mirror of https://gitlab.com/bashrc2/epicyon
640 lines
22 KiB
Python
640 lines
22 KiB
Python
__filename__ = "webfinger.py"
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__author__ = "Bob Mottram"
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__license__ = "AGPL3+"
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__version__ = "1.5.0"
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__maintainer__ = "Bob Mottram"
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__email__ = "bob@libreserver.org"
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__status__ = "Production"
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__module_group__ = "ActivityPub"
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import os
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import urllib.parse
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from session import get_json
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from session import get_json_valid
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from cache import store_webfinger_in_cache
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from cache import get_webfinger_from_cache
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from utils import get_url_from_post
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from utils import remove_html
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from utils import acct_handle_dir
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from utils import get_attachment_property_value
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from utils import get_full_domain
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from utils import load_json
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from utils import load_json_onionify
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from utils import save_json
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from utils import get_protocol_prefixes
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from utils import remove_domain_port
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from utils import get_user_paths
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from utils import get_group_paths
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from utils import local_actor_url
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from utils import get_nickname_from_actor
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from utils import get_domain_from_actor
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def _parse_handle(handle: str) -> (str, str, bool):
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"""Parses a handle and returns nickname and domain
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"""
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group_account = False
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if '.' not in handle:
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return None, None, False
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prefixes = get_protocol_prefixes()
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handle_str = handle
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for prefix in prefixes:
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handle_str = handle_str.replace(prefix, '')
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# try domain/@nick
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if '/@' in handle and '/@/' not in handle:
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domain, nickname = handle_str.split('/@')
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return nickname, domain, False
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# try nick@domain
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if '@' in handle:
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if handle.startswith('!'):
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handle = handle[1:]
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group_account = True
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nickname, domain = handle.split('@')
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return nickname, domain, group_account
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# try for different /users/ paths
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users_paths = get_user_paths()
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group_paths = get_group_paths()
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for possible_users_path in users_paths:
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if possible_users_path not in handle:
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continue
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if possible_users_path in group_paths:
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group_account = True
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domain, nickname = handle_str.split(possible_users_path)
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return nickname, domain, group_account
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return None, None, False
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def webfinger_handle(session, handle: str, http_prefix: str,
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cached_webfingers: {},
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from_domain: str, project_version: str,
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debug: bool, group_account: bool,
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signing_priv_key_pem: str) -> {}:
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"""Gets webfinger result for the given ActivityPub handle
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NOTE: in earlier implementations group_account modified the acct prefix.
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This has been left in, because currently there is still no consensus
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about how groups should be implemented.
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"""
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if not session:
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print('WARN: No session specified for webfinger_handle')
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return None
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nickname, domain, _ = _parse_handle(handle)
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if not nickname:
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print('WARN: No nickname found in handle ' + handle)
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return None
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wf_domain = remove_domain_port(domain)
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wf_handle = nickname + '@' + wf_domain
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if debug:
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print('Parsed webfinger handle: ' + handle + ' -> ' + wf_handle)
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wfg = get_webfinger_from_cache(wf_handle, cached_webfingers)
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if wfg:
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if debug:
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print('Webfinger from cache: ' + str(wfg))
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return wfg
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url = http_prefix + '://' + domain + '/.well-known/webfinger'
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hdr = {
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'Accept': 'application/jrd+json'
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}
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par = {
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'resource': 'acct:' + wf_handle
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}
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try:
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result = \
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get_json(signing_priv_key_pem, session, url, hdr, par,
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debug, project_version, http_prefix, from_domain)
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except BaseException as ex:
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print('ERROR: webfinger_handle ' + wf_handle + ' ' + str(ex))
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return None
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# if the first attempt fails then try specifying the webfinger
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# resource in a different way
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if not get_json_valid(result):
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resource = handle
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if handle == wf_handle:
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# reconstruct the actor
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resource = http_prefix + '://' + wf_domain + '/users/' + nickname
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# try again using the actor as the resource
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# See https://datatracker.ietf.org/doc/html/rfc7033 section 4.5
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par = {
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'resource': resource
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}
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try:
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result = \
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get_json(signing_priv_key_pem, session, url, hdr, par,
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debug, project_version, http_prefix, from_domain)
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except BaseException as ex:
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print('ERROR: webfinger_handle ' + wf_handle + ' ' + str(ex))
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return None
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if get_json_valid(result):
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store_webfinger_in_cache(wf_handle, result, cached_webfingers)
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else:
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print("WARN: Unable to webfinger " + str(url) + ' ' +
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'from_domain: ' + str(from_domain) + ' ' +
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'nickname: ' + str(nickname) + ' ' +
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'handle: ' + str(handle) + ' ' +
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'wf_handle: ' + wf_handle + ' ' +
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'domain: ' + wf_domain + ' ' +
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'headers: ' + str(hdr) + ' ' +
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'params: ' + str(par))
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return result
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def store_webfinger_endpoint(nickname: str, domain: str, port: int,
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base_dir: str, wf_json: {}) -> bool:
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"""Stores webfinger endpoint for a user to a file
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"""
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original_domain = domain
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domain = get_full_domain(domain, port)
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handle = nickname + '@' + domain
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wf_subdir = '/wfendpoints'
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if not os.path.isdir(base_dir + wf_subdir):
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os.mkdir(base_dir + wf_subdir)
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filename = base_dir + wf_subdir + '/' + handle + '.json'
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save_json(wf_json, filename)
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if nickname == 'inbox':
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handle = original_domain + '@' + domain
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filename = base_dir + wf_subdir + '/' + handle + '.json'
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save_json(wf_json, filename)
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return True
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def create_webfinger_endpoint(nickname: str, domain: str, port: int,
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http_prefix: str) -> {}:
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"""Creates a webfinger endpoint for a user
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NOTE: in earlier implementations group_account modified the acct prefix.
