1163 lines
47 KiB
Python
Executable file
1163 lines
47 KiB
Python
Executable file
#!/usr/bin/env python3
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from typing import IO, Any, Dict, List, Text, Union, Set, Tuple, Optional, cast
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from types import FrameType
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import sys
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from six.moves import map
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from six.moves import range
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import json
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import re
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import time
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import subprocess
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import optparse
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import os
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import datetime
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import textwrap
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import signal
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import logging
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import hashlib
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import tempfile
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import select
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DEFAULT_SITE = "https://api.zulip.com"
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class States(object):
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Startup, ZulipToZephyr, ZephyrToZulip, ChildSending = list(range(4))
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CURRENT_STATE = States.Startup
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logger = cast(logging.Logger, None) # type: logging.Logger # FIXME cast should not be needed?
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def to_zulip_username(zephyr_username):
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# type: (str) -> str
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if "@" in zephyr_username:
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(user, realm) = zephyr_username.split("@")
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else:
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(user, realm) = (zephyr_username, "ATHENA.MIT.EDU")
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if realm.upper() == "ATHENA.MIT.EDU":
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# Hack to make ctl's fake username setup work :)
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if user.lower() == 'golem':
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user = 'ctl'
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return user.lower() + "@mit.edu"
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return user.lower() + "|" + realm.upper() + "@mit.edu"
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def to_zephyr_username(zulip_username):
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# type: (str) -> str
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(user, realm) = zulip_username.split("@")
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if "|" not in user:
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# Hack to make ctl's fake username setup work :)
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if user.lower() == 'ctl':
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user = 'golem'
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return user.lower() + "@ATHENA.MIT.EDU"
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match_user = re.match(r'([a-zA-Z0-9_]+)\|(.+)', user)
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if not match_user:
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raise Exception("Could not parse Zephyr realm for cross-realm user %s" % (zulip_username,))
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return match_user.group(1).lower() + "@" + match_user.group(2).upper()
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# Checks whether the pair of adjacent lines would have been
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# linewrapped together, had they been intended to be parts of the same
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# paragraph. Our check is whether if you move the first word on the
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# 2nd line onto the first line, the resulting line is either (1)
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# significantly shorter than the following line (which, if they were
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# in the same paragraph, should have been wrapped in a way consistent
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# with how the previous line was wrapped) or (2) shorter than 60
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# characters (our assumed minimum linewrapping threshold for Zephyr)
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# or (3) the first word of the next line is longer than this entire
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# line.
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def different_paragraph(line, next_line):
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# type: (str, str) -> bool
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words = next_line.split()
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return (len(line + " " + words[0]) < len(next_line) * 0.8 or
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len(line + " " + words[0]) < 50 or
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len(line) < len(words[0]))
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# Linewrapping algorithm based on:
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# http://gcbenison.wordpress.com/2011/07/03/a-program-to-intelligently-remove-carriage-returns-so-you-can-paste-text-without-having-it-look-awful/ #ignorelongline
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def unwrap_lines(body):
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# type: (str) -> str
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lines = body.split("\n")
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result = ""
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previous_line = lines[0]
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for line in lines[1:]:
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line = line.rstrip()
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if (re.match(r'^\W', line, flags=re.UNICODE) and
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re.match(r'^\W', previous_line, flags=re.UNICODE)):
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result += previous_line + "\n"
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elif (line == "" or
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previous_line == "" or
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re.match(r'^\W', line, flags=re.UNICODE) or
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different_paragraph(previous_line, line)):
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# Use 2 newlines to separate sections so that we
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# trigger proper Markdown processing on things like
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# bulleted lists
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result += previous_line + "\n\n"
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else:
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result += previous_line + " "
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previous_line = line
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result += previous_line
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return result
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def send_zulip(zeph):
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# type: (Dict[str, str]) -> Dict[str, str]
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message = {}
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if options.forward_class_messages:
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message["forged"] = "yes"
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message['type'] = zeph['type']
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message['time'] = zeph['time']
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message['sender'] = to_zulip_username(zeph['sender'])
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if "subject" in zeph:
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# Truncate the subject to the current limit in Zulip. No
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# need to do this for stream names, since we're only
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# subscribed to valid stream names.
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message["subject"] = zeph["subject"][:60]
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if zeph['type'] == 'stream':
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# Forward messages sent to -c foo -i bar to stream bar subject "instance"
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if zeph["stream"] == "message":
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message['to'] = zeph['subject'].lower()
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message['subject'] = "instance %s" % (zeph['subject'],)
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elif zeph["stream"] == "tabbott-test5":
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message['to'] = zeph['subject'].lower()
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message['subject'] = "test instance %s" % (zeph['subject'],)
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else:
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message["to"] = zeph["stream"]
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else:
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message["to"] = zeph["recipient"]
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message['content'] = unwrap_lines(zeph['content'])
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if options.test_mode and options.site == DEFAULT_SITE:
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logger.debug("Message is: %s" % (str(message),))
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return {'result': "success"}
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return zulip_client.send_message(message)
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def send_error_zulip(error_msg):
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# type: (str) -> None
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message = {"type": "private",
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"sender": zulip_account_email,
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"to": zulip_account_email,
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"content": error_msg,
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}
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zulip_client.send_message(message)
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current_zephyr_subs = set()
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def zephyr_bulk_subscribe(subs):
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# type: (List[Tuple[str, str, str]]) -> None
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try:
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zephyr._z.subAll(subs)
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except IOError:
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# Since we haven't added the subscription to
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# current_zephyr_subs yet, we can just return (so that we'll
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# continue processing normal messages) and we'll end up
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# retrying the next time the bot checks its subscriptions are
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# up to date.
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logger.exception("Error subscribing to streams (will retry automatically):")
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logger.warning("Streams were: %s" % ([cls for cls, instance, recipient in subs],))
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return
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try:
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actual_zephyr_subs = [cls for (cls, _, _) in zephyr._z.getSubscriptions()]
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except IOError:
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logger.exception("Error getting current Zephyr subscriptions")
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# Don't add anything to current_zephyr_subs so that we'll
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# retry the next time we check for streams to subscribe to
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# (within 15 seconds).
