1 # Fedi API Block - An aggregator for fetching blocking data from fediverse nodes
2 # Copyright (C) 2023 Free Software Foundation
4 # This program is free software: you can redistribute it and/or modify
5 # it under the terms of the GNU Affero General Public License as published
6 # by the Free Software Foundation, either version 3 of the License, or
7 # (at your option) any later version.
9 # This program is distributed in the hope that it will be useful,
10 # but WITHOUT ANY WARRANTY; without even the implied warranty of
11 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 # GNU Affero General Public License for more details.
14 # You should have received a copy of the GNU Affero General Public License
15 # along with this program. If not, see <https://www.gnu.org/licenses/>.
21 from fba import database
24 from fba.helpers import blacklist
25 from fba.helpers import config
26 from fba.helpers import domain as domain_helper
27 from fba.helpers import tidyup
29 from fba.http import network
30 from fba.http import nodeinfo
32 from fba.models import blocks
33 from fba.models import instances
35 logging.basicConfig(level=logging.INFO)
36 logger = logging.getLogger(__name__)
38 # Language mapping X -> English
41 "filtered media" : "filtered_media",
42 "limited servers" : "followers_only",
43 "followers-only" : "followers_only",
44 "media removal" : "media_removal",
45 "media_removal" : "media_removal",
46 "media force-set as sensitive": "media_nsfw",
47 "nsfw" : "media_nsfw",
49 "suspended servers": "reject",
50 "silenced servers" : "silenced",
51 "removal from \"the whole known network\" timeline": "federated_timeline_removal",
54 def fetch_blocks(domain: str) -> list:
55 logger.debug("domain='%s' - CALLED!", domain)
56 domain_helper.raise_on(domain)
58 if blacklist.is_blacklisted(domain):
59 raise Exception(f"domain='{domain}' is blacklisted but function is invoked.")
60 elif not instances.is_registered(domain):
61 raise Exception(f"domain='{domain}' is not registered but function is invoked.")
67 logger.debug("Fetching nodeinfo: domain='%s'", domain)
68 rows = nodeinfo.fetch(domain, update_mode=False)
70 if "error_message" in rows:
71 logger.warning("Error message '%s' during fetching nodeinfo for domain='%s'", rows["error_message"], domain)
72 instances.set_last_error(domain, rows)
73 instances.update(domain)
75 logger.debug("Returning empty list ... - EXIT!")
77 elif "exception" in rows:
78 logger.warning("Exception '%s' during fetching nodeinfo for domain='%s' - EXIT!", type(rows["exception"]), domain)
81 logger.debug("rows[json] found for domain='%s'", domain)
84 except network.exceptions as exception:
85 logger.warning("Exception '%s' during fetching nodeinfo from domain='%s'", type(exception), domain)
86 instances.set_last_error(domain, exception)
89 logger.warning("Could not fetch nodeinfo from domain='%s' - EXIT!", domain)
91 elif "metadata" not in rows:
92 logger.warning("rows()=%d does not have key 'metadata', domain='%s' - EXIT!", len(rows), domain)
94 elif "federation" not in rows["metadata"]:
95 logger.warning("rows()=%d does not have key 'federation', domain='%s' - EXIT!", len(rows["metadata"]), domain)
98 data = rows["metadata"]["federation"]
101 logger.debug("data[]='%s'", type(data))
102 if "mrf_simple" in data:
103 logger.debug("Found mrf_simple in API response from domain='%s'", domain)
105 for block_level, blocklist in (
107 **data["mrf_simple"],
109 "quarantined_instances": data["quarantined_instances"]
113 logger.debug("block_level='%s', blocklist()=%d", block_level, len(blocklist))
114 block_level = tidyup.domain(block_level) if block_level != "" else None
115 logger.debug("block_level='%s' - AFTER!", block_level)
117 if block_level == "":
118 logger.warning("block_level is now empty!")