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This has been left in, because currently there is still no consensus
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about how groups should be implemented.
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"""
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original_domain = domain
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domain = get_full_domain(domain, port)
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person_name = nickname
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person_id = local_actor_url(http_prefix, person_name, domain)
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subject_str = "acct:" + person_name + "@" + original_domain
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profile_page_href = http_prefix + "://" + domain + "/@" + nickname
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if nickname in ('inbox', original_domain):
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person_name = 'actor'
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person_id = http_prefix + "://" + domain + "/" + person_name
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subject_str = "acct:" + original_domain + "@" + original_domain
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profile_page_href = http_prefix + '://' + domain + \
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'/about/more?instance_actor=true'
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person_link = http_prefix + "://" + domain + "/@" + person_name
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blog_url = http_prefix + "://" + domain + "/blog/" + person_name
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account = {
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"aliases": [
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person_link,
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person_id
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],
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"links": [
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{
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"href": person_link + "/avatar.png",
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"rel": "http://webfinger.net/rel/avatar",
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"type": "image/png"
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},
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{
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"href": blog_url,
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"rel": "http://webfinger.net/rel/blog"
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},
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{
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"href": profile_page_href,
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"rel": "http://webfinger.net/rel/profile-page",
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"type": "text/html"
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},
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{
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"href": profile_page_href,
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"rel": "http://webfinger.net/rel/profile-page",
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"type": "text/vcard"
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},
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{
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"href": person_id,
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"rel": "self",
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"type": "application/activity+json"
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}
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],
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"subject": subject_str
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}
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return account
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def webfinger_node_info(http_prefix: str, domain_full: str) -> {}:
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""" /.well-known/nodeinfo endpoint
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https://codeberg.org/fediverse/fep/src/branch/main/fep/2677/fep-2677.md
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"""
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instance_url = http_prefix + '://' + domain_full
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nodeinfo = {
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'links': [
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{
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'rel': 'http://nodeinfo.diaspora.software/ns/schema/2.0',
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'href': instance_url + '/nodeinfo/2.0'
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},
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{
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"rel": "https://www.w3.org/ns/activitystreams#Application",
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"href": instance_url + '/actor'
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}
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]
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}
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return nodeinfo
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def webfinger_meta(http_prefix: str, domain_full: str) -> str:
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"""Return /.well-known/host-meta
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"""
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meta_str = \
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"<?xml version=’1.0' encoding=’UTF-8'?>" + \
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"<XRD xmlns=’http://docs.oasis-open.org/ns/xri/xrd-1.0'" + \
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" xmlns:hm=’http://host-meta.net/xrd/1.0'>" + \
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"" + \
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"<hm:Host>" + domain_full + "</hm:Host>" + \
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"" + \
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"<Link rel=’lrdd’" + \
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" template=’" + http_prefix + "://" + domain_full + \
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"/describe?uri={uri}'>" + \
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" <Title>Resource Descriptor</Title>" + \
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" </Link>" + \
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"</XRD>"
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return meta_str
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def wellknown_protocol_handler(path: str, http_prefix: str,
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domain_full: str) -> ({}, str):
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"""See https://fedi-to.github.io/protocol-handler.html
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"""
