as? FPSStreamDelegate)
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}
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fileprivate var _taskIdentifier: Int
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fileprivate var _taskDescription: String?
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/// Force using `URLSessionStreamTask` for iOS 9 and later
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public let useURLSession: Bool
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@available(iOS 9.0, macOS 10.11, *)
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fileprivate static var streamTasks = [Int: URLSessionStreamTask]()
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@available(iOS 9.0, macOS 10.11, *)
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internal var _underlyingTask: URLSessionStreamTask? {
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return FileProviderStreamTask.streamTasks[_taskIdentifier]
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}
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/**
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* An identifier uniquely identifies the task within a given session.
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*
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* This value is unique only within the context of a single session;
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* tasks in other sessions may have the same `taskIdentifier` value.
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*/
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open override var taskIdentifier: Int {
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if #available(iOS 9.0, macOS 10.11, *) {
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if self.useURLSession {
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return _underlyingTask!.taskIdentifier
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}
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}
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return _taskIdentifier
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}
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/// An app-provided description of the current task.
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///
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/// This value may be nil. It is intended to contain human-readable strings that you can
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/// then display to the user as part of your app’s user interface.
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open override var taskDescription: String? {
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get {
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if #available(iOS 9.0, macOS 10.11, *) {
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if self.useURLSession {
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return _underlyingTask!.taskDescription
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}
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}
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return _taskDescription
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}
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@objc(setTaskDescription:)
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set {
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if #available(iOS 9.0, macOS 10.11, *) {
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if self.useURLSession {
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_underlyingTask!.taskDescription = newValue
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return
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}
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}
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_taskDescription = newValue
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}
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}
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fileprivate var _state: URLSessionTask.State = .suspended
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/**
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* The current state of the task—active, suspended, in the process
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* of being canceled, or completed.
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*/
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override open var state: URLSessionTask.State {
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if #available(iOS 9.0, macOS 10.11, *) {
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if self.useURLSession {
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return _underlyingTask!.state
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}
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}
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return _state
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}
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/**
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* The original request object passed when the task was created.
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* This value is typically the same as the currently active request (`currentRequest`)
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* except when the server has responded to the initial request with a redirect to a different URL.
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*/
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override open var originalRequest: URLRequest? {
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if #available(iOS 9.0, macOS 10.11, *) {
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if self.useURLSession {
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return _underlyingTask!.originalRequest
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}
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}
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return nil
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}
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/**
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* The URL request object currently being handled by the task.
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* This value is typically the same as the initial request (`originalRequest`)
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* except when the server has responded to the initial request with a redirect to a different URL.
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*/
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override open var currentRequest: URLRequest? {
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if #available(iOS 9.0, macOS 10.11, *) {
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return _underlyingTask!.currentRequest
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} else {
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return nil
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}
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}
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fileprivate var _countOfBytesSent: Int64 = 0 {
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willSet {
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for observer in observers where observer.keyPath == "countOfBytesSent" {
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observer.observer.observeValue(forKeyPath: observer.keyPath, of: self, change: [.oldKey: _countOfBytesSent, .oldKey: newValue], context: observer.context)
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}
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}
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didSet {
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for observer in observers where observer.keyPath == "countOfBytesSent" {
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observer.observer.observeValue(forKeyPath: observer.keyPath, of: self, change: [.oldKey: oldValue, .oldKey: _countOfBytesSent], context: observer.context)
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}
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}
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}
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fileprivate var _countOfBytesRecieved: Int64 = 0 {
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willSet {
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for observer in observers where observer.keyPath == "countOfBytesRecieved" {
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observer.observer.observeValue(forKeyPath: observer.keyPath, of: self, change: [.oldKey: _countOfBytesRecieved, .oldKey: newValue], context: observer.context)
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}
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}
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didSet {
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for observer in observers where observer.keyPath == "countOfBytesRecieved" {
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observer.observer.observeValue(forKeyPath: observer.keyPath, of: self, change: [.oldKey: oldValue, .oldKey: _countOfBytesRecieved], context: observer.context)
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}
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}
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}
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/**
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* The number of bytes that the task has sent to the server in the request body.
