<NME> logparser.py
<BEF> ADDFILE
<MSG> mailrrd.py needs to be splitted. One part is going to check for new stats frequently (this is the job of the new logparser.py module). The other will provide an API to fetch data and generate graphes. (not done yet)

<DFF> @@ -0,0 +1,224 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+import time
+import sys
+import os
+import re
+import rrdtool
+from optparse import OptionParser
+from django.conf import settings
+from mailng.admin.models import Domain
+
+"""
+Postfix log parser.
+
+
+"""
+
+rrdstep = 60
+xpoints = 540
+points_per_sample = 3
+
+class LogParser(object):
+    def __init__(self, logfile, workdir,
+                 year=None, debug=False, verbose=False):
+        self.logfile = logfile
+        try:
+            self.f = open(logfile)
+        except IOError:
+            sys.exit(1)
+#         except (IOError, errno, strerror):
+#             print "[rrd] I/O error({0}): {1} ".format(errno, strerror)+logfile
+#             return None
+        self.workdir = workdir
+        self.year = year
+        self.debug = debug
+        self.verbose = verbose
+        self.cfs = ['AVERAGE', 'MAX']
+        
+        self.last_month = None
+        if not self.year:
+            self.year = time.localtime().tm_year
+        self.data = {}
+        domains = Domain.objects.all()
+        self.domains = []
+        for dom in domains:
+            self.domains += [str(dom.name)]
+            self.data[str(dom.name)] = {}
+        self.data["global"] = {}
+
+        self.workdict = {}
+        self.lupdates = {}
+        self.line_expr = re.compile("(\w+)\s+(\d+)\s+(\d+):(\d+):(\d+)\s+(\w+)\s+(\w+)/?\w*[[](\d+)[]]:\s+(.*)")
+
+    def str2Time(self, y, M, d, h, m, s):
+        """str2Time
+
+        return epoch time from Year Month Day Hour:Minute:Second time format
+        """
+        try:
+            local = time.strptime("%s %s %s %s:%s:%s" %(y, M, d, h, m, s), \
+                                      "%Y %b %d %H:%M:%S")
+        except:
+            print "[rrd] ERROR unrecognized %s time format" %(y, M, d, h, m, s)
+            return 0
+        return int(time.mktime(local))
+
+    def init_rrd(self, fname, m):
+        """init_rrd
+
+        Set-up Data Sources (DS)
+        Set-up Round Robin Archives (RRA):
+        - day,week,month and year archives
+        - 2 types : AVERAGE and MAX
+
+        parameter : start time
+        return    : last epoch recorded
+        """
+        ds_type = 'ABSOLUTE'
+        rows = xpoints / points_per_sample
+        realrows = int(rows * 1.1)    # ensure that the full range is covered
+        day_steps = int(3600 * 24 / (rrdstep * rows))
+        week_steps = day_steps * 7
+        month_steps = week_steps * 5
+        year_steps = month_steps * 12
+
+        # Set up data sources for our RRD
+        params = []
+        for v in ["sent", "recv", "bounced", "reje"]:
+            params += ['DS:%s:%s:%s:0:U' % (v, ds_type, rrdstep * 2)]
+
+        # Set up RRD to archive data
+        rras = []
+        for cf in ['AVERAGE', 'MAX']:
+            for step in [day_steps, month_steps, month_steps, year_steps]:
+                params += ['RRA:%s:0.5:%s:%s' % (cf, step, realrows)]
+
+        # With those setup, we can now created the RRD
+        rrdtool.create(fname,
+                       '--start', str(m),
+                       '--step', str(rrdstep),
+                       *params)
+        return m
+
+    def update_rrd(self, dom, t):
+        """update_rrd
+
+        Update RRD with records at t time.
+
+        True  : if data are up-to-date for current minute
+        False : syslog may have probably been already recorded
+        or something wrong
+        """
+        fname = "%s/%s.rrd" % (self.workdir, dom)
+        m = t - (t % rrdstep)
+        if not os.path.exists(fname):
+            self.lupdates[fname] = self.init_rrd(fname, m)
+            print "[rrd] create new RRD file"
+        else:
+            if not self.lupdates.has_key(fname):
+                self.lupdates[fname] = rrdtool.last(fname)
+
+        if m <= self.lupdates[fname]:
+            if self.verbose:
+                print "[rrd] VERBOSE events at %s already recorded in RRD" %m
+            return False
+
+        # Missing some RRD steps
+        # Est ce vraiment nécessaire... ?
