本文在上文的基礎上重新實現支持多線程的服務器。

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<

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_()

以上這篇python3+PyQt5 創建多線程網絡應用-TCP客戶端和TCP服務器實例就是小編分享給大家的全部內容了，希望能給大家一個參考，也希望大家多多支持腳本之家。

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