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*
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* This byte count includes only the length of the request body itself, not the request headers.
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*
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* To be notified when this value changes, implement the
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* `urlSession(_:task:didSendBodyData:totalBytesSent:totalBytesExpectedToSend:)` delegate method.
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*/
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override open var countOfBytesSent: Int64 {
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if #available(iOS 9.0, macOS 10.11, *) {
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if self.useURLSession {
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return _underlyingTask!.countOfBytesSent
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}
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}
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return _countOfBytesSent
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}
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/**
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* The number of bytes that the task has received from the server in the response body.
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*
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* To be notified when this value changes, implement the `urlSession(_:dataTask:didReceive:)` delegate method (for data and upload tasks)
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* or the `urlSession(_:downloadTask:didWriteData:totalBytesWritten:totalBytesExpectedToWrite:)` method (for download tasks).
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*/
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override open var countOfBytesReceived: Int64 {
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if #available(iOS 9.0, macOS 10.11, *) {
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if self.useURLSession {
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return _underlyingTask!.countOfBytesReceived
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}
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}
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return _countOfBytesRecieved
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}
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/**
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* The number of bytes that the task expects to send in the request body.
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*
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* The `URL` loading system can determine the length of the upload data in three ways:
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* - From the length of the `NSData` object provided as the upload body.
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* - From the length of the file on disk provided as the upload body of an upload task (not a download task).
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* - From the `Content-Length` in the request object, if you explicitly set it.
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*
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* Otherwise, the value is `NSURLSessionTransferSizeUnknown` (`-1`) if you provided a stream or body data object, or zero (`0`) if you did not.
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*/
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override open var countOfBytesExpectedToSend: Int64 {
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if #available(iOS 9.0, macOS 10.11, *) {
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return _underlyingTask!.countOfBytesExpectedToSend
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} else {
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return Int64(dataToBeSent.count)
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}
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}
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/**
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* The number of bytes that the task expects to receive in the response body.
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*
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* This value is determined based on the `Content-Length` header received from the server.
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* If that header is absent, the value is `NSURLSessionTransferSizeUnknown`.
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*/
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override open var countOfBytesExpectedToReceive: Int64 {
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if #available(iOS 9.0, macOS 10.11, *) {
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if self.useURLSession {
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return _underlyingTask!.countOfBytesExpectedToReceive
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}
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}
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return Int64(dataReceived.count)
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}
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var observers: [(keyPath: String, observer: NSObject, context: UnsafeMutableRawPointer?)] = []
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public override func addObserver(_ observer: NSObject, forKeyPath keyPath: String, options: NSKeyValueObservingOptions = [], context: UnsafeMutableRawPointer?) {
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if #available(iOS 9.0, macOS 10.11, *) {
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if self.useURLSession {
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self._underlyingTask?.addObserver(observer, forKeyPath: keyPath, options: options, context: context)
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return
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}
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}
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switch keyPath {
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case #keyPath(countOfBytesSent):
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fallthrough
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case #keyPath(countOfBytesReceived):
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fallthrough
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case #keyPath(countOfBytesExpectedToSend):
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fallthrough
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case #keyPath(countOfBytesExpectedToReceive):
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observers.append((keyPath: keyPath, observer: observer, context: context))
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default:
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break
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}
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super.addObserver(observer, forKeyPath: keyPath, options: options, context: context)
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}
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public override func removeObserver(_ observer: NSObject, forKeyPath keyPath: String) {
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var newObservers: [(keyPath: String, observer: NSObject, context: UnsafeMutableRawPointer?)] = []
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for observer in observers where observer.keyPath != keyPath {
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newObservers.append(observer)
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}
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self.observers = newObservers
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super.removeObserver(observer, forKeyPath: keyPath)
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}
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public override func removeObserver(_ observer: NSObject, forKeyPath keyPath: String, context: UnsafeMutableRawPointer?) {
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var newObservers: [(keyPath: String, observer: NSObject, context: UnsafeMutableRawPointer?)] = []
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for observer in observers where observer.keyPath != keyPath || observer.context != context {
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newObservers.append(observer)
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}
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self.observers = newObservers
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super.removeObserver(observer, forKeyPath: keyPath, context: context)
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}
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override public init() {
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fatalError("Use NSURLSession.fpstreamTask() method")
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}
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fileprivate var host: (hostname: String, port: Int)?