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return
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for (cls, instance, recipient) in subs:
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if cls not in actual_zephyr_subs:
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logger.error("Zephyr failed to subscribe us to %s; will retry" % (cls,))
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try:
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# We'll retry automatically when we next check for
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# streams to subscribe to (within 15 seconds), but
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# it's worth doing 1 retry immediately to avoid
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# missing 15 seconds of messages on the affected
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# classes
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zephyr._z.sub(cls, instance, recipient)
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except IOError:
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pass
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else:
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current_zephyr_subs.add(cls)
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def update_subscriptions():
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# type: () -> None
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try:
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f = open(options.stream_file_path, "r")
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public_streams = json.loads(f.read())
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f.close()
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except Exception:
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logger.exception("Error reading public streams:")
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return
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classes_to_subscribe = set()
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for stream in public_streams:
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zephyr_class = stream.encode("utf-8")
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if (options.shard is not None and
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not hashlib.sha1(zephyr_class).hexdigest().startswith(options.shard)):
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# This stream is being handled by a different zephyr_mirror job.
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continue
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if zephyr_class in current_zephyr_subs:
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continue
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classes_to_subscribe.add((zephyr_class, "*", "*"))
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if len(classes_to_subscribe) > 0:
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zephyr_bulk_subscribe(list(classes_to_subscribe))
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def maybe_kill_child():
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# type: () -> None
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try:
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if child_pid is not None:
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os.kill(child_pid, signal.SIGTERM)
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except OSError:
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# We don't care if the child process no longer exists, so just log the error
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logger.exception("")
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def maybe_restart_mirroring_script():
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# type: () -> None
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if os.stat(os.path.join(options.stamp_path, "stamps", "restart_stamp")).st_mtime > start_time or \
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((options.user == "tabbott" or options.user == "tabbott/extra") and
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os.stat(os.path.join(options.stamp_path, "stamps", "tabbott_stamp")).st_mtime > start_time):
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logger.warning("")
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logger.warning("zephyr mirroring script has been updated; restarting...")
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maybe_kill_child()
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try:
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zephyr._z.cancelSubs()
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except IOError:
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# We don't care whether we failed to cancel subs properly, but we should log it
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logger.exception("")
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while True:
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try:
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os.execvp(os.path.abspath(__file__), sys.argv)
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except Exception:
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logger.exception("Error restarting mirroring script; trying again... Traceback:")
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time.sleep(1)
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def process_loop(log):
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# type: (Optional[IO[Any]]) -> None
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restart_check_count = 0
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last_check_time = time.time()
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while True:
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select.select([zephyr._z.getFD()], [], [], 15)
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try:
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# Fetch notices from the queue until its empty
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while True:
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notice = zephyr.receive(block=False)
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if notice is None:
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break
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try:
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process_notice(notice, log)
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except Exception:
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logger.exception("Error relaying zephyr:")
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time.sleep(2)
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except Exception:
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logger.exception("Error checking for new zephyrs:")
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time.sleep(1)
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continue
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if time.time() - last_check_time > 15:
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last_check_time = time.time()
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try:
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maybe_restart_mirroring_script()
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if restart_check_count > 0:
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logger.info("Stopped getting errors checking whether restart is required.")
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restart_check_count = 0
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except Exception:
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if restart_check_count < 5:
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logger.exception("Error checking whether restart is required:")
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restart_check_count += 1
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if options.forward_class_messages:
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try:
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update_subscriptions()
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except Exception:
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logger.exception("Error updating subscriptions from Zulip:")
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def parse_zephyr_body(zephyr_data, notice_format):
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# type: (str, str) -> Tuple[str, str]
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try:
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(zsig, body) = zephyr_data.split("\x00", 1)
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if (notice_format == 'New transaction [$1] entered in $2\nFrom: $3 ($5)\nSubject: $4' or
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notice_format == 'New transaction [$1] entered in $2\nFrom: $3\nSubject: $4'):
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# Logic based off of owl_zephyr_get_message in barnowl
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fields = body.split('\x00')
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if len(fields) == 5:
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body = 'New transaction [%s] entered in %s\nFrom: %s (%s)\nSubject: %s' % (
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fields[0], fields[1], fields[2], fields[4], fields[3])
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except ValueError:
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(zsig, body) = ("", zephyr_data)
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# Clean body of any null characters, since they're invalid in our protocol.
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body = body.replace('\x00', '')
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return (zsig, body)
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def parse_crypt_table(zephyr_class, instance):
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# type: (Text, str) -> Optional[str]
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try:
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crypt_table = open(os.path.join(os.environ["HOME"], ".crypt-table"))
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except IOError:
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return None
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for line in crypt_table.readlines():
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if line.strip() == "":
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# Ignore blank lines
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continue
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match = re.match("^crypt-(?P<class>\S+):\s+((?P<algorithm>(AES|DES)):\s+)?(?P<keypath>\S+)$", line)
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if match is None:
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# Malformed crypt_table line
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logger.debug("Invalid crypt_table line!")
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continue
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groups = match.groupdict()
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if groups['class'].lower() == zephyr_class and 'keypath' in groups and \
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groups.get("algorithm") == "AES":
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return groups["keypath"]
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return None
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def decrypt_zephyr(zephyr_class, instance, body):
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# type: (Text, str, str) -> str
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keypath = parse_crypt_table(zephyr_class, instance)
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if keypath is None:
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# We can't decrypt it, so we just return the original body
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return body
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# Enable handling SIGCHLD briefly while we call into
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# subprocess to avoid http://bugs.python.org/issue9127
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signal.signal(signal.SIGCHLD, signal.SIG_DFL)
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# decrypt the message!
