Helpviewer/UserAgent/UserAgentManager.py

Wed, 15 Feb 2012 14:27:43 +0100

author
Detlev Offenbach <detlev@die-offenbachs.de>
date
Wed, 15 Feb 2012 14:27:43 +0100
changeset 1621
85653d5d3bf9
parent 1596
8d59e4f3c828
child 1623
6b9654035a7c
permissions
-rw-r--r--

Extended some web browser manager objects to provide a method to get the name of their config file.

1596
8d59e4f3c828 Extended the User Agent handling to be able to set the string on a host basis (next to the global user agent string).
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
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1 # -*- coding: utf-8 -*-
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2
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3 # Copyright (c) 2012 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
8d59e4f3c828 Extended the User Agent handling to be able to set the string on a host basis (next to the global user agent string).
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10 import os
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11
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12 from PyQt4.QtCore import pyqtSignal, QObject
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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 """
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26 changed = pyqtSignal()
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27
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28 def __init__(self, parent=None):
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29 """
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30 Constructor
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31
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32 @param parent reference to the parent object (QObject)
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33 """
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34 super().__init__(parent)
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35
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36 self.__agents = {} # dictionary with agent strings indexed by host name
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37 self.__loaded = False
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38 self.__saveTimer = AutoSaver(self, self.save)
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39
8d59e4f3c828 Extended the User Agent handling to be able to set the string on a host basis (next to the global user agent string).
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40 self.changed.connect(self.__saveTimer.changeOccurred)
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41
1621
85653d5d3bf9 Extended some web browser manager objects to provide a method to get the name of their config file.
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42 def getFileName(self):
85653d5d3bf9 Extended some web browser manager objects to provide a method to get the name of their config file.
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43 """
85653d5d3bf9 Extended some web browser manager objects to provide a method to get the name of their config file.
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44 Public method to get the file name of the user agents file.
85653d5d3bf9 Extended some web browser manager objects to provide a method to get the name of their config file.
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parents: 1596
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45
85653d5d3bf9 Extended some web browser manager objects to provide a method to get the name of their config file.
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46 @return name of the user agents file (string)
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47 """
85653d5d3bf9 Extended some web browser manager objects to provide a method to get the name of their config file.
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48 return os.path.join(Utilities.getConfigDir(), "browser", "userAgentSettings")
85653d5d3bf9 Extended some web browser manager objects to provide a method to get the name of their config file.
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parents: 1596
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49
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50 def save(self):
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51 """
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52 Public slot to save the user agent entries to disk.
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53 """
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54 if not self.__loaded:
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55 return
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56
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57 agentFile = self.getFileName()
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58 try:
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59 f = open(agentFile, "w", encoding="utf-8")
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60 for host, agent in self.__agents.items():
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61 f.write("{0}@@{1}\n".format(host, agent))
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62 f.close()
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63 except IOError as err:
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64 E5MessageBox.critical(None,
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65 self.trUtf8("Saving user agent data"),
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66 self.trUtf8("""<p>User agent data could not be saved to <b>{0}</b></p>"""
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67 """<p>Reason: {1}</p>""").format(agentFile, str(err)))
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68 return
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69
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70 def __load(self):
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71 """
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72 Private method to load the saved user agent settings.
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73 """
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74 agentFile = self.getFileName()
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75 if os.path.exists(agentFile):
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76 try:
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77 f = open(agentFile, "r", encoding="utf-8")
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78 lines = f.read()
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79 f.close()
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80 except IOError as err:
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81 E5MessageBox.critical(None,
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82 self.trUtf8("Loading user agent data"),
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83 self.trUtf8("""<p>User agent data could not be loaded """
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84 """from <b>{0}</b></p>"""
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85 """<p>Reason: {1}</p>""")\
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86 .format(agentFile, str(err)))
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87 return
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88
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89 for line in lines.splitlines():
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90 if not line or \
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91 line.startswith("#") or \
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92 "@@" not in line:
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93 continue
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94
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95 host, agent = line.split("@@", 1)
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96 self.__agents[host] = agent
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97
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98 self.__loaded = True
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99
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100 def close(self):
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101 """
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102 Public method to close the user agents manager.
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103 """
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104 self.__saveTimer.saveIfNeccessary()
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105
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106 def removeUserAgent(self, host):
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107 """
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108 Public method to remove a user agent entry.
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109
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110 @param host host name (string)
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111 """
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112 if host in self.__agents:
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113 del self.__agents[host]
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114 self.changed.emit()
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115
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116 def allHostNames(self):
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117 """
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118 Public method to get a list of all host names we a user agent setting for.
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119
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120 @return sorted list of all host names (list of strings)
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121 """
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122 if not self.__loaded:
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123 self.__load()
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124
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125 return sorted(self.__agents.keys())
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126
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127 def hostsCount(self):
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128 """
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129 Public method to get the number of available user agent settings.
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130
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131 @return number of user agent settings (integer)
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132 """
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133 if not self.__loaded:
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134 self.__load()
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135
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136 return len(self.__agents)
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137
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138 def userAgent(self, host):
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139 """
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140 Public method to get the user agent setting for a host.
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141
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142 @param host host name (string)
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143 @return user agent string (string)
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144 """
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145 if not self.__loaded:
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146 self.__load()
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147
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148 if host not in self.__agents:
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149 return ""
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150
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151 return self.__agents[host]
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152
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153 def setUserAgent(self, host, agent):
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154 """
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155 Public method to set the user agent string for a host.
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156
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157 @param host host name (string)
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158 @param agent user agent string (string)
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159 """
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160 if host != "" and agent != "":
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161 self.__agents[host] = agent
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162 self.changed.emit()
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163
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164 def userAgentForUrl(self, url):
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165 """
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166 Publci method to determine the user agent for the given URL.
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167
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168 @param url URL to determine user agent for (QUrl)
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169 @return user agent string (string)
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170 """
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171 if url.isValid():
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172 host = url.host()
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173 return self.userAgent(host)
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174
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175 return ""
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176
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177 def setUserAgentForUrl(self, url, agent):
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178 """
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179 Public method to set the user agent string for an URL.
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180
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181 @param url URL to register user agent setting for (QUrl)
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182 @param agent new current user agent string (string)
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183 """
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184 if url.isValid():
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185 host = url.host()
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186 self.setUserAgent(host, agent)

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