python3+PyQt5如何創建多線程網絡應用

小編給大家分享一下python3+PyQt5如何創建多線程網絡應用，相信大部分人都還不怎么了解，因此分享這篇文章給大家參考一下，希望大家閱讀完這篇文章后大有收獲，下面讓我們一起去了解一下吧！

以下為TCP客戶端的程序代碼：

#!/usr/bin/env python3

import sys
from PyQt5.QtCore import (QByteArray, QDataStream, QDate, QIODevice,
    QRegExp, Qt)
from PyQt5.QtWidgets import (QApplication, QDateEdit, QFrame, QGridLayout,
    QHBoxLayout, QLabel, QLineEdit, QPushButton,
    QWidget)
from PyQt5.QtGui import QRegExpValidator
from PyQt5.QtNetwork import (QTcpSocket,)

MAC = True
try:
  from PyQt5.QtGui import qt_mac_set_native_menubar
except ImportError:
  MAC = False

PORT = 9407
SIZEOF_UINT16 = 2


class BuildingServicesClient(QWidget):

  def __init__(self, parent=None):
    super(BuildingServicesClient, self).__init__(parent)

    self.socket = QTcpSocket()
    self.nextBlockSize = 0
    self.request = None

    roomLabel = QLabel("&Room")
    self.roomEdit = QLineEdit()
    roomLabel.setBuddy(self.roomEdit)
    regex = QRegExp(r"[0-9](?:0[1-9]|[12][0-9]|3[0-4])")
    self.roomEdit.setValidator(QRegExpValidator(regex, self))
    self.roomEdit.setAlignment(Qt.AlignRight|Qt.AlignVCenter)
    dateLabel = QLabel("&Date")
    self.dateEdit = QDateEdit()
    dateLabel.setBuddy(self.dateEdit)
    self.dateEdit.setAlignment(Qt.AlignRight|Qt.AlignVCenter)
    self.dateEdit.setDate(QDate.currentDate().addDays(1))
    self.dateEdit.setDisplayFormat("yyyy-MM-dd")
    responseLabel = QLabel("Response")
    self.responseLabel = QLabel()
    self.responseLabel.setFrameStyle(QFrame.StyledPanel|QFrame.Sunken)

    self.bookButton = QPushButton("&Book")
    self.bookButton.setEnabled(False)
    self.unBookButton = QPushButton("&Unbook")
    self.unBookButton.setEnabled(False)
    quitButton = QPushButton("&Quit")
    if not MAC:
      self.bookButton.setFocusPolicy(Qt.NoFocus)
      self.unBookButton.setFocusPolicy(Qt.NoFocus)

    buttonLayout = QHBoxLayout()
    buttonLayout.addWidget(self.bookButton)
    buttonLayout.addWidget(self.unBookButton)
    buttonLayout.addStretch()
    buttonLayout.addWidget(quitButton)
    layout = QGridLayout()
    layout.addWidget(roomLabel, 0, 0)
    layout.addWidget(self.roomEdit, 0, 1)
    layout.addWidget(dateLabel, 0, 2)
    layout.addWidget(self.dateEdit, 0, 3)
    layout.addWidget(responseLabel, 1, 0)
    layout.addWidget(self.responseLabel, 1, 1, 1, 3)
    layout.addLayout(buttonLayout, 2, 1, 1, 4)
    self.setLayout(layout)

    self.socket.connected.connect(self.sendRequest)
    self.socket.readyRead.connect(self.readResponse)
    self.socket.disconnected.connect(self.serverHasStopped)
    #self.connect(self.socket,
    #       SIGNAL("error(QAbstractSocket::SocketError)"),
     #      self.serverHasError)
    self.socket.error.connect(self.serverHasError)
    self.roomEdit.textEdited.connect(self.updateUi)
    self.dateEdit.dateChanged.connect(self.updateUi)

    self.bookButton.clicked.connect(self.book)
    self.unBookButton.clicked.connect(self.unBook)
    quitButton.clicked.connect(self.close)

    self.setWindowTitle("Building Services")


  def updateUi(self):
    enabled = False
    if (self.roomEdit.text() and
      self.dateEdit.date() > QDate.currentDate()):
      enabled = True
    if self.request is not None:
      enabled = False
    self.bookButton.setEnabled(enabled)
    self.unBookButton.setEnabled(enabled)


  def closeEvent(self, event):
    self.socket.close()
    event.accept()


  def book(self):
    self.issueRequest("BOOK", self.roomEdit.text(),
             self.dateEdit.date())


