Mercurial > libervia-backend
annotate sat/core/log_config.py @ 3029:457ae6381e2a
doc: replaced deprecated installation link in INSTALL
| author | Goffi <goffi@goffi.org> |
|---|---|
| date | Wed, 14 Aug 2019 08:08:25 +0200 |
| parents | ab2696e34d29 |
| children | 49c7bc3afb2b |
| rev | line source |
|---|---|
| 3028 | 1 #!/usr/bin/env python3 |
| 991 | 2 # -*- coding: utf-8 -*- |
| 3 | |
| 4 # SàT: a XMPP client | |
| 2771 | 5 # Copyright (C) 2009-2019 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, **kwargs): |
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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 if kwargs.get('exc_info', False): |
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43 message = self.addTraceback(message) |
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44 self.twisted_log.msg( |
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45 message.encode("utf-8", "ignore"), sat_logged=True, level=level |
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46 ) |
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47 |
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48 |
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49 class ConfigureBasic(log.ConfigureBase): |
| 1942 | 50 def configureColors(self, colors, force_colors, levels_taints_dict): |
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51 super(ConfigureBasic, self).configureColors( |
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52 colors, force_colors, levels_taints_dict |
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53 ) |
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54 if colors: |
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55 import sys |
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56 |
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57 try: |
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58 isatty = sys.stdout.isatty() |
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59 except AttributeError: |
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60 isatty = False |
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61 # FIXME: isatty should be tested on each handler, not globaly |
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62 if (force_colors or isatty): |
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63 # we need colors |
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64 log.Logger.post_treat = lambda logger, level, message: self.ansiColors( |
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65 level, message |
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66 ) |
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67 elif force_colors: |
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68 raise ValueError("force_colors can't be used if colors is False") |
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69 |
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70 @staticmethod |
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71 def getProfile(): |
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72 """Try to find profile value using introspection""" |
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73 import inspect |
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74 |
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75 stack = inspect.stack() |
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76 current_path = stack[0][1] |
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77 for frame_data in stack[:-1]: |
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78 if frame_data[1] != current_path: |
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79 if ( |
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80 log.backend == C.LOG_BACKEND_STANDARD |
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81 and "/logging/__init__.py" in frame_data[1] |
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82 ): |
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83 continue |
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84 break |
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85 |
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86 frame = frame_data[0] |
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87 args = inspect.getargvalues(frame) |
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88 try: |
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89 profile = args.locals.get("profile") or args.locals["profile_key"] |
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90 except (TypeError, KeyError): |
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91 try: |
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92 try: |
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93 profile = args.locals["self"].profile |
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94 except AttributeError: |
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95 try: |
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96 profile = args.locals["self"].parent.profile |
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97 except AttributeError: |
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98 profile = args.locals[ |
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99 "self" |
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100 ].host.profile # used in quick_frontend for single profile configuration |
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101 except Exception: |
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102 # we can't find profile, we return an empty value |
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103 profile = "" |
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104 return profile |
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105 |
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106 |
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107 class ConfigureTwisted(ConfigureBasic): |
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108 LOGGER_CLASS = TwistedLogger |
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109 |
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110 def changeObserver(self, observer, can_colors=False): |
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111 """Install a hook on observer to manage SàT specificities |
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112 |
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113 @param observer: original observer to hook |
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114 @param can_colors: True if observer can display ansi colors |
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115 """ |
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116 |
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117 def observer_hook(event): |
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118 """redirect non SàT log to twisted_logger, and add colors when possible""" |
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119 if ( |
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120 "sat_logged" in event |
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121 ): # we only want our own logs, other are managed by twistedObserver |
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122 # we add colors if possible |
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123 if ( |
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124 can_colors and self.LOGGER_CLASS.colors |
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125 ) or self.LOGGER_CLASS.force_colors: |
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126 message = event.get("message", tuple()) |
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127 if message: |
| 3028 | 128 event["message"] = (b"".join(message),) # must be a tuple |
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129 observer(event) # we can now call the original observer |
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130 |
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131 return observer_hook |
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132 |
