TLD_Builder/mailer.py

   1 # vi: encoding=utf-8 ts=8 sts=4 sw=4 et
   2
   3 import time
   4 import os
   5 import sys
   6 from io import StringIO
   7 from config import config
   8 import shutil
   9 import log
  10
  11 def recode(s):
  12     if s.__class__ == ''.__class__:
  13         return s.encode('iso-8859-1', 'replace').decode('us-ascii', 'replace')
  14     else:
  15         return s.decode('us-ascii', 'replace')
  16
  17 class Message:
  18     def __init__(self):
  19         self.headers = {}
  20         self.body = StringIO()
  21         self.set_std_headers()
  22
  23     def set_header(self, n, v):
  24         self.headers[n] = v
  25
  26     def set_headers(self, to = None, cc = None, subject = None):
  27         if to != None:
  28             self.set_header("To", to)
  29         if cc != None:
  30             self.set_header("Cc", cc)
  31         if subject != None:
  32             self.set_header("Subject", subject)
  33
  34     def remove_header(self, n):
  35         if n in self.headers:
  36             del self.headers[n]
  37
  38     def write_line(self, l):
  39         self.body.write(recode("%s\n" % l))
  40
  41     def write(self, s):
  42         self.body.write(recode(s))
  43
  44     def append_log(self, log):
  45         s = os.stat(log)
  46         if s.st_size > 50000:
  47             # just head and tail
  48             f = open(log)
  49             line_cnt = 0
  50             for l in f:
  51                 line_cnt += 1
  52             f.seek(0)
  53             line = 0
  54             for l in f:
  55                 if line < 100 or line > line_cnt - 100:
  56                     self.body.write(recode(l))
  57                 if line == line_cnt - 100:
  58                     self.body.write("\n\n[...]\n\n")
  59                 line += 1
  60         else:
  61             shutil.copyfileobj(open(log), self.body)
  62
  63     def set_std_headers(self):
  64         self.headers["Date"] = time.strftime("%a, %d %b %Y %H:%M:%S +0000", time.gmtime())
  65         self.headers["Message-ID"] = "<tld-builder.%f.%d@%s>" \
  66                 % (time.time(), os.getpid(), os.uname()[1])
  67         self.headers["From"] = "TLD %s builder <%s>" \
  68                 % (config.builder, config.email)
  69         self.headers["X-TLD-Builder"] = config.builder
  70
  71     def write_to(self, f):
  72         for k, v in self.headers.items():
  73             f.write("%s: %s\n" % (k, v))
  74         f.write("\n")
  75         self.body.seek(0)
  76         shutil.copyfileobj(self.body, f)
  77
  78     def send(self):
  79         if not os.path.exists("/usr/lib/sendmail"):
  80             # TODO: dump to file?
  81             log.alert("/usr/lib/sendmail doesn't exist: Can't send email")
  82             return False
  83         send_sendmail = "/usr/lib/sendmail -i -t -f %s" % config.admin_email
  84         f = os.popen(send_sendmail, "w")
  85         try:
  86             self.write_to(f)
  87         except IOError as e:
  88             log.alert("sending email message failed: %s" % e)
  89             f.close()
  90             return False
  91         return f.close()