141 lines
4.2 KiB
Python
141 lines
4.2 KiB
Python
"""Inspired from
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https://github.com/petermat/spamassassin_client
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"""
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import logging
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import socket
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from io import BytesIO
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import re2 as re
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import select
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from app.log import LOG
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divider_pattern = re.compile(rb"^(.*?)\r?\n(.*?)\r?\n\r?\n", re.DOTALL)
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first_line_pattern = re.compile(rb"^SPAMD/[^ ]+ 0 EX_OK$")
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class SpamAssassin(object):
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def __init__(self, message, timeout=20, host="127.0.0.1", spamd_user="spamd"):
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self.score = None
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self.symbols = None
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self.spamd_user = spamd_user
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self.report_json = dict()
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self.report_fulltext = ""
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self.score = -999
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# Connecting
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client = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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client.settimeout(timeout)
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client.connect((host, 783))
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# Sending
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client.sendall(self._build_message(message))
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client.shutdown(socket.SHUT_WR)
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# Reading
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resfp = BytesIO()
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while True:
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ready = select.select([client], [], [], timeout)
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if ready[0] is None:
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# Kill with Timeout!
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logging.info("[SpamAssassin] - Timeout ({0}s)!".format(str(timeout)))
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break
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data = client.recv(4096)
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if data == b"":
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break
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resfp.write(data)
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# Closing
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client.close()
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client = None
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self._parse_response(resfp.getvalue())
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def _build_message(self, message):
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reqfp = BytesIO()
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data_len = str(len(message)).encode()
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reqfp.write(b"REPORT SPAMC/1.2\r\n")
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reqfp.write(b"Content-Length: " + data_len + b"\r\n")
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reqfp.write(f"User: {self.spamd_user}\r\n\r\n".encode())
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reqfp.write(message)
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return reqfp.getvalue()
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def _parse_response(self, response):
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if response == b"":
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logging.info("[SPAM ASSASSIN] Empty response")
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return None
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match = divider_pattern.match(response)
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if not match:
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logging.error("[SPAM ASSASSIN] Response error:")
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logging.error(response)
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return None
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first_line = match.group(1)
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headers = match.group(2)
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body = response[match.end(0) :]
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# Checking response is good
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match = first_line_pattern.match(first_line)
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if not match:
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logging.error("[SPAM ASSASSIN] invalid response:")
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logging.error(first_line)
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return None
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report_list = [
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s.strip() for s in body.decode("utf-8", errors="ignore").strip().split("\n")
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]
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linebreak_num = report_list.index([s for s in report_list if "---" in s][0])
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tablelists = [s for s in report_list[linebreak_num + 1 :]]
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self.report_fulltext = "\n".join(report_list)
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# join line when current one is only wrap of previous
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tablelists_temp = []
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if tablelists:
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for _, tablelist in enumerate(tablelists):
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if len(tablelist) > 1:
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if (tablelist[0].isnumeric() or tablelist[0] == "-") and (
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tablelist[1].isnumeric() or tablelist[1] == "."
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):
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tablelists_temp.append(tablelist)
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else:
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if tablelists_temp:
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tablelists_temp[-1] += " " + tablelist
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tablelists = tablelists_temp
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# create final json
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self.report_json = dict()
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for tablelist in tablelists:
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wordlist = re.split(r"\s+", tablelist)
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try:
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self.report_json[wordlist[1]] = {
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"partscore": float(wordlist[0]),
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"description": " ".join(wordlist[1:]),
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}
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except ValueError:
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LOG.w("Cannot parse %s %s", wordlist[0], wordlist)
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headers = (
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headers.decode("utf-8")
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.replace(" ", "")
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.replace(":", ";")
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.replace("/", ";")
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.split(";")
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)
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self.score = float(headers[2])
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def get_report_json(self):
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return self.report_json
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def get_score(self):
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return self.score
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def is_spam(self, level=5):
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return self.score is None or self.score > level
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def get_fulltext(self):
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return self.report_fulltext
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