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fileprivate var service: NetService?
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internal static let defaultUseURLSession = false
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internal init(session: URLSession, host: String, port: Int, useURLSession: Bool = defaultUseURLSession) {
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self._underlyingSession = session
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self.useURLSession = useURLSession
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if #available(iOS 9.0, macOS 10.11, *) {
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if useURLSession {
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let task = session.streamTask(withHostName: host, port: port)
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self._taskIdentifier = task.taskIdentifier
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FileProviderStreamTask.streamTasks[_taskIdentifier] = task
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return
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}
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}
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lasttaskIdAssociated += 1
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self._taskIdentifier = lasttaskIdAssociated
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self.host = (host, port)
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self.operation_queue = OperationQueue()
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self.operation_queue.name = "FileProviderStreamTask"
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self.operation_queue.maxConcurrentOperationCount = 1
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}
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internal init(session: URLSession, netService: NetService, useURLSession: Bool = defaultUseURLSession) {
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self._underlyingSession = session
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self.useURLSession = useURLSession
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if #available(iOS 9.0, macOS 10.11, *) {
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if useURLSession {
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let task = session.streamTask(with: netService)
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self._taskIdentifier = task.taskIdentifier
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FileProviderStreamTask.streamTasks[_taskIdentifier] = task
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return
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}
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}
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lasttaskIdAssociated += 1
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self._taskIdentifier = lasttaskIdAssociated
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self.service = netService
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self.operation_queue = OperationQueue()
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self.operation_queue.name = "FileProviderStreamTask"
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self.operation_queue.maxConcurrentOperationCount = 1
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}
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/**
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* Cancels the task.
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*
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* This method returns immediately, marking the task as being canceled. Once a task is marked as being canceled,
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* `urlSession(_:task:didCompleteWithError:)` will be sent to the task delegate, passing an error
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* in the domain NSURLErrorDomain with the code `NSURLErrorCancelled`. A task may, under some circumstances,
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* send messages to its delegate before the cancelation is acknowledged.
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*
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* This method may be called on a task that is suspended.
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*/
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override open func cancel() {
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if #available(iOS 9.0, macOS 10.11, *) {
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if self.useURLSession {
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_underlyingTask!.cancel()
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return
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}
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}
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self._state = .canceling
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//inputStream?.setValue(kCFBooleanTrue, forKey: kCFStreamPropertyShouldCloseNativeSocket as String)
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//outputStream?.setValue(kCFBooleanTrue, forKey: kCFStreamPropertyShouldCloseNativeSocket as String)
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self.inputStream?.close()
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self.outputStream?.close()
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self.inputStream?.remove(from: RunLoop.main, forMode: .defaultRunLoopMode)
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self.outputStream?.remove(from: RunLoop.main, forMode: .defaultRunLoopMode)
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self.inputStream?.delegate = nil
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self.outputStream?.delegate = nil
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self.inputStream = nil
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self.outputStream = nil
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self._state = .completed
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self._countOfBytesSent = 0
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self._countOfBytesRecieved = 0
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}
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var _error: Error? = nil
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/**
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* An error object that indicates why the task failed.
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*
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* This value is `NULL` if the task is still active or if the transfer completed successfully.
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*/
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override open var error: Error? {
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if #available(iOS 9.0, macOS 10.11, *) {
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if useURLSession {
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return _underlyingTask!.error
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}
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}
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return _error
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}
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/**
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* Temporarily suspends a task.
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*
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* A task, while suspended, produces no network traffic and is not subject to timeouts.
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* A download task can continue transferring data at a later time.
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* All other tasks must start over when resumed.