120 elif block_level == "accept":
121 logger.debug("domain='%s' skipping block_level='accept'", domain)
124 block_level = blocks.alias_block_level(block_level)
126 logger.debug("Checking %d entries from domain='%s',block_level='%s' ...", len(blocklist), domain, block_level)
127 if len(blocklist) > 0:
128 for blocked in blocklist:
129 logger.debug("blocked='%s' - BEFORE!", blocked)
130 blocked = tidyup.domain(blocked) if blocked != "" else None
131 logger.debug("blocked='%s' - AFTER!", blocked)
133 if blocked is None or blocked == "":
134 logger.warning("blocked='%s' is empty after tidyup.domain(): domain='%s',block_level='%s' - SKIPPED!", blocked, domain, block_level)
137 logger.debug("Invoking utils.deobfuscate(%s, %s) ...", blocked, domain)
138 blocked = utils.deobfuscate(blocked, domain)
140 logger.debug("blocked='%s' - DEOBFUSCATED!", blocked)
141 if blocked is None or blocked == "":
142 logger.warning("instance[host]='%s' is None or empty after tidyup.domain() - SKIPPED!", instance["host"])
144 elif not domain_helper.is_wanted(blocked):
145 logger.debug("blocked='%s' is not wanted - SKIPPED!", blocked)
148 logger.debug("Appending blocker='%s',blocked='%s',block_level='%s' ...", domain, blocked, block_level)
153 "block_level": block_level,
156 elif "quarantined_instances" in data:
157 logger.debug("Found 'quarantined_instances' in JSON response: domain='%s'", domain)
159 block_level = "quarantined"
161 for blocked in data["quarantined_instances"]:
162 logger.debug("blocked='%s' - BEFORE!", blocked)
163 blocked = tidyup.domain(blocked) if blocked != "" else None
165 logger.debug("blocked='%s' - AFTER!", blocked)
166 if blocked is None or blocked == "":
167 logger.warning("blocked is empty after tidyup.domain(): domain='%s',block_level='%s'", domain, block_level)
169 elif not domain_helper.is_wanted(blocked):
170 logger.debug("blocked='%s' is not wanted - SKIPPED!", blocked)
173 logger.debug("Appending blocker='%s',blocked='%s',block_level='%s' ...", domain, blocked, block_level)
178 "block_level": block_level,
182 logger.warning("Cannot find 'mrf_simple' or 'quarantined_instances' in JSON reply: domain='%s'", domain)
184 logger.debug("Invoking commit() ...")
185 database.connection.commit()
188 if "mrf_simple_info" in data:
189 logger.debug("Found mrf_simple_info in API response: domain='%s'", domain)
191 for block_level, info in (
193 **data["mrf_simple_info"],
194 **(data["quarantined_instances_info"] if "quarantined_instances_info" in data else {})
197 logger.debug("block_level='%s', info.items()=%d", block_level, len(info.items()))
198 block_level = tidyup.domain(block_level) if block_level != "" else None
199 logger.debug("block_level='%s' - AFTER!", block_level)
201 if block_level is None or block_level == "":
202 logger.warning("block_level='%s' is now empty!", block_level)
204 elif block_level == "accept":
205 logger.debug("domain='%s': Skipping block_level='%s' ...", domain, block_level)
208 block_level = blocks.alias_block_level(block_level)
210 logger.debug("Checking %d entries from domain='%s',block_level='%s' ...", len(info.items()), domain, block_level)
211 for blocked, reason in info.items():
212 logger.debug("blocked='%s',reason[%s]='%s' - BEFORE!", blocked, type(reason), reason)
213 blocked = tidyup.domain(blocked) if blocked != "" else None
214 logger.debug("blocked='%s' - AFTER!", blocked)
216 if isinstance(reason, str):
217 logger.debug("reason[] is a string")
218 reason = tidyup.reason(reason)
219 elif isinstance(reason, dict) and "reason" in reason:
220 logger.debug("reason[] is a dict")
221 reason = tidyup.reason(reason["reason"]) if isinstance(reason["reason"], str) else None
222 elif reason is not None:
223 raise ValueError(f"Cannot handle reason[]='{type(reason)}'")
225 logger.debug("blocked='%s',reason='%s' - AFTER!", blocked, reason)
228 logger.warning("blocked is empty after tidyup.domain(): domain='%s',block_level='%s'", domain, block_level)
231 logger.debug("Checking %d blockdict records ...", len(blockdict))
232 for block in blockdict:
233 logger.debug("block[blocked]='%s',blocked='%s'", block["blocked"], blocked)
234 if block["blocked"] == blocked:
235 logger.debug("Updating reason='%s' for blocker='%s'", reason, block["blocked"])
236 block["reason"] = reason
238 elif "quarantined_instances_info" in data and "quarantined_instances" in data["quarantined_instances_info"]:
239 logger.debug("Found 'quarantined_instances_info' in JSON response: domain='%s'", domain)
241 block_level = "quarantined"
243 #print(data["quarantined_instances_info"])
244 rows = data["quarantined_instances_info"]["quarantined_instances"]
246 logger.debug("blocked='%s' - BEFORE!", blocked)
247 reason = tidyup.reason(rows[blocked]["reason"])
248 blocked = tidyup.domain(blocked) if blocked != "" else None
249 logger.debug("blocked='%s',reason='%s' - AFTER!", blocked, reason)
251 if blocked not in rows or "reason" not in rows[blocked]:
252 logger.warning("Cannot find blocked='%s' in rows()=%d,domain='%s' - BREAK!", blocked, len(rows), domain)
255 logger.warning("blocked is empty after tidyup.domain(): domain='%s',block_level='%s'", domain, block_level)
258 logger.debug("Checking %d blockdict records ...", len(blockdict))
259 for block in blockdict:
260 logger.debug("block[blocked]='%s',blocked='%s'", block["blocked"], blocked)
261 if block["blocked"] == blocked:
262 logger.debug("Updating reason='%s' for blocker='%s'", reason, block["blocked"])
263 block["reason"] = reason
265 logger.warning("Cannot find 'mrf_simple_info' or 'quarantined_instances_info' in JSON reply: domain='%s'", domain)
268 logger.debug("Did not find any useable JSON elements, domain='%s', continuing with /about page ...", domain)
269 blocklist = fetch_blocks_from_about(domain)
271 logger.debug("blocklist()=%d", len(blocklist))
272 if len(blocklist) > 0:
273 logger.info("Checking %d different blocklists ...", len(blocklist))
274 for block_level in blocklist:
275 logger.debug("block_level='%s'", block_level)
276 rows = blocklist[block_level]
278 logger.debug("rows[%s]()=%d'", type(rows), len(rows))
280 logger.debug("Appending blocker='%s',block[blocked]='%s',block[reason]='%s',block_level='%s' ...",domain, block["blocked"], block["reason"], block_level)
283 "blocked" : block["blocked"],
284 "reason" : block["reason"],
285 "block_level": block_level,
288 logger.debug("blockdict()=%d - EXIT!", len(blockdict))
291 def fetch_blocks_from_about(domain: str) -> dict:
292 logger.debug("domain='%s' - CALLED!", domain)
293 domain_helper.raise_on(domain)
295 if blacklist.is_blacklisted(domain):
296 raise Exception(f"domain='{domain}' is blacklisted but function is invoked.")
