如何在Swift中檢測套接字數據包的末尾

Question

我正在Swift中構建一個HTTP服務器。服務器最終將在Linux上運行，但現在只能在Mac OS上編譯。

總之，我有套接字連接工作完美，我能夠接收數據流，但我很難找到確定如何檢測套接字數據流結束的最佳方式。

我知道有很多方法可以解決這個問題，而且我知道套接字基本上只是吐出純粹的二進制數據，並沒有包含開始和結束的「數據包」的概念。我的問題什麼是用於檢測從請求網頁的網絡瀏覽器發送的數據包結束的最佳技術？我知道JSON很簡單，但我很好奇客戶何時專門請求網頁。

謝謝

Answer 1

InputStream爲您做到了這一點，您不必關心這一點。

嘗試使用此：

import Foundation 

typealias OnComing = (String) -> (Void) 

class SocketClient: NSObject, StreamDelegate { 

    var host:String? 
    var port:Int? 
    var inputStream: InputStream? 
    var outputStream: OutputStream? 

    var status = false; 
    var output = "" 
    var bufferSize = 1024; 

    var onComing:OnComing! 

    func makeCFStreamConnection(host: String, port: Int, onComing:@escaping OnComing) { 

     self.host = host 
     self.port = port 
     self.onComing = onComing 

     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: .main, forMode: RunLoopMode.defaultRunLoopMode) 
      self.outputStream!.schedule(in: .main, forMode: RunLoopMode.defaultRunLoopMode) 

      self.inputStream!.open() 
      self.outputStream!.open() 

     } 


    } 

    func stream(_ aStream: Stream, handle eventCode: Stream.Event) { 
     if aStream === self.inputStream { 
      switch eventCode { 
      case Stream.Event.errorOccurred: 
       break 
      case Stream.Event.openCompleted: 
       break 
      case Stream.Event.hasBytesAvailable: 
       break 
       read() 
      default: 
       break 
      } 
     } else if aStream === self.outputStream { 
      switch eventCode { 
      case Stream.Event.errorOccurred: 
       break 
      case Stream.Event.openCompleted: 
       break 
      case Stream.Event.hasSpaceAvailable: 
       break 
      default: 
       break 
      } 
     } 
    } 

    func read() { 
     var buffer = [UInt8](repeating: 0, count: bufferSize) 
     while (self.inputStream!.hasBytesAvailable) { 
      let bytesRead: Int = inputStream!.read(&buffer, maxLength: buffer.count) 
      if bytesRead >= 0 { 
       output += NSString(bytes: UnsafePointer(buffer), length: bytesRead, encoding: String.Encoding.ascii.rawValue)! as String 
      } else { 
       print("# Stream read() error") 
      } 
     } 
     self.onComing(output) 
    } 

    func write(message:String) { 
     let encodedDataArray = [UInt8]("\(message)\n".utf8) 
     self.outputStream?.write(encodedDataArray, maxLength: encodedDataArray.count) 
    } 
} 

你的問題可以通過閱讀（）