Amir Abbas
754 lines
30 KiB
Swift
754 lines
30 KiB
Swift
//
|
||
// FPSStreamTask.swift
|
||
// FileProvider
|
||
//
|
||
// Created by Amir Abbas Mousavian.
|
||
// Copyright © 2016 Mousavian. Distributed under MIT license.
|
||
//
|
||
|
||
import Foundation
|
||
|
||
private var lasttaskIdAssociated = 1_000_000_000
|
||
|
||
// codebeat:disable[TOTAL_LOC,TOO_MANY_IVARS]
|
||
/// This class is a replica of NSURLSessionStreamTask with same api for iOS 7/8
|
||
/// while it can actually fallback to NSURLSessionStreamTask in iOS 9.
|
||
public class FileProviderStreamTask: URLSessionTask, StreamDelegate {
|
||
fileprivate var inputStream: InputStream?
|
||
fileprivate var outputStream: OutputStream?
|
||
|
||
fileprivate var operation_queue: OperationQueue!
|
||
internal var _underlyingSession: URLSession
|
||
fileprivate var streamDelegate: FPSStreamDelegate? {
|
||
return (_underlyingSession.delegate as? FPSStreamDelegate)
|
||
}
|
||
fileprivate var _taskIdentifier: Int
|
||
fileprivate var _taskDescription: String?
|
||
|
||
/// Force using `URLSessionStreamTask` for iOS 9 and later
|
||
public let useURLSession: Bool
|
||
@available(iOS 9.0, macOS 10.11, *)
|
||
fileprivate static var streamTasks = [Int: URLSessionStreamTask]()
|
||
|
||
@available(iOS 9.0, macOS 10.11, *)
|
||
internal var _underlyingTask: URLSessionStreamTask? {
|
||
return FileProviderStreamTask.streamTasks[_taskIdentifier]
|
||
}
|
||
|
||
/**
|
||
* An identifier uniquely identifies the task within a given session.
|
||
*
|
||
* This value is unique only within the context of a single session;
|
||
* tasks in other sessions may have the same `taskIdentifier` value.
|
||
*/
|
||
open override var taskIdentifier: Int {
|
||
if #available(iOS 9.0, macOS 10.11, *) {
|
||
if self.useURLSession {
|
||
return _underlyingTask!.taskIdentifier
|
||
}
|
||
}
|
||
|
||
return _taskIdentifier
|
||
}
|
||
|
||
/// An app-provided description of the current task.
|
||
///
|
||
/// This value may be nil. It is intended to contain human-readable strings that you can
|
||
/// then display to the user as part of your app’s user interface.
|
||
open override var taskDescription: String? {
|
||
get {
|
||
if #available(iOS 9.0, macOS 10.11, *) {
|
||
if self.useURLSession {
|
||
return _underlyingTask!.taskDescription
|
||
}
|
||
}
|
||
|
||
return _taskDescription
|
||
}
|
||
@objc(setTaskDescription:)
|
||
set {
|
||
if #available(iOS 9.0, macOS 10.11, *) {
|
||
if self.useURLSession {
|
||
_underlyingTask!.taskDescription = newValue
|
||
return
|
||
}
|
||
}
|
||
|
||
_taskDescription = newValue
|
||
}
|
||
}
|
||
|
||
fileprivate var _state: URLSessionTask.State = .suspended
|
||
/**
|
||
* The current state of the task—active, suspended, in the process
|
||
* of being canceled, or completed.
|
||
*/
|
||
override open var state: URLSessionTask.State {
|
||
if #available(iOS 9.0, macOS 10.11, *) {
|
||
if self.useURLSession {
|
||
return _underlyingTask!.state
|
||
}
|
||
}
|
||
|
||
return _state
|
||
}
|
||
|
||
/**
|
||
* The original request object passed when the task was created.
|
||
* This value is typically the same as the currently active request (`currentRequest`)
|
||
* except when the server has responded to the initial request with a redirect to a different URL.