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p = subprocess.Popen(["gpg",
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"--decrypt",
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"--no-options",
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"--no-default-keyring",
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"--keyring=/dev/null",
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"--secret-keyring=/dev/null",
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"--batch",
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"--quiet",
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"--no-use-agent",
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"--passphrase-file",
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keypath],
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stdin=subprocess.PIPE,
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stdout=subprocess.PIPE,
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stderr=subprocess.PIPE)
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decrypted, _ = p.communicate(input=body) # type: ignore # Optional[bytes] vs string
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# Restore our ignoring signals
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signal.signal(signal.SIGCHLD, signal.SIG_IGN)
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return decrypted # type: ignore # bytes, expecting str
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def process_notice(notice, log):
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# type: (Any, Optional[IO[Any]]) -> None
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(zsig, body) = parse_zephyr_body(notice.message, notice.format)
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is_personal = False
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is_huddle = False
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if notice.opcode == "PING":
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# skip PING messages
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return
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zephyr_class = notice.cls.lower()
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if zephyr_class == options.nagios_class:
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# Mark that we got the message and proceed
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with open(options.nagios_path, "w") as f:
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f.write("0\n")
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return
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if notice.recipient != "":
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is_personal = True
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# Drop messages not to the listed subscriptions
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if is_personal and not options.forward_personals:
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return
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if (zephyr_class not in current_zephyr_subs) and not is_personal:
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logger.debug("Skipping ... %s/%s/%s" %
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(zephyr_class, notice.instance, is_personal))
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return
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if notice.format.startswith("Zephyr error: See") or notice.format.endswith("@(@color(blue))"):
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logger.debug("Skipping message we got from Zulip!")
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return
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if (zephyr_class == "mail" and notice.instance.lower() == "inbox" and is_personal and
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not options.forward_mail_zephyrs):
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# Only forward mail zephyrs if forwarding them is enabled.
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return
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if is_personal:
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if body.startswith("CC:"):
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is_huddle = True
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# Map "CC: user1 user2" => "user1@mit.edu, user2@mit.edu"
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huddle_recipients = [to_zulip_username(x.strip()) for x in
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body.split("\n")[0][4:].split()]
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if notice.sender not in huddle_recipients:
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huddle_recipients.append(to_zulip_username(notice.sender))
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body = body.split("\n", 1)[1]
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if options.forward_class_messages and notice.opcode.lower() == "crypt":
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body = decrypt_zephyr(zephyr_class, notice.instance.lower(), body)
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zeph = {'time': str(notice.time),
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'sender': notice.sender,
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'zsig': zsig, # logged here but not used by app
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'content': body}
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if is_huddle:
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zeph['type'] = 'private'
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zeph['recipient'] = huddle_recipients
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elif is_personal:
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zeph['type'] = 'private'
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zeph['recipient'] = to_zulip_username(notice.recipient)
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else:
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zeph['type'] = 'stream'
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zeph['stream'] = zephyr_class
|
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if notice.instance.strip() != "":
|
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zeph['subject'] = notice.instance
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else:
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zeph["subject"] = '(instance "%s")' % (notice.instance,)
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|
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# Add instances in for instanced personals
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if is_personal:
|
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if notice.cls.lower() != "message" and notice.instance.lower != "personal":
|
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heading = "[-c %s -i %s]\n" % (notice.cls, notice.instance)
|
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elif notice.cls.lower() != "message":
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heading = "[-c %s]\n" % (notice.cls,)
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elif notice.instance.lower() != "personal":
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heading = "[-i %s]\n" % (notice.instance,)
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else:
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heading = ""
|
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zeph["content"] = heading + zeph["content"]
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|
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zeph = decode_unicode_byte_strings(zeph)
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|
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logger.info("Received a message on %s/%s from %s..." %
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(zephyr_class, notice.instance, notice.sender))
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if log is not None:
|
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log.write(json.dumps(zeph) + '\n')
|
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log.flush()
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if os.fork() == 0:
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global CURRENT_STATE
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CURRENT_STATE = States.ChildSending
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# Actually send the message in a child process, to avoid blocking.
|
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try:
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res = send_zulip(zeph)
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if res.get("result") != "success":
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logger.error("Error relaying zephyr:\n%s\n%s" % (zeph, res))
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except Exception:
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logger.exception("Error relaying zephyr:")
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finally:
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os._exit(0)
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|
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def decode_unicode_byte_strings(zeph):
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# type: (Dict[str, Any]) -> Dict[str, str]
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# 'Any' can be of any type of text that is converted to str.
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for field in zeph.keys():
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if isinstance(zeph[field], str):
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try:
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decoded = zeph[field].decode("utf-8")
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except Exception:
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decoded = zeph[field].decode("iso-8859-1")
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zeph[field] = decoded
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return zeph
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|
|
def quit_failed_initialization(message):
|
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# type: (str) -> str
|
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logger.error(message)
|
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maybe_kill_child()
|
|
sys.exit(1)
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|
|
def zephyr_init_autoretry():
|
|
# type: () -> None
|
|
backoff = zulip.RandomExponentialBackoff()
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|
while backoff.keep_going():
|
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try:
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# zephyr.init() tries to clear old subscriptions, and thus
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# sometimes gets a SERVNAK from the server
|
|
zephyr.init()
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backoff.succeed()
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return
|
|
except IOError:
|
|
logger.exception("Error initializing Zephyr library (retrying). Traceback:")
|
|
backoff.fail()
|
|
|
|
quit_failed_initialization("Could not initialize Zephyr library, quitting!")
|
|
|
|
def zephyr_load_session_autoretry(session_path):
|
|
# type: (str) -> None
|
|
backoff = zulip.RandomExponentialBackoff()
|
|
while backoff.keep_going():
|
|
try:
|
|
session = open(session_path, "r").read()
|
|
zephyr._z.initialize()
|
|
zephyr._z.load_session(session)
|
|
zephyr.__inited = True
|
|
return
|
|
except IOError:
|
|
logger.exception("Error loading saved Zephyr session (retrying). Traceback:")
|
|
backoff.fail()
|
|
|
|
quit_failed_initialization("Could not load saved Zephyr session, quitting!")
|
|
|
|
def zephyr_subscribe_autoretry(sub):
|
|
# type: (Tuple[str, str, str]) -> None
|
|
backoff = zulip.RandomExponentialBackoff()
|
|
while backoff.keep_going():
|
|
try:
|
|
zephyr.Subscriptions().add(sub)
|
|
backoff.succeed()
|
|
return
|
|
except IOError:
|
|
# Probably a SERVNAK from the zephyr server, but log the
|
|
# traceback just in case it's something else
|
|
logger.exception("Error subscribing to personals (retrying). Traceback:")
|
|
backoff.fail()
|
|
|
|
quit_failed_initialization("Could not subscribe to personals, quitting!")
