Mercurial > libervia-backend
annotate sat/core/log_config.py @ 2659:c26492bd2144
plugin OTR: use new "directed" attribute when registering + use new markAsEncrypted
author | Goffi <goffi@goffi.org> |
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date | Sat, 11 Aug 2018 18:24:55 +0200 |
parents | 56f94936df1e |
children | e55f871fa9db |
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1934
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1 #!/usr/bin/env python2 |
991 | 2 # -*- coding: utf-8 -*- |
3 | |
4 # SàT: a XMPP client | |
2483 | 5 # Copyright (C) 2009-2018 Jérôme Poisson (goffi@goffi.org) |
991 | 6 |
7 # This program is free software: you can redistribute it and/or modify | |
8 # it under the terms of the GNU Affero General Public License as published by | |
9 # the Free Software Foundation, either version 3 of the License, or | |
10 # (at your option) any later version. | |
11 | |
12 # This program is distributed in the hope that it will be useful, | |
13 # but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 # GNU Affero General Public License for more details. | |
16 | |
17 # You should have received a copy of the GNU Affero General Public License | |
18 # along with this program. If not, see <http://www.gnu.org/licenses/>. | |
19 | |
20 """High level logging functions""" | |
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21 # XXX: this module use standard logging module when possible, but as SàT can work in different cases where logging is not the best choice (twisted, pyjamas, etc), it is necessary to have a dedicated module. Additional feature like environment variables and colors are also managed. |
991 | 22 |
23 from sat.core.constants import Const as C | |
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24 from sat.core import log |
991 | 25 |
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26 |
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27 class TwistedLogger(log.Logger): |
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28 colors = True |
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29 force_colors = False |
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30 |
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31 def __init__(self, *args, **kwargs): |
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32 super(TwistedLogger, self).__init__(*args, **kwargs) |
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33 from twisted.python import log as twisted_log |
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34 |
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35 self.twisted_log = twisted_log |
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36 |
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37 def out(self, message, level=None): |
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38 """Actually log the message |
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39 |
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40 @param message: formatted message |
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41 """ |
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42 self.twisted_log.msg( |
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43 message.encode("utf-8", "ignore"), sat_logged=True, level=level |
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44 ) |
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45 |
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46 |
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47 class ConfigureBasic(log.ConfigureBase): |
1942 | 48 def configureColors(self, colors, force_colors, levels_taints_dict): |
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49 super(ConfigureBasic, self).configureColors( |
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50 colors, force_colors, levels_taints_dict |
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51 ) |
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52 if colors: |
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53 import sys |
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54 |
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55 try: |
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56 isatty = sys.stdout.isatty() |
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57 except AttributeError: |
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58 isatty = False |
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59 if ( |
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60 force_colors or isatty |
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61 ): # FIXME: isatty should be tested on each handler, not globaly |
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62 # we need colors |
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63 log.Logger.post_treat = lambda logger, level, message: self.ansiColors( |
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64 level, message |
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65 ) |
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66 elif force_colors: |
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67 raise ValueError("force_colors can't be used if colors is False") |
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68 |
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69 @staticmethod |
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70 def getProfile(): |
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71 """Try to find profile value using introspection""" |
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72 import inspect |
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73 |
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74 stack = inspect.stack() |
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75 current_path = stack[0][1] |
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76 for frame_data in stack[:-1]: |
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77 if frame_data[1] != current_path: |
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78 if ( |
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79 log.backend == C.LOG_BACKEND_STANDARD |
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80 and "/logging/__init__.py" in frame_data[1] |
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81 ): |
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82 continue |
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83 break |
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84 |
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85 frame = frame_data[0] |
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86 args = inspect.getargvalues(frame) |
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87 try: |
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88 profile = args.locals.get("profile") or args.locals["profile_key"] |
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89 except (TypeError, KeyError): |
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90 try: |
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91 try: |
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92 profile = args.locals["self"].profile |
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93 except AttributeError: |
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94 try: |
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95 profile = args.locals["self"].parent.profile |
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96 except AttributeError: |
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97 profile = args.locals[ |
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98 "self" |
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99 ].host.profile # used in quick_frontend for single profile configuration |
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100 except Exception: |
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101 # we can't find profile, we return an empty value |
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102 profile = "" |
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103 return profile |
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104 |
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105 |
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106 class ConfigureTwisted(ConfigureBasic): |
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107 LOGGER_CLASS = TwistedLogger |
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108 |
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109 def changeObserver(self, observer, can_colors=False): |
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110 """Install a hook on observer to manage SàT specificities |
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111 |