|
||
*/
|
||
override open var originalRequest: URLRequest? {
|
||
if #available(iOS 9.0, macOS 10.11, *) {
|
||
if self.useURLSession {
|
||
return _underlyingTask!.originalRequest
|
||
}
|
||
}
|
||
|
||
return nil
|
||
}
|
||
|
||
/**
|
||
* The URL request object currently being handled by the task.
|
||
* This value is typically the same as the initial request (`originalRequest`)
|
||
* except when the server has responded to the initial request with a redirect to a different URL.
|
||
*/
|
||
override open var currentRequest: URLRequest? {
|
||
if #available(iOS 9.0, macOS 10.11, *) {
|
||
return _underlyingTask!.currentRequest
|
||
} else {
|
||
return nil
|
||
}
|
||
}
|
||
|
||
fileprivate var _countOfBytesSent: Int64 = 0 {
|
||
willSet {
|
||
for observer in observers where observer.keyPath == "countOfBytesSent" {
|
||
observer.observer.observeValue(forKeyPath: observer.keyPath, of: self, change: [.oldKey: _countOfBytesSent, .oldKey: newValue], context: observer.context)
|
||
}
|
||
}
|
||
didSet {
|
||
for observer in observers where observer.keyPath == "countOfBytesSent" {
|
||
observer.observer.observeValue(forKeyPath: observer.keyPath, of: self, change: [.oldKey: oldValue, .oldKey: _countOfBytesSent], context: observer.context)
|
||
}
|
||
}
|
||
}
|
||
|
||
fileprivate var _countOfBytesRecieved: Int64 = 0 {
|
||
willSet {
|
||
for observer in observers where observer.keyPath == "countOfBytesRecieved" {
|
||
observer.observer.observeValue(forKeyPath: observer.keyPath, of: self, change: [.oldKey: _countOfBytesRecieved, .oldKey: newValue], context: observer.context)
|
||
}
|
||
}
|
||
didSet {
|
||
for observer in observers where observer.keyPath == "countOfBytesRecieved" {
|
||
observer.observer.observeValue(forKeyPath: observer.keyPath, of: self, change: [.oldKey: oldValue, .oldKey: _countOfBytesRecieved], context: observer.context)
|
||
}
|
||
}
|
||
}
|
||
|
||
/**
|
||
* The number of bytes that the task has sent to the server in the request body.
|
||
*
|
||
* This byte count includes only the length of the request body itself, not the request headers.
|
||
*
|
||
* To be notified when this value changes, implement the
|
||
* `urlSession(_:task:didSendBodyData:totalBytesSent:totalBytesExpectedToSend:)` delegate method.
|
||
*/
|
||
override open var countOfBytesSent: Int64 {
|
||
if #available(iOS 9.0, macOS 10.11, *) {
|
||
if self.useURLSession {
|
||
return _underlyingTask!.countOfBytesSent
|
||
}
|
||
}
|
||
|
||
return _countOfBytesSent
|
||
}
|
||
|
||
/**
|
||
* The number of bytes that the task has received from the server in the response body.
|
||
*
|
||
* To be notified when this value changes, implement the `urlSession(_:dataTask:didReceive:)` delegate method (for data and upload tasks)
|
||
* or the `urlSession(_:downloadTask:didWriteData:totalBytesWritten:totalBytesExpectedToWrite:)` method (for download tasks).
|
||
*/
|
||
override open var countOfBytesReceived: Int64 {
|
||
if #available(iOS 9.0, macOS 10.11, *) {
|
||
if self.useURLSession {
|
||
return _underlyingTask!.countOfBytesReceived
|
||
}
|
||
}
|
||
|
||
return _countOfBytesRecieved
|
||
}
|
||
|
||
/**
|
||
* The number of bytes that the task expects to send in the request body.
|
||
*
|
||
* The `URL` loading system can determine the length of the upload data in three ways:
|
||
* - From the length of the `NSData` object provided as the upload body.