|
|
|
|
def zephyr_to_zulip(options):
|
|
# type: (Any) -> None
|
|
if options.use_sessions and os.path.exists(options.session_path):
|
|
logger.info("Loading old session")
|
|
zephyr_load_session_autoretry(options.session_path)
|
|
else:
|
|
zephyr_init_autoretry()
|
|
if options.forward_class_messages:
|
|
update_subscriptions()
|
|
if options.forward_personals:
|
|
# Subscribe to personals; we really can't operate without
|
|
# those subscriptions, so just retry until it works.
|
|
zephyr_subscribe_autoretry(("message", "*", "%me%"))
|
|
zephyr_subscribe_autoretry(("mail", "inbox", "%me%"))
|
|
if options.nagios_class:
|
|
zephyr_subscribe_autoretry((options.nagios_class, "*", "*"))
|
|
if options.use_sessions:
|
|
open(options.session_path, "w").write(zephyr._z.dump_session())
|
|
|
|
if options.logs_to_resend is not None:
|
|
with open(options.logs_to_resend, 'r') as log:
|
|
for ln in log:
|
|
try:
|
|
zeph = json.loads(ln)
|
|
# New messages added to the log shouldn't have any
|
|
# elements of type str (they should already all be
|
|
# unicode), but older messages in the log are
|
|
# still of type str, so convert them before we
|
|
# send the message
|
|
zeph = decode_unicode_byte_strings(zeph)
|
|
# Handle importing older zephyrs in the logs
|
|
# where it isn't called a "stream" yet
|
|
if "class" in zeph:
|
|
zeph["stream"] = zeph["class"]
|
|
if "instance" in zeph:
|
|
zeph["subject"] = zeph["instance"]
|
|
logger.info("sending saved message to %s from %s..." %
|
|
(zeph.get('stream', zeph.get('recipient')),
|
|
zeph['sender']))
|
|
send_zulip(zeph)
|
|
except Exception:
|
|
logger.exception("Could not send saved zephyr:")
|
|
time.sleep(2)
|
|
|
|
logger.info("Successfully initialized; Starting receive loop.")
|
|
|
|
if options.resend_log_path is not None:
|
|
with open(options.resend_log_path, 'a') as log:
|
|
process_loop(log)
|
|
else:
|
|
process_loop(None)
|
|
|
|
def send_zephyr(zwrite_args, content):
|
|
# type: (List[str], str) -> Tuple[int, str]
|
|
p = subprocess.Popen(zwrite_args, stdin=subprocess.PIPE,
|
|
stdout=subprocess.PIPE, stderr=subprocess.PIPE)
|
|
stdout, stderr = p.communicate(input=content.encode("utf-8"))
|
|
if p.returncode:
|
|
logger.error("zwrite command '%s' failed with return code %d:" % (
|
|
" ".join(zwrite_args), p.returncode,))
|
|
if stdout:
|
|
logger.info("stdout: " + stdout) # type: ignore # str + bytes
|
|
elif stderr:
|
|
logger.warning("zwrite command '%s' printed the following warning:" % (
|
|
" ".join(zwrite_args),))
|
|
if stderr:
|
|
logger.warning("stderr: " + stderr) # type: ignore # str + bytes
|
|
return (p.returncode, stderr) # type: ignore # bytes vs str
|
|
|
|
def send_authed_zephyr(zwrite_args, content):
|
|
# type: (List[str], str) -> Tuple[int, str]
|
|
return send_zephyr(zwrite_args, content)
|
|
|
|
def send_unauthed_zephyr(zwrite_args, content):
|
|
# type: (List[str], str) -> Tuple[int, str]
|
|
return send_zephyr(zwrite_args + ["-d"], content)
|
|
|
|
def zcrypt_encrypt_content(zephyr_class, instance, content):
|
|
# type: (str, str, str) -> Optional[str]
|
|
keypath = parse_crypt_table(zephyr_class, instance)
|
|
if keypath is None:
|
|
return None
|
|
|
|
# encrypt the message!
|
|
p = subprocess.Popen(["gpg",
|
|
"--symmetric",
|
|
"--no-options",
|
|
"--no-default-keyring",
|
|
"--keyring=/dev/null",
|
|
"--secret-keyring=/dev/null",
|
|
"--batch",
|
|
"--quiet",
|
|
"--no-use-agent",
|
|
"--armor",
|
|
"--cipher-algo", "AES",
|
|
"--passphrase-file",
|
|
keypath],
|
|
stdin=subprocess.PIPE,
|
|
stdout=subprocess.PIPE,
|
|
stderr=subprocess.PIPE)
|
|
encrypted, _ = p.communicate(input=content) # type: ignore # Optional[bytes] vs string
|
|
return encrypted # type: ignore # bytes, expecting Optional[str]
|
|
|
|
def forward_to_zephyr(message):
|
|
# type: (Dict[str, Any]) -> None
|
|
# 'Any' can be of any type of text
|
|
support_heading = "Hi there! This is an automated message from Zulip."
|
|
support_closing = """If you have any questions, please be in touch through the \
|
|
Feedback button or at support@zulipchat.com."""
