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2f4b62048e
This cuts the MIT Zephyr home page load time and also #subscriptions database-sourced load time for me from about a second to about 50ms on my laptop. The home page still takes about 600ms to load due to templating. (imported from commit 1cfd8c750301abe6b6a881be4b2857532be947ec)
452 lines
18 KiB
Python
452 lines
18 KiB
Python
from django.conf import settings
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from django.contrib.auth.models import User
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from zephyr.lib.context_managers import lockfile
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from zephyr.models import Realm, Stream, UserProfile, UserActivity, \
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Subscription, Recipient, Message, UserMessage, \
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DefaultStream, StreamColor, UserPresence, \
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MAX_MESSAGE_LENGTH, get_client, get_display_recipient, get_stream
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from django.db import transaction, IntegrityError
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from zephyr.lib.initial_password import initial_password
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from zephyr.lib.cache import cache_with_key
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from zephyr.lib.timestamp import timestamp_to_datetime, datetime_to_timestamp
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from zephyr.lib.message_cache import cache_save_message
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from zephyr.lib.queue import SimpleQueueClient
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from django.utils import timezone
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from django.contrib.auth.models import UserManager
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import subprocess
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import simplejson
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import time
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import traceback
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import re
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import requests
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import hashlib
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import base64
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import datetime
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import os
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import platform
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from os import path
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# Store an event in the log for re-importing messages
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def log_event(event):
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if "timestamp" not in event:
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event["timestamp"] = time.time()
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if not path.exists(settings.EVENT_LOG_DIR):
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os.mkdir(settings.EVENT_LOG_DIR)
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template = path.join(settings.EVENT_LOG_DIR,
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'%s.' + platform.node()
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+ datetime.datetime.now().strftime('.%Y-%m-%d'))
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with lockfile(template % ('lock',)):
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with open(template % ('events',), 'a') as log:
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log.write(simplejson.dumps(event) + '\n')
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# create_user_hack is the same as Django's User.objects.create_user,
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# except that we don't save to the database so it can used in
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# bulk_creates
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def create_user_hack(username, password, email, active):
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now = timezone.now()
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email = UserManager.normalize_email(email)
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user = User(username=username, email=email,
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is_staff=False, is_active=active, is_superuser=False,
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last_login=now, date_joined=now)
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if active:
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user.set_password(password)
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else:
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user.set_unusable_password()
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return user
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def create_user_base(email, password, active=True):
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# NB: the result of Base32 + truncation is not a valid Base32 encoding.
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# It's just a unique alphanumeric string.
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# Use base32 instead of base64 so we don't have to worry about mixed case.
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# Django imposes a limit of 30 characters on usernames.
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email_hash = hashlib.sha256(settings.HASH_SALT + email).digest()
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username = base64.b32encode(email_hash)[:30]
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return create_user_hack(username, password, email, active)
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def create_user(email, password, realm, full_name, short_name,
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active=True):
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user = create_user_base(email=email, password=password,
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active=active)
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user.save()
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return UserProfile.create(user, realm, full_name, short_name)
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def do_create_user(email, password, realm, full_name, short_name,
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active=True):
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log_event({'type': 'user_created',
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'timestamp': time.time(),
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'full_name': full_name,
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'short_name': short_name,
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'user': email,
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'domain': realm.domain})
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return create_user(email, password, realm, full_name, short_name, active)
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def do_change_user_email(user, new_email):
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old_email = user.email
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user.email = new_email
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user.save()
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log_event({'type': 'user_email_changed',
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'old_email': old_email,
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'new_email': new_email})
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def compute_mit_user_fullname(email):
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try:
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# Input is either e.g. starnine@mit.edu or user|CROSSREALM.INVALID@mit.edu
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match_user = re.match(r'^([a-zA-Z0-9_.-]+)(\|.+)?@mit\.edu$', email.lower())
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if match_user and match_user.group(2) is None:
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dns_query = "%s.passwd.ns.athena.mit.edu" % (match_user.group(1),)
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proc = subprocess.Popen(['host', '-t', 'TXT', dns_query],
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stdout=subprocess.PIPE,
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stderr=subprocess.PIPE)
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out, _err_unused = proc.communicate()
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if proc.returncode == 0:
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# Parse e.g. 'starnine:*:84233:101:Athena Consulting Exchange User,,,:/mit/starnine:/bin/bash'
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# for the 4th passwd entry field, aka the person's name.