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112 @param observer: original observer to hook |
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113 @param can_colors: True if observer can display ansi colors |
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114 """ |
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115 |
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116 def observer_hook(event): |
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117 """redirect non SàT log to twisted_logger, and add colors when possible""" |
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118 if ( |
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119 "sat_logged" in event |
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120 ): # we only want our own logs, other are managed by twistedObserver |
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121 # we add colors if possible |
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122 if ( |
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123 can_colors and self.LOGGER_CLASS.colors |
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124 ) or self.LOGGER_CLASS.force_colors: |
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125 message = event.get("message", tuple()) |
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126 level = event.get("level", C.LOG_LVL_INFO) |
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127 if message: |
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128 event["message"] = ( |
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129 self.ansiColors(level, "".join(message)), |
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130 ) # must be a tuple |
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131 observer(event) # we can now call the original observer |
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132 |
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133 return observer_hook |
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134 |
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135 def changeFileLogObserver(self, observer): |
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136 """Install SàT hook for FileLogObserver |
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137 |
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138 if the output is a tty, we allow colors, else we don't |
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139 @param observer: original observer to hook |
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140 """ |
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141 log_obs = observer.__self__ |
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142 log_file = log_obs.write.__self__ |
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143 try: |
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144 can_colors = log_file.isatty() |
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145 except AttributeError: |
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146 can_colors = False |
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147 return self.changeObserver(observer, can_colors=can_colors) |
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148 |
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149 def installObserverHook(self, observer): |
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150 """Check observer type and install SàT hook when possible |
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152 @param observer: observer to hook |
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153 @return: hooked observer or original one |
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154 """ |
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155 if hasattr(observer, "__self__"): |
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156 ori = observer |
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157 if isinstance(observer.__self__, self.twisted_log.FileLogObserver): |
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158 observer = self.changeFileLogObserver(observer) |
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159 elif isinstance(observer.__self__, self.twisted_log.DefaultObserver): |
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160 observer = self.changeObserver(observer, can_colors=True) |
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161 else: |
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162 # we use print because log system is not fully initialized |
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163 print("Unmanaged observer [%s]" % observer) |
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164 return observer |
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165 self.observers[ori] = observer |
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166 return observer |
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168 def preTreatment(self): |
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169 """initialise needed attributes, and install observers hooks""" |
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170 self.observers = {} |
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171 from twisted.python import log as twisted_log |
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172 |
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173 self.twisted_log = twisted_log |
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174 self.log_publisher = twisted_log.msg.__self__ |
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175 |
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176 def addObserverObserver(self_logpub, other): |
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177 """Install hook so we know when a new observer is added""" |
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178 other = self.installObserverHook(other) |
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179 return self_logpub._originalAddObserver(other) |
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180 |
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181 def removeObserverObserver(self_logpub, ori): |
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182 """removeObserver hook fix |
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183 |
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184 As we wrap the original observer, the original removeObserver may want to remove the original object instead of the wrapper, this method fix this |
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185 """ |
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186 if ori in self.observers: |
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187 self_logpub._originalRemoveObserver(self.observers[ori]) |
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188 else: |
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189 try: |
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190 self_logpub._originalRemoveObserver(ori) |
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191 except ValueError: |
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192 try: |
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193 ori in self.cleared_observers |
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194 except AttributeError: |
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195 raise ValueError("Unknown observer") |
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196 |
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197 # we replace addObserver/removeObserver by our own |
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198 twisted_log.LogPublisher._originalAddObserver = ( |
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199 twisted_log.LogPublisher.addObserver |
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200 ) |
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201 twisted_log.LogPublisher._originalRemoveObserver = ( |
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202 twisted_log.LogPublisher.removeObserver |
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203 ) |
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204 import types # see https://stackoverflow.com/a/4267590 (thx Chris Morgan/aaronasterling) |
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205 |
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206 twisted_log.addObserver = types.MethodType( |
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207 addObserverObserver, self.log_publisher, twisted_log.LogPublisher |
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208 ) |
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209 twisted_log.removeObserver = types.MethodType( |