|
||
* - From the length of the file on disk provided as the upload body of an upload task (not a download task).
|
||
* - From the `Content-Length` in the request object, if you explicitly set it.
|
||
*
|
||
* Otherwise, the value is `NSURLSessionTransferSizeUnknown` (`-1`) if you provided a stream or body data object, or zero (`0`) if you did not.
|
||
*/
|
||
override open var countOfBytesExpectedToSend: Int64 {
|
||
if #available(iOS 9.0, macOS 10.11, *) {
|
||
return _underlyingTask!.countOfBytesExpectedToSend
|
||
} else {
|
||
return Int64(dataToBeSent.count)
|
||
}
|
||
}
|
||
|
||
/**
|
||
* The number of bytes that the task expects to receive in the response body.
|
||
*
|
||
* This value is determined based on the `Content-Length` header received from the server.
|
||
* If that header is absent, the value is `NSURLSessionTransferSizeUnknown`.
|
||
*/
|
||
override open var countOfBytesExpectedToReceive: Int64 {
|
||
if #available(iOS 9.0, macOS 10.11, *) {
|
||
if self.useURLSession {
|
||
return _underlyingTask!.countOfBytesExpectedToReceive
|
||
}
|
||
}
|
||
|
||
return Int64(dataReceived.count)
|
||
}
|
||
|
||
var observers: [(keyPath: String, observer: NSObject, context: UnsafeMutableRawPointer?)] = []
|
||
|
||
public override func addObserver(_ observer: NSObject, forKeyPath keyPath: String, options: NSKeyValueObservingOptions = [], context: UnsafeMutableRawPointer?) {
|
||
if #available(iOS 9.0, macOS 10.11, *) {
|
||
if self.useURLSession {
|
||
self._underlyingTask?.addObserver(observer, forKeyPath: keyPath, options: options, context: context)
|
||
return
|
||
}
|
||
}
|
||
|
||
switch keyPath {
|
||
case #keyPath(countOfBytesSent):
|
||
fallthrough
|
||
case #keyPath(countOfBytesReceived):
|
||
fallthrough
|
||
case #keyPath(countOfBytesExpectedToSend):
|
||
fallthrough
|
||
case #keyPath(countOfBytesExpectedToReceive):
|
||
observers.append((keyPath: keyPath, observer: observer, context: context))
|
||
default:
|
||
break
|
||
}
|
||
super.addObserver(observer, forKeyPath: keyPath, options: options, context: context)
|
||
}
|
||
|
||
public override func removeObserver(_ observer: NSObject, forKeyPath keyPath: String) {
|
||
var newObservers: [(keyPath: String, observer: NSObject, context: UnsafeMutableRawPointer?)] = []
|
||
for observer in observers where observer.keyPath != keyPath {
|
||
newObservers.append(observer)
|
||
}
|
||
self.observers = newObservers
|
||
super.removeObserver(observer, forKeyPath: keyPath)
|
||
}
|
||
|
||
public override func removeObserver(_ observer: NSObject, forKeyPath keyPath: String, context: UnsafeMutableRawPointer?) {
|
||
var newObservers: [(keyPath: String, observer: NSObject, context: UnsafeMutableRawPointer?)] = []
|
||
for observer in observers where observer.keyPath != keyPath || observer.context != context {
|
||
newObservers.append(observer)
|
||
}
|
||
self.observers = newObservers
|
||
super.removeObserver(observer, forKeyPath: keyPath, context: context)
|
||
}
|
||
|
||
override public init() {
|
||
fatalError("Use NSURLSession.fpstreamTask() method")
|
||
}
|
||
|
||
fileprivate var host: (hostname: String, port: Int)?
|
||
fileprivate var service: NetService?
