mirror of
https://github.com/bookwyrm-social/bookwyrm.git
synced 2024-10-02 16:22:04 +00:00
135 lines
4.4 KiB
Python
135 lines
4.4 KiB
Python
''' api utilties '''
|
|
from base64 import b64encode
|
|
from Crypto.PublicKey import RSA
|
|
from Crypto.Signature import pkcs1_15
|
|
from Crypto.Hash import SHA256
|
|
from datetime import datetime
|
|
import json
|
|
import requests
|
|
from urllib.parse import urlparse
|
|
|
|
from fedireads import models
|
|
from fedireads import incoming
|
|
from fedireads.settings import DOMAIN
|
|
|
|
|
|
def get_or_create_remote_user(actor):
|
|
''' look up a remote user or add them '''
|
|
try:
|
|
return models.User.objects.get(actor=actor)
|
|
except models.User.DoesNotExist:
|
|
pass
|
|
|
|
# TODO: also bring in the user's prevous reviews and books
|
|
|
|
# load the user's info from the actor url
|
|
response = requests.get(
|
|
actor,
|
|
headers={'Accept': 'application/activity+json'}
|
|
)
|
|
if not response.ok:
|
|
response.raise_for_status()
|
|
data = response.json()
|
|
|
|
# the webfinger format for the username.
|
|
# TODO: get the user's domain in a better way
|
|
actor_parts = urlparse(actor)
|
|
username = '%s@%s' % (actor_parts.path.split('/')[-1], actor_parts.netloc)
|
|
shared_inbox = data.get('endpoints').get('sharedInbox') if \
|
|
data.get('endpoints') else None
|
|
|
|
try:
|
|
user = models.User.objects.create_user(
|
|
username,
|
|
'', '', # email and passwords are left blank
|
|
actor=actor,
|
|
name=data.get('name'),
|
|
summary=data.get('summary'),
|
|
inbox=data['inbox'], #fail if there's no inbox
|
|
outbox=data['outbox'], # fail if there's no outbox
|
|
shared_inbox=shared_inbox,
|
|
# TODO: probably shouldn't bother to store this for remote users
|
|
public_key=data.get('publicKey').get('publicKeyPem'),
|
|
local=False
|
|
)
|
|
except KeyError:
|
|
return False
|
|
return user
|
|
|
|
|
|
def get_recipients(user, post_privacy, direct_recipients=None):
|
|
''' deduplicated list of recipient inboxes '''
|
|
recipients = direct_recipients or []
|
|
if post_privacy == 'direct':
|
|
# all we care about is direct_recipients, not followers
|
|
return recipients
|
|
|
|
# load all the followers of the user who is sending the message
|
|
followers = user.followers.all()
|
|
if post_privacy == 'public':
|
|
# post to public shared inboxes
|
|
shared_inboxes = set(u.shared_inbox for u in followers)
|
|
recipients += list(shared_inboxes)
|
|
# TODO: not every user has a shared inbox
|
|
# TODO: direct to anyone who's mentioned
|
|
if post_privacy == 'followers':
|
|
# don't send it to the shared inboxes
|
|
inboxes = set(u.inbox for u in followers)
|
|
recipients += list(inboxes)
|
|
return recipients
|
|
|
|
|
|
def broadcast(sender, activity, recipients):
|
|
''' send out an event '''
|
|
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 '''
|
|
# TODO: handle http[s] with regex
|
|
inbox_fragment = sender.inbox.replace('https://%s' % DOMAIN, '')
|
|
now = datetime.utcnow().isoformat()
|
|
signature_headers = [
|
|
'(request-target): post %s' % inbox_fragment,
|
|
'host: https://%s' % DOMAIN,
|
|
'date: %s' % now
|
|
]
|
|
message_to_sign = '\n'.join(signature_headers)
|
|
|
|
# TODO: raise an error if the user doesn't have a private key
|
|
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,
|
|
'Host': 'https://%s' % DOMAIN,
|
|
'Content-Type': 'application/activity+json; charset=utf-8',
|
|
},
|
|
)
|
|
if not response.ok:
|
|
response.raise_for_status()
|
|
incoming.handle_response(response)
|
|
|