我想快速从套接字中获取输入流中的文件
从套接字中获取字符串的例子有很多，但没有找到任何获取套接字文件的方法
// To connect to the server
func connect(host: String, port: Int) {
SwifterHandler.sharedInstance.FilePathSave = SwifterHandler.sharedInstance.rootDoc()
self.host = host
self.port = port
Stream.getStreamsToHost(withName: host, port: port, inputStream: &self.inputStream, outputStream: &self.outputStream)
if self.inputStream != nil && self.outputStream != nil {
self.inputStream!.delegate = self
self.outputStream!.delegate = self
self.inputStream!.schedule(in: RunLoop.current, forMode: RunLoopMode.defaultRunLoopMode)
self.outputStream!.schedule(in: RunLoop.current, forMode: RunLoopMode.defaultRunLoopMode)
self.inputStream!.open()
self.outputStream!.open()
}
}
// This is a call back func that takes care of I/O from/to the server.
// Read about this func. There are many event codes to handle.
// I just wanted to make it simple.
func stream(aStream: Stream, handleEvent eventCode: Stream.Event) {
print("Event : \(eventCode)")
if aStream != inputStream {
return
}
if eventCode == .hasBytesAvailable {
self.ReadFile()
}
}
private func ReadFile()
{
var buffer = [UInt8](repeating: 0, count: 1024)
if let fh = FileHandle(forWritingAtPath: "\(SwifterHandler.sharedInstance.FilePathSave)/test.png") {
fh.seekToEndOfFile()
while (self.inputStream!.hasBytesAvailable){
let bytesRead: Int = inputStream!.read(&buffer, maxLength: buffer.count)
if bytesRead >= 0 {
fh.write(Data(bytes: buffer))
}
}
fh.closeFile()
}
SwifterHandler.sharedInstance.SharedFile(path: SwifterHandler.sharedInstance.FilePathSave)
self.dataReadCallback!("Success Download")
InstallApp().InstallApplication()
self.dataReadCallback!("Application Installed")
}
服务器发送文件时不运行ReadFile()
最佳答案
class ViewController: UIViewController,StreamDelegate
{
var inputstream: InputStream?
var outputstream: OutputStream?
var host: String?
var port: Int?
override func viewDidLoad()
{
super.viewDidLoad()
let _ = initNetworkCommunication()
let word = "Hello are you there->"
let buf = [UInt8](word.utf8)
print("This is buf = \(buf))")
outputstream?.write(buf, maxLength: buf.count)
}
func initNetworkCommunication()
{
host = "127.0.0.1" //this is IP number passing as string
port = 34 //this is port number
Stream.getStreamsToHost(withName: host!, port: port!,inputStream: &inputstream, outputStream: &outputstream)
//here we are going to calling a delegate function
inputstream?.delegate = self as? StreamDelegate
outputstream?.delegate = self as? StreamDelegate
inputstream?.schedule(in: RunLoop.current, forMode: RunLoopMode.defaultRunLoopMode)
outputstream?.schedule(in: RunLoop.current, forMode: RunLoopMode.defaultRunLoopMode)
inputstream?.open()
print("Here the input stream will open")
outputstream?.open()
print("connected")
}
func stream(_ aStream: Stream, handle eventCode: Stream.Event)
{
print("we are in delegate method")
print("EventCode = \(eventCode)")
switch (eventCode)
{
case Stream.Event.openCompleted:
if(aStream == outputstream)
{
print("output:OutPutStream opened")
}
print("Input = openCompleted")
break
case Stream.Event.errorOccurred:
if(aStream === outputstream)
{
print("output:Error Occurred\n")
}
print("Input : Error Occurred\n")
break
case Stream.Event.endEncountered:
if(aStream === outputstream)
{
print("output:endEncountered\n")
}
print("Input = endEncountered\n")
break
case Stream.Event.hasSpaceAvailable:
if(aStream === outputstream)
{
print("output:hasSpaceAvailable\n")
}
print("Input = hasSpaceAvailable\n")
break
case Stream.Event.hasBytesAvailable:
if(aStream === outputstream)
{
print("output:hasBytesAvailable\n")
}
if aStream === inputstream
{
print("Input:hasBytesAvailable\n")
var buffer = [UInt8](repeating: 0, count: 4096)
//print("input buffer = \(buffer)")
// sleep(40)
while (self.inputstream!.hasBytesAvailable)
{
let len = inputstream!.read(&buffer, maxLength: buffer.count)
// If read bytes are less than 0 -> error
if len < 0
{
let error = self.inputstream!.streamError
print("Input stream has less than 0 bytes\(error!)")
//closeNetworkCommunication()
}
// If read bytes equal 0 -> close connection
else if len == 0
{
print("Input stream has 0 bytes")
// closeNetworkCommunication()
}
if(len > 0)
//here it will check it out for the data sending from the server if it is greater than 0 means if there is a data means it will write
{
let messageFromServer = NSString(bytes: &buffer, length: buffer.count, encoding: String.Encoding.utf8.rawValue)
if messageFromServer == nil
{
print("Network hasbeen closed")
// v1.closeNetworkCommunication()
}
else
{
print("MessageFromServer = \(String(describing: messageFromServer))")
}
}
}
}
break
default:
print("default block")
}
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}
关于ios - 从 Swift IOS 套接字获取 InputStream 中的文件，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/41239081/