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medium.py
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"""Medium hosted blog implementation.
Medium's API is unsupported and degrading. We should probably sunset this.
Only supports outbound webmentions right now, not inbound, since Medium's API
doesn't support creating responses or recommendations yet.
* https://github.com/Medium/medium-api-docs/issues/71
* https://github.com/Medium/medium-api-docs/issues/72
API docs:
* https://github.com/Medium/medium-api-docs#contents
* https://medium.com/developers/welcome-to-the-medium-api-3418f956552
"""
import collections
import logging
from flask import render_template, request
from google.cloud import ndb
from oauth_dropins import medium as oauth_medium
from oauth_dropins.webutil.util import json_dumps, json_loads
from flask_app import app
import models
import superfeedr
import util
logger = logging.getLogger(__name__)
class Medium(models.Source):
"""A Medium publication or user blog.
The key name is the username (with ``@`` prefix) or publication name.
"""
GR_CLASS = collections.namedtuple('FakeGrClass', ('NAME',))(NAME='Medium')
OAUTH_START = oauth_medium.Start
SHORT_NAME = 'medium'
USERNAME_KEY_ID = True
def is_publication(self):
return not self.key_id().startswith('@')
def feed_url(self):
# https://help.medium.com/hc/en-us/articles/214874118-RSS-Feeds-of-publications-and-profiles
return self.url.replace('medium.com/', 'medium.com/feed/')
def silo_url(self):
return self.url
@staticmethod
def new(auth_entity=None, username=None, **kwargs):
"""Creates and returns a Medium for the logged in user.
Args:
auth_entity (oauth_dropins.medium.MediumAuth):
username (str): either username (starting with ``@``) or publication id
"""
assert username
assert 'id' not in kwargs
medium = Medium(username=username,
auth_entity=auth_entity.key,
superfeedr_secret=util.generate_secret(),
**kwargs)
data = medium._data(auth_entity)
medium.name = data.get('name') or data.get('username')
medium.picture = data.get('imageUrl')
medium.url = data.get('url')
return medium
def verified(self):
return False
def verify(self, force=False):
"""No incoming webmention support yet."""
pass
def has_bridgy_webmention_endpoint(self):
return True
def _data(self, auth_entity):
"""Returns the Medium API object for this user or publication.
https://github.com/Medium/medium-api-docs/#user-content-getting-the-authenticated-users-details
Example user::
{
'imageUrl': 'https://cdn-images-1.medium.com/fit/c/200/200/0*4dsrv3pwIJfFraSz.jpeg',
'url': 'https://medium.com/@snarfed',
'name': 'Ryan Barrett',
'username': 'snarfed',
'id': '113863a5ca2ab60671e8c9fe089e59c07acbf8137c51523605dc55528516c0d7e'
}
Example publication::
{
'id': 'b45573563f5a',
'name': 'Developers',
'description': "Medium's Developer resources",
'url': 'https://medium.com/developers',
'imageUrl': 'https://cdn-images-1.medium.com/fit/c/200/200/1*ccokMT4VXmDDO1EoQQHkzg@2x.png'
}
"""
id = self.username.lstrip('@')
user = json_loads(auth_entity.user_json).get('data')
if user.get('username').lstrip('@') == id:
return user
for pub in json_loads(auth_entity.publications_json).get('data', []):
if pub.get('id') == id:
return pub
def urls_and_domains(self, auth_entity, user_url):
if self.url:
return [self.url], [util.domain_from_link(self.url)]
return [], []
@app.route('/medium/add', methods=['POST'])
def medium_add():
auth_entity = ndb.Key(urlsafe=request.values['auth_entity_key']).get()
util.maybe_add_or_delete_source(Medium, auth_entity, request.values['state'],
username=request.values['blog'])
class ChooseBlog(oauth_medium.Callback):
def finish(self, auth_entity, state=None):
if not auth_entity:
util.maybe_add_or_delete_source(Medium, auth_entity, state)
return
user = json_loads(auth_entity.user_json)['data']
username = user['username']
if not username.startswith('@'):
username = '@' + username
# fetch publications this user contributes or subscribes to.
# (sadly medium's API doesn't tell us the difference unless we fetch each
# pub's metadata separately.)
# https://github.com/Medium/medium-api-docs/#user-content-listing-the-users-publications
auth_entity.publications_json = auth_entity.get(
oauth_medium.API_BASE + f'users/{user["id"]}/publications').text
auth_entity.put()
pubs = json_loads(auth_entity.publications_json).get('data')
if not pubs:
util.maybe_add_or_delete_source(Medium, auth_entity, state,
username=username)
return
# add user profile to start of pubs list
user['id'] = username
pubs.insert(0, user)
vars = {
'action': '/medium/add',
'state': state,
'auth_entity_key': auth_entity.key.urlsafe().decode(),
'blogs': [{
'id': p['id'],
'title': p.get('name', ''),
'url': p.get('url', ''),
'pretty_url': util.pretty_link(str(p.get('url', ''))),
'image': p.get('imageUrl', ''),
} for p in pubs if p.get('id')],
}
logger.info(f'Rendering choose_blog.html with {vars}')
return render_template('choose_blog.html', **vars)
class SuperfeedrNotify(superfeedr.Notify):
SOURCE_CLS = Medium
# https://github.com/Medium/medium-api-docs#user-content-21-browser-based-authentication
start = util.oauth_starter(oauth_medium.Start).as_view(
'medium_start', '/medium/choose_blog', scopes=('basicProfile', 'listPublications'))
app.add_url_rule('/medium/start', view_func=start, methods=['POST'])
app.add_url_rule('/medium/choose_blog', view_func=ChooseBlog.as_view(
'medium_choose_blog', 'unused to_path'), methods=['GET'])
app.add_url_rule('/medium/delete/finish', view_func=oauth_medium.Callback.as_view(
'medium_delete', '/delete/finish')),
app.add_url_rule('/medium/notify/<id>', view_func=SuperfeedrNotify.as_view('medium_notify'), methods=['POST'])