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*/
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override open func suspend() {
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if #available(iOS 9.0, macOS 10.11, *) {
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if self.useURLSession {
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_underlyingTask!.suspend()
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return
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}
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}
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self._state = .suspended
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self.operation_queue.isSuspended = true
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}
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// Resumes the task, if it is suspended.
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override open func resume() {
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if #available(iOS 9.0, macOS 10.11, *) {
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if self.useURLSession {
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_underlyingTask!.resume()
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return
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}
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}
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var readStream : Unmanaged<CFReadStream>?
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var writeStream : Unmanaged<CFWriteStream>?
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if inputStream == nil || outputStream == nil {
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if let host = host {
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CFStreamCreatePairWithSocketToHost(kCFAllocatorDefault, host.hostname as CFString, UInt32(host.port), &readStream, &writeStream)
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} else if let service = service {
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let cfnetService = CFNetServiceCreate(kCFAllocatorDefault, service.domain as CFString, service.type as CFString, service.name as CFString, Int32(service.port))
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CFStreamCreatePairWithSocketToNetService(kCFAllocatorDefault, cfnetService.takeRetainedValue(), &readStream, &writeStream)
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}
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inputStream = readStream?.takeRetainedValue()
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outputStream = writeStream?.takeRetainedValue()
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guard let inputStream = inputStream, let outputStream = outputStream else {
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return
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}
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streamDelegate?.urlSession?(self._underlyingSession, streamTask: self, didBecome: inputStream, outputStream: outputStream)
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}
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guard let inputStream = inputStream, let outputStream = outputStream else {
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return
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}
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inputStream.delegate = self
|
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outputStream.delegate = self
|
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|
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operation_queue.addOperation {
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inputStream.schedule(in: RunLoop.main, forMode: .defaultRunLoopMode)
|
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outputStream.schedule(in: RunLoop.main, forMode: .defaultRunLoopMode)
|
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}
|
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|
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inputStream.open()
|
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outputStream.open()
|
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|
||
operation_queue.isSuspended = false
|
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_state = .running
|
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}
|
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|
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fileprivate var dataToBeSent: Data = Data()
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fileprivate var dataReceived: Data = Data()
|
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|
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/**
|
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* Asynchronously reads a number of bytes from the stream, and calls a handler upon completion.
|
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*
|
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* - Parameter minBytes: The minimum number of bytes to read.
|
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* - ParametermaxBytes: The maximum number of bytes to read.
|
||
* - Parameter timeout: A timeout for reading bytes. If the read is not completed within the specified interval,
|
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* the read is canceled and the completionHandler is called with an error. Pass `0` to prevent a read from timing out.
|
||
* - Parameter completionHandler: The completion handler to call when all bytes are read, or an error occurs.
|
||
* This handler is executed on the delegate queue. This completion handler takes the following parameters:
|
||
* - Parameter data: The data read from the stream.
|
||
* - Parameter atEOF: Whether or not the stream reached end-of-file (`EOF`), such that no more data can be read.
|
||
* - Parameter error: An error object that indicates why the read failed, or `nil` if the read was successful.
|
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*/
|
||
open func readData(ofMinLength minBytes: Int, maxLength maxBytes: Int, timeout: TimeInterval, completionHandler: @escaping (_ data: Data?, _ atEOF: Bool, _ error :Error?) -> Void) {
|
||
if #available(iOS 9.0, macOS 10.11, *) {
|
||
if self.useURLSession {
|
||
_underlyingTask!.readData(ofMinLength: minBytes, maxLength: maxBytes, timeout: timeout, completionHandler: completionHandler)
|
||
return
|
||
}
|
||
}
|
||
|
||
guard let inputStream = inputStream else {
|
||
return
|
||
}
|
||
|
||
let expireDate = Date(timeIntervalSinceNow: timeout)
|
||
operation_queue.addOperation {
|
||
var timedOut: Bool = false
|
||
while (self.dataReceived.count == 0 || self.dataReceived.count < minBytes) && !timedOut {
|
||
Thread.sleep(forTimeInterval: 0.1)
|
||
timedOut = expireDate < Date()
|
||
}
|
||
var dR: Data?
