fix character encoding problem with localized datetime in log

wakatime/log.py

@@ -38,15 +38,18 @@ class CustomEncoder(json.JSONEncoder):
 class JsonFormatter(logging.Formatter):
 
     def setup(self, timestamp, isWrite, targetFile, version, plugin):
+        encoding = sys.getfilesystemencoding()
+
         self.timestamp = timestamp
         self.isWrite = isWrite
-        self.targetFile = targetFile
+        self.targetFile = targetFile.decode(encoding, 'ignore')
         self.version = version
         self.plugin = plugin
 
     def format(self, record):
+        now = self.formatTime(record, self.datefmt).decode('utf-8', 'ignore')
         data = OrderedDict([
-            ('now', self.formatTime(record, self.datefmt)),
+            ('now', now),
             ('version', self.version),
             ('plugin', self.plugin),
             ('time', self.timestamp),
@@ -76,7 +79,7 @@ def setup_logging(args, version):
     logger = logging.getLogger()
     set_log_level(logger, args)
     if len(logger.handlers) > 0:
-        formatter = JsonFormatter(datefmt='%a %b %d %H:%M:%S %Z %Y')
+        formatter = JsonFormatter(datefmt='%Y/%m/%d %H:%M:%S %z')
         formatter.setup(
             timestamp=args.timestamp,
             isWrite=args.isWrite,
@@ -90,7 +93,7 @@ def setup_logging(args, version):
     if not logfile:
         logfile = '~/.wakatime.log'
     handler = logging.FileHandler(os.path.expanduser(logfile))
-    formatter = JsonFormatter(datefmt='%a %b %d %H:%M:%S %Z %Y')
+    formatter = JsonFormatter(datefmt='%Y/%m/%d %H:%M:%S %z')
     formatter.setup(
         timestamp=args.timestamp,
         isWrite=args.isWrite,