eric6/WebBrowser/UserAgent/UserAgentManager.py

Tue, 10 Sep 2019 19:30:07 +0200

author
Detlev Offenbach <detlev@die-offenbachs.de>
date
Tue, 10 Sep 2019 19:30:07 +0200
changeset 7229
53054eb5b15a
parent 6942
2602857055c5
child 7360
9190402e4505
permissions
-rw-r--r--

Removed obsolete "from __future__ import ..." statements.

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1 # -*- coding: utf-8 -*-
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2
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ad476851d7e0 Updated copyright for 2019.
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3 # Copyright (c) 2012 - 2019 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
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11 import os
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12
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13 from PyQt5.QtCore import pyqtSignal, QObject, QXmlStreamReader
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14
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15 from E5Gui import E5MessageBox
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16
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17 from Utilities.AutoSaver import AutoSaver
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18 import Utilities
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19
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20
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21 class UserAgentManager(QObject):
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22 """
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23 Class implementing a user agent manager.
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24
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25 @signal changed() emitted to indicate a change
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26 @signal userAgentSettingsSaved() emitted after the user agent settings
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27 were saved
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28 """
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29 changed = pyqtSignal()
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30 userAgentSettingsSaved = pyqtSignal()
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31
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32 def __init__(self, parent=None):
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33 """
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34 Constructor
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35
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36 @param parent reference to the parent object (QObject)
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37 """
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38 super(UserAgentManager, self).__init__(parent)
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39
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40 self.__agents = {}
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41 # dictionary with agent strings indexed by host name
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42 self.__loaded = False
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43 self.__saveTimer = AutoSaver(self, self.save)
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44
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45 self.changed.connect(self.__saveTimer.changeOccurred)
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46
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47 def getFileName(self):
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48 """
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49 Public method to get the file name of the user agents file.
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50
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51 @return name of the user agents file (string)
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52 """
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53 return os.path.join(
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54 Utilities.getConfigDir(), "web_browser", "userAgentSettings.xml")
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55
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56 def save(self):
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57 """
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58 Public slot to save the user agent entries to disk.
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59 """
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60 if not self.__loaded:
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61 return
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62
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63 from .UserAgentWriter import UserAgentWriter
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64 agentFile = self.getFileName()
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65 writer = UserAgentWriter()
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66 if not writer.write(agentFile, self.__agents):
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67 E5MessageBox.critical(
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68 None,
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69 self.tr("Saving user agent data"),
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70 self.tr(
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71 """<p>User agent data could not be saved to"""
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72 """ <b>{0}</b></p>""").format(agentFile))
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73 else:
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74 self.userAgentSettingsSaved.emit()
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75
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76 def __load(self):
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77 """
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78 Private method to load the saved user agent settings.
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79 """
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80 agentFile = self.getFileName()
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81 from .UserAgentReader import UserAgentReader
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82 reader = UserAgentReader()
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83 self.__agents = reader.read(agentFile)
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84 if reader.error() != QXmlStreamReader.NoError:
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85 E5MessageBox.warning(
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86 None,
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87 self.tr("Loading user agent data"),
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88 self.tr("""Error when loading user agent data on"""
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89 """ line {0}, column {1}:\n{2}""")
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90 .format(reader.lineNumber(),
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91 reader.columnNumber(),
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92 reader.errorString()))
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93
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94 self.__loaded = True
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95
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96 def reload(self):
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97 """
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98 Public method to reload the user agent settings.
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99 """
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100 if not self.__loaded:
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101 return
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102
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103 self.__agents = {}
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104 self.__load()
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105
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106 def close(self):
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107 """
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108 Public method to close the user agents manager.
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109 """
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110 self.__saveTimer.saveIfNeccessary()
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111
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112 def removeUserAgent(self, host):
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113 """
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114 Public method to remove a user agent entry.
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115
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116 @param host host name (string)
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117 """
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118 if host in self.__agents:
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119 del self.__agents[host]
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120 self.changed.emit()
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121
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122 def allHostNames(self):
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123 """
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124 Public method to get a list of all host names we a user agent setting
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125 for.
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126
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127 @return sorted list of all host names (list of strings)
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128 """
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129 if not self.__loaded:
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130 self.__load()
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131
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132 return sorted(self.__agents.keys())
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133
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134 def hostsCount(self):
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135 """
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136 Public method to get the number of available user agent settings.
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137
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138 @return number of user agent settings (integer)
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139 """
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140 if not self.__loaded:
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141 self.__load()
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142
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143 return len(self.__agents)
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144
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145 def userAgent(self, host):
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146 """
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147 Public method to get the user agent setting for a host.
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148
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149 @param host host name (string)
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150 @return user agent string (string)
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151 """
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152 if not self.__loaded:
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153 self.__load()
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154
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155 for agentHost in self.__agents:
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156 if host.endswith(agentHost):
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157 return self.__agents[agentHost]
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158
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159 return ""
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160
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161 def setUserAgent(self, host, agent):
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162 """
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163 Public method to set the user agent string for a host.
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164
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165 @param host host name (string)
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166 @param agent user agent string (string)
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167 """
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168 if host != "" and agent != "":
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169 self.__agents[host] = agent
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170 self.changed.emit()
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171
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172 def userAgentForUrl(self, url):
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173 """
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174 Public method to determine the user agent for the given URL.
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175
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176 @param url URL to determine user agent for (QUrl)
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177 @return user agent string (string)
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178 """
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179 if url.isValid():
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180 host = url.host()
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181 return self.userAgent(host)
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182
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183 return ""
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184
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185 def setUserAgentForUrl(self, url, agent):
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186 """
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187 Public method to set the user agent string for an URL.
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188
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189 @param url URL to register user agent setting for (QUrl)
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190 @param agent new current user agent string (string)
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191 """
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192 if url.isValid():
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193 host = url.host()
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194 self.setUserAgent(host, agent)

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