eric6/WebBrowser/UserAgent/UserAgentManager.py

Sat, 27 Feb 2021 12:08:23 +0100

author
Detlev Offenbach <detlev@die-offenbachs.de>
date
Sat, 27 Feb 2021 12:08:23 +0100
changeset 8138
169e65a6787c
parent 7923
91e843545d9a
child 8143
2c730d5fd177
permissions
-rw-r--r--

Shell: added functionality to show a prompt when the main client process has exited (e.g. a script ended).

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1 # -*- coding: utf-8 -*-
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2
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91e843545d9a Updated copyright for 2021.
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3 # Copyright (c) 2012 - 2021 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 user agent manager.
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8 """
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9
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10 import os
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11
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12 from PyQt5.QtCore import pyqtSignal, QObject, QXmlStreamReader
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13
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14 from E5Gui import E5MessageBox
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15
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16 from Utilities.AutoSaver import AutoSaver
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17 import Utilities
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18
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19
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20 class UserAgentManager(QObject):
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21 """
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22 Class implementing a user agent manager.
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23
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24 @signal changed() emitted to indicate a change
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25 @signal userAgentSettingsSaved() emitted after the user agent settings
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26 were saved
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27 """
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28 changed = pyqtSignal()
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29 userAgentSettingsSaved = pyqtSignal()
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30
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31 def __init__(self, parent=None):
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32 """
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33 Constructor
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34
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35 @param parent reference to the parent object (QObject)
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36 """
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T.Rzepka <Tobias.Rzepka@gmail.com>
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37 super(UserAgentManager, self).__init__(parent)
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38
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39 self.__agents = {}
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40 # dictionary with agent strings indexed by host name
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41 self.__loaded = False
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42 self.__saveTimer = AutoSaver(self, self.save)
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43
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44 self.changed.connect(self.__saveTimer.changeOccurred)
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45
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46 def getFileName(self):
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47 """
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48 Public method to get the file name of the user agents file.
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49
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50 @return name of the user agents file (string)
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51 """
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52 return os.path.join(
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53 Utilities.getConfigDir(), "web_browser", "userAgentSettings.xml")
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54
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55 def save(self):
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56 """
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57 Public slot to save the user agent entries to disk.
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58 """
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59 if not self.__loaded:
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60 return
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61
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62 from .UserAgentWriter import UserAgentWriter
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63 agentFile = self.getFileName()
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64 writer = UserAgentWriter()
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65 if not writer.write(agentFile, self.__agents):
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66 E5MessageBox.critical(
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67 None,
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68 self.tr("Saving user agent data"),
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69 self.tr(
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70 """<p>User agent data could not be saved to"""
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71 """ <b>{0}</b></p>""").format(agentFile))
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72 else:
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73 self.userAgentSettingsSaved.emit()
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74
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75 def __load(self):
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76 """
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77 Private method to load the saved user agent settings.
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78 """
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79 agentFile = self.getFileName()
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80 from .UserAgentReader import UserAgentReader
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81 reader = UserAgentReader()
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82 self.__agents = reader.read(agentFile)
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83 if reader.error() != QXmlStreamReader.NoError:
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84 E5MessageBox.warning(
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85 None,
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86 self.tr("Loading user agent data"),
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87 self.tr("""Error when loading user agent data on"""
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88 """ line {0}, column {1}:\n{2}""")
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89 .format(reader.lineNumber(),
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90 reader.columnNumber(),
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91 reader.errorString()))
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92
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93 self.__loaded = True
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94
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95 def reload(self):
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96 """
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97 Public method to reload the user agent settings.
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98 """
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99 if not self.__loaded:
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100 return
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101
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102 self.__agents = {}
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103 self.__load()
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104
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105 def close(self):
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106 """
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107 Public method to close the user agents manager.
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108 """
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109 self.__saveTimer.saveIfNeccessary()
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110
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111 def removeUserAgent(self, host):
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112 """
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113 Public method to remove a user agent entry.
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114
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115 @param host host name (string)
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116 """
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117 if host in self.__agents:
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118 del self.__agents[host]
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119 self.changed.emit()
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120
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121 def allHostNames(self):
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122 """
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123 Public method to get a list of all host names we a user agent setting
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124 for.
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125
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126 @return sorted list of all host names (list of strings)
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127 """
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128 if not self.__loaded:
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129 self.__load()
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130
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131 return sorted(self.__agents.keys())
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132
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133 def hostsCount(self):
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134 """
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135 Public method to get the number of available user agent settings.
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136
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137 @return number of user agent settings (integer)
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138 """
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139 if not self.__loaded:
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140 self.__load()
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141
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142 return len(self.__agents)
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143
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144 def userAgent(self, host):
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145 """
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146 Public method to get the user agent setting for a host.
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147
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148 @param host host name (string)
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149 @return user agent string (string)
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150 """
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151 if not self.__loaded:
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152 self.__load()
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153
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154 for agentHost in self.__agents:
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155 if host.endswith(agentHost):
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156 return self.__agents[agentHost]
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157
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158 return ""
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159
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160 def setUserAgent(self, host, agent):
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161 """
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162 Public method to set the user agent string for a host.
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163
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164 @param host host name (string)
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165 @param agent user agent string (string)
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166 """
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167 if host != "" and agent != "":
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168 self.__agents[host] = agent
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169 self.changed.emit()
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170
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171 def userAgentForUrl(self, url):
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172 """
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173 Public method to determine the user agent for the given URL.
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174
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175 @param url URL to determine user agent for (QUrl)
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176 @return user agent string (string)
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177 """
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178 if url.isValid():
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179 host = url.host()
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180 return self.userAgent(host)
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181
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182 return ""
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183
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184 def setUserAgentForUrl(self, url, agent):
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185 """
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186 Public method to set the user agent string for an URL.
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187
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188 @param url URL to register user agent setting for (QUrl)
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189 @param agent new current user agent string (string)
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190 """
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191 if url.isValid():
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192 host = url.host()
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193 self.setUserAgent(host, agent)

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