Cooperation/Connection.py

Fri, 26 Mar 2010 15:43:36 +0000

author
Detlev Offenbach <detlev@die-offenbachs.de>
date
Fri, 26 Mar 2010 15:43:36 +0000
changeset 155
375e3c884874
parent 149
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child 162
28f235c426c4
permissions
-rw-r--r--

Added code to transmit selections to remote editors.

149
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Detlev Offenbach <detlev@die-offenbachs.de>
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1 # -*- coding: utf-8 -*-
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2
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3 # Copyright (c) 2010 Detlev Offenbach <detlev@die-offenbachs.de>
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4 #
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5
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6 """
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7 Module implementing a class representing a peer connection.
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8 """
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9
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10 from PyQt4.QtCore import pyqtSignal, QTimer, QTime, QByteArray
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11 from PyQt4.QtNetwork import QTcpSocket
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12
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13 MaxBufferSize = 1024 * 1024
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14 TransferTimeout = 30 * 1000
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15 PongTimeout = 60 * 1000
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16 PingInterval = 5 * 1000
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17 SeparatorToken = '|||'
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18
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19
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20 class Connection(QTcpSocket):
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21 """
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22 Class representing a peer connection.
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23
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24 @signal readyForUse() emitted when the connection is ready for use
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25 @signal newMessage(user, message) emitted after a new message has
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26 arrived (string, string)
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27 @signal getParticipants() emitted after a get participants message has arrived
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28 @signal participants(participants) emitted after the list of participants has
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29 arrived (list of strings of "host:port")
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30 """
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31 WaitingForGreeting = 0
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32 ReadingGreeting = 1
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33 ReadyForUse = 2
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34
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35 PlainText = 0
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36 Ping = 1
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37 Pong = 2
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38 Greeting = 3
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39 GetParticipants = 4
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40 Participants = 5
155
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41 Editor = 6
149
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42 Undefined = 99
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43
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44 ProtocolMessage = "MESSAGE"
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45 ProtocolPing = "PING"
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46 ProtocolPong = "PONG"
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47 ProtocolGreeting = "GREETING"
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48 ProtocolGetParticipants = "GET_PARTICIPANTS"
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49 ProtocolParticipants = "PARTICIPANTS"
155
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50 ProtocolEditor = "EDITOR"
149
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51
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52 readyForUse = pyqtSignal()
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53 newMessage = pyqtSignal(str, str)
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54 getParticipants = pyqtSignal()
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55 participants = pyqtSignal(list)
155
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56 editorCommand = pyqtSignal(str, str, str)
149
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57
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58 def __init__(self, parent = None):
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59 """
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60 Constructor
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61
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62 @param parent referenec to the parent object (QObject)
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63 """
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64 QTcpSocket.__init__(self, parent)
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65
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66 self.__greetingMessage = self.trUtf8("undefined")
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67 self.__username = self.trUtf8("unknown")
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68 self.__serverPort = 0
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69 self.__state = Connection.WaitingForGreeting
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70 self.__currentDataType = Connection.Undefined
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71 self.__numBytesForCurrentDataType = -1
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72 self.__transferTimerId = 0
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73 self.__isGreetingMessageSent = False
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74 self.__pingTimer = QTimer()
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75 self.__pingTimer.setInterval(PingInterval)
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76 self.__pongTime = QTime()
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77 self.__buffer = QByteArray()
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78
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79 self.readyRead.connect(self.__processReadyRead)
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80 self.disconnected.connect(self.__pingTimer.stop)
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81 self.__pingTimer.timeout.connect(self.__sendPing)
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82 self.connected.connect(self.__sendGreetingMessage)
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83
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84 def name(self):
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85 """
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86 Public method to get the connection name.
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87
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88 @return connection name (string)
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89 """
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90 return self.__username
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91
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92 def serverPort(self):
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93 """
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94 Public method to get the server port.
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95
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96 @return server port (integer)
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97 """
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98 return self.__serverPort
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99
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100 def setGreetingMessage(self, message, serverPort):
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101 """
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102 Public method to set the greeting message.