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hesiod_name = out.split(':')[4].split(',')[0].strip()
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if hesiod_name == "":
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return email
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return hesiod_name
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elif match_user:
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return match_user.group(1).lower() + "@" + match_user.group(2).upper()[1:]
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except:
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print ("Error getting fullname for %s:" % (email,))
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traceback.print_exc()
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return email.lower()
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@transaction.commit_on_success
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def create_mit_user_if_needed(realm, email):
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try:
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return UserProfile.objects.get(user__email=email)
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except UserProfile.DoesNotExist:
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try:
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# Forge a user for this person
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return create_user(email, initial_password(email), realm,
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compute_mit_user_fullname(email), email.split("@")[0],
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active=False)
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except IntegrityError:
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# Unless we raced with another thread doing the same
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# thing, in which case we should get the user they made
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transaction.commit()
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return UserProfile.objects.get(user__email=email)
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def log_message(message):
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if not message.sending_client.name.startswith("test:"):
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log_event(message.to_log_dict())
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user_hash = {}
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def get_user_profile_by_id(uid):
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if uid in user_hash:
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return user_hash[uid]
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return UserProfile.objects.select_related().get(id=uid)
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def do_send_message(message, no_log=False):
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# Log the message to our message log for populate_db to refill
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if not no_log:
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log_message(message)
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if message.recipient.type == Recipient.PERSONAL:
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recipients = list(set([get_user_profile_by_id(message.recipient.type_id),
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get_user_profile_by_id(message.sender_id)]))
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# For personals, you send out either 1 or 2 copies of the message, for
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# personals to yourself or to someone else, respectively.
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assert((len(recipients) == 1) or (len(recipients) == 2))
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elif (message.recipient.type == Recipient.STREAM or
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message.recipient.type == Recipient.HUDDLE):
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recipients = [s.user_profile for
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s in Subscription.objects.select_related().filter(recipient=message.recipient, active=True)]
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else:
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raise ValueError('Bad recipient type')
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# Save the message receipts in the database
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# TODO: Use bulk_create here
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with transaction.commit_on_success():
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message.save()
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for user_profile in recipients:
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# Only deliver messages to "active" user accounts
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if user_profile.user.is_active:
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UserMessage(user_profile=user_profile, message=message).save()
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cache_save_message(message)
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# We can only publish messages to longpolling clients if the Tornado server is running.
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if settings.TORNADO_SERVER:
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# Render Markdown etc. here and store (automatically) in
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# memcached, so that the single-threaded Tornado server
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# doesn't have to.
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message.to_dict(apply_markdown=True)
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message.to_dict(apply_markdown=False)
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data = dict(
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secret = settings.SHARED_SECRET,
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message = message.id,
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users = simplejson.dumps([str(user.id) for user in recipients]))
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if message.recipient.type == Recipient.STREAM:
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# Note: This is where authorization for single-stream
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# get_updates happens! We only attach stream data to the
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# notify_new_message request if it's a public stream,
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# ensuring that in the tornado server, non-public stream
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# messages are only associated to their subscribed users.