297 elif not instances.is_registered(domain):
298 raise Exception(f"domain='{domain}' is not registered but function is invoked.")
300 logger.debug("Fetching mastodon blocks from domain='%s'", domain)
302 for path in ["/instance/about/index.html"]:
307 logger.debug("Fetching path='%s' from domain='%s' ...", path, domain)
308 response = network.fetch_response(
312 (config.get("connection_timeout"), config.get("read_timeout"))
315 logger.debug("response.ok='%s',response.status_code=%d,response.text()=%d", response.ok, response.status_code, len(response.text))
316 if not response.ok or response.text.strip() == "":
317 logger.warning("path='%s' does not exist on domain='%s' - SKIPPED!", path, domain)
320 logger.debug("Parsing response.text()=%d Bytes ...", len(response.text))
321 doc = bs4.BeautifulSoup(
326 logger.debug("doc[]='%s'", type(doc))
327 if doc.find("h2") is not None:
328 logger.debug("Found 'h2' header in path='%s' - BREAK!", path)
331 except network.exceptions as exception:
332 logger.warning("Cannot fetch from domain='%s',exception[%s]='%s'", domain, type(exception), str(exception))
333 instances.set_last_error(domain, exception)
338 "filtered_media": [],
339 "followers_only": [],
342 "media_removal" : [],
343 "federated_timeline_removal": [],
346 logger.debug("doc[]='%s'", type(doc))
348 logger.warning("Cannot fetch any /about pages for domain='%s' - EXIT!", domain)
351 headers = doc.find_all("h2")
353 logger.debug("headers[]='%s'", type(headers))
355 logger.warning("Cannot fetch any /about pages for domain='%s' - EXIT!", domain)
358 logger.info("Checking %d headers ...", len(headers))
359 for header in headers:
360 logger.debug("header[%s]='%s'", type(header), header)
361 block_level = tidyup.reason(header.text).lower()
363 logger.debug("block_level='%s' - BEFORE!", block_level)
364 if block_level in language_mapping:
365 logger.debug("block_level='%s' - FOUND!", block_level)
366 block_level = language_mapping[block_level].lower()
368 logger.warning("block_level='%s' not found in language mapping table", block_level)
370 logger.debug("block_level='%s - AFTER!'", block_level)
371 if block_level in blocklist:
372 # replaced find_next_siblings with find_all_next to account for instances that e.g. hide lists in dropdown menu
373 logger.debug("Found block_level='%s', importing domain blocks ...", block_level)
374 for line in header.find_next("table").find_all("tr")[1:]:
375 logger.debug("line[]='%s'", type(line))
376 blocked = line.find_all("td")[0].text
377 logger.debug("blocked='%s'", blocked)
379 blocked = tidyup.domain(blocked) if blocked != "" else None
380 reason = tidyup.reason(line.find_all("td")[1].text)
381 logger.debug("blocked='%s',reason='%s' - AFTER!", blocked, reason)
383 if blocked is None or blocked == "":
384 logger.debug("domain='%s',block_level='%s': blocked is empty - SKIPPED!", domain, block_level)
386 elif not domain_helper.is_wanted(blocked):
387 logger.debug("blocked='%s' is not wanted - SKIPPED!", blocked)
390 logger.debug("Appending block_level='%s',blocked='%s',reason='%s' ...", block_level, blocked, reason)
391 blocklist[block_level].append({
396 logger.warning("block_level='%s' not found in blocklist()=%d", block_level, len(blocklist))
398 logger.debug("Returning blocklist for domain='%s' - EXIT!", domain)