gecko/toolkit/mozapps/extensions/AddonLogging.jsm

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/*
# ***** BEGIN LICENSE BLOCK *****
# Version: MPL 1.1/GPL 2.0/LGPL 2.1
#
# The contents of this file are subject to the Mozilla Public License Version
# 1.1 (the "License"); you may not use this file except in compliance with
# the License. You may obtain a copy of the License at
# http://www.mozilla.org/MPL/
#
# Software distributed under the License is distributed on an "AS IS" basis,
# WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
# for the specific language governing rights and limitations under the
# License.
#
# The Original Code is the Extension Manager.
#
# The Initial Developer of the Original Code is
# the Mozilla Foundation.
# Portions created by the Initial Developer are Copyright (C) 2010
# the Initial Developer. All Rights Reserved.
#
# Contributor(s):
# Dave Townsend <dtownsend@oxymoronical.com>
#
# Alternatively, the contents of this file may be used under the terms of
# either the GNU General Public License Version 2 or later (the "GPL"), or
# the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
# in which case the provisions of the GPL or the LGPL are applicable instead
# of those above. If you wish to allow use of your version of this file only
# under the terms of either the GPL or the LGPL, and not to allow others to
# use your version of this file under the terms of the MPL, indicate your
# decision by deleting the provisions above and replace them with the notice
# and other provisions required by the GPL or the LGPL. If you do not delete
# the provisions above, a recipient may use your version of this file under
# the terms of any one of the MPL, the GPL or the LGPL.
#
# ***** END LICENSE BLOCK *****
*/
"use strict";
const Cc = Components.classes;
const Ci = Components.interfaces;
const Cr = Components.results;
const KEY_PROFILEDIR = "ProfD";
const FILE_EXTENSIONS_LOG = "extensions.log";
const PREF_LOGGING_ENABLED = "extensions.logging.enabled";
const LOGGER_FILE_PERM = parseInt("666", 8);
const NS_PREFBRANCH_PREFCHANGE_TOPIC_ID = "nsPref:changed";
Components.utils.import("resource://gre/modules/FileUtils.jsm");
Components.utils.import("resource://gre/modules/Services.jsm");
var EXPORTED_SYMBOLS = [ "LogManager" ];
var gDebugLogEnabled = false;
function formatLogMessage(aType, aName, aStr, aException) {
let message = aType.toUpperCase() + " " + aName + ": " + aStr;
if (aException)
return message + ": " + aException;
return message;
}
function getStackDetails(aException) {
// Defensively wrap all this to ensure that failing to get the message source
// doesn't stop the message from being logged
try {
if (aException) {
if (aException instanceof Ci.nsIException) {
return {
sourceName: aException.filename,
lineNumber: aException.lineNumber
};
}
return {
sourceName: aException.fileName,
lineNumber: aException.lineNumber
};
}
let stackFrame = Components.stack.caller.caller.caller;
return {
sourceName: stackFrame.filename,
lineNumber: stackFrame.lineNumber
};
}
catch (e) {
return {
sourceName: null,
lineNumber: 0
};
}
}
function AddonLogger(aName) {
this.name = aName;
}
AddonLogger.prototype = {
name: null,
error: function(aStr, aException) {
let message = formatLogMessage("error", this.name, aStr, aException);
let stack = getStackDetails(aException);
let consoleMessage = Cc["@mozilla.org/scripterror;1"].
createInstance(Ci.nsIScriptError);
consoleMessage.init(message, stack.sourceName, null, stack.lineNumber, 0,
Ci.nsIScriptError.errorFlag, "component javascript");
Services.console.logMessage(consoleMessage);
if (gDebugLogEnabled)
dump("*** " + message + "\n");
try {
var tstamp = new Date();
var logfile = FileUtils.getFile(KEY_PROFILEDIR, [FILE_EXTENSIONS_LOG]);
var stream = Cc["@mozilla.org/network/file-output-stream;1"].
createInstance(Ci.nsIFileOutputStream);
stream.init(logfile, 0x02 | 0x08 | 0x10, LOGGER_FILE_PERM, 0); // write, create, append
var writer = Cc["@mozilla.org/intl/converter-output-stream;1"].
createInstance(Ci.nsIConverterOutputStream);
writer.init(stream, "UTF-8", 0, 0x0000);
writer.writeString(tstamp.toLocaleFormat("%Y-%m-%d %H:%M:%S ") +
message + " at " + stack.sourceName + ":" +
stack.lineNumber + "\n");
writer.close();
}
catch (e) { }
},
warn: function(aStr, aException) {
let message = formatLogMessage("warn", this.name, aStr, aException);
let stack = getStackDetails(aException);
let consoleMessage = Cc["@mozilla.org/scripterror;1"].
createInstance(Ci.nsIScriptError);
consoleMessage.init(message, stack.sourceName, null, stack.lineNumber, 0,
Ci.nsIScriptError.warningFlag, "component javascript");
Services.console.logMessage(consoleMessage);
if (gDebugLogEnabled)
dump("*** " + message + "\n");
},
log: function(aStr, aException) {
if (gDebugLogEnabled) {
let message = formatLogMessage("log", this.name, aStr, aException);
dump("*** " + message + "\n");
Services.console.logStringMessage(message);
}
}
};
var LogManager = {
getLogger: function(aName, aTarget) {
let logger = new AddonLogger(aName);
if (aTarget) {
["error", "warn", "log"].forEach(function(name) {
let fname = name.toUpperCase();
delete aTarget[fname];
aTarget[fname] = function(aStr, aException) {
logger[name](aStr, aException);
};
});
}
return logger;
}
};
var PrefObserver = {
init: function() {
Services.prefs.addObserver(PREF_LOGGING_ENABLED, this, false);
Services.obs.addObserver(this, "xpcom-shutdown", false);
this.observe(null, NS_PREFBRANCH_PREFCHANGE_TOPIC_ID, PREF_LOGGING_ENABLED);
},
observe: function(aSubject, aTopic, aData) {
if (aTopic == "xpcom-shutdown") {
Services.prefs.removeObserver(PREF_LOGGING_ENABLED, this);
Services.obs.removeObserver(this, "xpcom-shutdown");
}
else if (aTopic == NS_PREFBRANCH_PREFCHANGE_TOPIC_ID) {
try {
gDebugLogEnabled = Services.prefs.getBoolPref(PREF_LOGGING_ENABLED);
}
catch (e) {
gDebugLogEnabled = false;
}
}
}
};
PrefObserver.init();