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stream = Stream.objects.get(id=message.recipient.type_id)
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if stream.is_public():
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data['realm_id'] = stream.realm.id
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data['stream_name'] = stream.name
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requests.post(settings.TORNADO_SERVER + '/notify_new_message', data=data)
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def create_stream_if_needed(realm, stream_name, invite_only=False):
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(stream, created) = Stream.objects.get_or_create(
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realm=realm, name__iexact=stream_name,
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defaults={'name': stream_name, 'invite_only': invite_only})
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if created:
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Recipient.objects.create(type_id=stream.id, type=Recipient.STREAM)
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return stream, created
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def internal_send_message(sender_email, recipient_type, recipient,
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subject, content):
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if len(content) > MAX_MESSAGE_LENGTH:
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content = content[0:3900] + "\n\n[message was too long and has been truncated]"
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message = Message()
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message.sender = UserProfile.objects.get(user__email=sender_email)
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if recipient_type == Recipient.STREAM:
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stream, _ = create_stream_if_needed(message.sender.realm, recipient)
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type_id = stream.id
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else:
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type_id = UserProfile.objects.get(user__email=recipient).id
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message.recipient = Recipient.objects.get(type_id=type_id, type=recipient_type)
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message.subject = subject
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message.content = content
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message.pub_date = timezone.now()
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message.sending_client = get_client("Internal")
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do_send_message(message)
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def do_add_subscription(user_profile, stream, no_log=False):
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recipient = Recipient.objects.get(type_id=stream.id,
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type=Recipient.STREAM)
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(subscription, created) = Subscription.objects.get_or_create(
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user_profile=user_profile, recipient=recipient,
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defaults={'active': True})
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did_subscribe = created
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if not subscription.active:
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did_subscribe = True
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subscription.active = True
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subscription.save()
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if did_subscribe and not no_log:
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log_event({'type': 'subscription_added',
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'user': user_profile.user.email,
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'name': stream.name,
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'domain': stream.realm.domain})
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return did_subscribe
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def do_remove_subscription(user_profile, stream, no_log=False):
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recipient = Recipient.objects.get(type_id=stream.id,
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type=Recipient.STREAM)
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maybe_sub = Subscription.objects.filter(user_profile=user_profile,
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recipient=recipient)
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if len(maybe_sub) == 0:
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return False
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subscription = maybe_sub[0]
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did_remove = subscription.active
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subscription.active = False
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subscription.save()
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if did_remove and not no_log:
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log_event({'type': 'subscription_removed',
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'user': user_profile.user.email,
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'name': stream.name,
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'domain': stream.realm.domain})
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return did_remove
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def log_subscription_property_change(user_email, property, property_dict):
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event = {'type': 'subscription_property',
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'property': property,
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'user': user_email}
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event.update(property_dict)
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log_event(event)
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def do_activate_user(user, log=True, join_date=timezone.now()):
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user.is_active = True
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user.set_password(initial_password(user.email))
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user.date_joined = join_date
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user.save()
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if log:
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domain = UserProfile.objects.get(user=user).realm.domain
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log_event({'type': 'user_activated',
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'user': user.email,
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'domain': domain})
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def do_change_password(user, password, log=True, commit=True):
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user.set_password(password)
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if commit:
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user.save()
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if log:
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log_event({'type': 'user_change_password',
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'user': user.email,
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'pwhash': user.password})
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def do_change_full_name(user_profile, full_name, log=True):
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user_profile.full_name = full_name
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user_profile.save()
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if log:
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log_event({'type': 'user_change_full_name',
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'user': user_profile.user.email,
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'full_name': full_name})
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def do_create_realm(domain, replay=False):
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realm, created = Realm.objects.get_or_create(domain=domain)
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if created and not replay:
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# Log the event
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log_event({"type": "realm_created",
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"domain": domain})
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# Sent a notification message
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message = Message()
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message.sender = UserProfile.objects.get(user__email="humbug+signups@humbughq.com")
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stream, _ = create_stream_if_needed(message.sender.realm, "signups")
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message.recipient = Recipient.objects.get(type_id=stream.id, type=Recipient.STREAM)
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message.subject = domain
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message.content = "Signups enabled."