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if not path.startswith('/.well-known/protocol-handler?'):
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return None, None
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if 'target=' in path:
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path = urllib.parse.unquote(path)
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target = path.split('target=')[1]
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if ';' in target:
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target = target.split(';')[0]
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if not target:
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return None, None
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if not target.startswith('web+epicyon:') and \
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not target.startswith('web+mastodon:') and \
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not target.startswith('web+ap:'):
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return None, None
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handle = target.split(':', 1)[1].strip()
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if handle.startswith('//'):
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handle = handle[2:]
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if handle.startswith('@'):
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handle = handle[1:]
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if '@' in handle:
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nickname = handle.split('@')[0]
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domain_and_path = handle.split('@')[1]
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else:
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nickname = handle
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domain_and_path = domain_full
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# not an open redirect
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if domain_and_path.startswith(domain_full):
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command = ''
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if '/' in nickname:
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command = nickname.split('/')[0]
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nickname = nickname.split('/')[1]
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domain_length = len(domain_full)
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path_str = domain_and_path[domain_length:]
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return http_prefix + '://' + domain_full + \
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'/users/' + nickname + path_str, command
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return None, None
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def webfinger_lookup(path: str, base_dir: str,
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domain: str, onion_domain: str, i2p_domain: str,
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port: int, debug: bool) -> {}:
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"""Lookup the webfinger endpoint for an account
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GET /.well-known/webfinger?resource=acct:user@domain
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"""
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if not path.startswith('/.well-known/webfinger?'):
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return None
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handle = None
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res_type = 'acct'
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if 'resource=' + res_type + ':http' in path:
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# GET /.well-known/webfinger?resource=acct:https://domain/users/nick
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actor = path.split('resource=' + res_type + ':')[1]
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actor = urllib.parse.unquote(actor.strip())
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wf_nickname = get_nickname_from_actor(actor)
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wf_domain, port = get_domain_from_actor(actor)
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if wf_nickname and wf_domain:
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handle = wf_nickname + '@' + wf_domain
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if debug:
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print('DEBUG: WEBFINGER handle ' + handle)
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elif 'resource=' + res_type + ':' in path:
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# GET /.well-known/webfinger?resource=acct:nick@domain
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handle = path.split('resource=' + res_type + ':')[1].strip()
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handle = urllib.parse.unquote(handle)
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if debug:
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print('DEBUG: WEBFINGER handle ' + handle)
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elif 'resource=' + res_type + '%3Ahttp' in path:
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# GET /.well-known/webfinger?resource=acct%3Ahttps://domain/users/nick
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actor = path.split('resource=' + res_type + '%3A')[1]
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actor = urllib.parse.unquote(actor.strip())
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wf_nickname = get_nickname_from_actor(actor)
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wf_domain, port = get_domain_from_actor(actor)
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if wf_nickname and wf_domain:
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handle = wf_nickname + '@' + wf_domain
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if debug:
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print('DEBUG: WEBFINGER handle ' + handle)
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elif 'resource=' + res_type + '%3A' in path:
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# GET /.well-known/webfinger?resource=acct%3Anick@domain
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handle = path.split('resource=' + res_type + '%3A')[1]
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handle = urllib.parse.unquote(handle.strip())
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if debug:
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print('DEBUG: WEBFINGER handle ' + handle)
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elif 'resource=http' in path:
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# GET /.well-known/webfinger?resource=https://domain/users/nick
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actor = path.split('resource=')[1]
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actor = urllib.parse.unquote(actor.strip())
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wf_nickname = get_nickname_from_actor(actor)