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103
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104 @param message greeting message (string)
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105 """
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106 self.__greetingMessage = "{0}:{1}".format(message, serverPort)
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107
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108 def sendMessage(self, message):
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109 """
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110 Public method to send a message.
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111
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112 @param message message to be sent (string)
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113 @return flag indicating a successful send (boolean)
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114 """
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115 if message == "":
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116 return False
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117
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118 msg = QByteArray(message.encode("utf-8"))
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119 data = QByteArray("{0}{1}{2}{1}".format(
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120 Connection.ProtocolMessage, SeparatorToken, msg.size())) + msg
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121 return self.write(data) == data.size()
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122
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123 def timerEvent(self, evt):
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124 """
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125 Protected method to handle timer events.
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126
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127 @param evt reference to the timer event (QTimerEvent)
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128 """
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129 if evt.timerId() == self.__transferTimerId:
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130 self.abort()
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131 self.killTimer(self.__transferTimerId)
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132 self.__transferTimerId = 0
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133
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134 def __processReadyRead(self):
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135 """
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136 Private slot to handle the readyRead signal.
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137 """
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138 if self.__state == Connection.WaitingForGreeting:
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139 if not self.__readProtocolHeader():
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diff changeset
140 return
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
141 if self.__currentDataType != Connection.Greeting:
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
142 self.abort()
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
143 return
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
144 self.__state = Connection.ReadingGreeting
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
145
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
146 if self.__state == Connection.ReadingGreeting:
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
147 if not self.__hasEnoughData():
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
148 return
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
149
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
150 self.__buffer = QByteArray(self.read(self.__numBytesForCurrentDataType))
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
151 if self.__buffer.size() != self.__numBytesForCurrentDataType:
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
152 self.abort()
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
153 return
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
154
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
155 user, serverPort = str(self.__buffer, encoding = "utf-8").split(":")
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
156 self.__serverPort = int(serverPort)
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
157 self.__username = "{0}@{1}:{2}".format(
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
158 user,
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
159 self.peerAddress().toString(),
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
160 self.peerPort()
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
161 )
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
162 self.__currentDataType = Connection.Undefined
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
163 self.__numBytesForCurrentDataType = 0
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
164 self.__buffer.clear()
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
165
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
166 if not self.isValid():
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
167 self.abort()
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
168 return
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
169
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
170 if not self.__isGreetingMessageSent:
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
171 self.__sendGreetingMessage()
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
172
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
173 self.__pingTimer.start()
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
174 self.__pongTime.start()
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
175 self.__state = Connection.ReadyForUse
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
176 self.readyForUse.emit()
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
177
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
178 while self.bytesAvailable():
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
179 if self.__currentDataType == Connection.Undefined:
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
180 if not self.__readProtocolHeader():
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
181 return
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
182
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
183 if not self.__hasEnoughData():
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
184 return
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
185
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
186 self.__processData()
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
187
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
188 def __sendPing(self):
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
189 """
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
190 Private slot to send a ping message.
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
191 """
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
192 if self.__pongTime.elapsed() > PongTimeout:
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
193 self.abort()
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
194 return
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
195
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
196 self.write("{0}{1}1{1}p".format(Connection.ProtocolPing, SeparatorToken))
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
197
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
198 def __sendGreetingMessage(self):
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
199 """
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
200 Private slot to send a greeting message.
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
201 """
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
202 greeting = QByteArray(self.__greetingMessage.encode("utf-8"))
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
203 data = QByteArray("{0}{1}{2}{1}".format(
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
204 Connection.ProtocolGreeting, SeparatorToken, greeting.size())) + greeting
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
205 if self.write(data) == data.size():
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
206 self.__isGreetingMessageSent = True
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
207
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
208 def __readDataIntoBuffer(self, maxSize = MaxBufferSize):
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
209 """