|
|
|
|
wrapper = textwrap.TextWrapper(break_long_words=False, break_on_hyphens=False)
|
|
wrapped_content = "\n".join("\n".join(wrapper.wrap(line))
|
|
for line in message["content"].replace("@", "@@").split("\n"))
|
|
|
|
zwrite_args = ["zwrite", "-n", "-s", message["sender_full_name"],
|
|
"-F", "Zephyr error: See http://zephyr.1ts.org/wiki/df",
|
|
"-x", "UTF-8"]
|
|
|
|
# Hack to make ctl's fake username setup work :)
|
|
if message['type'] == "stream" and zulip_account_email == "ctl@mit.edu":
|
|
zwrite_args.extend(["-S", "ctl"])
|
|
|
|
if message['type'] == "stream":
|
|
zephyr_class = message["display_recipient"]
|
|
instance = message["subject"]
|
|
|
|
match_whitespace_instance = re.match(r'^\(instance "(\s*)"\)$', instance)
|
|
if match_whitespace_instance:
|
|
# Forward messages sent to '(instance "WHITESPACE")' back to the
|
|
# appropriate WHITESPACE instance for bidirectional mirroring
|
|
instance = match_whitespace_instance.group(1)
|
|
elif (instance == "instance %s" % (zephyr_class,) or
|
|
instance == "test instance %s" % (zephyr_class,)):
|
|
# Forward messages to e.g. -c -i white-magic back from the
|
|
# place we forward them to
|
|
if instance.startswith("test"):
|
|
instance = zephyr_class
|
|
zephyr_class = "tabbott-test5"
|
|
else:
|
|
instance = zephyr_class
|
|
zephyr_class = "message"
|
|
zwrite_args.extend(["-c", zephyr_class, "-i", instance])
|
|
logger.info("Forwarding message to class %s, instance %s" % (zephyr_class, instance))
|
|
elif message['type'] == "private":
|
|
if len(message['display_recipient']) == 1:
|
|
recipient = to_zephyr_username(message["display_recipient"][0]["email"])
|
|
recipients = [recipient]
|
|
elif len(message['display_recipient']) == 2:
|
|
recipient = ""
|
|
for r in message["display_recipient"]:
|
|
if r["email"].lower() != zulip_account_email.lower():
|
|
recipient = to_zephyr_username(r["email"])
|
|
break
|
|
recipients = [recipient]
|
|
else:
|
|
zwrite_args.extend(["-C"])
|
|
# We drop the @ATHENA.MIT.EDU here because otherwise the
|
|
# "CC: user1 user2 ..." output will be unnecessarily verbose.
|
|
recipients = [to_zephyr_username(user["email"]).replace("@ATHENA.MIT.EDU", "")
|
|
for user in message["display_recipient"]]
|
|
logger.info("Forwarding message to %s" % (recipients,))
|
|
zwrite_args.extend(recipients)
|
|
|
|
if message.get("invite_only_stream"):
|
|
result = zcrypt_encrypt_content(zephyr_class, instance, wrapped_content)
|
|
if result is None:
|
|
send_error_zulip("""%s
|
|
|
|
Your Zulip-Zephyr mirror bot was unable to forward that last message \
|
|
from Zulip to Zephyr because you were sending to a zcrypted Zephyr \
|
|
class and your mirroring bot does not have access to the relevant \
|
|
key (perhaps because your AFS tokens expired). That means that while \
|
|
Zulip users (like you) received it, Zephyr users did not.
|
|
|
|
%s""" % (support_heading, support_closing))
|
|
return
|
|
|
|
# Proceed with sending a zcrypted message
|
|
wrapped_content = result
|
|
zwrite_args.extend(["-O", "crypt"])
|
|
|
|
if options.test_mode:
|
|
logger.debug("Would have forwarded: %s\n%s" %
|
|
(zwrite_args, wrapped_content.encode("utf-8"))) # type: ignore
|
|
# NOTE: mypy indicates %s outputs the encoded wrapped_content as per %r
|
|
return
|
|
|
|
(code, stderr) = send_authed_zephyr(zwrite_args, wrapped_content)
|
|
if code == 0 and stderr == "":
|
|
return
|
|
elif code == 0:
|
|
send_error_zulip("""%s
|
|
|
|
Your last message was successfully mirrored to zephyr, but zwrite \
|
|
returned the following warning:
|
|
|
|
%s
|
|
|
|
%s""" % (support_heading, stderr, support_closing))
|
|
return
|
|
elif code != 0 and (stderr.startswith("zwrite: Ticket expired while sending notice to ") or
|
|
stderr.startswith("zwrite: No credentials cache found while sending notice to ")):
|
|
# Retry sending the message unauthenticated; if that works,
|
|
# just notify the user that they need to renew their tickets
|
|
(code, stderr) = send_unauthed_zephyr(zwrite_args, wrapped_content)
|
|
if code == 0:
|
|
if options.ignore_expired_tickets:
|
|
return
|
|
send_error_zulip("""%s
|
|
|
|
Your last message was forwarded from Zulip to Zephyr unauthenticated, \
|
|
because your Kerberos tickets have expired. It was sent successfully, \
|
|
but please renew your Kerberos tickets in the screen session where you \
|
|
are running the Zulip-Zephyr mirroring bot, so we can send \
|
|
authenticated Zephyr messages for you again.
|
|
|
|
%s""" % (support_heading, support_closing))
|
|
return
|
|
|
|
# zwrite failed and it wasn't because of expired tickets: This is
|
|
# probably because the recipient isn't subscribed to personals,
|
|
# but regardless, we should just notify the user.
|
|
send_error_zulip("""%s
|
|
|
|
Your Zulip-Zephyr mirror bot was unable to forward that last message \
|
|
from Zulip to Zephyr. That means that while Zulip users (like you) \
|
|
received it, Zephyr users did not. The error message from zwrite was:
|
|
|
|
%s
|
|
|
|
%s""" % (support_heading, stderr, support_closing))
|
|
return
|
|
|
|
def maybe_forward_to_zephyr(message):
|
|
# type: (Dict[str, Any]) -> None
|
|
# The key string can be used to direct any type of text.
|
|
if (message["sender_email"] == zulip_account_email):
|
|
if not ((message["type"] == "stream") or
|
|
(message["type"] == "private" and
|
|
False not in [u["email"].lower().endswith("mit.edu") for u in
|
|
message["display_recipient"]])):
|
|
# Don't try forward private messages with non-MIT users
|
|
# to MIT Zephyr.
|
|
return
|
|
timestamp_now = int(time.time())
|
|
if float(message["timestamp"]) < timestamp_now - 15:
|
|
logger.warning("Skipping out of order message: %s < %s" %
|
|
(message["timestamp"], timestamp_now))
|
|
return
|
|
try:
|
|
forward_to_zephyr(message)
|
|
except Exception:
|
|
# Don't let an exception forwarding one message crash the
|
|
# whole process
|
|
logger.exception("Error forwarding message:")
|
|
|
|
def zulip_to_zephyr(options):
|
|
# type: (int) -> None
|
|
# Sync messages from zulip to zephyr
|
|
logger.info("Starting syncing messages.")
