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import sys
import rfc822, string, time
# A utility function 2 of these classes use:
def AddBackNewline(str):
return str + '\n'
# If we're trying to create a message object from text, we need to pass
# a file object to rfc822.Message to get it to do its magic. Well,
# to avoid writing text out to a file, and having it read back in,
# here we define a class that will fool rfc822 into thinking it's a non-seekable
# message.
# The only method rfc822.Message ever calls on a non-seekable file is
# readline. It doesn't use the optional arg to readline, either.
# In my subclasses, I use the read() method, and might just use readlines()
# someday.
#
# It might be useful to expand this into a full blown fully functional class.
class FakeFile:
def __init__(self, text):
self.lines = map(AddBackNewline, string.split(text, '\n'))
self.curline = 0
self.lastline = len(self.lines) - 1
def readline(self):
if self.curline > self.lastline:
return ''
self.curline = self.curline + 1
return self.lines[self.curline - 1]
def read(self):
startline = self.curline
self.curline = self.lastline + 1
return string.join(self.lines[startline:], '')
def readlines(self):
startline = self.curline
self.curline = self.lastline + 1
return self.lines[startline:]
# We know the message is gonna come in on stdin or from text for our purposes.
class IncomingMessage(rfc822.Message):
def __init__(self, text=None):
if not text:
rfc822.Message.__init__(self, sys.stdin, 0)
self.body = self.fp.read()
else:
rfc822.Message.__init__(self, FakeFile(text), 0)
self.body = self.fp.read()
def GetSender(self):
# Look for a Sender field.
sender = self.getheader('sender')
if sender:
realname, mail_address = self.getaddr('sender')
else:
try:
realname, mail_address = self.getaddr('from')
except:
# The unix from line is all we have left...
if self.unixfrom:
return string.lower(string.split(self.unixfrom)[1])
return string.lower(mail_address)
def GetSenderName(self):
real_name, mail_addr = self.getaddr('from')
if not real_name:
return self.GetSender()
return real_name
def SetHeader(self, name, value, crush_duplicates=1):
# Well, we crush dups in the dict no matter what...
name = "%s%s" % (name[0], name[1:])
self.dict[string.lower(name)] = value
if value[-1] <> '\n':
value = value + '\n'
if not crush_duplicates:
self.headers.append('%s: %s' % (name, value))
return
for i in range(len(self.headers)):
if (string.lower(self.headers[i][:len(name)+1]) ==
string.lower(name) + ':'):
self.headers[i] = '%s: %s' % (name, value)
# This is a simplistic class. It could do multi-line headers etc...
# But it doesn't because I don't need that for this app.
class OutgoingMessage:
def __init__(self, headers=None, body='', sender=None):
self.cached_headers = {}
if headers:
self.SetHeaders(headers)
else:
self.headers = []
self.body = body
self.sender = sender
def SetHeaders(self, headers):
self.headers = map(AddBackNewline, string.split(headers, '\n'))
def CacheHeaders(header, s=self):
i = string.find(header, ':')
s.cached_headers[string.lower(string.strip(header[:i]))] = \
header[i+2:]
map(CacheHeaders, self.headers)
def SetHeader(self, header, value, crush_duplicates=1):
if value[-1] <> '\n':
value = value + '\n'
if crush_duplicates:
# Run through the list and make sure the header isn't already there.
remove_these = []
for item in self.headers:
f = string.find(item, ':')
if string.lower(item[:f]) == string.lower(header):
remove_these.append(item)
for item in remove_these:
self.headers.remove(item)
del remove_these
self.headers.append('%s%s: %s' % (string.upper(header[0]),
string.lower(header[1:]),
value))
self.cached_headers[string.lower(header)] = value
def SetBody(self, body):
self.body = body
def AppendToBody(self, text):
self.body = self.body + text
def SetSender(self, sender, set_from=1):
self.sender = sender
if not self.getheader('from') and set_from:
self.SetHeader('from', sender)
def SetDate(self, date=time.ctime(time.time())):
self.SetHeader('date', date)
def GetSender(self):
return self.sender
# Lower case the name to give it the same UI as IncomingMessage
# inherits from rfc822
def getheader(self, str):
str = string.lower(str)
if not self.cached_headers.has_key(str):
return None
return self.cached_headers[str]
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