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https://github.com/Mikaela/Limnoria.git
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eaf7222509
This is much cheaper both for us and the host if the host doesn't support activitypub at all (which is what happens most of the time).
404 lines
14 KiB
Python
404 lines
14 KiB
Python
###
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# Copyright (c) 2020, Valentin Lorentz
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions are met:
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#
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# * Redistributions of source code must retain the above copyright notice,
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# this list of conditions, and the following disclaimer.
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# * Redistributions in binary form must reproduce the above copyright notice,
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# this list of conditions, and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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# * Neither the name of the author of this software nor the name of
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# contributors to this software may be used to endorse or promote products
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# derived from this software without specific prior written consent.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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# POSSIBILITY OF SUCH DAMAGE.
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###
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import re
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import json
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import importlib
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import urllib.parse
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from supybot import utils, callbacks, httpserver
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from supybot.commands import urlSnarfer, wrap
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from supybot.i18n import PluginInternationalization
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from . import activitypub as ap
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importlib.reload(ap)
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_ = PluginInternationalization("Fediverse")
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_username_regexp = re.compile("@(?P<localuser>[^@ ]+)@(?P<hostname>[^@ ]+)")
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class FediverseHttp(httpserver.SupyHTTPServerCallback):
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name = "minimal ActivityPub server"
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defaultResponse = _(
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"""
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You shouldn't be here, this subfolder is not for you. Go back to the
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index and try out other plugins (if any)."""
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)
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def doGetOrHead(self, handler, path, write_content):
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if path == "/instance_actor":
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self.instance_actor(write_content)
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else:
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assert False, repr(path)
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def doWellKnown(self, handler, path):
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actor_url = ap.get_instance_actor_url()
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instance_hostname = urllib.parse.urlsplit(actor_url).hostname
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instance_account = "acct:%s@%s" % (
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instance_hostname,
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instance_hostname,
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)
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if path == "/webfinger?resource=%s" % instance_account:
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headers = {"Content-Type": "application/jrd+json"}
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content = {
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"subject": instance_account,
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"links": [
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{
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"rel": "self",
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"type": "application/activity+json",
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"href": actor_url,
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}
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],
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}
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return (200, headers, json.dumps(content).encode())
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else:
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return None
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def instance_actor(self, write_content):
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self.send_response(200)
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self.send_header("Content-type", ap.ACTIVITY_MIMETYPE)
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self.end_headers()
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if not write_content:
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return
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pem = ap.get_public_key_pem()
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actor_url = ap.get_instance_actor_url()
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hostname = urllib.parse.urlparse(actor_url).hostname
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actor = {
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"@context": [
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"https://www.w3.org/ns/activitystreams",
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"https://w3id.org/security/v1",
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],
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"id": actor_url,
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"preferredUsername": hostname,
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"type": "Service",
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"publicKey": {
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"id": actor_url + "#main-key",
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"owner": actor_url,
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"publicKeyPem": pem.decode(),
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},
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"inbox": actor_url + "/inbox",
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}
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self.wfile.write(json.dumps(actor).encode())
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class Fediverse(callbacks.PluginRegexp):
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"""Fetches information from ActivityPub servers."""
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threaded = True
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regexps = ["usernameSnarfer", "urlSnarfer_"]
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callBefore = ("Web",)
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def __init__(self, irc):
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super().__init__(irc)
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self._startHttp()
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self._actor_cache = utils.structures.TimeoutDict(timeout=600)
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# Used when snarfing, to cheaply avoid querying non-ActivityPub
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# servers.
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# Is also written to when using commands that successfully find
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# ActivityPub data.
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self._webfinger_support_cache = utils.structures.TimeoutDict(
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timeout=60 * 60 * 24
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)
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def _startHttp(self):
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callback = FediverseHttp()
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callback._plugin = self
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httpserver.hook("fediverse", callback)
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def die(self):
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self._stopHttp()
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super().die()
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def _stopHttp(self):
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httpserver.unhook("fediverse")
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def _has_webfinger_support(self, hostname):
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if hostname not in self._webfinger_support_cache:
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self._webfinger_support_cache[hostname] = ap.has_webfinger_support(
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hostname
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)
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return self._webfinger_support_cache[hostname]
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def _get_actor(self, irc, username):
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if username in self._actor_cache:
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return self._actor_cache[username]
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match = _username_regexp.match(username)
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if match:
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localuser = match.group("localuser")
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hostname = match.group("hostname")
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try:
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actor = ap.get_actor(localuser, hostname)
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except ap.ActorNotFound:
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irc.error("Unknown user %s." % username, Raise=True)
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else:
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match = utils.web.urlRe.match(username)
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if match:
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# TODO: error handling
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actor = ap.get_resource_from_url(match.group(0))
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try:
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hostname = urllib.parse.urlparse(actor.get("id")).hostname
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username = "@%s@%s" % (
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hostname,
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actor.get["preferredUsername"],
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)
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except Exception:
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username = None
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else:
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irc.errorInvalid("fediverse username", username)
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if username:
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self._actor_cache[username] = actor
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self._webfinger_support_cache[hostname] = True
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self._actor_cache[actor["id"]] = actor
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return actor
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def _format_actor_fullname(self, actor):
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try:
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hostname = urllib.parse.urlparse(actor.get("id")).hostname
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except Exception:
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hostname = "<unknown>"
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username = actor.get("preferredUsername", "<unknown>")
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name = actor.get("name", username)
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return "\x02%s\x02 (@%s@%s)" % (name, username, hostname)
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def _format_status(self, irc, msg, status):
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if status["type"] == "Create":
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return self._format_status(irc, msg, status["object"])
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elif status["type"] == "Note":
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author_url = status["attributedTo"]
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try:
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author = self._get_actor(irc, author_url)
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except ap.ActivityPubError as e:
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author_fullname = _("<error: %s>") % str(e)
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else:
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author_fullname = self._format_actor_fullname(author)
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cw = status.get("summary")
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if cw:
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if self.registryValue(
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"format.statuses.showContentWithCW",
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msg.channel,
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irc.network,
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):
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# show CW and content
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return _("%s: \x02[CW %s]\x02 %s") % (
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author_fullname,
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cw,
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utils.web.htmlToText(status["content"]),
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)
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else:
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# show CW but not content
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return _("%s: CW %s") % (author_fullname, cw)
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else:
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# no CW, show content
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return _("%s: %s") % (
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author_fullname,
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utils.web.htmlToText(status["content"]),
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)
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elif status["type"] == "Announce":
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# aka boost; let's go fetch the original status
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try:
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content = ap.signed_request(
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status["object"], headers={"Accept": ap.ACTIVITY_MIMETYPE}
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)
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status = json.loads(content.decode())
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return self._format_status(irc, msg, status)
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except ap.ActivityPubProtocolError as e:
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return "<Could not fetch status: %s>" % e.args[0]
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else:
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assert False, "Unknown status type %s: %r" % (
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status["type"],
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status,
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)
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@wrap(["somethingWithoutSpaces"])
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def profile(self, irc, msg, args, username):
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"""<@user@instance>
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Returns generic information on the account @user@instance."""