|
||
if self.dataReceived.count > maxBytes {
|
||
let range: Range = 0..<maxBytes
|
||
dR = self.dataReceived.subdata(in: range)
|
||
self.dataReceived.removeFirst(maxBytes)
|
||
} else {
|
||
if self.dataReceived.count > 0 {
|
||
dR = self.dataReceived
|
||
self.dataReceived.removeAll(keepingCapacity: false)
|
||
}
|
||
}
|
||
let isEOF = inputStream.streamStatus == .atEnd && self.dataReceived.count == 0
|
||
completionHandler(dR, isEOF, dR == nil ? inputStream.streamError : nil)
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Asynchronously writes the specified data to the stream, and calls a handler upon completion.
|
||
*
|
||
* There is no guarantee that the remote side of the stream has received all of the written bytes
|
||
* at the time that `completionHandler` is called, only that all of the data has been written to the kernel.
|
||
*
|
||
* - Parameter data: The data to be written.
|
||
* - Parameter timeout: A timeout for writing bytes. If the write is not completed within the specified interval,
|
||
* the write is canceled and the `completionHandler` is called with an error.
|
||
* Pass `0` to prevent a write from timing out.
|
||
* - Parameter completionHandler: The completion handler to call when all bytes are written, or an error occurs.
|
||
* This handler is executed on the delegate queue.
|
||
* This completion handler takes the following parameter:
|
||
* - Parameter error: An error object that indicates why the write failed, or `nil` if the write was successful.
|
||
*/
|
||
open func write(_ data: Data, timeout: TimeInterval, completionHandler: @escaping (_ error: Error?) -> Void) {
|
||
if #available(iOS 9.0, macOS 10.11, *) {
|
||
if self.useURLSession {
|
||
_underlyingTask!.write(data, timeout: timeout, completionHandler: completionHandler)
|
||
return
|
||
}
|
||
}
|
||
|
||
guard outputStream != nil else {
|
||
return
|
||
}
|
||
|
||
operation_queue.addOperation {
|
||
self.dataToBeSent.append(data)
|
||
let result = self.write(timeout: timeout, close: false)
|
||
if result < 0 {
|
||
let error = self.outputStream?.streamError ?? URLError(.cannotWriteToFile)
|
||
completionHandler(error)
|
||
} else {
|
||
completionHandler(nil)
|
||
}
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Completes any already enqueued reads and writes, and then invokes the
|
||
* `urlSession(_:streamTask:didBecome:outputStream:)` delegate message.
|
||
*/
|
||
open func captureStreams() {
|
||
if #available(iOS 9.0, macOS 10.11, *) {
|
||
if self.useURLSession {
|
||
_underlyingTask!.captureStreams()
|
||
return
|
||
}
|
||
}
|
||
|
||
guard let outputStream = outputStream, let inputStream = inputStream else {
|
||
return
|
||
}
|
||
self.operation_queue.addOperation {
|
||
_=self.write(close: false)
|
||
while inputStream.streamStatus != .atEnd || outputStream.streamStatus == .writing {
|
||
Thread.sleep(forTimeInterval: 0.1)
|
||
}
|
||
self.streamDelegate?.urlSession?(self._underlyingSession, streamTask: self, didBecome: inputStream, outputStream: outputStream)
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Completes any enqueued reads and writes, and then closes the write side of the underlying socket.
|
||
*
|
||
* You may continue to read data using the `readData(ofMinLength:maxLength:timeout:completionHandler:)`
|
||
* method after calling this method. Any calls to `write(_:timeout:completionHandler:)` after calling
|
||
* this method will result in an error.
|
||
*
|
||
* Because the server may continue to write bytes to the client, it is recommended that
|
||
* you continue reading until the stream reaches end-of-file (EOF).