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
210 Private method to read some data into the buffer.
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
211
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
212 @param maxSize maximum size of data to read (integer)
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
213 @return size of data read (integer)
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
214 """
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
215 if maxSize > MaxBufferSize:
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
216 return 0
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
217
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
218 numBytesBeforeRead = self.__buffer.size()
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
219 if numBytesBeforeRead == MaxBufferSize:
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
220 self.abort()
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
221 return 0
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
222
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
223 while self.bytesAvailable() and self.__buffer.size() < maxSize:
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
224 self.__buffer.append(self.read(1))
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
225 if self.__buffer.endsWith(SeparatorToken):
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
226 break
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
227
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
228 return self.__buffer.size() - numBytesBeforeRead
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
229
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
230 def __dataLengthForCurrentDataType(self):
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
231 """
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
232 Private method to get the data length for the current data type.
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
233
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
234 @return data length (integer)
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
235 """
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
236 if self.bytesAvailable() <= 0 or \
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
237 self.__readDataIntoBuffer() <= 0 or \
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
238 not self.__buffer.endsWith(SeparatorToken):
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
239 return 0
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
240
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
241 self.__buffer.chop(len(SeparatorToken))
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
242 number = self.__buffer.toInt()[0]
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
243 self.__buffer.clear()
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
244 return number
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
245
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
246 def __readProtocolHeader(self):
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
247 """
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
248 Private method to read the protocol header.
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
249
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
250 @return flag indicating a successful read (boolean)
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
251 """
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
252 if self.__transferTimerId:
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
253 self.killTimer(self.__transferTimerId)
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
254 self.__transferTimerId = 0
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
255
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
256 if self.__readDataIntoBuffer() <= 0:
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
257 self.__transferTimerId = self.startTimer(TransferTimeout)
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
258 return False
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
259
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
260 self.__buffer.chop(len(SeparatorToken))
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
261 if self.__buffer == Connection.ProtocolPing:
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
262 self.__currentDataType = Connection.Ping
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
263 elif self.__buffer == Connection.ProtocolPong:
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
264 self.__currentDataType = Connection.Pong
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
265 elif self.__buffer == Connection.ProtocolMessage:
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
266 self.__currentDataType = Connection.PlainText
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
267 elif self.__buffer == Connection.ProtocolGreeting:
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
268 self.__currentDataType = Connection.Greeting
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
269 elif self.__buffer == Connection.ProtocolGetParticipants:
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
270 self.__currentDataType = Connection.GetParticipants
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
271 elif self.__buffer == Connection.ProtocolParticipants:
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
272 self.__currentDataType = Connection.Participants
155
375e3c884874 Added code to transmit selections to remote editors.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 149
diff changeset
273 elif self.__buffer == Connection.ProtocolEditor:
375e3c884874 Added code to transmit selections to remote editors.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 149
diff changeset
274 self.__currentDataType = Connection.Editor
149
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
275 else:
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
276 self.__currentDataType = Connection.Undefined
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
277 self.abort()
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
278 return False
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
279
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
280 self.__buffer.clear()
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
281 self.__numBytesForCurrentDataType = self.__dataLengthForCurrentDataType()
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
282 return True
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
283
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
284 def __hasEnoughData(self):
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
285 """
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
286 Private method to check, if enough data is available.
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
287
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
288 @return flag indicating availability of enough data (boolean)
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
289 """
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
290 if self.__transferTimerId:
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
291 self.killTimer(self.__transferTimerId)
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
292 self.__transferTimerId = 0
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
293
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
294 if self.__numBytesForCurrentDataType <= 0:
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
295 self.__numBytesForCurrentDataType = self.__dataLengthForCurrentDataType()
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
296
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
297 if self.bytesAvailable() < self.__numBytesForCurrentDataType or \
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
298 self.__numBytesForCurrentDataType <= 0:
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
299 self.__transferTimerId = self.startTimer(TransferTimeout)
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
300 return False
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
301
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
302 return True
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
303
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
304 def __processData(self):
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
305 """