|
|
while True:
|
|
try:
|
|
zulip_client.call_on_each_message(maybe_forward_to_zephyr)
|
|
except Exception:
|
|
logger.exception("Error syncing messages:")
|
|
time.sleep(1)
|
|
|
|
def subscribed_to_mail_messages():
|
|
# type: () -> bool
|
|
# In case we have lost our AFS tokens and those won't be able to
|
|
# parse the Zephyr subs file, first try reading in result of this
|
|
# query from the environment so we can avoid the filesystem read.
|
|
stored_result = os.environ.get("HUMBUG_FORWARD_MAIL_ZEPHYRS")
|
|
if stored_result is not None:
|
|
return stored_result == "True"
|
|
for (cls, instance, recipient) in parse_zephyr_subs(verbose=False):
|
|
if (cls.lower() == "mail" and instance.lower() == "inbox"):
|
|
os.environ["HUMBUG_FORWARD_MAIL_ZEPHYRS"] = "True"
|
|
return True
|
|
os.environ["HUMBUG_FORWARD_MAIL_ZEPHYRS"] = "False"
|
|
return False
|
|
|
|
def add_zulip_subscriptions(verbose):
|
|
# type: (bool) -> None
|
|
zephyr_subscriptions = set()
|
|
skipped = set()
|
|
for (cls, instance, recipient) in parse_zephyr_subs(verbose=verbose):
|
|
if cls.lower() == "message":
|
|
if recipient != "*":
|
|
# We already have a (message, *, you) subscription, so
|
|
# these are redundant
|
|
continue
|
|
# We don't support subscribing to (message, *)
|
|
if instance == "*":
|
|
if recipient == "*":
|
|
skipped.add((cls, instance, recipient, "subscribing to all of class message is not supported."))
|
|
continue
|
|
# If you're on -i white-magic on zephyr, get on stream white-magic on zulip
|
|
# instead of subscribing to stream "message" on zulip
|
|
zephyr_subscriptions.add(instance)
|
|
continue
|
|
elif cls.lower() == "mail" and instance.lower() == "inbox":
|
|
# We forward mail zephyrs, so no need to log a warning.
|
|
continue
|
|
elif len(cls) > 60:
|
|
skipped.add((cls, instance, recipient, "Class longer than 60 characters"))
|
|
continue
|
|
elif instance != "*":
|
|
skipped.add((cls, instance, recipient, "Unsupported non-* instance"))
|
|
continue
|
|
elif recipient != "*":
|
|
skipped.add((cls, instance, recipient, "Unsupported non-* recipient."))
|
|
continue
|
|
zephyr_subscriptions.add(cls)
|
|
|
|
if len(zephyr_subscriptions) != 0:
|
|
res = zulip_client.add_subscriptions(list({"name": stream} for stream in zephyr_subscriptions),
|
|
authorization_errors_fatal=False)
|
|
if res.get("result") != "success":
|
|
logger.error("Error subscribing to streams:\n%s" % (res["msg"],))
|
|
return
|
|
|
|
already = res.get("already_subscribed")
|
|
new = res.get("subscribed")
|
|
unauthorized = res.get("unauthorized")
|
|
if verbose:
|
|
if already is not None and len(already) > 0:
|
|
logger.info("\nAlready subscribed to: %s" % (", ".join(list(already.values())[0]),))
|
|
if new is not None and len(new) > 0:
|
|
logger.info("\nSuccessfully subscribed to: %s" % (", ".join(list(new.values())[0]),))
|
|
if unauthorized is not None and len(unauthorized) > 0:
|
|
logger.info("\n" + "\n".join(textwrap.wrap("""\
|
|
The following streams you have NOT been subscribed to,
|
|
because they have been configured in Zulip as invitation-only streams.
|
|
This was done at the request of users of these Zephyr classes, usually
|
|
because traffic to those streams is sent within the Zephyr world encrypted
|
|
via zcrypt (in Zulip, we achieve the same privacy goals through invitation-only streams).
|
|
If you wish to read these streams in Zulip, you need to contact the people who are
|
|
on these streams and already use Zulip. They can subscribe you to them via the
|
|
"streams" page in the Zulip web interface:
|
|
""")) + "\n\n %s" % (", ".join(unauthorized),))
|
|
|
|
if len(skipped) > 0:
|
|
if verbose:
|
|
logger.info("\n" + "\n".join(textwrap.wrap("""\
|
|
You have some lines in ~/.zephyr.subs that could not be
|
|
synced to your Zulip subscriptions because they do not
|
|
use "*" as both the instance and recipient and not one of
|
|
the special cases (e.g. personals and mail zephyrs) that
|
|
Zulip has a mechanism for forwarding. Zulip does not
|
|
allow subscribing to only some subjects on a Zulip
|
|
stream, so this tool has not created a corresponding
|
|
Zulip subscription to these lines in ~/.zephyr.subs:
|
|
""")) + "\n")
|
|
|
|
for (cls, instance, recipient, reason) in skipped:
|
|
if verbose:
|
|
if reason != "":
|
|
logger.info(" [%s,%s,%s] (%s)" % (cls, instance, recipient, reason))
|
|
else:
|
|
logger.info(" [%s,%s,%s]" % (cls, instance, recipient))
|
|
if len(skipped) > 0:
|
|
if verbose:
|
|
logger.info("\n" + "\n".join(textwrap.wrap("""\
|
|
If you wish to be subscribed to any Zulip streams related
|
|
to these .zephyrs.subs lines, please do so via the Zulip
|
|
web interface.
|
|
""")) + "\n")
|
|
|
|
def valid_stream_name(name):
|
|
# type: (str) -> bool
|
|
return name != ""
|
|
|
|
def parse_zephyr_subs(verbose=False):
|
|
# type: (bool) -> Set[Tuple[str, str, str]]
|
|
zephyr_subscriptions = set() # type: Set[Tuple[str, str, str]]
|
|
subs_file = os.path.join(os.environ["HOME"], ".zephyr.subs")
|
|
if not os.path.exists(subs_file):
|
|
if verbose:
|
|
logger.error("Couldn't find ~/.zephyr.subs!")