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message.pub_date = timezone.now()
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message.sending_client = get_client("Internal")
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do_send_message(message)
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return (realm, created)
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def do_change_enable_desktop_notifications(user_profile, enable_desktop_notifications, log=True):
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user_profile.enable_desktop_notifications = enable_desktop_notifications
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user_profile.save()
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if log:
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log_event({'type': 'enable_desktop_notifications_changed',
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'user': user_profile.user.email,
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'enable_desktop_notifications': enable_desktop_notifications})
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def set_default_streams(realm, stream_names):
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DefaultStream.objects.filter(realm=realm).delete()
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for stream_name in stream_names:
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stream, _ = create_stream_if_needed(realm, stream_name)
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DefaultStream.objects.create(stream=stream, realm=realm)
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def add_default_subs(user_profile):
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for default in DefaultStream.objects.filter(realm=user_profile.realm):
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do_add_subscription(user_profile, default.stream)
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@transaction.commit_on_success
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def do_update_user_activity(user_profile, client, query, log_time):
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try:
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(activity, created) = UserActivity.objects.get_or_create(
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user_profile = user_profile,
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client = client,
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query = query,
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defaults={'last_visit': log_time, 'count': 0})
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except IntegrityError:
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transaction.commit()
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activity = UserActivity.objects.get(user_profile = user_profile,
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client = client,
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query = query)
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activity.count += 1
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activity.last_visit = log_time
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activity.save()
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def process_user_activity_event(event):
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user_profile = UserProfile.objects.get(id=event["user_profile_id"])
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client = get_client(event["client"])
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log_time = timestamp_to_datetime(event["time"])
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query = event["query"]
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return do_update_user_activity(user_profile, client, query, log_time)
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@transaction.commit_on_success
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def do_update_user_presence(user_profile, client, log_time, status):
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try:
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(presence, created) = UserPresence.objects.get_or_create(
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user_profile = user_profile,
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client = client,
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defaults = {'timestamp': log_time})
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except IntegrityError:
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transaction.commit()
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presence = UserPresence.objects.get(user_profile = user_profile,
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client = client)
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presence.timestamp = log_time
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presence.status = status
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presence.save()
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if settings.USING_RABBITMQ or settings.TEST_SUITE:
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# RabbitMQ is required for idle functionality
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if settings.USING_RABBITMQ:
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presence_queue = SimpleQueueClient()
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def update_user_presence(user_profile, client, log_time, status):
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event={'user_profile_id': user_profile.id,
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'status': status,
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'time': datetime_to_timestamp(log_time),
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'client': client.name}
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if settings.USING_RABBITMQ:
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presence_queue.json_publish("user_presence", event)
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elif settings.TEST_SUITE:
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process_user_presence_event(event)
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else:
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update_user_presence = lambda user_profile, client, log_time, status: None
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def process_user_presence_event(event):
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user_profile = UserProfile.objects.get(id=event["user_profile_id"])
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client = get_client(event["client"])
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log_time = timestamp_to_datetime(event["time"])
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status = event["status"]
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return do_update_user_presence(user_profile, client, log_time, status)
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def subscribed_to_stream(user_profile, stream):
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try:
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if Subscription.objects.get(user_profile=user_profile,
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active=True,
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recipient__type=Recipient.STREAM,
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recipient__type_id=stream.id):
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return True
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return False
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except Subscription.DoesNotExist:
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return False
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def gather_subscriptions(user_profile):
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# This is a little awkward because the StreamColor table has foreign keys
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# to Subscription, but not vice versa, and not all Subscriptions have a
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# StreamColor.
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#
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# We could do this with a single OUTER JOIN query but Django's ORM does
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# not provide a simple way to specify one.
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# For now, don't display the subscription for your ability to receive personals.
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subs = Subscription.objects.filter(
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user_profile = user_profile,
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active = True,
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recipient__type = Recipient.STREAM)
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with_color = StreamColor.objects.filter(subscription__in = subs).select_related()
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no_color = subs.exclude(id__in = with_color.values('subscription_id')).select_related()
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stream_ids = [sc.subscription.recipient.type_id for sc in with_color] + \
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[sub.recipient.type_id for sub in no_color]
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stream_hash = {}
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for stream in Stream.objects.filter(id__in=stream_ids):
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stream_hash[stream.id] = (stream.name, stream.invite_only)
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result = []
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for sc in with_color:
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(stream_name, invite_only) = stream_hash[sc.subscription.recipient.type_id]
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result.append({'name': stream_name,
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'in_home_view': sc.subscription.in_home_view,
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'invite_only': invite_only,
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'color': sc.color})
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for sub in no_color:
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(stream_name, invite_only) = stream_hash[sub.recipient.type_id]
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result.append({'name': stream_name,
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'in_home_view': sub.in_home_view,
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'invite_only': invite_only,
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'color': StreamColor.DEFAULT_STREAM_COLOR})
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return sorted(result)
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