python3+PyQt5如何创建多线程网络应用-创新互联
小编给大家分享一下python3+PyQt5如何创建多线程网络应用，相信大部分人都还不怎么了解，因此分享这篇文章给大家参考一下，希望大家阅读完这篇文章后大有收获，下面让我们一起去了解一下吧！
以下为TCP客户端的程序代码：
#!/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_()以下为TCP服务端的程序代码：
#!/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<= 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如何创建多线程网络应用”这篇文章的所有内容，感谢各位的阅读！相信大家都有了一定的了解，希望分享的内容对大家有所帮助，如果还想学习更多知识，欢迎关注创新互联行业资讯频道！
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