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133 def changeFileLogObserver(self, observer): |
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134 """Install SàT hook for FileLogObserver |
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135 |
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136 if the output is a tty, we allow colors, else we don't |
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137 @param observer: original observer to hook |
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138 """ |
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139 log_obs = observer.__self__ |
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140 log_file = log_obs.write.__self__ |
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141 try: |
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142 can_colors = log_file.isatty() |
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143 except AttributeError: |
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144 can_colors = False |
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145 return self.changeObserver(observer, can_colors=can_colors) |
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146 |
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147 def installObserverHook(self, observer): |
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148 """Check observer type and install SàT hook when possible |
| 991 | 149 |
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150 @param observer: observer to hook |
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151 @return: hooked observer or original one |
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152 """ |
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153 if hasattr(observer, "__self__"): |
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154 ori = observer |
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155 if isinstance(observer.__self__, self.twisted_log.FileLogObserver): |
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156 observer = self.changeFileLogObserver(observer) |
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157 elif isinstance(observer.__self__, self.twisted_log.DefaultObserver): |
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158 observer = self.changeObserver(observer, can_colors=True) |
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159 else: |
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160 # we use print because log system is not fully initialized |
| 3028 | 161 print(("Unmanaged observer [%s]" % observer)) |
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162 return observer |
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163 self.observers[ori] = observer |
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164 return observer |
| 991 | 165 |
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166 def preTreatment(self): |
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167 """initialise needed attributes, and install observers hooks""" |
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168 self.observers = {} |
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169 from twisted.python import log as twisted_log |
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170 |
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171 self.twisted_log = twisted_log |
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172 self.log_publisher = twisted_log.msg.__self__ |
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173 |
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174 def addObserverObserver(self_logpub, other): |
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175 """Install hook so we know when a new observer is added""" |
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176 other = self.installObserverHook(other) |
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177 return self_logpub._originalAddObserver(other) |
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178 |
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179 def removeObserverObserver(self_logpub, ori): |
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180 """removeObserver hook fix |
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181 |
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182 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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183 """ |
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184 if ori in self.observers: |
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185 self_logpub._originalRemoveObserver(self.observers[ori]) |
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186 else: |
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187 try: |
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188 self_logpub._originalRemoveObserver(ori) |
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189 except ValueError: |
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190 try: |
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191 ori in self.cleared_observers |
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192 except AttributeError: |
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193 raise ValueError("Unknown observer") |
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194 |
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195 # we replace addObserver/removeObserver by our own |
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196 twisted_log.LogPublisher._originalAddObserver = ( |
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197 twisted_log.LogPublisher.addObserver |
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198 ) |
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199 twisted_log.LogPublisher._originalRemoveObserver = ( |
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200 twisted_log.LogPublisher.removeObserver |
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201 ) |
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202 import types # see https://stackoverflow.com/a/4267590 (thx Chris Morgan/aaronasterling) |
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203 |
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204 twisted_log.addObserver = types.MethodType( |
| 3028 | 205 addObserverObserver, self.log_publisher |
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206 ) |
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207 twisted_log.removeObserver = types.MethodType( |
| 3028 | 208 removeObserverObserver, self.log_publisher |
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209 ) |
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210 |
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211 # we now change existing observers |
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212 for idx, observer in enumerate(self.log_publisher.observers): |
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213 self.log_publisher.observers[idx] = self.installObserverHook(observer) |
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214 |
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215 def configureLevel(self, level): |
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216 self.LOGGER_CLASS.level = level |
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217 super(ConfigureTwisted, self).configureLevel(level) |
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218 |
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219 def configureOutput(self, output): |
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220 import sys |
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221 |
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222 if output is None: |
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223 output = C.LOG_OPT_OUTPUT_SEP + C.LOG_OPT_OUTPUT_DEFAULT |
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224 self.manageOutputs(output) |
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225 addObserver = self.twisted_log.addObserver |
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226 |
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227 if C.LOG_OPT_OUTPUT_DEFAULT in log.handlers: |