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actor = self._get_actor(irc, username)
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irc.reply(
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_("%s: %s")
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% (
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self._format_actor_fullname(actor),
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utils.web.htmlToText(actor["summary"]),
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)
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)
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def _format_profile(self, irc, msg, actor):
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return _("%s: %s") % (
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self._format_actor_fullname(actor),
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utils.web.htmlToText(actor["summary"]),
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)
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def usernameSnarfer(self, irc, msg, match):
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if callbacks.addressed(irc, msg):
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return
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if not self.registryValue(
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"snarfers.username", msg.channel, irc.network
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):
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return
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if not self._has_webfinger_support(match.group("hostname")):
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self.log.debug(
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"Not snarfing, host doesn't have Webfinger support."
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)
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return
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try:
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actor = self._get_actor(irc, match.group(0))
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except ap.ActivityPubError as e:
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self.log.info("Could not fetch %s: %s", match.group(0), e)
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# Be silent on errors
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return
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irc.reply(self._format_profile(irc, msg, actor))
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usernameSnarfer.__doc__ = _username_regexp.pattern
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@urlSnarfer
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def urlSnarfer_(self, irc, msg, match):
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channel = msg.channel
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network = irc.network
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url = match.group(0)
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if not channel:
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return
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if callbacks.addressed(irc, msg):
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return
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snarf_profile = self.registryValue(
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"snarfers.profile", channel, network
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)
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snarf_status = self.registryValue("snarfers.status", channel, network)
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if not snarf_profile and not snarf_status:
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return
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hostname = urllib.parse.urlparse(url).hostname
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if not self._has_webfinger_support(hostname):
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self.log.debug(
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"Not snarfing, host doesn't have Webfinger support."
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)
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return
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try:
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resource = ap.get_resource_from_url(url)
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except ap.ActivityPubError:
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return
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try:
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if snarf_profile and resource["type"] in ("Person", "Service"):
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irc.reply(self._format_profile(irc, msg, resource))
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elif snarf_status and resource["type"] in (
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"Create",
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"Note",
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"Announce",
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):
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irc.reply(self._format_status(irc, msg, resource))
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except ap.ActivityPubError:
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return
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urlSnarfer_.__doc__ = utils.web._httpUrlRe
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@wrap(["somethingWithoutSpaces"])
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def featured(self, irc, msg, args, username):
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"""<@user@instance>
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Returnes the featured statuses of @user@instance (aka. pinned toots).
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"""
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actor = self._get_actor(irc, username)
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if "featured" not in actor:
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irc.reply(_("No featured statuses."))
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return
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statuses = json.loads(
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ap.signed_request(actor["featured"]).decode()
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).get("orderedItems", [])
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if not statuses:
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irc.reply(_("No featured statuses."))
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return
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irc.replies(
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filter(
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bool,
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(self._format_status(irc, msg, status) for status in statuses),
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)
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)
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@wrap(["somethingWithoutSpaces"])
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def statuses(self, irc, msg, args, username):
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"""<@user@instance>
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Returned the last statuses of @user@instance.
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"""
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actor = self._get_actor(irc, username)
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if "outbox" not in actor:
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irc.error(_("No status."), Raise=True)
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outbox = json.loads(ap.signed_request(actor["outbox"]).decode())
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# Fetches the first page of the outbox. This should be a good-enough
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# approximation of the number of statuses to show.
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statuses = json.loads(ap.signed_request(outbox["first"]).decode()).get(
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"orderedItems", []
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)
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irc.replies(
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filter(
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bool,
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(self._format_status(irc, msg, status) for status in statuses),
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)
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)
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@wrap(["url"])
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def status(self, irc, msg, args, url):
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"""<url>
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Shows the content of the status at <url>.
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"""
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try:
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status = ap.get_resource_from_url(url)
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except ap.ActivityPubError as e:
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irc.error(_("Could not get status: %s") % e.args[0], Raise=True)
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else:
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hostname = urllib.parse.urlparse(url).hostname
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self._webfinger_support_cache[hostname] = True
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irc.reply(self._format_status(irc, msg, status))
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Class = Fediverse
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# vim:set shiftwidth=4 softtabstop=4 expandtab textwidth=79:
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