added a log handler in utils.py

1 files changed, 86 insertions, 0 deletions

diff --git a/utils.py b/utils.py
new file mode 100644
index 0000000..351d469
--- /dev/null
+++ b/utils.py
@@ -0,0 +1,86 @@
+import logging
+import traceback
+
+from django.conf import settings
+from django.core import mail
+from django.views.debug import ExceptionReporter, get_exception_reporter_filter
+
+LOG_FILE = 'hk.log'
+
+def log(level, *args, **kwargs):
+    """Small wrapper around logger functions."""
+    {
+     'debug': logger.debug,
+     'error': logger.error,
+     'exception': logger.exception,
+     'warn': logger.warn
+    }[level](*args, **kwargs)
+
+
+class HyperKittyLogHandler(logging.Handler):
+    """A custom HyperKitty log handler.
+
+    If the request is passed as the first argument to the log record,
+    request data will be provided in the email report.
+    """
+
+    def __init__(self, log_to_file=True, email_admins=True):
+        logging.Handler.__init__(self)
+        self.log_to_file = log_to_file
+	self.email_admins = email_admins
+
+    def emit(self, record):
+        try:
+            request = record.request
+            subject = '%s (%s IP): %s' % (
+                record.levelname,
+                (request.META.get('REMOTE_ADDR') in settings.INTERNAL_IPS
+                 and 'internal' or 'EXTERNAL'),
+                record.getMessage()
+            )
+            filter = get_exception_reporter_filter(request)
+            request_repr = filter.get_request_repr(request)
+        except Exception:
+            subject = '%s: %s' % (
+                record.levelname,
+                record.getMessage()
+            )
+            request = None
+            request_repr = "Request repr() unavailable."
+        subject = self.format_subject(subject)
+
+        if record.exc_info:
+            exc_info = record.exc_info
+            stack_trace = '\n'.join(traceback.format_exception(*record.exc_info))
+        else:
+            exc_info = (None, record.getMessage(), None)
+            stack_trace = 'No stack trace available'
+
+        message = "%s\n\n%s" % (stack_trace, request_repr)
+        reporter = ExceptionReporter(request, is_email=True, *exc_info)
+        html_message = reporter.get_traceback_html()
+
+	if self.email_admins:
+		mail.mail_admins(subject, message, fail_silently=True, html_message=html_message)	
+
+	if self.log_to_file:
+		log_file = open(LOG_FILE, 'a')
+		log_file.write(message)
+		log_file.close()
+
+    def format_subject(self, subject):
+        """
+        Escape CR and LF characters, and limit length.
+        RFC 2822's hard limit is 998 characters per line. So, minus "Subject: "
+        the actual subject must be no longer than 989 characters.
+        """
+        formatted_subject = subject.replace('\n', '\\n').replace('\r', '\\r')
+        return formatted_subject[:989]
+
+
+logger = None
+if not logger:
+    logger = logging.getLogger('HyperKitty')
+
+if not logger.handlers:
+    logger.addHandler(HyperKittyLogHandler(True, True))