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228 # default output is already managed, we just add output to stdout if we are in debug or nodaemon mode |
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229 if self.backend_data is None: |
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230 raise ValueError( |
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231 "You must pass options as backend_data with Twisted backend" |
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232 ) |
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233 options = self.backend_data |
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234 if options.get("nodaemon", False) or options.get("debug", False): |
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235 addObserver(self.twisted_log.FileLogObserver(sys.stdout).emit) |
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236 else: |
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237 # \\default is not in the output, so we remove current observers |
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238 self.cleared_observers = self.log_publisher.observers |
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239 self.observers.clear() |
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240 del self.log_publisher.observers[:] |
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241 # and we forbid twistd to add any observer |
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242 self.twisted_log.addObserver = lambda other: None |
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243 |
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244 if C.LOG_OPT_OUTPUT_FILE in log.handlers: |
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245 from twisted.python import logfile |
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246 |
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247 for path in log.handlers[C.LOG_OPT_OUTPUT_FILE]: |
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248 log_file = ( |
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249 sys.stdout if path == "-" else logfile.LogFile.fromFullPath(path) |
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250 ) |
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251 addObserver(self.twisted_log.FileLogObserver(log_file).emit) |
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252 |
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253 if C.LOG_OPT_OUTPUT_MEMORY in log.handlers: |
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254 raise NotImplementedError( |
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255 "Memory observer is not implemented in Twisted backend" |
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256 ) |
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257 |
| 1942 | 258 def configureColors(self, colors, force_colors, levels_taints_dict): |
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259 super(ConfigureTwisted, self).configureColors( |
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260 colors, force_colors, levels_taints_dict |
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261 ) |
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262 self.LOGGER_CLASS.colors = colors |
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263 self.LOGGER_CLASS.force_colors = force_colors |
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264 if force_colors and not colors: |
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265 raise ValueError("colors must be True if force_colors is True") |
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266 |
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267 def postTreatment(self): |
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268 """Install twistedObserver which manage non SàT logs""" |
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269 |
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270 def twistedObserver(event): |
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271 """Observer which redirect log message not produced by SàT to SàT logging system""" |
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272 if not "sat_logged" in event: |
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273 # this log was not produced by SàT |
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274 from twisted.python import log as twisted_log |
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275 |
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276 text = twisted_log.textFromEventDict(event) |
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277 if text is None: |
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278 return |
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279 twisted_logger = log.getLogger(C.LOG_TWISTED_LOGGER) |
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280 log_method = ( |
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281 twisted_logger.error |
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282 if event.get("isError", False) |
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283 else twisted_logger.info |
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284 ) |
| 3028 | 285 log_method(text) |
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286 |
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287 self.log_publisher._originalAddObserver(twistedObserver) |
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288 |
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289 |
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290 class ConfigureStandard(ConfigureBasic): |
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291 def __init__( |
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292 self, |
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293 level=None, |
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294 fmt=None, |
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295 output=None, |
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296 logger=None, |
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297 colors=False, |
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298 levels_taints_dict=None, |
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299 force_colors=False, |
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300 backend_data=None, |
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301 ): |
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302 if fmt is None: |
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303 fmt = C.LOG_OPT_FORMAT[1] |
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304 if output is None: |
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305 output = C.LOG_OPT_OUTPUT[1] |
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306 super(ConfigureStandard, self).__init__( |
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307 level, |
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308 fmt, |
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309 output, |
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310 logger, |
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311 colors, |
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312 levels_taints_dict, |
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313 force_colors, |
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314 backend_data, |
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315 ) |
| 991 | 316 |
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317 def preTreatment(self): |
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318 """We use logging methods directly, instead of using Logger""" |
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319 import logging |
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320 |
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321 log.getLogger = logging.getLogger |
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322 log.debug = logging.debug |
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323 log.info = logging.info |
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324 log.warning = logging.warning |