|
||
*/
|
||
open func closeWrite() {
|
||
if #available(iOS 9.0, macOS 10.11, *) {
|
||
if self.useURLSession {
|
||
_underlyingTask!.closeWrite()
|
||
return
|
||
}
|
||
}
|
||
|
||
operation_queue.addOperation {
|
||
_ = self.write(close: true)
|
||
}
|
||
}
|
||
|
||
fileprivate func write(timeout: TimeInterval = 0, close: Bool) -> Int {
|
||
guard let outputStream = outputStream else {
|
||
return -1
|
||
}
|
||
|
||
var byteSent: Int = 0
|
||
let expireDate = Date(timeIntervalSinceNow: timeout)
|
||
while self.dataToBeSent.count > 0 && (timeout == 0 || expireDate > Date()) {
|
||
let bytesWritten = self.dataToBeSent.withUnsafeBytes {
|
||
outputStream.write($0, maxLength: self.dataToBeSent.count)
|
||
}
|
||
|
||
if bytesWritten > 0 {
|
||
let range = 0..<bytesWritten
|
||
self.dataToBeSent.replaceSubrange(range, with: Data())
|
||
byteSent += bytesWritten
|
||
} else if bytesWritten < 0 {
|
||
self._error = outputStream.streamError
|
||
return bytesWritten
|
||
}
|
||
if self.dataToBeSent.count == 0 {
|
||
break
|
||
}
|
||
}
|
||
self._countOfBytesSent += Int64(byteSent)
|
||
if close {
|
||
outputStream.close()
|
||
self.streamDelegate?.urlSession?(self._underlyingSession, writeClosedFor: self)
|
||
}
|
||
return byteSent
|
||
}
|
||
|
||
/**
|
||
* Completes any enqueued reads and writes, and then closes the read side of the underlying socket.
|
||
*
|
||
* You may continue to write data using the `write(_:timeout:completionHandler:)` method after
|
||
* calling this method. Any calls to `readData(ofMinLength:maxLength:timeout:completionHandler:)`
|
||
* after calling this method will result in an error.
|
||
*/
|
||
open func closeRead() {
|
||
if #available(iOS 9.0, macOS 10.11, *) {
|
||
if self.useURLSession {
|
||
_underlyingTask!.closeRead()
|
||
return
|
||
}
|
||
}
|
||
|
||
guard let inputStream = inputStream else {
|
||
return
|
||
}
|
||
operation_queue.addOperation {
|
||
while inputStream.streamStatus != .atEnd {
|
||
Thread.sleep(forTimeInterval: 0.1)
|
||
}
|
||
inputStream.close()
|
||
self.streamDelegate?.urlSession?(self._underlyingSession, readClosedFor: self)
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Completes any enqueued reads and writes, and establishes a secure connection.
|
||
*
|
||
* Authentication callbacks are sent to the session's delegate using the
|
||
* `urlSession(_:task:didReceive:completionHandler:)` method.
|
||
*/
|
||
open func startSecureConnection() {
|
||
if #available(iOS 9.0, macOS 10.11, *) {
|
||
if self.useURLSession {
|
||
_underlyingTask!.startSecureConnection()
|
||
return
|
||
}
|
||
}
|
||
|
||
operation_queue.addOperation {
|
||
self.inputStream!.setProperty(StreamSocketSecurityLevel.negotiatedSSL.rawValue, forKey: .socketSecurityLevelKey)
|
||
self.outputStream!.setProperty(StreamSocketSecurityLevel.negotiatedSSL.rawValue, forKey: .socketSecurityLevelKey)
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Completes any enqueued reads and writes, and closes the secure connection.