|
||
|
||
internal static let defaultUseURLSession = false
|
||
|
||
internal init(session: URLSession, host: String, port: Int, useURLSession: Bool = defaultUseURLSession) {
|
||
self._underlyingSession = session
|
||
self.useURLSession = useURLSession
|
||
if #available(iOS 9.0, macOS 10.11, *) {
|
||
if useURLSession {
|
||
let task = session.streamTask(withHostName: host, port: port)
|
||
self._taskIdentifier = task.taskIdentifier
|
||
FileProviderStreamTask.streamTasks[_taskIdentifier] = task
|
||
return
|
||
}
|
||
}
|
||
|
||
lasttaskIdAssociated += 1
|
||
self._taskIdentifier = lasttaskIdAssociated
|
||
self.host = (host, port)
|
||
self.operation_queue = OperationQueue()
|
||
self.operation_queue.name = "FileProviderStreamTask"
|
||
self.operation_queue.maxConcurrentOperationCount = 1
|
||
}
|
||
|
||
internal init(session: URLSession, netService: NetService, useURLSession: Bool = defaultUseURLSession) {
|
||
self._underlyingSession = session
|
||
self.useURLSession = useURLSession
|
||
if #available(iOS 9.0, macOS 10.11, *) {
|
||
if useURLSession {
|
||
let task = session.streamTask(with: netService)
|
||
self._taskIdentifier = task.taskIdentifier
|
||
FileProviderStreamTask.streamTasks[_taskIdentifier] = task
|
||
return
|
||
}
|
||
}
|
||
|
||
lasttaskIdAssociated += 1
|
||
self._taskIdentifier = lasttaskIdAssociated
|
||
self.service = netService
|
||
self.operation_queue = OperationQueue()
|
||
self.operation_queue.name = "FileProviderStreamTask"
|
||
self.operation_queue.maxConcurrentOperationCount = 1
|
||
}
|
||
|
||
deinit {
|
||
if !self.useURLSession {
|
||
self.cancel()
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Cancels the task.
|
||
*
|
||
* This method returns immediately, marking the task as being canceled. Once a task is marked as being canceled,
|
||
* `urlSession(_:task:didCompleteWithError:)` will be sent to the task delegate, passing an error
|
||
* in the domain NSURLErrorDomain with the code `NSURLErrorCancelled`. A task may, under some circumstances,
|
||
* send messages to its delegate before the cancelation is acknowledged.
|
||
*
|
||
* This method may be called on a task that is suspended.
|
||
*/
|
||
override open func cancel() {
|
||
if #available(iOS 9.0, macOS 10.11, *) {
|
||
if self.useURLSession {
|
||
_underlyingTask!.cancel()
|
||
return
|
||
}
|
||
}
|
||
|
||
self._state = .canceling
|
||
|
||
self.inputStream?.close()
|
||
self.outputStream?.close()
|
||
|
||
self.inputStream?.remove(from: RunLoop.main, forMode: .defaultRunLoopMode)
|
||
self.outputStream?.remove(from: RunLoop.main, forMode: .defaultRunLoopMode)
|
||
|
||
self.inputStream?.delegate = nil
|
||
self.outputStream?.delegate = nil
|
||
|
||
self.inputStream = nil
|
||
self.outputStream = nil
|
||
|
||
self._state = .completed
|
||
self._countOfBytesSent = 0
|
||
self._countOfBytesRecieved = 0
|
||
}
|
||
|
||
var _error: Error? = nil
|
||
|
||
/**
|
||
* An error object that indicates why the task failed.
|
||
*
|
||
* This value is `NULL` if the task is still active or if the transfer completed successfully.
|
||
*/
|
||
override open var error: Error? {
|
||
if #available(iOS 9.0, macOS 10.11, *) {
|
||
if useURLSession {
|
||
return _underlyingTask!.error
|
||
}
|
||
}
|
||
|
||
return _error
|
||
}
|
||
|
||
/**
|
||
* Temporarily suspends a task.
|
||
*
|
||
* A task, while suspended, produces no network traffic and is not subject to timeouts.