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325 log.error = logging.error |
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326 log.critical = logging.critical |
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327 |
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328 def configureLevel(self, level): |
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329 if level is None: |
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330 level = C.LOG_LVL_DEBUG |
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331 self.level = level |
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332 |
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333 def configureFormat(self, fmt): |
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334 super(ConfigureStandard, self).configureFormat(fmt) |
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335 import logging |
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336 import sys |
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337 |
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338 class SatFormatter(logging.Formatter): |
| 3028 | 339 """Formatter which manage SàT specificities""" |
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340 _format = fmt |
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341 _with_profile = "%(profile)s" in fmt |
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342 |
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343 def __init__(self, can_colors=False): |
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344 super(SatFormatter, self).__init__(self._format) |
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345 self.can_colors = can_colors |
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346 |
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347 def format(self, record): |
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348 if self._with_profile: |
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349 record.profile = ConfigureStandard.getProfile() |
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350 do_color = self.with_colors and (self.can_colors or self.force_colors) |
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351 if ConfigureStandard._color_location: |
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352 # we copy raw formatting strings for color_* |
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353 # as formatting is handled in ansiColors in this case |
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354 if do_color: |
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355 record.color_start = log.COLOR_START |
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356 record.color_end = log.COLOR_END |
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357 else: |
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358 record.color_start = record.color_end = "" |
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359 s = super(SatFormatter, self).format(record) |
|
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360 if do_color: |
|
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361 s = ConfigureStandard.ansiColors(record.levelname, s) |
|
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362 if sys.platform == "android": |
|
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363 # FIXME: dirty hack to workaround android encoding issue on log |
|
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364 # need to be fixed properly |
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365 return s.encode("ascii", "ignore") |
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366 else: |
|
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367 return s |
|
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368 |
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369 self.formatterClass = SatFormatter |
|
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370 |
|
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371 def configureOutput(self, output): |
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372 self.manageOutputs(output) |
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373 |
|
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374 def configureLogger(self, logger): |
|
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375 self.name_filter = log.FilterName(logger) if logger else None |
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376 |
| 1942 | 377 def configureColors(self, colors, force_colors, levels_taints_dict): |
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378 super(ConfigureStandard, self).configureColors( |
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379 colors, force_colors, levels_taints_dict |
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380 ) |
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381 self.formatterClass.with_colors = colors |
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382 self.formatterClass.force_colors = force_colors |
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383 if not colors and force_colors: |
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384 raise ValueError("force_colors can't be used if colors is False") |
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385 |
|
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386 def _addHandler(self, root_logger, hdlr, can_colors=False): |
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387 hdlr.setFormatter(self.formatterClass(can_colors)) |
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388 root_logger.addHandler(hdlr) |
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389 root_logger.setLevel(self.level) |
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390 if self.name_filter is not None: |
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391 hdlr.addFilter(self.name_filter) |
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392 |
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393 def postTreatment(self): |
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394 import logging |
|
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395 |
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396 root_logger = logging.getLogger() |
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397 if len(root_logger.handlers) == 0: |
| 3028 | 398 for handler, options in list(log.handlers.items()): |
|
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399 if handler == C.LOG_OPT_OUTPUT_DEFAULT: |
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400 hdlr = logging.StreamHandler() |
|
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401 try: |
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402 can_colors = hdlr.stream.isatty() |
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403 except AttributeError: |
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404 can_colors = False |
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405 self._addHandler(root_logger, hdlr, can_colors=can_colors) |
|
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406 elif handler == C.LOG_OPT_OUTPUT_MEMORY: |
|
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407 from logging.handlers import BufferingHandler |
|
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408 |
|
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409 class SatMemoryHandler(BufferingHandler): |
|
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410 def emit(self, record): |
|
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411 super(SatMemoryHandler, self).emit(self.format(record)) |
|
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412 |
|
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|
413 hdlr = SatMemoryHandler(options) |
|
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414 log.handlers[ |
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415 handler |
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416 ] = ( |
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417 hdlr |
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418 ) # we keep a reference to the handler to read the buffer later |
