fba/networks/mastodon.py

   1 # Fedi API Block - An aggregator for fetching blocking data from fediverse nodes
   2 # Copyright (C) 2023 Free Software Foundation
   3 #
   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.
   8 #
   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.
  13 #
  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/>.
  16
  17 import inspect
  18
  19 import bs4
  20 import validators
  21
  22 from fba import blacklist
  23 from fba import config
  24 from fba import csrf
  25 from fba import fba
  26 from fba import network
  27
  28 from fba.helpers import tidyup
  29
  30 from fba.models import blocks
  31 from fba.models import instances
  32
  33 language_mapping = {
  34     # English -> English
  35     "Silenced instances"            : "Silenced servers",
  36     "Suspended instances"           : "Suspended servers",
  37     "Limited instances"             : "Limited servers",
  38     "Filtered media"                : "Filtered media",
  39     # Mappuing German -> English
  40     "Gesperrte Server"              : "Suspended servers",
  41     "Gefilterte Medien"             : "Filtered media",
  42     "Stummgeschaltete Server"       : "Silenced servers",
  43     # Japanese -> English
  44     "停止済みのサーバー"            : "Suspended servers",
  45     "制限中のサーバー"              : "Limited servers",
  46     "メディアを拒否しているサーバー": "Filtered media",
  47     "サイレンス済みのサーバー"      : "Silenced servers",
  48     # ??? -> English
  49     "שרתים מושעים"                  : "Suspended servers",
  50     "מדיה מסוננת"                   : "Filtered media",
  51     "שרתים מוגבלים"                 : "Silenced servers",
  52     # French -> English
  53     "Serveurs suspendus"            : "Suspended servers",
  54     "Médias filtrés"                : "Filtered media",
  55     "Serveurs limités"              : "Limited servers",
  56     "Serveurs modérés"              : "Limited servers",
  57 }
  58
  59 def fetch_blocks_from_about(domain: str) -> dict:
  60     # DEBUG: print(f"DEBUG: domain='{domain}' - CALLED!")
  61     if not isinstance(domain, str):
  62         raise ValueError(f"Parameter domain[]='{type(domain)}' is not 'str'")
  63     elif domain == "":
  64         raise ValueError("Parameter 'domain' is empty")
  65
  66     # DEBUG: print("DEBUG: Fetching mastodon blocks from domain:", domain)
  67     doc = None
  68     for path in ["/about/more", "/about"]:
  69         try:
  70             # DEBUG: print(f"DEBUG: Fetching path='{path}' from domain='{domain}' ...")
  71             doc = bs4.BeautifulSoup(
  72                 network.fetch_response(
  73                     domain,
  74                     path,
  75                     network.web_headers,
  76                     (config.get("connection_timeout"), config.get("read_timeout"))
  77                 ).text,
  78                 "html.parser",
  79             )
  80
  81             if len(doc.find_all("h3")) > 0:
  82                 # DEBUG: print(f"DEBUG: path='{path}' had some headlines - BREAK!")
  83                 break
  84
  85         except BaseException as exception:
  86             print("ERROR: Cannot fetch from domain:", domain, exception)
  87             instances.set_last_error(domain, exception)
  88             break
  89
  90     blocklist = {
  91         "Suspended servers": [],
  92         "Filtered media"   : [],
  93         "Limited servers"  : [],
  94         "Silenced servers" : [],
  95     }
  96
  97     # DEBUG: print(f"DEBUG: doc[]='{type(doc)}'")
  98     if doc is None:
  99         print(f"WARNING: Cannot fetch any /about pages for domain='{domain}' - EXIT!")
 100         return blocklist
 101
 102     for header in doc.find_all("h3"):
 103         header_text = tidyup.reason(header.text)
 104
 105         # DEBUG: print(f"DEBUG: header_text='{header_text}'")
 106         if header_text in language_mapping:
 107             # DEBUG: print(f"DEBUG: header_text='{header_text}'")
 108             header_text = language_mapping[header_text]
 109         else:
 110             print(f"WARNING: header_text='{header_text}' not found in language mapping table")
 111
 112         if header_text in blocklist or header_text.lower() in blocklist:
 113             # replaced find_next_siblings with find_all_next to account for instances that e.g. hide lists in dropdown menu
 114             for line in header.find_all_next("table")[0].find_all("tr")[1:]:
 115                 blocklist[header_text].append({
 116                     "domain": tidyup.domain(line.find("span").text),
 117                     "hash"  : tidyup.domain(line.find("span")["title"][9:]),
 118                     "reason": tidyup.reason(line.find_all("td")[1].text),
 119                 })
 120         else:
 121             print(f"WARNING: header_text='{header_text}' not found in blocklist()={len(blocklist)}")
 122
 123     # DEBUG: print("DEBUG: Returning blocklist for domain:", domain)
 124     return {
 125         "reject"        : blocklist["Suspended servers"],
 126         "media_removal" : blocklist["Filtered media"],
 127         "followers_only": blocklist["Limited servers"] + blocklist["Silenced servers"],
 128     }
 129
 130 def fetch_blocks(domain: str, origin: str, nodeinfo_url: str):
 131     # DEBUG: print(f"DEBUG: domain='{domain}',origin='{origin}',nodeinfo_url='{nodeinfo_url}' - CALLED!")
