python3+PyQt5 创建多线程网络应用-TCP客户端和TCP服务器

本文链接：https://blog.youkuaiyun.com/xiaoyangyang20/article/details/71375442

该博客介绍了如何使用Python3和PyQt5库创建支持多线程的TCP客户端和服务器应用程序，详细展示了客户端和服务端的代码实现。

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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：

#!/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<