|
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419 self._addHandler(root_logger, hdlr, can_colors=False) |
|
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420 elif handler == C.LOG_OPT_OUTPUT_FILE: |
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421 import os.path |
|
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422 |
|
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423 for path in options: |
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424 hdlr = logging.FileHandler(os.path.expanduser(path)) |
|
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425 self._addHandler(root_logger, hdlr, can_colors=False) |
|
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426 else: |
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|
427 raise ValueError("Unknown handler type") |
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428 else: |
| 3028 | 429 root_logger.warning("Handlers already set on root logger") |
|
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|
430 |
|
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|
431 @staticmethod |
|
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432 def memoryGet(size=None): |
|
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|
433 """Return buffered logs |
|
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434 |
|
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|
435 @param size: number of logs to return |
|
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|
436 """ |
|
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437 mem_handler = log.handlers[C.LOG_OPT_OUTPUT_MEMORY] |
|
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438 return ( |
|
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|
439 log_msg for log_msg in mem_handler.buffer[size if size is None else -size :] |
|
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440 ) |
|
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|
441 |
|
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|
442 |
|
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|
443 log.configure_cls[C.LOG_BACKEND_BASIC] = ConfigureBasic |
|
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|
444 log.configure_cls[C.LOG_BACKEND_TWISTED] = ConfigureTwisted |
|
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|
445 log.configure_cls[C.LOG_BACKEND_STANDARD] = ConfigureStandard |
|
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|
446 |
|
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447 |
|
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|
448 def configure(backend, **options): |
|
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|
449 """Configure logging behaviour |
| 991 | 450 @param backend: can be: |
| 451 C.LOG_BACKEND_STANDARD: use standard logging module | |
| 452 C.LOG_BACKEND_TWISTED: use twisted logging module (with standard logging observer) | |
| 453 C.LOG_BACKEND_BASIC: use a basic print based logging | |
|
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|
454 C.LOG_BACKEND_CUSTOM: use a given Logger subclass |
| 991 | 455 """ |
|
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456 return log.configure(backend, **options) |
| 991 | 457 |
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458 |
|
994
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459 def _parseOptions(options): |
|
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460 """Parse string options as given in conf or environment variable, and return expected python value |
|
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461 |
|
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462 @param options (dict): options with (key: name, value: string value) |
|
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463 """ |
|
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|
464 COLORS = C.LOG_OPT_COLORS[0] |
|
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465 LEVEL = C.LOG_OPT_LEVEL[0] |
|
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|
466 |
|
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467 if COLORS in options: |
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468 if options[COLORS].lower() in ("1", "true"): |
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469 options[COLORS] = True |
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470 elif options[COLORS] == "force": |
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471 options[COLORS] = True |
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472 options["force_colors"] = True |
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473 else: |
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474 options[COLORS] = False |
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475 if LEVEL in options: |
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476 level = options[LEVEL].upper() |
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477 if level not in C.LOG_LEVELS: |
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478 level = C.LOG_LVL_INFO |
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479 options[LEVEL] = level |
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480 |
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481 |
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482 def satConfigure(backend=C.LOG_BACKEND_STANDARD, const=None, backend_data=None): |
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483 """Configure logging system for SàT, can be used by frontends |
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484 |
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485 logs conf is read in SàT conf, then in environment variables. It must be done before Memory init |
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486 @param backend: backend to use, it can be: |
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487 - C.LOG_BACKEND_BASIC: print based backend |
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488 - C.LOG_BACKEND_TWISTED: Twisted logging backend |
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489 - C.LOG_BACKEND_STANDARD: standard logging backend |
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490 @param const: Const class to use instead of sat.core.constants.Const (mainly used to change default values) |
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491 """ |
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492 if const is not None: |
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493 global C |
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494 C = const |
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495 log.C = const |
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496 from sat.tools import config |
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497 import os |
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498 |
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499 log_conf = {} |
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500 sat_conf = config.parseMainConf() |
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501 for opt_name, opt_default in C.LOG_OPTIONS(): |
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502 try: |
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503 log_conf[opt_name] = os.environ[ |
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504 "".join((C.ENV_PREFIX, C.LOG_OPT_PREFIX.upper(), opt_name.upper())) |
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505 ] |
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506 except KeyError: |
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507 log_conf[opt_name] = config.getConfig( |
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508 sat_conf, C.LOG_OPT_SECTION, C.LOG_OPT_PREFIX + opt_name, opt_default |
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509 ) |
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510 |
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511 _parseOptions(log_conf) |
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512 configure(backend, backend_data=backend_data, **log_conf) |