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 config
25 from fba.helpers import domain as domain_helper
26 from fba.helpers import tidyup
28 from fba.http import network
29 from fba.http import nodeinfo
31 from fba.models import blocks
32 from fba.models import instances
34 logging.basicConfig(level=logging.INFO)
35 logger = logging.getLogger(__name__)
37 # Language mapping X -> English
40 "filtered media" : "filtered_media",
41 "limited servers" : "followers_only",
42 "followers-only" : "followers_only",
43 "media removal" : "media_removal",
44 "media_removal" : "media_removal",
45 "media force-set as sensitive": "media_nsfw",
46 "nsfw" : "media_nsfw",
48 "suspended servers": "reject",
49 "silenced servers" : "silenced",
50 "removal from \"the whole known network\" timeline": "federated_timeline_removal",
53 def fetch_blocks(domain: str) -> list:
54 logger.debug("domain='%s' - CALLED!", domain)
55 domain_helper.raise_on(domain)
57 if not instances.is_registered(domain):
58 raise Exception(f"domain='{domain}' is not registered but function is invoked.")
64 logger.debug("Fetching nodeinfo: domain='%s'", domain)
65 rows = nodeinfo.fetch(domain, update_mode=False)
67 if "error_message" in rows:
68 logger.warning("Error message '%s' during fetching nodeinfo for domain='%s'", rows["error_message"], domain)
69 instances.set_last_error(domain, rows)
70 instances.update(domain)
72 logger.debug("Returning empty list ... - EXIT!")
74 elif "exception" in rows:
75 logger.warning("Exception '%s' during fetching nodeinfo for domain='%s' - EXIT!", type(rows["exception"]), domain)
78 logger.debug("rows[json] found for domain='%s'", domain)
81 except network.exceptions as exception:
82 logger.warning("Exception '%s' during fetching nodeinfo from domain='%s'", type(exception), domain)
83 instances.set_last_error(domain, exception)
86 logger.warning("Could not fetch nodeinfo from domain='%s' - EXIT!", domain)
88 elif "metadata" not in rows:
89 logger.warning("rows()=%d does not have key 'metadata', domain='%s' - EXIT!", len(rows), domain)
91 elif "federation" not in rows["metadata"]:
92 logger.warning("rows()=%d does not have key 'federation', domain='%s' - EXIT!", len(rows["metadata"]), domain)
95 data = rows["metadata"]["federation"]
98 logger.debug("data[]='%s'", type(data))
99 if "mrf_simple" in data:
100 logger.debug("Found mrf_simple in API response from domain='%s'", domain)
102 for block_level, blocklist in (
104 **data["mrf_simple"],
106 "quarantined_instances": data["quarantined_instances"]
110 logger.debug("block_level='%s', blocklist()=%d", block_level, len(blocklist))
111 block_level = tidyup.domain(block_level)
112 logger.debug("block_level='%s' - AFTER!", block_level)
114 if block_level == "":
115 logger.warning("block_level is now empty!")
117 elif block_level == "accept":
118 logger.debug("domain='%s' skipping block_level='accept'", domain)
121 block_level = blocks.alias_block_level(block_level)
123 logger.debug("Checking %d entries from domain='%s',block_level='%s' ...", len(blocklist), domain, block_level)
124 if len(blocklist) > 0:
125 for blocked in blocklist:
126 logger.debug("blocked='%s' - BEFORE!", blocked)
127 blocked = tidyup.domain(blocked)
128 logger.debug("blocked='%s' - AFTER!", blocked)
131 logger.warning("blocked is empty after tidyup.domain(): domain='%s',block_level='%s' - SKIPPED!", domain, block_level)
134 logger.debug("Invoking utils.deobfuscate(%s, %s) ...", blocked, domain)
135 blocked = utils.deobfuscate(blocked, domain)
137 logger.debug("blocked='%s' - DEOBFUSCATED!", blocked)
138 if not domain_helper.is_wanted(blocked):
139 logger.debug("blocked='%s' is not wanted - SKIPPED!", blocked)
142 logger.debug("Appending blocker='%s',blocked='%s',block_level='%s' ...", domain, blocked, block_level)
147 "block_level": block_level,
150 elif "quarantined_instances" in data:
151 logger.debug("Found 'quarantined_instances' in JSON response: domain='%s'", domain)
153 block_level = "quarantined"
155 for blocked in data["quarantined_instances"]:
156 logger.debug("blocked='%s' - BEFORE!", blocked)
157 blocked = tidyup.domain(blocked)
158 logger.debug("blocked='%s' - AFTER!", blocked)
161 logger.warning("blocked is empty after tidyup.domain(): domain='%s',block_level='%s'", domain, block_level)
163 elif not domain_helper.is_wanted(blocked):
164 logger.debug("blocked='%s' is not wanted - SKIPPED!", blocked)
167 logger.debug("Appending blocker='%s',blocked='%s',block_level='%s' ...", domain, blocked, block_level)
172 "block_level": block_level,
176 logger.warning("Cannot find 'mrf_simple' or 'quarantined_instances' in JSON reply: domain='%s'", domain)
178 logger.debug("Invoking commit() ...")