|
|
return zephyr_subscriptions
|
|
|
|
for line in open(subs_file, "r").readlines():
|
|
line = line.strip()
|
|
if len(line) == 0:
|
|
continue
|
|
try:
|
|
(cls, instance, recipient) = line.split(",")
|
|
cls = cls.replace("%me%", options.user)
|
|
instance = instance.replace("%me%", options.user)
|
|
recipient = recipient.replace("%me%", options.user)
|
|
if not valid_stream_name(cls):
|
|
if verbose:
|
|
logger.error("Skipping subscription to unsupported class name: [%s]" % (line,))
|
|
continue
|
|
except Exception:
|
|
if verbose:
|
|
logger.error("Couldn't parse ~/.zephyr.subs line: [%s]" % (line,))
|
|
continue
|
|
zephyr_subscriptions.add((cls.strip(), instance.strip(), recipient.strip()))
|
|
return zephyr_subscriptions
|
|
|
|
def open_logger():
|
|
# type: () -> logging.Logger
|
|
if options.log_path is not None:
|
|
log_file = options.log_path
|
|
elif options.forward_class_messages:
|
|
if options.test_mode:
|
|
log_file = "/var/log/zulip/test-mirror-log"
|
|
else:
|
|
log_file = "/var/log/zulip/mirror-log"
|
|
else:
|
|
f = tempfile.NamedTemporaryFile(prefix="zulip-log.%s." % (options.user,),
|
|
delete=False)
|
|
log_file = f.name
|
|
# Close the file descriptor, since the logging system will
|
|
# reopen it anyway.
|
|
f.close()
|
|
logger = logging.getLogger(__name__)
|
|
log_format = "%(asctime)s <initial>: %(message)s"
|
|
formatter = logging.Formatter(log_format)
|
|
logging.basicConfig(format=log_format)
|
|
logger.setLevel(logging.DEBUG)
|
|
file_handler = logging.FileHandler(log_file)
|
|
file_handler.setFormatter(formatter)
|
|
logger.addHandler(file_handler)
|
|
return logger
|
|
|
|
def configure_logger(logger, direction_name):
|
|
# type: (logging.Logger, Optional[str]) -> None
|
|
if direction_name is None:
|
|
log_format = "%(message)s"
|
|
else:
|
|
log_format = "%(asctime)s [" + direction_name + "] %(message)s"
|
|
formatter = logging.Formatter(log_format)
|
|
|
|
# Replace the formatters for the file and stdout loggers
|
|
for handler in logger.handlers:
|
|
handler.setFormatter(formatter)
|
|
root_logger = logging.getLogger()
|
|
for handler in root_logger.handlers:
|
|
handler.setFormatter(formatter)
|
|
|
|
def parse_args():
|
|
# type: () -> Tuple[Any, ...]
|
|
parser = optparse.OptionParser()
|
|
parser.add_option('--forward-class-messages',
|
|
default=False,
|
|
help=optparse.SUPPRESS_HELP,
|
|
action='store_true')
|
|
parser.add_option('--shard',
|
|
help=optparse.SUPPRESS_HELP)
|
|
parser.add_option('--noshard',
|
|
default=False,
|
|
help=optparse.SUPPRESS_HELP,
|
|
action='store_true')
|
|
parser.add_option('--resend-log',
|
|
dest='logs_to_resend',
|
|
help=optparse.SUPPRESS_HELP)
|
|
parser.add_option('--enable-resend-log',
|
|
dest='resend_log_path',
|
|
help=optparse.SUPPRESS_HELP)
|
|
parser.add_option('--log-path',
|
|
dest='log_path',
|
|
help=optparse.SUPPRESS_HELP)
|
|
parser.add_option('--stream-file-path',
|
|
dest='stream_file_path',
|
|
default="/home/zulip/public_streams",
|
|
help=optparse.SUPPRESS_HELP)
|
|
parser.add_option('--no-forward-personals',
|
|
dest='forward_personals',
|
|
help=optparse.SUPPRESS_HELP,
|
|
default=True,
|
|
action='store_false')
|
|
parser.add_option('--forward-mail-zephyrs',
|
|
dest='forward_mail_zephyrs',
|
|
help=optparse.SUPPRESS_HELP,
|
|
default=False,
|
|
action='store_true')
|
|
parser.add_option('--no-forward-from-zulip',
|
|
default=True,
|
|
dest='forward_from_zulip',
|
|
help=optparse.SUPPRESS_HELP,
|
|
action='store_false')
|
|
parser.add_option('--verbose',
|
|
default=False,
|
|
help=optparse.SUPPRESS_HELP,
|
|
action='store_true')
|
|
parser.add_option('--sync-subscriptions',
|
|
default=False,
|
|
action='store_true')
|
|
parser.add_option('--ignore-expired-tickets',
|
|
default=False,
|
|
action='store_true')
|
|
parser.add_option('--site',
|
|
default=DEFAULT_SITE,
|
|
help=optparse.SUPPRESS_HELP)
|
|
parser.add_option('--on-startup-command',
|
|
default=None,
|
|
help=optparse.SUPPRESS_HELP)
|
|
parser.add_option('--user',
|
|
default=os.environ["USER"],
|
|
help=optparse.SUPPRESS_HELP)
|
|
parser.add_option('--stamp-path',
|
|
default="/afs/athena.mit.edu/user/t/a/tabbott/for_friends",
|
|
help=optparse.SUPPRESS_HELP)
|
|
parser.add_option('--session-path',
|
|
default=None,
|
|
help=optparse.SUPPRESS_HELP)
|
|
parser.add_option('--nagios-class',
|
|
default=None,
|
|
help=optparse.SUPPRESS_HELP)
|
|
parser.add_option('--nagios-path',
|
|
default=None,
|
|
help=optparse.SUPPRESS_HELP)
|
|
parser.add_option('--use-sessions',
|
|
default=False,
|
|
action='store_true',
|
|
help=optparse.SUPPRESS_HELP)
|
|
parser.add_option('--test-mode',
|
|
default=False,
|
|
help=optparse.SUPPRESS_HELP,
|
|
action='store_true')
|
|
parser.add_option('--api-key-file',
|
|
default=os.path.join(os.environ["HOME"], "Private", ".humbug-api-key"))
|
|
return parser.parse_args()
|
|
|
|
def die_gracefully(signal, frame):
|
|
# type: (int, FrameType) -> None
|
|
if CURRENT_STATE == States.ZulipToZephyr or CURRENT_STATE == States.ChildSending:
|
|
# this is a child process, so we want os._exit (no clean-up necessary)
|
|
os._exit(1)
|
|
|
|
if CURRENT_STATE == States.ZephyrToZulip and not options.use_sessions:
|
|
try:
|
|
# zephyr=>zulip processes may have added subs, so run cancelSubs
|
|
zephyr._z.cancelSubs()
|
|
except IOError:
|
|
# We don't care whether we failed to cancel subs properly, but we should log it
|
|
logger.exception("")
|
|
|
|
sys.exit(1)
|
|
|
|
if __name__ == "__main__":
|
|
# Set the SIGCHLD handler back to SIG_DFL to prevent these errors
|
|
# when importing the "requests" module after being restarted using
|
|
# the restart_stamp functionality:
|
|
#
|
|
# close failed in file object destructor:
|
|
# IOError: [Errno 10] No child processes
|
|
signal.signal(signal.SIGCHLD, signal.SIG_DFL)
|
|
|
|
signal.signal(signal.SIGINT, die_gracefully)
