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import nntplib
import re
import time
import StringIO
# We need setting.forward_host, which is the nntp server we forward to
import settings
# This is an additional backend for Papercut, currently it's more or less proof-of-concept.
# It's a "forwarding proxy", that merely forwards all requests to a "real" NNTP server.
# Just for fun, the post command adds an additional header.
#
# Written by Gerhard Hring (gerhard@bigfoot.de)
def log(s):
# For debugging, replace with "pass" if this gets stable one day
print s
class Papercut_Storage:
def __init__(self):
self.nntp = nntplib.NNTP(settings.forward_host)
def group_exists(self, group_name):
try:
self.nntp.group(group_name)
except nntplib.NNTPTemporaryError, reason:
return 0
return 1
def get_first_article(self, group_name):
log(">get_first_article")
# Not implemented
return 1
def get_group_stats(self, container):
# log(">get_group_stats")
# Returns: (total, maximum, minimum)
max, min = container
return (max-min, max, min)
def get_message_id(self, msg_num, group):
return '<%s@%s>' % (msg_num, group)
def get_NEWGROUPS(self, ts, group='%'):
log(">get_NEWGROUPS")
date = time.strftime("%y%m%d", ts)
tim = time.strftime("%H%M%S", ts)
response, groups = self.nntp.newgroups(date, tim)
return "\r\n".join(["%s" % k for k in (1,2,3)])
def get_NEWNEWS(self, ts, group='*'):
log(">get_NEWNEWS")
articles = []
articles.append("<%s@%s>" % (id, group))
if len(articles) == 0:
return ''
else:
return "\r\n".join(articles)
def get_GROUP(self, group_name):
# Returns: (total, first_id, last_id)
log(">get_GROUP")
response, count, first, last, name = self.nntp.group(group_name)
return (count, first, last)
def get_LIST(self, username=""):
# Returns: list of (groupname, table)
log(">get_LIST")
response, lst= self.nntp.list()
def convert(x):
return x[0], (int(x[1]), int(x[2]))
lst = map(convert, lst)
return lst
def get_STAT(self, group_name, id):
log(">get_STAT")
try:
resp, nr, id = self.nntp.stat(id)
return nr
except nntplib.NNTPTemporaryError, reason:
return None
def get_ARTICLE(self, group_name, id):
log(">get_ARTICLE")
resp, nr, id, headerlines = self.nntp.head(id)
resp, nr, id, articlelines = self.nntp.article(id)
dobreak = 0
while 1:
if articlelines[0] == "":
dobreak = 1
del articlelines[0]
if dobreak:
break
return ("\r\n".join(headerlines), "\n".join(articlelines))
def get_LAST(self, group_name, current_id):
log(">get_LAST")
# Not implemented
return None
def get_NEXT(self, group_name, current_id):
log(">get_NEXT")
# Not implemented
return None
def get_HEAD(self, group_name, id):
log(">get_HEAD")
resp, nr, mid, headerlines = self.nntp.head(id)
return "\r\n".join(headerlines)
def get_BODY(self, group_name, id):
log(">get_BODY")
resp, nr, mid, bodylines = self.nntp.body(id)
return "\r\n".join(bodylines)
def get_XOVER(self, group_name, start_id, end_id='ggg'):
# subject\tauthor\tdate\tmessage-id\treferences\tbyte count\tline count\r\n
log(">get_XOVER")
xov = list(self.nntp.xover(start_id, end_id)[1])
nxov = []
for entry in xov:
entry = list(entry)
entry[5] = "\n".join(entry[5])
nxov.append("\t".join(entry))
return "\r\n".join(nxov)
def get_LIST_ACTIVE(self, pat):
log(">get_LIST_ACTIVE")
resp, list = self.nntp.longcmd('LIST ACTIVE %s' % pat)
return list
def get_XPAT(self, group_name, header, pattern, start_id, end_id='ggg'):
log(">get_XPAT")
return None
def get_LISTGROUP(self, group_name=""):
log(">get_LISTGROUP")
ids = []
self.nntp.putcmd("LISTGROUP %s" % group_name)
while 1:
curline = self.nntp.getline()
if curline == ".":
break
ids.append(curline)
return "\r\n".join(ids)
def get_XGTITLE(self, pattern="*"):
log(">get_XGTITLE")
resp, result = self.nntp.xgtitle(pattern)
return "\r\n".join(["%s %s" % (group, title) for group, title in result])
def get_XHDR(self, group_name, header, style, range):
log(">get_XHDR")
if style == "range":
range = "-".join(range)
resp, result = self.nntp.xhdr(header, range)
result = map(lambda x: x[1], result)
return "\r\n".join(result)
def do_POST(self, group_name, lines, ip_address, username=''):
log(">do_POST")
while lines.find("\r") > 0:
lines = lines.replace("\r", "")
lns = lines.split("\n")
counter = 0
for l in lns:
if l == "":
lns.insert(counter, "X-Modified-By: Papercut's forwarding backend")
break
counter +=1
lines = "\n".join(lns)
# we need to send an actual file
f = StringIO.StringIO(lines)
result = self.nntp.post(f)
return result
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