log backend errors into db

pandora/app/config.py

@@ -1,4 +1,3 @@
-
 # -*- coding: utf-8 -*-
 # vi:si:et:sw=4:sts=4:ts=4
 from __future__ import division, with_statement

pandora/app/log.py

@@ -0,0 +1,63 @@
+# -*- coding: utf-8 -*-
+# vi:si:et:sw=4:sts=4:ts=4
+from __future__ import division, with_statement
+
+import logging
+import sys
+
+
+class ErrorHandler(logging.Handler):
+    def __init__(self):
+        logging.Handler.__init__(self)        
+
+    """An exception log handler that log entries into log database.
+
+    If the request is passed as the first argument to the log record,
+    request data will be provided in the
+    """
+    def emit(self, record):
+        import traceback
+        from django.views.debug import ExceptionReporter
+        from django.conf import settings
+        import models
+        user = None
+        line = 0
+        text = ''
+        url = ''
+        try:
+            if sys.version_info < (2,5):
+                # A nasty workaround required because Python 2.4's logging
+                # module doesn't support passing in extra context.
+                # For this handler, the only extra data we need is the
+                # request, and that's in the top stack frame.
+                request = record.exc_info[2].tb_frame.f_locals['request']
+            else:
+                request = record.request
+
+            request_repr = repr(request)
+            if request.user.is_authenticated():
+                user = request.user
+            url = request.META.get('PATH_INFO', '')
+        except:
+            request = None
+            request_repr = "%s %s\n\nRequest repr() unavailable" % (record.levelname, record.msg)
+
+        if record.exc_info:
+            stack_trace = '\n'.join(traceback.format_exception(*record.exc_info))
+            stack_info = traceback.extract_tb(record.exc_info[2])
+            if stack_info:
+                url = stack_info[-1][0]
+                line = stack_info[-1][1]
+        else:
+            stack_trace = 'No stack trace available'
+
+        text = "%s\n\n%s" % (stack_trace, request_repr)
+        if text:
+            l = models.Log(
+                text=text,
+                line=line,
+                url=url
+            )
+            if user:
+                l.user = user
+            l.save()

pandora/app/models.py

@@ -24,7 +24,7 @@ class Log(models.Model):
     text = models.TextField(blank=True)
 
     def __unicode__(self):
-        return self.id
+        return u"%s" % self.id
 
     def json(self):
         return {

pandora/app/views.py

@@ -108,17 +108,18 @@ def log(request):
         }
     '''
     data = json.loads(request.POST['data'])
-    if not request.user.is_authenticated:
+    if request.user.is_authenticated():
         user = request.user
     else:
         user = None
     if 'text' in data:
         l = models.Log(
-            user=user,
             text=data['text'],
             line=int(data.get('line', 0)),
             url=data.get('url', '')
         )
+        if user:
+            l.user = user
         l.save()
     response = json_response()
     return render_to_json_response(response)

pandora/settings.py

@@ -144,23 +144,19 @@ INSTALLED_APPS = (
     'urlalias',
 )
 
-# A sample logging configuration. The only tangible logging
+# Log errors into db
-# performed by this configuration is to send an email to
-# the site admins on every HTTP 500 error.
-# See http://docs.djangoproject.com/en/dev/topics/logging for
-# more details on how to customize your logging configuration.
 LOGGING = {
     'version': 1,
     'disable_existing_loggers': False,
     'handlers': {
-        'mail_admins': {
+        'errors': {
             'level': 'ERROR',
-            'class': 'django.utils.log.AdminEmailHandler'
+            'class': 'pandora.app.log.ErrorHandler'
         }
     },
     'loggers': {
         'django.request': {
-            'handlers': ['mail_admins'],
+            'handlers': ['errors'],
             'level': 'ERROR',
             'propagate': True,
         },