|
||
*/
|
||
open func stopSecureConnection() {
|
||
if #available(iOS 9.0, macOS 10.11, *) {
|
||
if self.useURLSession {
|
||
_underlyingTask!.stopSecureConnection()
|
||
return
|
||
}
|
||
}
|
||
operation_queue.addOperation {
|
||
self.inputStream!.setProperty(StreamSocketSecurityLevel.none.rawValue, forKey: .socketSecurityLevelKey)
|
||
self.outputStream!.setProperty(StreamSocketSecurityLevel.none.rawValue, forKey: .socketSecurityLevelKey)
|
||
}
|
||
}
|
||
|
||
open func stream(_ aStream: Stream, handle eventCode: Stream.Event) {
|
||
if eventCode.contains(.errorOccurred) {
|
||
self._error = aStream.streamError
|
||
streamDelegate?.urlSession?(_underlyingSession, task: self, didCompleteWithError: error)
|
||
}
|
||
|
||
if aStream == inputStream && eventCode.contains(.hasBytesAvailable) {
|
||
while (inputStream!.hasBytesAvailable) {
|
||
var buffer = [UInt8](repeating: 0, count: 2048)
|
||
let len = inputStream!.read(&buffer, maxLength: buffer.count)
|
||
if len > 0 {
|
||
dataReceived.append(&buffer, count: len)
|
||
self._countOfBytesRecieved += Int64(len)
|
||
}
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
public extension URLSession {
|
||
/// Creates a bidirectional stream task to a given host and port.
|
||
func fpstreamTask(withHostName hostname: String, port: Int) -> FileProviderStreamTask {
|
||
return FileProviderStreamTask(session: self, host: hostname, port: port)
|
||
}
|
||
|
||
/**
|
||
* Creates a bidirectional stream task with an NSNetService to identify the endpoint.
|
||
* The NSNetService will be resolved before any IO completes.
|
||
*/
|
||
func fpstreamTask(withNetService service: NetService) -> FileProviderStreamTask {
|
||
return FileProviderStreamTask(session: self, netService: service)
|
||
}
|
||
}
|
||
|
||
@objc
|
||
internal protocol FPSStreamDelegate : URLSessionTaskDelegate {
|
||
|
||
|
||
/**
|
||
* Indiciates that the read side of a connection has been closed. Any
|
||
* outstanding reads complete, but future reads will immediately fail.
|
||
* This may be sent even when no reads are in progress. However, when
|
||
* this delegate message is received, there may still be bytes
|
||
* available. You only know that no more bytes are available when you
|
||
* are able to read until EOF. */
|
||
@objc optional func urlSession(_ session: URLSession, readClosedFor streamTask: FileProviderStreamTask)
|
||
|
||
|
||
/**
|
||
* Indiciates that the write side of a connection has been closed.
|
||
* Any outstanding writes complete, but future writes will immediately
|
||
* fail.
|
||
*/
|
||
@objc optional func urlSession(_ session: URLSession, writeClosedFor streamTask: FileProviderStreamTask)
|
||
|
||
|
||
/**
|
||
* A notification that the system has determined that a better route
|
||
* to the host has been detected (eg, a wi-fi interface becoming
|
||
* available.) This is a hint to the delegate that it may be
|
||
* desirable to create a new task for subsequent work. Note that
|
||
* there is no guarantee that the future task will be able to connect
|
||
* to the host, so callers should should be prepared for failure of
|
||
* reads and writes over any new interface. */
|
||
@objc optional func urlSession(_ session: URLSession, betterRouteDiscoveredFor streamTask: FileProviderStreamTask)
|
||
|
||
|
||
/**
|
||
* The given task has been completed, and unopened NSInputStream and
|
||
* NSOutputStream objects are created from the underlying network
|
||
* connection. This will only be invoked after all enqueued IO has
|
||
* completed (including any necessary handshakes.) The streamTask
|
||
* will not receive any further delegate messages.
|
||
*/
|
||
@objc optional func urlSession(_ session: URLSession, streamTask: FileProviderStreamTask, didBecome inputStream: InputStream, outputStream: OutputStream)
|
||
}
|
||
// codebeat:enable[TOTAL_LOC,TOO_MANY_IVARS]
|
||
|
||
private let ports: [String: Int] = ["http": 80, "https": 443, "smb": 445,"ftp": 21,
|
||
"telnet": 23, "pop": 110, "smtp": 25, "imap": 143]
|
||
private let securePorts: [String: Int] = ["ssh": 22, "https": 443, "smb": 445, "smtp": 465,
|
||
"ftps": 990,"telnet": 992, "imap": 993, "pop": 995]
|