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# This is a simple python flask implementation of 'How To Implement A Basic ActivityPub Server'
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# https://blog.joinmastodon.org/2018/06/how-to-implement-a-basic-activitypub-server/
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# © 2018 homebrewserver.club contributors
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <https://www.gnu.org/licenses/>.
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import flask
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import os
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import requests
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import base64
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import json
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from flask import request
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from flask import Response
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from time import strftime, gmtime
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from Crypto.Hash import SHA256
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from Crypto.Signature import pkcs1_15
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from Crypto.PublicKey import RSA
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from httpsig import HTTPSigAuth
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from key import Key, get_key
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#
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import logging
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import http.client as http_client
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http_client.HTTPConnection.debuglevel = 1
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logging.basicConfig()
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logging.getLogger().setLevel(logging.DEBUG)
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requests_log = logging.getLogger("requests.packages.urllib3")
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requests_log.setLevel(logging.DEBUG)
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requests_log.propagate = True
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#
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#Config
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DOMAIN = 'https://my-example.com'
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USERNAME = 'alice'
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key = get_key(f'{DOMAIN}/users/{USERNAME}') #generate keypair on first launch
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#Flask
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app = flask.Flask(__name__)
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@app.route('/')
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def index():
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return 'It works! Now try to look for a user@my-example.com via the mastodon interface'
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@app.route('/.well-known/webfinger')
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def finger():
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"""
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Respond to webfinger queries (GET /.well-known/webfinger?resource=acct:alice@my-example.com) with a json object pointing to the actor
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see templates/webfinger.json
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"""
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if request.args.get('resource'):
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query = request.args.get('resource')
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actor = query.split(':')[1].split('@')[0] # from 'acct:alice@my-example.com' to 'alice'
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json = flask.render_template('webfinger.json', query=query, actor=actor, domain=DOMAIN) # render our ActivityPub answer
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return Response(response=json, status=200, mimetype="application/json") # return that answer as a json object
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@app.route('/users/<actor>')
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def profile(actor):
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"""
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Return an Actor object
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see templates/actor.json
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"""
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key = get_key(f'{DOMAIN}/users/{actor}')
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publicKeyPem = key.to_dict()['publicKeyPem']
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publicKeyPem = publicKeyPem.replace('\n','\\n') #public key shouldn't contain verbatim linebreaks in json
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json = flask.render_template('actor.json', preferred_username=USERNAME, actor=actor, domain=DOMAIN, public_key=publicKeyPem) # render our ActivityPub answer
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return Response(response=json, status=200, mimetype="application/json") # return that answer as a json object
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@app.route('/post/', methods=['POST','GET'])
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def post():
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#key = get_key(f'{DOMAIN}/users/{USERNAME}')
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headers = {"content-type": "application/activity+json",
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"user-agent": f"Basic AP v: 0.0"}
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activity=json.loads(flask.render_template('create.json',
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domain=DOMAIN, actor=USERNAME))
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http_sig = HTTPSigAuth(key, headers)
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url = 'https://post.lurk.org/inbox'
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body = json.dumps(activity)
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headers = http_sig.sign(url,body)
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r = requests.post(url, json=body, headers=headers)
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html = f'Status code <pre>{r.status_code}</pre></br>Response Headers: <pre>{r.headers}</pre></br></br> json message: <pre>{r.request.body}</pre></br></br> Request headers: <pre>{r.request.headers}</pre>'
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html_headers = f'<html><head><style>pre {{overflow:auto;background-color:#eee;}}</style></head><body>{html}</body></html>'
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return html_headers
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if __name__ == '__main__':
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app.debug =True
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app.run()
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