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210 removeObserverObserver, self.log_publisher, twisted_log.LogPublisher |
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211 ) |
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212 |
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213 # we now change existing observers |
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214 for idx, observer in enumerate(self.log_publisher.observers): |
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215 self.log_publisher.observers[idx] = self.installObserverHook(observer) |
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216 |
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217 def configureLevel(self, level): |
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218 self.LOGGER_CLASS.level = level |
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219 super(ConfigureTwisted, self).configureLevel(level) |
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220 |
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221 def configureOutput(self, output): |
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222 import sys |
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223 |
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224 if output is None: |
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225 output = C.LOG_OPT_OUTPUT_SEP + C.LOG_OPT_OUTPUT_DEFAULT |
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226 self.manageOutputs(output) |
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227 addObserver = self.twisted_log.addObserver |
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228 |
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229 if C.LOG_OPT_OUTPUT_DEFAULT in log.handlers: |
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230 # default output is already managed, we just add output to stdout if we are in debug or nodaemon mode |
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231 if self.backend_data is None: |
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232 raise ValueError( |
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233 "You must pass options as backend_data with Twisted backend" |
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234 ) |
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235 options = self.backend_data |
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236 if options.get("nodaemon", False) or options.get("debug", False): |
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237 addObserver(self.twisted_log.FileLogObserver(sys.stdout).emit) |
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238 else: |
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239 # \\default is not in the output, so we remove current observers |
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240 self.cleared_observers = self.log_publisher.observers |
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241 self.observers.clear() |
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242 del self.log_publisher.observers[:] |
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243 # and we forbid twistd to add any observer |
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244 self.twisted_log.addObserver = lambda other: None |
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245 |
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246 if C.LOG_OPT_OUTPUT_FILE in log.handlers: |
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247 from twisted.python import logfile |
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248 |
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249 for path in log.handlers[C.LOG_OPT_OUTPUT_FILE]: |
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250 log_file = ( |
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251 sys.stdout if path == "-" else logfile.LogFile.fromFullPath(path) |
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252 ) |
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253 addObserver(self.twisted_log.FileLogObserver(log_file).emit) |
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254 |
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255 if C.LOG_OPT_OUTPUT_MEMORY in log.handlers: |
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256 raise NotImplementedError( |
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257 "Memory observer is not implemented in Twisted backend" |
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258 ) |
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259 |
1942 | 260 def configureColors(self, colors, force_colors, levels_taints_dict): |
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261 super(ConfigureTwisted, self).configureColors( |
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262 colors, force_colors, levels_taints_dict |
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263 ) |
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264 self.LOGGER_CLASS.colors = colors |
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265 self.LOGGER_CLASS.force_colors = force_colors |
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266 if force_colors and not colors: |
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267 raise ValueError("colors must be True if force_colors is True") |
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268 |
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269 def postTreatment(self): |
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270 """Install twistedObserver which manage non SàT logs""" |
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271 |
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272 def twistedObserver(event): |
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273 """Observer which redirect log message not produced by SàT to SàT logging system""" |
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274 if not "sat_logged" in event: |
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275 # this log was not produced by SàT |
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276 from twisted.python import log as twisted_log |
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277 |
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278 text = twisted_log.textFromEventDict(event) |
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279 if text is None: |
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280 return |
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281 twisted_logger = log.getLogger(C.LOG_TWISTED_LOGGER) |
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282 log_method = ( |
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283 twisted_logger.error |
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284 if event.get("isError", False) |
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285 else twisted_logger.info |
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286 ) |
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287 log_method(text.decode("utf-8")) |
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288 |
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289 self.log_publisher._originalAddObserver(twistedObserver) |
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290 |
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291 |
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292 class ConfigureStandard(ConfigureBasic): |
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293 def __init__( |
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294 self, |
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295 level=None, |
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296 fmt=None, |
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297 output=None, |
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298 logger=None, |
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299 colors=False, |
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300 levels_taints_dict=None, |
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301 force_colors=False, |
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302 backend_data=None, |
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303 ): |
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304 if fmt is None: |
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305 fmt = C.LOG_OPT_FORMAT[1] |
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306 if output is None: |
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307 output = C.LOG_OPT_OUTPUT[1] |
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308 super(ConfigureStandard, self).__init__( |
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309 level, |