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wf_domain, port = get_domain_from_actor(actor)
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if wf_nickname and wf_domain:
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handle = wf_nickname + '@' + wf_domain
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if debug:
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print('DEBUG: WEBFINGER handle ' + handle)
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elif res_type + '=' in path:
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possible_handle = path.split(res_type + '=')[1]
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if '@' in possible_handle:
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if possible_handle.startswith('@'):
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possible_handle = possible_handle[1:]
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if '@' in possible_handle:
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possible_handle = possible_handle.strip()
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wf_nickname = possible_handle.split('@')[0]
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wf_domain = possible_handle.split('@')[1]
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if wf_nickname and wf_domain:
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handle = wf_nickname + '@' + wf_domain
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elif '%3A' in possible_handle or '/' in possible_handle:
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actor = urllib.parse.unquote(possible_handle.strip())
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wf_nickname = get_nickname_from_actor(actor)
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wf_domain, port = get_domain_from_actor(actor)
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if wf_nickname and wf_domain:
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handle = wf_nickname + '@' + wf_domain
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if debug:
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print('DEBUG: WEBFINGER handle ' + handle)
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if not handle:
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if debug:
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print('DEBUG: WEBFINGER handle missing')
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return None
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if '&' in handle:
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handle = handle.split('&')[0].strip()
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print('DEBUG: WEBFINGER handle with & removed ' + handle)
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if '@' not in handle:
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if debug:
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print('DEBUG: WEBFINGER no @ in handle ' + handle)
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return None
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handle = get_full_domain(handle, port)
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# convert @domain@domain to inbox@domain
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if '@' in handle:
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handle_domain = handle.split('@')[1]
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if handle.startswith(handle_domain + '@'):
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handle = 'inbox@' + handle_domain
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# if this is a lookup for a handle using its onion domain
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# then swap the onion domain for the clearnet version
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onionify = False
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if onion_domain:
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if onion_domain in handle:
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handle = handle.replace(onion_domain, domain)
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onionify = True
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i2pify = False
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if i2p_domain:
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if i2p_domain in handle:
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handle = handle.replace(i2p_domain, domain)
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i2pify = True
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# instance actor
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if handle.startswith('actor@'):
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handle = handle.replace('actor@', 'inbox@', 1)
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elif handle.startswith('Actor@'):
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handle = handle.replace('Actor@', 'inbox@', 1)
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filename = base_dir + '/wfendpoints/' + handle + '.json'
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if debug:
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print('DEBUG: WEBFINGER filename ' + filename)
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if not os.path.isfile(filename):
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if debug:
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print('DEBUG: WEBFINGER filename not found ' + filename)
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return None
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if not onionify and not i2pify:
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wf_json = load_json(filename)
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elif onionify:
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print('Webfinger request for onionified ' + handle)
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wf_json = load_json_onionify(filename, domain, onion_domain)
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else:
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print('Webfinger request for i2pified ' + handle)
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wf_json = load_json_onionify(filename, domain, i2p_domain)
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if not wf_json:
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wf_json = {"nickname": "unknown"}
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return wf_json
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def _webfinger_update_avatar(wf_json: {}, actor_json: {}) -> bool:
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"""Updates the avatar image link
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"""
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found = False
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url_str = get_url_from_post(actor_json['icon']['url'])
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avatar_url = remove_html(url_str)
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media_type = actor_json['icon']['mediaType']
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for link in wf_json['links']:
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if not link.get('rel'):
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continue
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if not link['rel'].endswith('://webfinger.net/rel/avatar'):
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continue
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found = True
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if link['href'] != avatar_url or link['type'] != media_type:
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link['href'] = avatar_url
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link['type'] = media_type
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return True
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break
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if found:
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return False
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wf_json['links'].append({
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"href": avatar_url,
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"rel": "http://webfinger.net/rel/avatar",
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"type": media_type
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})
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return True
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def _webfinger_update_vcard(wf_json: {}, actor_json: {}) -> bool:
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"""Updates the vcard link
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"""
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for link in wf_json['links']:
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if link.get('type'):
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if link['type'] == 'text/vcard':
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return False
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url_str = get_url_from_post(actor_json['url'])
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actor_url = remove_html(url_str)
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wf_json['links'].append({
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"href": actor_url,
|
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"rel": "http://webfinger.net/rel/profile-page",
|
||
"type": "text/vcard"
|
||
})
|
||
return True
|
||
|
||
|
||
def _webfinger_add_blog_link(wf_json: {}, actor_json: {}) -> bool:
|
||
"""Adds a blog link to webfinger if needed
|
||
"""
|
||
found = False
|
||
if '/users/' in actor_json['id']:
|
||
blog_url = \
|
||
actor_json['id'].split('/users/')[0] + '/blog/' + \
|
||
actor_json['id'].split('/users/')[1]
|
||
else:
|
||
blog_url = \
|
||
actor_json['id'].split('/@')[0] + '/blog/' + \
|
||
actor_json['id'].split('/@')[1]
|
||
for link in wf_json['links']:
|
||
if not link.get('rel'):
|
||
continue
|
||
if not link['rel'].endswith('://webfinger.net/rel/blog'):
|
||
continue
|
||
found = True
|
||
if link['href'] != blog_url:
|
||
link['href'] = blog_url
|
||
return True
|
||
break
|
||
if found:
|
||
return False
|
||
wf_json['links'].append({
|
||
"href": blog_url,
|
||
"rel": "http://webfinger.net/rel/blog"
|
||
})
|
||
return True
|
||
|
||
|
||
def _webfinger_updateFromProfile(wf_json: {}, actor_json: {}) -> bool:
|
||
"""Updates webfinger Email/blog/xmpp links from profile
|
||
Returns true if one or more tags has been changed
|
||
"""
|
||
if not actor_json.get('attachment'):
|
||
return False
|
||
|
||
changed = False
|
||
|
||
webfinger_property_name = {
|
||
"xmpp": "xmpp",
|
||
"matrix": "matrix",
|
||
"email": "mailto",
|
||
"ssb": "ssb",
|
||
"briar": "briar",
|
||
"cwtch": "cwtch",
|
||
"tox": "toxId"
|
||
}
|
||
|
||
aliases_not_found = []
|
||
for name, alias in webfinger_property_name.items():
|
||
aliases_not_found.append(alias)
|
||
|
||
for property_value in actor_json['attachment']:
|
||
name_value = None
|
||
if property_value.get('name'):
|
||
name_value = property_value['name']
|
||
elif property_value.get('schema:name'):
|
||
name_value = property_value['schema:name']
|
||
if not name_value:
|
||
continue
|
||
property_name = name_value.lower()
|
||
found = False
|
||
for name, alias in webfinger_property_name.items():
|
||
if name == property_name:
|
||
if alias in aliases_not_found:
|
||
aliases_not_found.remove(alias)
|
||
found = True
|
||
break
|
||
if not found:
|
||
continue
|
||
if not property_value.get('type'):
|
||
continue
|
||
prop_value_name, _ = \
|
||
get_attachment_property_value(property_value)
|
||
if not prop_value_name:
|
||
continue
|
||
if not property_value['type'].endswith('PropertyValue'):
|
||
continue
|
||
|
||
new_value = property_value[prop_value_name].strip()
|
||
if '://' in new_value:
|
||
new_value = new_value.split('://')[1]
|
||
|
||
alias_index = 0
|
||
found = False
|
||
for alias in wf_json['aliases']:
|
||
if alias.startswith(webfinger_property_name[property_name] + ':'):
|
||
found = True
|
||
break
|
||
alias_index += 1
|
||
new_alias = webfinger_property_name[property_name] + ':' + new_value
|
||
if found:
|
||
if wf_json['aliases'][alias_index] != new_alias:
|
||
changed = True
|
||
wf_json['aliases'][alias_index] = new_alias
|
||
else:
|
||
wf_json['aliases'].append(new_alias)
|
||
changed = True
|
||
|
||
# remove any aliases which are no longer in the actor profile
|
||
remove_alias = []
|
||
for alias in aliases_not_found:
|
||
for full_alias in wf_json['aliases']:
|
||
if full_alias.startswith(alias + ':'):
|
||
remove_alias.append(full_alias)
|
||
for full_alias in remove_alias:
|
||
wf_json['aliases'].remove(full_alias)
|
||
changed = True
|
||
|
||
if _webfinger_update_avatar(wf_json, actor_json):
|
||
changed = True
|
||
|
||
if _webfinger_update_vcard(wf_json, actor_json):
|
||
changed = True
|
||
|
||
if _webfinger_add_blog_link(wf_json, actor_json):
|
||
changed = True
|
||
|
||
return changed
|
||
|
||
|
||
def webfinger_update(base_dir: str, nickname: str, domain: str,
|
||
onion_domain: str, i2p_domain: str,
|
||
cached_webfingers: {}) -> None:
|
||
"""Regenerates stored webfinger
|
||
"""
|
||
handle = nickname + '@' + domain
|
||
wf_subdir = '/wfendpoints'
|
||
if not os.path.isdir(base_dir + wf_subdir):
|
||
return
|
||
|
||
filename = base_dir + wf_subdir + '/' + handle + '.json'
|
||
onionify = False
|
||
i2pify = False
|
||
if onion_domain:
|
||
if onion_domain in handle:
|
||
handle = handle.replace(onion_domain, domain)
|
||
onionify = True
|
||
elif i2p_domain:
|
||
if i2p_domain in handle:
|
||
handle = handle.replace(i2p_domain, domain)
|
||
i2pify = True
|
||
if not onionify:
|
||
if not i2pify:
|
||
wf_json = load_json(filename)
|
||
else:
|
||
wf_json = load_json_onionify(filename, domain, i2p_domain)
|
||
else:
|
||
wf_json = load_json_onionify(filename, domain, onion_domain)
|
||
if not wf_json:
|
||
return
|
||
|
||
actor_filename = acct_handle_dir(base_dir, handle) + '.json'
|
||
actor_json = load_json(actor_filename)
|
||
if not actor_json:
|
||
return
|
||
|
||
if _webfinger_updateFromProfile(wf_json, actor_json):
|
||
if save_json(wf_json, filename):
|
||
store_webfinger_in_cache(handle, wf_json, cached_webfingers)
|