|
|
|
|
# The properties available on 'options' are dynamically
|
|
# determined, so we have to treat it as an Any for type
|
|
# annotations.
|
|
(options, args) = parse_args() # type: Any, List[str]
|
|
|
|
logger = open_logger()
|
|
configure_logger(logger, "parent")
|
|
|
|
# In case this is an automated restart of the mirroring script,
|
|
# and we have lost AFS tokens, first try reading the API key from
|
|
# the environment so that we can skip doing a filesystem read.
|
|
if os.environ.get("HUMBUG_API_KEY") is not None:
|
|
api_key = os.environ.get("HUMBUG_API_KEY")
|
|
else:
|
|
if not os.path.exists(options.api_key_file):
|
|
logger.error("\n" + "\n".join(textwrap.wrap("""\
|
|
Could not find API key file.
|
|
You need to either place your api key file at %s,
|
|
or specify the --api-key-file option.""" % (options.api_key_file,))))
|
|
sys.exit(1)
|
|
api_key = open(options.api_key_file).read().strip()
|
|
# Store the API key in the environment so that our children
|
|
# don't need to read it in
|
|
os.environ["HUMBUG_API_KEY"] = api_key
|
|
|
|
if options.nagios_path is None and options.nagios_class is not None:
|
|
logger.error("\n" + "nagios_path is required with nagios_class\n")
|
|
sys.exit(1)
|
|
|
|
zulip_account_email = options.user + "@mit.edu"
|
|
import zulip
|
|
zulip_client = zulip.Client(
|
|
email=zulip_account_email,
|
|
api_key=api_key,
|
|
verbose=True,
|
|
client="zephyr_mirror",
|
|
site=options.site)
|
|
|
|
start_time = time.time()
|
|
|
|
if options.sync_subscriptions:
|
|
configure_logger(logger, None) # make the output cleaner
|
|
logger.info("Syncing your ~/.zephyr.subs to your Zulip Subscriptions!")
|
|
add_zulip_subscriptions(True)
|
|
sys.exit(0)
|
|
|
|
# Kill all zephyr_mirror processes other than this one and its parent.
|
|
if not options.test_mode:
|
|
pgrep_query = "python.*zephyr_mirror"
|
|
if options.shard is not None:
|
|
# sharded class mirror
|
|
pgrep_query = "%s.*--shard=%s" % (pgrep_query, options.shard)
|
|
elif options.user is not None:
|
|
# Personals mirror on behalf of another user.
|
|
pgrep_query = "%s.*--user=%s" % (pgrep_query, options.user)
|
|
proc = subprocess.Popen(['pgrep', '-U', os.environ["USER"], "-f", pgrep_query],
|
|
stdout=subprocess.PIPE,
|
|
stderr=subprocess.PIPE)
|
|
out, _err_unused = proc.communicate()
|
|
for pid in map(int, out.split()):
|
|
if pid == os.getpid() or pid == os.getppid():
|
|
continue
|
|
|
|
# Another copy of zephyr_mirror.py! Kill it.
|
|
logger.info("Killing duplicate zephyr_mirror process %s" % (pid,))
|
|
try:
|
|
os.kill(pid, signal.SIGINT)
|
|
except OSError:
|
|
# We don't care if the target process no longer exists, so just log the error
|
|
logger.exception("")
|
|
|
|
if options.shard is not None and set(options.shard) != set("a"):
|
|
# The shard that is all "a"s is the one that handles personals
|
|
# forwarding and zulip => zephyr forwarding
|
|
options.forward_personals = False
|
|
options.forward_from_zulip = False
|
|
if options.forward_mail_zephyrs is None:
|
|
options.forward_mail_zephyrs = subscribed_to_mail_messages()
|
|
|
|
if options.session_path is None:
|
|
options.session_path = "/var/tmp/%s" % (options.user,)
|
|
|
|
if options.forward_from_zulip:
|
|
child_pid = os.fork() # type: Optional[int]
|
|
if child_pid == 0:
|
|
CURRENT_STATE = States.ZulipToZephyr
|
|
# Run the zulip => zephyr mirror in the child
|
|
configure_logger(logger, "zulip=>zephyr")
|
|
zulip_to_zephyr(options)
|
|
sys.exit(0)
|
|
else:
|
|
child_pid = None
|
|
CURRENT_STATE = States.ZephyrToZulip
|
|
|
|
import zephyr
|
|
logger_name = "zephyr=>zulip"
|
|
if options.shard is not None:
|
|
logger_name += "(%s)" % (options.shard,)
|
|
configure_logger(logger, logger_name)
|
|
# Have the kernel reap children for when we fork off processes to send Zulips
|
|
signal.signal(signal.SIGCHLD, signal.SIG_IGN)
|
|
zephyr_to_zulip(options)
|