|
||
* A download task can continue transferring data at a later time.
|
||
* All other tasks must start over when resumed.
|
||
*/
|
||
override open func suspend() {
|
||
if #available(iOS 9.0, macOS 10.11, *) {
|
||
if self.useURLSession {
|
||
_underlyingTask!.suspend()
|
||
return
|
||
}
|
||
}
|
||
|
||
self._state = .suspended
|
||
self.operation_queue.isSuspended = true
|
||
}
|
||
|
||
// Resumes the task, if it is suspended.
|
||
override open func resume() {
|
||
if #available(iOS 9.0, macOS 10.11, *) {
|
||
if self.useURLSession {
|
||
_underlyingTask!.resume()
|
||
return
|
||
}
|
||
}
|
||
|
||
var readStream : Unmanaged<CFReadStream>?
|
||
var writeStream : Unmanaged<CFWriteStream>?
|
||
|
||
if inputStream == nil || outputStream == nil {
|
||
if let host = host {
|
||
CFStreamCreatePairWithSocketToHost(kCFAllocatorDefault, host.hostname as CFString, UInt32(host.port), &readStream, &writeStream)
|
||
} else if let service = service {
|
||
let cfnetService = CFNetServiceCreate(kCFAllocatorDefault, service.domain as CFString, service.type as CFString, service.name as CFString, Int32(service.port))
|
||
CFStreamCreatePairWithSocketToNetService(kCFAllocatorDefault, cfnetService.takeRetainedValue(), &readStream, &writeStream)
|
||
}
|
||
|
||
inputStream = readStream?.takeRetainedValue()
|
||
outputStream = writeStream?.takeRetainedValue()
|
||
guard let inputStream = inputStream, let outputStream = outputStream else {
|
||
return
|
||
}
|
||
streamDelegate?.urlSession?(self._underlyingSession, streamTask: self, didBecome: inputStream, outputStream: outputStream)
|
||
}
|
||
|
||
guard let inputStream = inputStream, let outputStream = outputStream else {
|
||
return
|
||
}
|
||
|
||
if isSecure {
|
||
inputStream.setProperty(securityLevel.rawValue, forKey: .socketSecurityLevelKey)
|
||
outputStream.setProperty(securityLevel.rawValue, forKey: .socketSecurityLevelKey)
|
||
} else {
|
||
inputStream.setProperty(StreamSocketSecurityLevel.none.rawValue, forKey: .socketSecurityLevelKey)
|
||
outputStream.setProperty(StreamSocketSecurityLevel.none.rawValue, forKey: .socketSecurityLevelKey)
|
||
}
|
||
|
||
inputStream.delegate = self
|
||
outputStream.delegate = self
|
||
|
||
inputStream.schedule(in: RunLoop.main, forMode: .defaultRunLoopMode)
|
||
outputStream.schedule(in: RunLoop.main, forMode: .defaultRunLoopMode)
|
||
|
||
inputStream.open()
|
||
outputStream.open()
|
||
|
||
operation_queue.isSuspended = false
|
||
_state = .running
|
||
}
|
||
|
||
fileprivate var dataToBeSent: Data = Data()
|
||
fileprivate var dataReceived: Data = Data()
|
||
|
||
/**
|
||
* Asynchronously reads a number of bytes from the stream, and calls a handler upon completion.
|
||
*
|
||
* - Parameter minBytes: The minimum number of bytes to read.
|
||
* - 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,
|
||
* 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.
|
||
*/
|
||
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)
|
||
}
|
||
}
|
||
|
||
fileprivate var isSecure = false
|
||
|
||
public var securityLevel: StreamSocketSecurityLevel = .tlSv1
|
||
/**
|
||
* 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
|
||
}
|
||
}
|
||
|
||
isSecure = true
|
||
}
|
||
|
||
/**
|
||
* 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
|
||
}
|
||
}
|
||
|
||
isSecure = false
|
||
}
|
||
|
||
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]
|