 132     if not isinstance(domain, str):
 133         raise ValueError(f"Parameter domain[]='{type(domain)}' is not 'str'")
 134     elif domain == "":
 135         raise ValueError("Parameter 'domain' is empty")
 136     elif not isinstance(origin, str) and origin is not None:
 137         raise ValueError(f"Parameter origin[]='{type(origin)}' is not 'str'")
 138     elif origin == "":
 139         raise ValueError("Parameter 'origin' is empty")
 140     elif not isinstance(nodeinfo_url, str):
 141         raise ValueError(f"Parameter nodeinfo_url[]='{type(nodeinfo_url)}' is not 'str'")
 142     elif nodeinfo_url == "":
 143         raise ValueError("Parameter 'nodeinfo_url' is empty")
 144
 145     # No CSRF by default, you don't have to add network.api_headers by yourself here
 146     headers = tuple()
 147
 148     try:
 149         # DEBUG: print(f"DEBUG: Checking CSRF for domain='{domain}'")
 150         headers = csrf.determine(domain, dict())
 151     except network.exceptions as exception:
 152         print(f"WARNING: Exception '{type(exception)}' during checking CSRF (fetch_blocks,{__name__}) - EXIT!")
 153         return
 154
 155     try:
 156         # json endpoint for newer mastodongs
 157         found_blocks = list()
 158         blocklist = list()
 159
 160         rows = {
 161             "reject"        : [],
 162             "media_removal" : [],
 163             "followers_only": [],
 164             "report_removal": [],
 165         }
 166
 167         # DEBUG: print("DEBUG: Querying API domain_blocks:", domain)
 168         data = network.get_json_api(
 169             domain,
 170             "/api/v1/instance/domain_blocks",
 171             headers,
 172             (config.get("connection_timeout"), config.get("read_timeout"))
 173         )
 174
 175         # DEBUG: print(f"DEBUG: data[]='{type(data)}'")
 176         if "error_message" in data:
 177             # DEBUG: print(f"DEBUG: Was not able to fetch domain_blocks from domain='{domain}': status_code='{data['status_code']}',error_message='{data['error_message']}'")
 178             instances.set_last_error(domain, data)
 179             return
 180         elif "json" in data and "error" in data["json"]:
 181             print(f"WARNING: JSON API returned error message: '{data['json']['error']}'")
 182             instances.set_last_error(domain, data)
 183             return
 184         else:
 185             # Getting blocklist
 186             blocklist = data["json"]
 187
 188         if len(blocklist) > 0:
 189             print(f"INFO: Checking {len(blocklist)} entries from domain='{domain}',software='mastodon' ...")
 190             for block in blocklist:
 191                 # Check type
 192                 # DEBUG: print(f"DEBUG: block[]='{type(block)}'")
 193                 if not isinstance(block, dict):
 194                     # DEBUG: print(f"DEBUG: block[]='{type(block)}' is of type 'dict' - SKIPPED!")
 195                     continue
 196
 197                 # Map block -> entry
 198                 # DEBUG: print(f"DEBUG: block[{type(block)}]='{block}'")
 199                 entry = {
 200                     "domain": block["domain"],
 201                     "hash"  : block["digest"],
 202                     "reason": block["comment"] if "comment" in block else None
 203                 }
 204
 205                 # DEBUG: print("DEBUG: severity,domain,hash,comment:", block['severity'], block['domain'], block['digest'], block['comment'])
 206                 if block['severity'] == 'suspend':
 207                     # DEBUG: print(f"DEBUG: Adding entry='{entry}' with severity='{block['severity']}' ...")
 208                     rows['reject'].append(entry)
 209                 elif block['severity'] == 'silence':
 210                     # DEBUG: print(f"DEBUG: Adding entry='{entry}' with severity='{block['severity']}' ...")
 211                     rows['followers_only'].append(entry)
 212                 elif block['severity'] == 'reject_media':
 213                     # DEBUG: print(f"DEBUG: Adding entry='{entry}' with severity='{block['severity']}' ...")
 214                     rows['media_removal'].append(entry)
 215                 elif block['severity'] == 'reject_reports':
 216                     # DEBUG: print(f"DEBUG: Adding entry='{entry}' with severity='{block['severity']}' ...")
 217                     rows['report_removal'].append(entry)
 218                 else:
 219                     print(f"WARNING: Unknown severity='{block['severity']}', domain='{block['domain']}'")
 220         else:
 221             # DEBUG: print(f"DEBUG: domain='{domain}' has returned zero rows, trying /about/more page ...")
 222             rows = fetch_blocks_from_about(domain)
 223
 224         print(f"INFO: Checking {len(rows.items())} entries from domain='{domain}',software='mastodon' ...")