179 database.connection.commit()
182 if "mrf_simple_info" in data:
183 logger.debug("Found mrf_simple_info in API response: domain='%s'", domain)
185 for block_level, info in (
187 **data["mrf_simple_info"],
188 **(data["quarantined_instances_info"] if "quarantined_instances_info" in data else {})
191 logger.debug("block_level='%s', info.items()=%d", block_level, len(info.items()))
192 block_level = tidyup.domain(block_level)
193 logger.debug("block_level='%s' - AFTER!", block_level)
195 if block_level == "":
196 logger.warning("block_level is now empty!")
198 elif block_level == "accept":
199 logger.debug("domain='%s': Skipping block_level='%s' ...", domain, block_level)
202 block_level = blocks.alias_block_level(block_level)
204 logger.debug("Checking %d entries from domain='%s',block_level='%s' ...", len(info.items()), domain, block_level)
205 for blocked, reason in info.items():
206 logger.debug("blocked='%s',reason[%s]='%s' - BEFORE!", blocked, type(reason), reason)
207 blocked = tidyup.domain(blocked)
208 logger.debug("blocked='%s' - AFTER!", blocked)
210 if isinstance(reason, str):
211 logger.debug("reason[] is a string")
212 reason = tidyup.reason(reason)
213 elif isinstance(reason, dict) and "reason" in reason:
214 logger.debug("reason[] is a dict")
215 reason = tidyup.reason(reason["reason"]) if isinstance(reason["reason"], str) else None
216 elif reason is not None:
217 raise ValueError(f"Cannot handle reason[]='{type(reason)}'")
219 logger.debug("blocked='%s',reason='%s' - AFTER!", blocked, reason)
222 logger.warning("blocked is empty after tidyup.domain(): domain='%s',block_level='%s'", domain, block_level)
225 logger.debug("Checking %d blockdict records ...", len(blockdict))
226 for block in blockdict:
227 logger.debug("block[blocked]='%s',blocked='%s'", block["blocked"], blocked)
228 if block["blocked"] == blocked:
229 logger.debug("Updating reason='%s' for blocker='%s'", reason, block["blocked"])
230 block["reason"] = reason
232 elif "quarantined_instances_info" in data and "quarantined_instances" in data["quarantined_instances_info"]:
233 logger.debug("Found 'quarantined_instances_info' in JSON response: domain='%s'", domain)
235 block_level = "quarantined"
237 #print(data["quarantined_instances_info"])
238 rows = data["quarantined_instances_info"]["quarantined_instances"]
240 logger.debug("blocked='%s' - BEFORE!", blocked)
241 reason = tidyup.reason(rows[blocked]["reason"])
242 blocked = tidyup.domain(blocked)
243 logger.debug("blocked='%s',reason='%s' - AFTER!", blocked, reason)
245 if blocked not in rows or "reason" not in rows[blocked]:
246 logger.warning("Cannot find blocked='%s' in rows()=%d,domain='%s' - BREAK!", blocked, len(rows), domain)
249 logger.warning("blocked is empty after tidyup.domain(): domain='%s',block_level='%s'", domain, block_level)
252 logger.debug("Checking %d blockdict records ...", len(blockdict))
253 for block in blockdict:
254 logger.debug("block[blocked]='%s',blocked='%s'", block["blocked"], blocked)
255 if block["blocked"] == blocked:
256 logger.debug("Updating reason='%s' for blocker='%s'", reason, block["blocked"])
257 block["reason"] = reason
259 logger.warning("Cannot find 'mrf_simple_info' or 'quarantined_instances_info' in JSON reply: domain='%s'", domain)
262 logger.debug("Did not find any useable JSON elements, domain='%s', continuing with /about page ...", domain)
263 blocklist = fetch_blocks_from_about(domain)
265 logger.debug("blocklist()=%d", len(blocklist))
266 if len(blocklist) > 0:
267 logger.info("Checking %d different blocklists ...", len(blocklist))
268 for block_level in blocklist:
269 logger.debug("block_level='%s'", block_level)
270 rows = blocklist[block_level]
272 logger.debug("rows[%s]()=%d'", type(rows), len(rows))
274 logger.debug("Appending blocker='%s',block[blocked]='%s',block[reason]='%s',block_level='%s' ...",domain, block["blocked"], block["reason"], block_level)
277 "blocked" : block["blocked"],
278 "reason" : block["reason"],
279 "block_level": block_level,
282 logger.debug("blockdict()=%d - EXIT!", len(blockdict))
285 def fetch_blocks_from_about(domain: str) -> dict:
286 logger.debug("domain='%s' - CALLED!", domain)
287 domain_helper.raise_on(domain)
289 if not instances.is_registered(domain):
290 raise Exception(f"domain='{domain}' is not registered but function is invoked.")