+        if m > self.lupdates[fname] + rrdstep:
+            for p in range(self.lupdates[fname] + rrdstep, m, rrdstep):
+                if self.verbose:
+                    print "[rrd] VERBOSE update %s:%s:%s:%s:%s (SKIP)" \
+                          %(p,'0','0','0','0')
+                rrdtool.update(fname, "%s:%s:%s:%s:%s" \
+                                   % (p, '0', '0', '0', '0'))
+
+        if self.verbose:
+            print "[rrd] VERBOSE update %s:%s:%s:%s:%s" \
+                  %(m, self.data[dom][m]['sent'], self.data[dom][m]['recv'],\
+                    self.data[dom][m]['bounced'], self.data[dom][m]['reje'])
+
+        rrdtool.update(fname, "%s:%s:%s:%s:%s" \
+                           % (m, self.data[dom][m]['sent'],  
+                              self.data[dom][m]['recv'],
+                              self.data[dom][m]['bounced'], 
+                              self.data[dom][m]['reje']))
+        self.lupdates[fname] = m
+        return True
+
+    def inc_counter(self, dom, cur_t, counter):
+        if not self.data[dom].has_key(cur_t):
+            self.data[dom][cur_t] = \
+                {'sent' : 0, 'recv' : 0, 'bounced' : 0, 'reje' : 0}
+        self.data[dom][cur_t][counter] += 1
+
+        if not self.data["global"].has_key(cur_t):
+            self.data["global"][cur_t] = \
+                {'sent' : 0, 'recv' : 0, 'bounced' : 0, 'reje' : 0}
+        self.data["global"][cur_t][counter] += 1
+
+    def process(self):
+        for line in self.f.readlines():
+            m = self.line_expr.match(line)
+            if not m:
+                continue
+            (mo, da, ho, mi, se, host, prog, pid, log) = m.groups()
+
+            se = int(int(se) / rrdstep)            # rrd step is one-minute => se = 0
+            cur_t = self.str2Time(self.year, mo, da, ho, mi, se)
+            cur_t = cur_t - cur_t % rrdstep
+
+            m = re.search("(\w{10}): from=<(.*)>", log)
+            if m:
+                self.workdict[m.group(1)] = {'from' : m.group(2)}
+                continue
+
+            m = re.search("(\w{10}): to=<(.*)>.*status=(\S+)", log)
+            if m:
+                if not self.workdict.has_key(m.group(1)):
+                    print "Inconsistent mail, skipping"
+                    continue
+                addrfrom = re.match("([^@]+)@(.+)", self.workdict[m.group(1)]['from'])
+                if addrfrom and addrfrom.group(2) in self.domains:
+                    self.inc_counter(addrfrom.group(2), cur_t, 'sent')
+                addrto = re.match("([^@]+)@(.+)", m.group(2))
+                if addrto.group(2) in self.domains:
+                    if m.group(3) == "sent":
+                        self.inc_counter(addrto.group(2), cur_t, 'recv')
+                    else:
+                        self.inc_counter(addrto.group(2), cur_t, m.group(3))
+        
+        # Sort everything by time
+        for dom, data in self.data.iteritems():
+            sortedData = {}
+            sortedData = [ (i, data[i]) for i in sorted(data.keys()) ]
+            for t, dict in sortedData:
+                self.update_rrd(dom, t)
+
+def getoption(name, default=None):
+    res = None
+    try:
+        res = getattr(settings, name)
+    except AttributeError:
+        res = default
+    return res
+
+if __name__ == "__main__":
+    log_file = getoption("LOGFILE", "/var/log/maillog")
+    rrd_rootdir = getoption("RRD_ROOTDIR", "/tmp")
+
+    parser = OptionParser()
+    parser.add_option("-t", "--target", default="all",
+                      help="Specify which target handled while parsing log file (default to all)")
+    parser.add_option("-l","--logFile", default=log_file,
+                      help="postfix log in syslog format", metavar="FILE")
+    parser.add_option("-v","--verbose", default=False, action="store_true", 
+                      dest="verbose", help="set verbose mode")
+    parser.add_option("-d","--debug", default=False, action="store_true", 
+                      dest="debug", help="set debug mode")
+    (options, args) = parser.parse_args()
+  
+    P = LogParser(options.logFile, rrd_rootdir,
+                  debug=options.debug, verbose=options.verbose)
+    P.process()

mailrrd.py needs to be splitted. One part is going to check for new stats frequently (this is the job of the new logparser.py module). The other will provide an API to fetch data and generate graphes. (not done yet)