sanand0 · August 29, 2015 14:00 · Aug 24, 2014 · Jul 27, 2014 · Jul 27, 2014 · Apr 19, 2014
diff --git a/monitor.py b/monitor.py
@@ -36,7 +36,8 @@ def monitor_url(url, tests):
                     url, tests = row[0], row[1]
                     monitor_url(url, tests)
         except urllib2.URLError, e:
-            messages.append([url, str(e) + '. Ignore this'])
+            # Ignore these messages
+            pass
         except Exception, e:
             messages.append([url, str(e)])
 

diff --git a/monitor.py b/monitor.py
@@ -36,7 +36,7 @@ def monitor_url(url, tests):
                     url, tests = row[0], row[1]
                     monitor_url(url, tests)
         except urllib2.URLError, e:
-            messages.append([url, str(e), 'This can be ignored'])
+            messages.append([url, str(e) + '. Ignore this'])
         except Exception, e:
             messages.append([url, str(e)])
 

diff --git a/monitor.py b/monitor.py
@@ -7,14 +7,16 @@
 import re
 import urllib2
 
+
 def monitor_url(url, tests):
     response = urllib2.urlopen(url)
     info = response.info()
     info['Status'] = str(response.getcode())
     for header, pattern in tests:
         value = info.getheader(header)
         if not re.match(pattern, value):
-            raise AssertionError('%s: %s does not match %s' %
+            raise AssertionError(
+                '%s: %s does not match %s' %
                 (header, value, pattern))
 
 if __name__ == '__main__':
@@ -29,9 +31,12 @@ def monitor_url(url, tests):
             if isinstance(row, basestring):
                 url = row
                 monitor_url(url, [])
-            elif hasattr(row, '__getitem__') and hasattr(row, '__len__') and len(row) > 1:
-                url, tests = row[0], row[1]
-                monitor_url(url, tests)
+            elif hasattr(row, '__getitem__') and hasattr(row, '__len__'):
+                if len(row) > 1:
+                    url, tests = row[0], row[1]
+                    monitor_url(url, tests)
+        except urllib2.URLError, e:
+            messages.append([url, str(e), 'This can be ignored'])
         except Exception, e:
             messages.append([url, str(e)])
 
@@ -44,7 +49,8 @@ def monitor_url(url, tests):
             msg = MIMEText(msg)
             msg['From'] = config.sender
             msg['To'] = config.to
-            msg['Subject'] = config.subject + ' %d/%d' % (len(messages), len(config.urls))
+            msg['Subject'] = config.subject + ' %d/%d' % (
+                len(messages), len(config.urls))
             p = Popen([config.sendmail, '-t'], stdin=PIPE)
             p.communicate(msg.as_string())
         else:

diff --git a/monitor.py b/monitor.py
@@ -44,7 +44,7 @@ def monitor_url(url, tests):
             msg = MIMEText(msg)
             msg['From'] = config.sender
             msg['To'] = config.to
-            msg['Subject'] = config.subject + ' {:d}/{:d}'.format(len(messages), len(config.urls))
+            msg['Subject'] = config.subject + ' %d/%d' % (len(messages), len(config.urls))
             p = Popen([config.sendmail, '-t'], stdin=PIPE)
             p.communicate(msg.as_string())
         else:

diff --git a/.gitignore b/.gitignore
@@ -0,0 +1 @@
+*.pyc
diff --git a/README.md b/README.md
@@ -0,0 +1,4 @@
+A simple website monitor.
+
+1. Edit `config.py` and add a list of URLs.
+2. Set up a cron job to run `python monitor.py` periodically
diff --git a/config.py b/config.py
@@ -0,0 +1,9 @@
+sender = '[email protected]'
+to = '[email protected]'
+subject = 'Site monitoring errors'
+sendmail = '/usr/sbin/sendmail'
+
+urls = (
+    'http://gramener.com/',
+    'http://blog.gramener.com/',
+)
diff --git a/monitor.py b/monitor.py
@@ -0,0 +1,51 @@
+#!/usr/bin/python
+
+"""
+A simple website HTTP header monitor tool.
+"""
+
+import re
+import urllib2
+
+def monitor_url(url, tests):
+    response = urllib2.urlopen(url)
+    info = response.info()
+    info['Status'] = str(response.getcode())
+    for header, pattern in tests:
+        value = info.getheader(header)
+        if not re.match(pattern, value):
+            raise AssertionError('%s: %s does not match %s' %
+                (header, value, pattern))
+
+if __name__ == '__main__':
+    import config
+    from os.path import exists
+    from email.mime.text import MIMEText
+    from subprocess import Popen, PIPE
+
+    messages = []
+    for row in config.urls:
+        try:
+            if isinstance(row, basestring):
+                url = row
+                monitor_url(url, [])
+            elif hasattr(row, '__getitem__') and hasattr(row, '__len__') and len(row) > 1:
+                url, tests = row[0], row[1]
+                monitor_url(url, tests)
+        except Exception, e:
+            messages.append([url, str(e)])
+
+    if len(messages) > 0:
+        msg = '\n\n'.join(
+            url + '\n' + msg
+            for url, msg in messages
+        )
+        if exists(config.sendmail):
+            msg = MIMEText(msg)
+            msg['From'] = config.sender
+            msg['To'] = config.to
+            msg['Subject'] = config.subject + ' {:d}/{:d}'.format(len(messages), len(config.urls))
+            p = Popen([config.sendmail, '-t'], stdin=PIPE)
+            p.communicate(msg.as_string())
+        else:
+            print msg