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310 fmt, |
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311 output, |
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312 logger, |
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313 colors, |
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314 levels_taints_dict, |
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315 force_colors, |
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316 backend_data, |
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317 ) |
991 | 318 |
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319 def preTreatment(self): |
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320 """We use logging methods directly, instead of using Logger""" |
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321 import logging |
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322 |
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323 log.getLogger = logging.getLogger |
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324 log.debug = logging.debug |
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325 log.info = logging.info |
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326 log.warning = logging.warning |
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327 log.error = logging.error |
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328 log.critical = logging.critical |
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329 |
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330 def configureLevel(self, level): |
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331 if level is None: |
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332 level = C.LOG_LVL_DEBUG |
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333 self.level = level |
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334 |
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335 def configureFormat(self, fmt): |
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336 super(ConfigureStandard, self).configureFormat(fmt) |
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337 import logging |
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338 import sys |
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339 |
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340 class SatFormatter(logging.Formatter): |
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341 u"""Formatter which manage SàT specificities""" |
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342 _format = fmt |
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343 _with_profile = "%(profile)s" in fmt |
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344 |
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345 def __init__(self, can_colors=False): |
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346 super(SatFormatter, self).__init__(self._format) |
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347 self.can_colors = can_colors |
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348 |
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349 def format(self, record): |
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350 if self._with_profile: |
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351 record.profile = ConfigureStandard.getProfile() |
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352 do_color = self.with_colors and (self.can_colors or self.force_colors) |
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353 if ConfigureStandard._color_location: |
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354 # we copy raw formatting strings for color_* |
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355 # as formatting is handled in ansiColors in this case |
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356 if do_color: |
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357 record.color_start = log.COLOR_START |
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358 record.color_end = log.COLOR_END |
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359 else: |
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360 record.color_start = record.color_end = "" |
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361 s = super(SatFormatter, self).format(record) |
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362 if do_color: |
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363 s = ConfigureStandard.ansiColors(record.levelname, s) |
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364 if sys.platform == "android": |
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365 # FIXME: dirty hack to workaround android encoding issue on log |
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366 # need to be fixed properly |
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367 return s.encode("ascii", "ignore") |
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368 else: |
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369 return s |
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370 |
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371 self.formatterClass = SatFormatter |
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372 |
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373 def configureOutput(self, output): |
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374 self.manageOutputs(output) |
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375 |
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376 def configureLogger(self, logger): |
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377 self.name_filter = log.FilterName(logger) if logger else None |
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378 |
1942 | 379 def configureColors(self, colors, force_colors, levels_taints_dict): |
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380 super(ConfigureStandard, self).configureColors( |
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381 colors, force_colors, levels_taints_dict |
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382 ) |
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383 self.formatterClass.with_colors = colors |
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384 self.formatterClass.force_colors = force_colors |
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385 if not colors and force_colors: |
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386 raise ValueError("force_colors can't be used if colors is False") |
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387 |
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388 def _addHandler(self, root_logger, hdlr, can_colors=False): |
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389 hdlr.setFormatter(self.formatterClass(can_colors)) |
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390 root_logger.addHandler(hdlr) |
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391 root_logger.setLevel(self.level) |
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392 if self.name_filter is not None: |
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393 hdlr.addFilter(self.name_filter) |
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394 |
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395 def postTreatment(self): |
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396 import logging |
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397 |
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398 root_logger = logging.getLogger() |
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399 if len(root_logger.handlers) == 0: |
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400 for handler, options in log.handlers.items(): |
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401 if handler == C.LOG_OPT_OUTPUT_DEFAULT: |
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402 hdlr = logging.StreamHandler() |
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403 try: |
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404 can_colors = hdlr.stream.isatty() |
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405 except AttributeError: |
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406 can_colors = False |
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407 self._addHandler(root_logger, hdlr, can_colors=can_colors) |
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408 elif handler == C.LOG_OPT_OUTPUT_MEMORY: |
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409 from logging.handlers import BufferingHandler |
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410 |
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411 class SatMemoryHandler(BufferingHandler): |
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412 def emit(self, record): |