292 logger.debug("Fetching mastodon blocks from domain='%s'", domain)
294 for path in ["/instance/about/index.html"]:
299 logger.debug("Fetching path='%s' from domain='%s' ...", path, domain)
300 response = network.fetch_response(
304 (config.get("connection_timeout"), config.get("read_timeout"))
307 logger.debug("response.ok='%s',response.status_code=%d,response.text()=%d", response.ok, response.status_code, len(response.text))
308 if not response.ok or response.text.strip() == "":
309 logger.warning("path='%s' does not exist on domain='%s' - SKIPPED!", path, domain)
312 logger.debug("Parsing response.text()=%d Bytes ...", len(response.text))
313 doc = bs4.BeautifulSoup(
318 logger.debug("doc[]='%s'", type(doc))
319 if doc.find("h2") is not None:
320 logger.debug("Found 'h2' header in path='%s' - BREAK!", path)
323 except network.exceptions as exception:
324 logger.warning("Cannot fetch from domain='%s',exception[%s]='%s'", domain, type(exception), str(exception))
325 instances.set_last_error(domain, exception)
330 "filtered_media": [],
331 "followers_only": [],
334 "media_removal" : [],
335 "federated_timeline_removal": [],
338 logger.debug("doc[]='%s'", type(doc))
340 logger.warning("Cannot fetch any /about pages for domain='%s' - EXIT!", domain)
343 headers = doc.find_all("h2")
345 logger.debug("headers[]='%s'", type(headers))
347 logger.warning("Cannot fetch any /about pages for domain='%s' - EXIT!", domain)
350 logger.info("Checking %d headers ...", len(headers))
351 for header in headers:
352 logger.debug("header[%s]='%s'", type(header), header)
353 block_level = tidyup.reason(header.text).lower()
355 logger.debug("block_level='%s' - BEFORE!", block_level)
356 if block_level in language_mapping:
357 logger.debug("block_level='%s' - FOUND!", block_level)
358 block_level = language_mapping[block_level].lower()
360 logger.warning("block_level='%s' not found in language mapping table", block_level)
362 logger.debug("block_level='%s - AFTER!'", block_level)
363 if block_level in blocklist:
364 # replaced find_next_siblings with find_all_next to account for instances that e.g. hide lists in dropdown menu
365 logger.debug("Found block_level='%s', importing domain blocks ...", block_level)
366 for line in header.find_next("table").find_all("tr")[1:]:
367 logger.debug("line[]='%s'", type(line))
368 blocked = tidyup.domain(line.find_all("td")[0].text)
369 reason = tidyup.reason(line.find_all("td")[1].text)
371 if blocked is None or blocked == "":
372 logger.debug("domain='%s',block_level='%s': blocked is empty - SKIPPED!", domain, block_level)
374 elif not domain_helper.is_wanted(blocked):
375 logger.debug("blocked='%s' is not wanted - SKIPPED!", blocked)
378 logger.debug("Appending block_level='%s',blocked='%s',reason='%s' ...", block_level, blocked, reason)
379 blocklist[block_level].append({
384 logger.warning("block_level='%s' not found in blocklist()=%d", block_level, len(blocklist))
386 logger.debug("Returning blocklist for domain='%s' - EXIT!", domain)