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python3+PyQt5 创建多线程网络应用-TCP客户端和TCP服务器实例

转载 作者：qq735679552 更新时间：2022-09-28 22:32:09 27 4
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这篇CFSDN的博客文章python3+PyQt5 创建多线程网络应用-TCP客户端和TCP服务器实例由作者收集整理，如果你对这篇文章有兴趣，记得点赞哟.

本文在上文的基础上重新实现支持多线程的服务器.

以下为tcp客户端的程序代码:

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#!/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:

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#!/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_()

以上这篇python3+pyqt5 创建多线程网络应用-tcp客户端和tcp服务器实例就是小编分享给大家的全部内容了，希望能给大家一个参考，也希望大家多多支持我.

原文链接：https://blog.csdn.net/xiaoyangyang20/article/details/71375442 。

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