  def unBook(self):
    self.issueRequest("UNBOOK", self.roomEdit.text(),
             self.dateEdit.date())


  def issueRequest(self, action, room, date):
    self.request = QByteArray()
    stream = QDataStream(self.request, QIODevice.WriteOnly)
    stream.setVersion(QDataStream.Qt_5_7)
    stream.writeUInt16(0)
    stream.writeQString(action)
    stream.writeQString(room)
    stream << date
    stream.device().seek(0)
    stream.writeUInt16(self.request.size() - SIZEOF_UINT16)#overwrite seek(0)
    self.updateUi()
    if self.socket.isOpen():
      self.socket.close()
    self.responseLabel.setText("Connecting to server...")
    self.socket.connectToHost("localhost", PORT)


  def sendRequest(self):
    self.responseLabel.setText("Sending request...")
    self.nextBlockSize = 0
    self.socket.write(self.request)
    self.request = None


  def readResponse(self):
    stream = QDataStream(self.socket)
    stream.setVersion(QDataStream.Qt_5_7)

    while True:
      if self.nextBlockSize == 0:
        if self.socket.bytesAvailable() < SIZEOF_UINT16:
          break
        self.nextBlockSize = stream.readUInt16()
      if self.socket.bytesAvailable() < self.nextBlockSize:
        break
      action = ""
      room = ""
      date = QDate()
      #stream >> action >> room
      action=stream.readQString()
      room=stream.readQString()
      if action != "ERROR":
        stream >> date
      if action == "ERROR":
        msg = "Error: {0}".format(room)
      elif action == "BOOK":
        msg = "Booked room {0} for {1}".format(room,date.toString(Qt.ISODate))
      elif action == "UNBOOK":
        msg = "Unbooked room {0} for {1}".format(room,date.toString(Qt.ISODate))
      self.responseLabel.setText(msg)
      self.updateUi()
      self.nextBlockSize = 0


  def serverHasStopped(self):
    self.responseLabel.setText(
        "Error: Connection closed by server")
    self.socket.close()


  def serverHasError(self, error):
    self.responseLabel.setText("Error: {0}".format(self.socket.errorString()))
    self.socket.close()


app = QApplication(sys.argv)
form = BuildingServicesClient()
form.show()
app.exec_()

以下為TCP服務端的程序代碼：

#!/usr/bin/env python3
import bisect
import collections
import sys
from PyQt5.QtCore import (QByteArray, QDataStream, QDate, QReadWriteLock, QThread,QIODevice, Qt)
from PyQt5.QtWidgets import (QApplication, QMessageBox, QPushButton)
from PyQt5.QtNetwork import (QAbstractSocket,QHostAddress, QTcpServer, QTcpSocket)

PORT = 9407
SIZEOF_UINT16 = 2
MAX_BOOKINGS_PER_DAY = 5

# Key = date, value = list of room IDs
Bookings = collections.defaultdict(list)


def printBookings():
  for key in sorted(Bookings):
    print(key, Bookings[key])
  print()


class Thread(QThread):

  lock = QReadWriteLock()

  def __init__(self, socketId, parent):
    super(Thread, self).__init__(parent)
    self.socketId = socketId


