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