initial commit: »don't fear the nervous delete finger«
authorPascal Volk <user@localhost.localdomain.org>
Fri, 06 Nov 2009 05:15:51 +0000
changeset 0 3acd8a788a6f
child 1 bab77be235a8
initial commit: »don't fear the nervous delete finger«
.hgignore
mailtb.py
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/.hgignore	Fri Nov 06 05:15:51 2009 +0000
@@ -0,0 +1,6 @@
+# use glob syntax.
+syntax: glob
+
+*.py?
+.*.swp
+.swp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mailtb.py	Fri Nov 06 05:15:51 2009 +0000
@@ -0,0 +1,147 @@
+#!/usr/bin/env python
+# -*- coding: UTF-8  -*-
+
+"""
+Sends information about uncaught exceptions per email.
+
+"""
+
+import sys
+import smtplib
+import traceback
+from os import environ as env
+from time import ctime, gmtime, localtime, strftime, time
+
+# make sure that the web server can write to this file
+mail_error_file = '/tmp/mailtb_error.log'
+mail_config = {# sender information
+               'from_addr': '',
+               'from_name': '',
+               # smtp auth information (if necessary, else leave blank)
+               'auth_user': '',
+               'auth_pass': '',
+               # recipient information
+               'rcpt_addr': '',
+               'rcpt_name': '',
+               # smtp server information
+               'smtp_host': 'localhost',
+               'smtp_port': 25, # 25 smtp, 587 submission, 465 ssmtp (obsolete)
+               'smtp_tls':  False, # True or False (use starttls on port 25/587)
+               # subject of the email
+               'subject': 'Exception Notification'
+              }
+
+def log_mail_error(error, timestamp):
+    try:
+        prefix = strftime('%b %d %H:%M:%S', localtime(timestamp))
+        line = error.message if len(error.message) else error.args
+        logfile = open(mail_error_file, 'a')
+        logfile.write('%s %s: %s\n' % (prefix, error.__class__.__name__, line))
+        logfile.close()
+    except:
+        pass
+
+def send_header():
+    write = sys.stdout.write
+    #write('Content-Type: text/html; charset=utf-8\r\n')
+    write('Content-Type: application/xhtml+xml; charset=utf-8\r\n')
+    write('Status: 500 Internal Server Error\r\n\r\n')
+    sys.stdout.flush()
+
+def send_error_page():
+    send_header()
+    print """<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
+  "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
+<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="de">
+  <head>
+    <title>Internal Server Error</title>
+    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
+  </head>
+  <body>
+    <h1>Internal Server Error</h1>
+    <p>So wie es aussieht, ging bei der Bearbeitung Ihrer Anfrage etwas
+    schief.</p>
+    <p>Sofern Sie den Fehler verursacht haben, dürfen Sie jetzt ein schlechtes
+    Gewissen haben.<br />
+    Die Administration wird sich bei nächster Gelegenheit um das Problem
+    kümmern. Bitte haben Sie dafür etwas Verständnis.</p>
+    <h2>Error 500</h2>
+    <p>Sorry</p>
+  </body>
+</html>"""
+
+def send_mail(info):
+    global mail_config
+    mail_config['now'] = time()
+    mail_config['host'] = info['host'] if info['host'] != 'n/a' else 'localhost'
+    mail_config['date'] = strftime('%a, %d %b %Y %H:%M:%S +0000',
+            gmtime(mail_config['now']))
+    body = """Hi,
+
+an uncaught exception has occurred. The details are as follows:
+
+  Type:    %(extype)s
+  Message: %(message)s
+
+Traceback (most recent call last):
+%(traceback)s
+
+Additional information:
+  Date:     %(date)s
+  Request:  %(method)s %(uri)s %(protocol)s
+  Referrer: %(referer)s
+  Client:   %(addr)s/%(port)s
+  U-Agent:  %(agent)s
+""" % info
+    header = """Date: %(date)s
+From: "%(from_name)s" <%(from_addr)s>
+To: "%(rcpt_name)s" <%(rcpt_addr)s>
+Subject: %(subject)s
+Message-ID: <%(now)f.%(now)X@mailtb.%(host)s>
+Auto-Submitted: auto-generated
+MIME-Version: 1.0
+Content-Type: text/plain; charset=utf-8
+Content-Transfer-Encoding: 8bit
+""" % mail_config
+    
+    try:
+        if mail_config['smtp_port'] != 465:
+            smtp = smtplib.SMTP(mail_config['smtp_host'],
+                    mail_config['smtp_port'])
+            if mail_config['smtp_tls']:
+                smtp.starttls()
+        else:
+            smtp = smtplib.SMTP_SSL(mail_config['smtp_host'],
+                    mail_config['smtp_port'])
+        if len(mail_config['auth_user']) and len(mail_config['auth_pass']):
+            smtp.login(mail_config['auth_user'], mail_config['auth_pass'])
+        smtp.sendmail(mail_config['from_addr'], mail_config['rcpt_addr'],
+                '\n'.join((header, body)))
+    except Exception, e:
+        # try to log it (fire and forget)
+        log_mail_error(e, mail_config['now'])
+    finally:
+        smtp.quit()
+
+def mailtbhook(extype, exval, extb):
+    info = {}
+    if type(extype) is type:
+        info['extype'] = extype.__name__
+    else:
+        info['extype'] = str(extype).split("'")[1]
+    if hasattr(exval, 'message'):
+        info['message'] = exval.message if len(exval.message) else 'n/a'
+    else:
+        info['message'] = str(exval)
+    info['traceback'] = ''.join(['%s\n' % l for l in traceback.format_tb(extb)])
+    
+    info['date'] = ctime()
+    for k in ('HTTP_HOST', 'HTTP_REFERER', 'HTTP_USER_AGENT', 'REMOTE_ADDR',
+             'REMOTE_PORT', 'REQUEST_METHOD', 'REQUEST_URI', 'SERVER_PROTOCOL'):
+        info[k.split('_')[-1].lower()] = env[k] if env.has_key(k) else 'n/a'
+
+    send_mail(info)
+    send_error_page()
+
+def enable():
+    sys.excepthook = mailtbhook