forked from mirrors/bookwyrm
102 lines
3.3 KiB
Python
102 lines
3.3 KiB
Python
''' send out activitypub messages '''
|
|
import json
|
|
from urllib.parse import urlparse
|
|
from base64 import b64encode
|
|
from Crypto.PublicKey import RSA
|
|
from Crypto.Signature import pkcs1_15
|
|
from Crypto.Hash import SHA256
|
|
from django.utils.http import http_date
|
|
import requests
|
|
|
|
from fedireads import models
|
|
from fedireads.tasks import app
|
|
|
|
|
|
def get_public_recipients(user, software=None):
|
|
''' everybody and their public inboxes '''
|
|
followers = user.followers.filter(local=False)
|
|
if software:
|
|
# TODO: eventually we may want to handle particular software differently
|
|
followers = followers.filter(fedireads_user=(software == 'fedireads'))
|
|
|
|
# we want shared inboxes when available
|
|
shared = followers.filter(
|
|
shared_inbox__isnull=False
|
|
).values_list('shared_inbox', flat=True).distinct()
|
|
|
|
# if a user doesn't have a shared inbox, we need their personal inbox
|
|
# iirc pixelfed doesn't have shared inboxes
|
|
inboxes = followers.filter(
|
|
shared_inbox__isnull=True
|
|
).values_list('inbox', flat=True)
|
|
|
|
return list(shared) + list(inboxes)
|
|
|
|
|
|
def broadcast(sender, activity, software=None, \
|
|
privacy='public', direct_recipients=None):
|
|
''' send out an event '''
|
|
# start with parsing the direct recipients
|
|
recipients = [u.inbox for u in direct_recipients or []]
|
|
# and then add any other recipients
|
|
# TODO: other kinds of privacy
|
|
if privacy == 'public':
|
|
recipients += get_public_recipients(sender, software=software)
|
|
broadcast_task.delay(sender.id, activity, recipients)
|
|
|
|
|
|
@app.task
|
|
def broadcast_task(sender_id, activity, recipients):
|
|
''' the celery task for broadcast '''
|
|
sender = models.User.objects.get(id=sender_id)
|
|
errors = []
|
|
for recipient in recipients:
|
|
try:
|
|
sign_and_send(sender, activity, recipient)
|
|
except requests.exceptions.HTTPError as e:
|
|
# TODO: maybe keep track of users who cause errors
|
|
errors.append({
|
|
'error': e,
|
|
'recipient': recipient,
|
|
'activity': activity,
|
|
})
|
|
return errors
|
|
|
|
|
|
def sign_and_send(sender, activity, destination):
|
|
''' crpyto whatever and http junk '''
|
|
inbox_parts = urlparse(destination)
|
|
now = http_date()
|
|
signature_headers = [
|
|
'(request-target): post %s' % inbox_parts.path,
|
|
'host: %s' % inbox_parts.netloc,
|
|
'date: %s' % now
|
|
]
|
|
message_to_sign = '\n'.join(signature_headers)
|
|
|
|
if not sender.private_key:
|
|
# this shouldn't happen. it would be bad if it happened.
|
|
raise ValueError('No private key found for sender')
|
|
signer = pkcs1_15.new(RSA.import_key(sender.private_key))
|
|
signed_message = signer.sign(SHA256.new(message_to_sign.encode('utf8')))
|
|
|
|
signature = {
|
|
'keyId': '%s#main-key' % sender.actor,
|
|
'algorithm': 'rsa-sha256',
|
|
'headers': '(request-target) host date',
|
|
'signature': b64encode(signed_message).decode('utf8'),
|
|
}
|
|
signature = ','.join('%s="%s"' % (k, v) for (k, v) in signature.items())
|
|
|
|
response = requests.post(
|
|
destination,
|
|
data=json.dumps(activity),
|
|
headers={
|
|
'Date': now,
|
|
'Signature': signature,
|
|
'Content-Type': 'application/activity+json; charset=utf-8',
|
|
},
|
|
)
|
|
if not response.ok:
|
|
response.raise_for_status()
|
|
return response
|