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413 super(SatMemoryHandler, self).emit(self.format(record)) |
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414 |
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415 hdlr = SatMemoryHandler(options) |
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416 log.handlers[ |
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417 handler |
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418 ] = ( |
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419 hdlr |
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420 ) # we keep a reference to the handler to read the buffer later |
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421 self._addHandler(root_logger, hdlr, can_colors=False) |
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422 elif handler == C.LOG_OPT_OUTPUT_FILE: |
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423 import os.path |
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424 |
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425 for path in options: |
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426 hdlr = logging.FileHandler(os.path.expanduser(path)) |
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427 self._addHandler(root_logger, hdlr, can_colors=False) |
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428 else: |
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429 raise ValueError("Unknown handler type") |
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430 else: |
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431 root_logger.warning(u"Handlers already set on root logger") |
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432 |
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433 @staticmethod |
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434 def memoryGet(size=None): |
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435 """Return buffered logs |
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436 |
1021
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437 @param size: number of logs to return |
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438 """ |
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439 mem_handler = log.handlers[C.LOG_OPT_OUTPUT_MEMORY] |
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440 return ( |
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441 log_msg for log_msg in mem_handler.buffer[size if size is None else -size :] |
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442 ) |
1021
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|
443 |
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444 |
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445 log.configure_cls[C.LOG_BACKEND_BASIC] = ConfigureBasic |
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446 log.configure_cls[C.LOG_BACKEND_TWISTED] = ConfigureTwisted |
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447 log.configure_cls[C.LOG_BACKEND_STANDARD] = ConfigureStandard |
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448 |
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449 |
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|
450 def configure(backend, **options): |
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451 """Configure logging behaviour |
991 | 452 @param backend: can be: |
453 C.LOG_BACKEND_STANDARD: use standard logging module | |
454 C.LOG_BACKEND_TWISTED: use twisted logging module (with standard logging observer) | |
455 C.LOG_BACKEND_BASIC: use a basic print based logging | |
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456 C.LOG_BACKEND_CUSTOM: use a given Logger subclass |
991 | 457 """ |
1021
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458 return log.configure(backend, **options) |
991 | 459 |
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460 |
994
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461 def _parseOptions(options): |
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462 """Parse string options as given in conf or environment variable, and return expected python value |
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|
463 |
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464 @param options (dict): options with (key: name, value: string value) |
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465 """ |
1005
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|
466 COLORS = C.LOG_OPT_COLORS[0] |
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467 LEVEL = C.LOG_OPT_LEVEL[0] |
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|
468 |
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|
469 if COLORS in options: |
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470 if options[COLORS].lower() in ("1", "true"): |
1005
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471 options[COLORS] = True |
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472 elif options[COLORS] == "force": |
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473 options[COLORS] = True |
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474 options["force_colors"] = True |
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475 else: |
1005
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476 options[COLORS] = False |
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|
477 if LEVEL in options: |
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|
478 level = options[LEVEL].upper() |
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|
479 if level not in C.LOG_LEVELS: |
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480 level = C.LOG_LVL_INFO |
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481 options[LEVEL] = level |
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482 |
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483 |
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484 def satConfigure(backend=C.LOG_BACKEND_STANDARD, const=None, backend_data=None): |
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485 """Configure logging system for SàT, can be used by frontends |
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486 |
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487 logs conf is read in SàT conf, then in environment variables. It must be done before Memory init |
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488 @param backend: backend to use, it can be: |
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489 - C.LOG_BACKEND_BASIC: print based backend |
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490 - C.LOG_BACKEND_TWISTED: Twisted logging backend |
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491 - C.LOG_BACKEND_STANDARD: standard logging backend |
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492 @param const: Const class to use instead of sat.core.constants.Const (mainly used to change default values) |
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493 """ |
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494 if const is not None: |
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495 global C |
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496 C = const |
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497 log.C = const |
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498 from sat.tools import config |
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499 import os |
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500 |
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501 log_conf = {} |
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502 sat_conf = config.parseMainConf() |
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503 for opt_name, opt_default in C.LOG_OPTIONS(): |
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504 try: |
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505 log_conf[opt_name] = os.environ[ |
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506 "".join((C.ENV_PREFIX, C.LOG_OPT_PREFIX.upper(), opt_name.upper())) |
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507 ] |
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508 except KeyError: |
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509 log_conf[opt_name] = config.getConfig( |
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510 sat_conf, C.LOG_OPT_SECTION, C.LOG_OPT_PREFIX + opt_name, opt_default |
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511 ) |
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512 |
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513 _parseOptions(log_conf) |
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514 configure(backend, backend_data=backend_data, **log_conf) |