  def run(self):
    socket = QTcpSocket()
    if not socket.setSocketDescriptor(self.socketId):
      #self.emit(SIGNAL("error(int)"), socket.error())
      self.error.connect(socket.error)
      return
    while socket.state() == QAbstractSocket.ConnectedState:
      nextBlockSize = 0
      stream = QDataStream(socket)
      stream.setVersion(QDataStream.Qt_5_7)
      if (socket.waitForReadyRead() and
        socket.bytesAvailable() >= SIZEOF_UINT16):
        nextBlockSize = stream.readUInt16()
      else:
        self.sendError(socket, "Cannot read client request")
        return
      if socket.bytesAvailable() < nextBlockSize:
        if (not socket.waitForReadyRead(60000) or
          socket.bytesAvailable() < nextBlockSize):
          self.sendError(socket, "Cannot read client data")
          return
      action = ""
      room = ""
      date = QDate()
      action=stream.readQString()
      if action in ("BOOK", "UNBOOK"):
        room=stream.readQString()
        stream >> date
        try:
          Thread.lock.lockForRead()
          bookings = Bookings.get(date.toPyDate())
        finally:
          Thread.lock.unlock()
        uroom = str(room)
      if action == "BOOK":
        newlist = False
        try:
          Thread.lock.lockForRead()
          if bookings is None:
            newlist = True
        finally:
          Thread.lock.unlock()
        if newlist:
          try:
            Thread.lock.lockForWrite()
            bookings = Bookings[date.toPyDate()]
          finally:
            Thread.lock.unlock()
        error = None
        insert = False
        try:
          Thread.lock.lockForRead()
          if len(bookings) < MAX_BOOKINGS_PER_DAY:
            if uroom in bookings:
              error = "Cannot accept duplicate booking"
            else:
              insert = True
          else:
            error = "{0} is fully booked".format(date.toString(Qt.ISODate))
        finally:
          Thread.lock.unlock()
        if insert:
          try:
            Thread.lock.lockForWrite()
            bisect.insort(bookings, uroom)
          finally:
            Thread.lock.unlock()
          self.sendReply(socket, action, room, date)
        else:
          self.sendError(socket, error)
      elif action == "UNBOOK":
        error = None
        remove = False
        try:
          Thread.lock.lockForRead()
          if bookings is None or uroom not in bookings:
            error = "Cannot unbook nonexistent booking"
          else:
            remove = True
        finally:
          Thread.lock.unlock()
        if remove:
          try:
            Thread.lock.lockForWrite()
            bookings.remove(uroom)
          finally:
            Thread.lock.unlock()
          self.sendReply(socket, action, room, date)
        else:
          self.sendError(socket, error)
      else:
        self.sendError(socket, "Unrecognized request")
      socket.waitForDisconnected()
      try:
        Thread.lock.lockForRead()
        printBookings()
      finally:
        Thread.lock.unlock()


  def sendError(self, socket, msg):
    reply = QByteArray()
    stream = QDataStream(reply, QIODevice.WriteOnly)
    stream.setVersion(QDataStream.Qt_5_7)
    stream.writeUInt16(0)
    stream.writeQString("ERROR")
    stream.writeQString(msg)
    stream.device().seek(0)
    stream.writeUInt16(reply.size() - SIZEOF_UINT16)
    socket.write(reply)

  def sendReply(self, socket, action, room, date):
    reply = QByteArray()
    stream = QDataStream(reply, QIODevice.WriteOnly)
    stream.setVersion(QDataStream.Qt_5_7)
    stream.writeUInt16(0)
    stream.writeQString(action)
    stream.writeQString(room)
    stream<<date
    stream.device().seek(0)
    stream.writeUInt16(reply.size() - SIZEOF_UINT16)
    socket.write(reply)

class TcpServer(QTcpServer):

  def __init__(self, parent=None):
    super(TcpServer, self).__init__(parent)


  def incomingConnection(self, socketId):
    thread = Thread(socketId, self)
    #self.connect(thread, SIGNAL("finished()"),
    #       thread, SLOT("deleteLater()"))
    thread.finished.connect(thread.deleteLater)
    thread.start()


class BuildingServicesDlg(QPushButton):

  def __init__(self, parent=None):
    super(BuildingServicesDlg, self).__init__(
        "&Close Server", parent)
    self.setWindowFlags(Qt.WindowStaysOnTopHint)

    self.loadBookings()
    self.tcpServer = TcpServer(self)
    if not self.tcpServer.listen(QHostAddress("0.0.0.0"), PORT):
      QMessageBox.critical(self, "Building Services Server","Failed to start server: {0}".format(self.tcpServer.errorString()))
      self.close()
      return

    self.clicked.connect(self.close)
    font = self.font()
    font.setPointSize(24)
    self.setFont(font)
    self.setWindowTitle("Building Services Server")


  def loadBookings(self):
    # Generate fake data
    import random

    today = QDate.currentDate()
    for i in range(10):
      date = today.addDays(random.randint(7, 60))
      for j in range(random.randint(1, MAX_BOOKINGS_PER_DAY)):
        # Rooms are 001..534 excl. 100, 200, ..., 500
        floor = random.randint(0, 5)
        room = random.randint(1, 34)
        bookings = Bookings[date.toPyDate()]
        if len(bookings) >= MAX_BOOKINGS_PER_DAY:
          continue
        bisect.insort(bookings, "{0:1d}{1:02d}".format(
               floor, room))
    printBookings()


app = QApplication(sys.argv)
form = BuildingServicesDlg()
form.show()
form.move(0, 0)
app.exec_()

以上是“python3+PyQt5如何創建多線程網絡應用”這篇文章的所有內容，感謝各位的閱讀！相信大家都有了一定的了解，希望分享的內容對大家有所幫助，如果還想學習更多知識，歡迎關注億速云行業資訊頻道！