 225         for block_level, blocklist in rows.items():
 226             # DEBUG: print("DEBUG: domain,block_level,blocklist():", domain, block_level, len(blocklist))
 227             block_level = tidyup.domain(block_level)
 228
 229             # DEBUG: print("DEBUG: AFTER-block_level:", block_level)
 230             if block_level == "":
 231                 print("WARNING: block_level is empty, domain:", domain)
 232                 continue
 233
 234             # DEBUG: print(f"DEBUG: Checking {len(blocklist)} entries from domain='{domain}',software='mastodon',block_level='{block_level}' ...")
 235             for block in blocklist:
 236                 # DEBUG: print(f"DEBUG: block[]='{type(block)}'")
 237                 blocked, blocked_hash, reason = block.values()
 238                 # DEBUG: print(f"DEBUG: blocked='{blocked}',blocked_hash='{blocked_hash}',reason='{reason}':")
 239                 blocked = tidyup.domain(blocked)
 240                 reason  = tidyup.reason(reason) if reason is not None and reason != "" else None
 241                 # DEBUG: print(f"DEBUG: blocked='{blocked}',reason='{reason}' - AFTER!")
 242
 243                 if blocked == "":
 244                     print("WARNING: blocked is empty:", domain)
 245                     continue
 246                 elif blacklist.is_blacklisted(blocked):
 247                     # DEBUG: print(f"DEBUG: blocked='{blocked}' is blacklisted - skipping!")
 248                     continue
 249                 elif blocked.count("*") > 0:
 250                     # Doing the hash search for instance names as well to tidy up DB
 251                     row = instances.deobscure("*", blocked, blocked_hash)
 252
 253                     # DEBUG: print(f"DEBUG: row[]='{type(row)}'")
 254                     if row is None:
 255                         print(f"WARNING: Cannot deobsfucate blocked='{blocked}',blocked_hash='{blocked_hash}' - SKIPPED!")
 256                         continue
 257
 258                     # DEBUG: print("DEBUG: Updating domain: ", row[0])
 259                     blocked      = row[0]
 260                     origin       = row[1]
 261                     nodeinfo_url = row[2]
 262                 elif blocked.count("?") > 0:
 263                     # Doing the hash search for instance names as well to tidy up DB
 264                     row = instances.deobscure("?", blocked, blocked_hash)
 265
 266                     # DEBUG: print(f"DEBUG: row[]='{type(row)}'")
 267                     if row is None:
 268                         print(f"WARNING: Cannot deobsfucate blocked='{blocked}',blocked_hash='{blocked_hash}' - SKIPPED!")
 269                         continue
 270
 271                     # DEBUG: print("DEBUG: Updating domain: ", row[0])
 272                     blocked      = row[0]
 273                     origin       = row[1]
 274                     nodeinfo_url = row[2]
 275
 276                 # DEBUG: print("DEBUG: Looking up instance by domain:", blocked)
 277                 if not validators.domain(blocked):
 278                     print(f"WARNING: blocked='{blocked}',software='mastodon' is not a valid domain name - SKIPPED!")
 279                     continue
 280                 elif blocked.endswith(".arpa"):
 281                     print(f"WARNING: blocked='{blocked}' is a reversed .arpa domain and should not be used generally.")
 282                     continue
 283                 elif not instances.is_registered(blocked):
 284                     # DEBUG: print(f"DEBUG: Domain blocked='{blocked}' wasn't found, adding ..., domain='{domain}',origin='{origin}',nodeinfo_url='{nodeinfo_url}'")
 285                     instances.add(blocked, domain, inspect.currentframe().f_code.co_name, nodeinfo_url)
 286
 287                 # DEBUG: print("DEBUG: Looking up instance by domain:", blocked)
 288                 if not validators.domain(blocked):
 289                     print(f"WARNING: blocked='{blocked}',software='mastodon' is not a valid domain name - SKIPPED!")
 290                     continue
 291                 elif blocked.endswith(".arpa"):
 292                     print(f"WARNING: blocked='{blocked}' is a reversed .arpa domain and should not be used generally.")
 293                     continue
 294                 elif not instances.is_registered(blocked):
 295                     # DEBUG: print("DEBUG: Hash wasn't found, adding:", blocked, domain)
 296                     instances.add(blocked, domain, inspect.currentframe().f_code.co_name, nodeinfo_url)
 297
 298                 if not blocks.is_instance_blocked(domain, blocked, block_level):
 299                     # DEBUG: print("DEBUG: Blocking:", domain, blocked, block_level)
 300                     blocks.add_instance(domain, blocked, reason, block_level)
 301
 302                     if block_level == "reject":
 303                         found_blocks.append({
 304                             "blocked": blocked,
 305                             "reason" : reason
 306                         })
 307                 else:
 308                     # DEBUG: print(f"DEBUG: Updating block last seen and reason for domain='{domain}',blocked='{blocked}' ...")
 309                     blocks.update_last_seen(domain, blocked, block_level)
 310                     blocks.update_reason(reason, domain, blocked, block_level)
 311
 312         # DEBUG: print("DEBUG: Committing changes ...")
 313         fba.connection.commit()
 314     except network.exceptions as exception:
 315         print(f"ERROR: domain='{domain}',software='mastodon',exception[{type(exception)}]:'{str(exception)}'")
 316
 317     # DEBUG: print("DEBUG: EXIT!")