Initial support for apache 2.4

Original apache-top doesn't work on apache 2.4 because of small
diferences in output. There is new table with thread listing on
top of output which cause troubles.

This initial support just ignore this table so everything works
in same way as in 2.2 and older.

Author: kepi

apache-top.py

@@ -20,20 +20,23 @@
 #
 
 from HTMLParser import HTMLParser
+from distutils.version import StrictVersion
 import operator
 import sys
 import urllib
 import curses
 import traceback
 import getopt
 import time
+import re
 
 
 class ApacheStatusParser(HTMLParser):
     """
     Clase que parseja la sortida del handler server-status de apache
     """
 
+    apache_version = 0
     performance_info = 2
     scoreboard = 3
     proceses = 4
@@ -56,6 +59,15 @@ def __init__(self):
         self.append = False
         self.status = 1
 
+    def set_apache_version(self, version):
+        self.apache_version = version
+        if self.apache_new():
+            self.scoreboard = 4
+            self.proceses = 5
+
+    def apache_new(self):
+        return StrictVersion(self.apache_version) >= StrictVersion('2.4.0')
+
     def handle_starttag(self, tag, attrs):
         if tag == "b":
             return
@@ -141,7 +153,7 @@ def usage(exit = 1):
     print main.__doc__
     sys.exit(exit)
 
-def print_screen(screen, url, show_scoreboard):
+def print_screen(screen, url, show_scoreboard, apache_version):
     screen = stdscr.subwin(0, 0)
     screen.nodelay(1)
 
@@ -156,6 +168,7 @@ def print_screen(screen, url, show_scoreboard):
     while not end:
         try:
             data = ApacheStatusParser()
+            data.set_apache_version(apache_version)
             statusdata = urllib.urlopen(url).read()
             data.feed(statusdata)
             data.eval_data()
@@ -165,9 +178,22 @@ def print_screen(screen, url, show_scoreboard):
             screen.clear()
 
             # imprimim el header
-            screen.addstr(0,0,data.performance_info_data[5].replace("Server uptime: ","Uptime:").replace(" days","d").replace(" day","d").replace(" hours","h").replace(" hour","h").replace(" minutes","m").replace(" minute","m").replace(" seconds","s").replace("second","s") + ", " + data.performance_info_data[3])
-            screen.addstr(1,0,data.performance_info_data[7])
-            screen.addstr(2,0,data.performance_info_data[8].replace("request","req").replace("second","sec") + ", Active/Idle: " + data.performance_info_data[9].split()[0] + "/" + data.performance_info_data[9].split()[5])
+            if data.apache_new():
+                data_uptime = 7
+                data_restart = 4
+                data_cpu = 10
+                data_reqs = 11
+                data_procs = 12
+            else:
+                data_uptime = 5
+                data_restart = 3
+                data_cpu = 7
+                data_reqs = 8
+                data_procs = 9
+
+            screen.addstr(0,0,data.performance_info_data[data_uptime].replace("Server uptime: ","Uptime:").replace(" days","d").replace(" day","d").replace(" hours","h").replace(" hour","h").replace(" minutes","m").replace(" minute","m").replace(" seconds","s").replace("second","s") + ", " + data.performance_info_data[data_restart])
+            screen.addstr(1,0,data.performance_info_data[data_cpu])
+            screen.addstr(2,0,data.performance_info_data[data_reqs].replace("request","req").replace("second","sec") + ", Active/Idle: " + data.performance_info_data[data_procs].split()[0] + "/" + data.performance_info_data[data_procs].split()[5])
 
             # evaluar scoreboard
             if show_scoreboard:
@@ -309,7 +335,7 @@ def print_process(y,x,screen,process,columns,show_only_active,width):
     else:
         return 0
 
-def main(url, stdscr, show_scoreboard):
+def main(url, stdscr, show_scoreboard, apache_version):
     """Shows the actual status of the Apache web server using the server-status
 url. It needs the ExtendedStatus flag
 
@@ -351,7 +377,7 @@ def main(url, stdscr, show_scoreboard):
     }
 
     try:
-    	print_screen(stdscr,url,show_scoreboard)
+    	print_screen(stdscr,url,show_scoreboard,apache_version)
     except:
     	raise
 
@@ -380,6 +406,10 @@ def main(url, stdscr, show_scoreboard):
         usage()
 
     try:
+        data = ApacheStatusParser()
+        statusdata = urllib.urlopen(url).read()
+        # detect apache version
+        apache_version = re.search('Server Version: Apache/([^ ]+)', statusdata).group(1)
         # Initialize curses
         stdscr=curses.initscr()
         # Turn off echoing of keys, and enter cbreak mode,
@@ -392,7 +422,7 @@ def main(url, stdscr, show_scoreboard):
         # a special value like curses.KEY_LEFT will be returned
         stdscr.keypad(1)
         try:
-		main(url,stdscr,show_scoreboard)                    # Enter the main loop
+		main(url,stdscr,show_scoreboard,apache_version)                    # Enter the main loop
 	except:
 		raise
         # Set everything back to normal