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
306 Private method to process the received data.
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
307 """
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
308 self.__buffer = QByteArray(self.read(self.__numBytesForCurrentDataType))
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
309 if self.__buffer.size() != self.__numBytesForCurrentDataType:
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
310 self.abort()
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
311 return
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
312
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
313 if self.__currentDataType == Connection.PlainText:
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
314 self.newMessage.emit(self.__username, str(self.__buffer, encoding = "utf-8"))
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
315 elif self.__currentDataType == Connection.Ping:
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
316 self.write("{0}{1}1{1}p".format(Connection.ProtocolPong, SeparatorToken))
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
317 elif self.__currentDataType == Connection.Pong:
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
318 self.__pongTime.restart()
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
319 elif self.__currentDataType == Connection.GetParticipants:
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
320 self.getParticipants.emit()
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
321 elif self.__currentDataType == Connection.Participants:
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
322 msg = str(self.__buffer, encoding = "utf-8")
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
323 if msg == "<empty>":
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
324 participantsList = []
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
325 else:
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
326 participantsList = msg.split(SeparatorToken)
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
327 self.participants.emit(participantsList[:])
155
375e3c884874 Added code to transmit selections to remote editors.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 149
diff changeset
328 elif self.__currentDataType == Connection.Editor:
375e3c884874 Added code to transmit selections to remote editors.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 149
diff changeset
329 hash, fn, msg = str(self.__buffer, encoding = "utf-8").split(SeparatorToken)
375e3c884874 Added code to transmit selections to remote editors.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 149
diff changeset
330 self.editorCommand.emit(hash, fn, msg)
149
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
331
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
332 self.__currentDataType = Connection.Undefined
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
333 self.__numBytesForCurrentDataType = 0
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
334 self.__buffer.clear()
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
335
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
336 def sendGetParticipants(self):
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
337 """
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
338 Public method to request a list of participants.
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
339 """
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
340 self.write(
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
341 "{0}{1}1{1}l".format(Connection.ProtocolGetParticipants, SeparatorToken)
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
342 )
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
343
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
344 def sendParticipants(self, participants):
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
345 """
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
346 Public method to send the list of participants.
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
347
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
348 @param participants list of participants (list of strings of "host:port")
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
349 """
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
350 if participants:
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
351 message = SeparatorToken.join(participants)
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
352 else:
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
353 message = "<empty>"
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
354 msg = QByteArray(message.encode("utf-8"))
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
355 data = QByteArray("{0}{1}{2}{1}".format(
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
356 Connection.ProtocolParticipants, SeparatorToken, msg.size())) + msg
a134031209be Added stage 1 of the cooperation functions (chat system).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
357 self.write(data)
155
375e3c884874 Added code to transmit selections to remote editors.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 149
diff changeset
358
375e3c884874 Added code to transmit selections to remote editors.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 149
diff changeset
359 def sendEditorCommand(self, projectHash, filename, message):
375e3c884874 Added code to transmit selections to remote editors.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 149
diff changeset
360 """
375e3c884874 Added code to transmit selections to remote editors.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 149
diff changeset
361 Public method to send an editor command.
375e3c884874 Added code to transmit selections to remote editors.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 149
diff changeset
362
375e3c884874 Added code to transmit selections to remote editors.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 149
diff changeset
363 @param projectHash hash of the project (string)
375e3c884874 Added code to transmit selections to remote editors.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 149
diff changeset
364 @param filename project relative universal file name of
375e3c884874 Added code to transmit selections to remote editors.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 149
diff changeset
365 the sending editor (string)
375e3c884874 Added code to transmit selections to remote editors.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 149
diff changeset
366 @param message editor command to be sent (string)
375e3c884874 Added code to transmit selections to remote editors.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 149
diff changeset
367 """
375e3c884874 Added code to transmit selections to remote editors.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 149
diff changeset
368 msg = QByteArray("{0}{1}{2}{1}{3}".format(
375e3c884874 Added code to transmit selections to remote editors.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 149
diff changeset
369 projectHash, SeparatorToken, filename, message).encode("utf-8"))
375e3c884874 Added code to transmit selections to remote editors.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 149
diff changeset
370 data = QByteArray("{0}{1}{2}{1}".format(
375e3c884874 Added code to transmit selections to remote editors.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 149
diff changeset
371 Connection.ProtocolEditor, SeparatorToken, msg.size())) + msg
375e3c884874 Added code to transmit selections to remote editors.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 149
diff changeset
372 self.write(data)

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