import json from typing import Optional import httpx import urlman from asgiref.sync import sync_to_async from django.conf import settings from django.db import models from stator.models import State, StateField, StateGraph, StatorModel from users.schemas import NodeInfo class DomainStates(StateGraph): outdated = State(try_interval=60 * 30, force_initial=True) updated = State(try_interval=60 * 60 * 24, attempt_immediately=False) connection_issue = State(externally_progressed=True) purged = State() outdated.transitions_to(updated) updated.transitions_to(outdated) outdated.transitions_to(connection_issue) outdated.transitions_to(purged) connection_issue.transitions_to(outdated) connection_issue.transitions_to(purged) outdated.times_out_to(connection_issue, 60 * 60 * 24) @classmethod async def handle_outdated(cls, instance: "Domain"): info = await instance.fetch_nodeinfo() if info: instance.nodeinfo = info.dict() await sync_to_async(instance.save)() return cls.updated @classmethod async def handle_updated(cls, instance: "Domain"): return cls.outdated class Domain(StatorModel): """ Represents a domain that a user can have an account on. For protocol reasons, if we want to allow custom usernames per domain, each "display" domain (the one in the handle) must either let us serve on it directly, or have a "service" domain that maps to it uniquely that we can serve on that. That way, someone coming in with just an Actor URI as their entrypoint can still try to webfinger preferredUsername@actorDomain and we can return an appropriate response. It's possible to just have one domain do both jobs, of course. This model also represents _other_ servers' domains, which we treat as display domains for now, until we start doing better probing. """ domain = models.CharField(max_length=250, primary_key=True) service_domain = models.CharField( max_length=250, null=True, blank=True, db_index=True, unique=True, ) state = StateField(DomainStates) # nodeinfo 2.0 detail about the remote server nodeinfo = models.JSONField(null=True, blank=True) # If we own this domain local = models.BooleanField() # If we have blocked this domain from interacting with us blocked = models.BooleanField(default=False) # Domains can be joinable by any user of the instance (as the default one # should) public = models.BooleanField(default=False) # If this is the default domain (shown as the default entry for new users) default = models.BooleanField(default=False) # Domains can also be linked to one or more users for their private use # This should be display domains ONLY users = models.ManyToManyField("users.User", related_name="domains", blank=True) created = models.DateTimeField(auto_now_add=True) updated = models.DateTimeField(auto_now=True) class urls(urlman.Urls): root = "/admin/domains/" create = "/admin/domains/create/" edit = "/admin/domains/{self.domain}/" delete = "{edit}delete/" root_federation = "/admin/federation/" edit_federation = "/admin/federation/{self.domain}/" @classmethod def get_remote_domain(cls, domain: str) -> "Domain": return cls.objects.get_or_create(domain=domain.lower(), local=False)[0] @classmethod def get_domain(cls, domain: str) -> Optional["Domain"]: try: return cls.objects.get( models.Q(domain=domain.lower()) | models.Q(service_domain=domain.lower()) ) except cls.DoesNotExist: return None @property def uri_domain(self) -> str: if self.service_domain: return self.service_domain return self.domain @classmethod def available_for_user(cls, user): """ Returns domains that are available for the user to put an identity on """ return cls.objects.filter( models.Q(public=True) | models.Q(users__id=user.id), local=True, ).order_by("-default", "domain") def __str__(self): return self.domain def save(self, *args, **kwargs): # Ensure that we are not conflicting with other domains if Domain.objects.filter(service_domain=self.domain).exists(): raise ValueError( f"Domain {self.domain} is already a service domain elsewhere!" ) if self.service_domain: if Domain.objects.filter(domain=self.service_domain).exists(): raise ValueError( f"Service domain {self.service_domain} is already a domain elsewhere!" ) super().save(*args, **kwargs) async def fetch_nodeinfo(self) -> NodeInfo | None: """ Fetch the /NodeInfo/2.0 for the domain """ nodeinfo20_url = f"https://{self.domain}/nodeinfo/2.0" async with httpx.AsyncClient( timeout=settings.SETUP.REMOTE_TIMEOUT, headers={"User-Agent": settings.TAKAHE_USER_AGENT}, ) as client: try: response = await client.get( f"https://{self.domain}/.well-known/nodeinfo", follow_redirects=True, headers={"Accept": "application/json"}, ) except httpx.HTTPError: pass else: try: for link in response.json().get("links", []): if ( link.get("rel") == "http://nodeinfo.diaspora.software/ns/schema/2.0" ): nodeinfo20_url = link.get("href", nodeinfo20_url) break except json.JSONDecodeError: pass try: response = await client.get( nodeinfo20_url, follow_redirects=True, headers={"Accept": "application/json"}, ) response.raise_for_status() except httpx.HTTPError as ex: response = getattr(ex, "response", None) if ( response and response.status_code < 500 and response.status_code not in [401, 403, 404, 406, 410] ): raise ValueError( f"Client error fetching nodeinfo: domain={self.domain}, code={response.status_code}", response.content, ) return None try: info = NodeInfo(**response.json()) except json.JSONDecodeError as ex: raise ValueError( f"Client error decoding nodeinfo: domain={self.domain}, error={str(ex)}" ) return info @property def software(self): if self.nodeinfo: software = self.nodeinfo.get("software", {}) name = software.get("name", "unknown") version = software.get("version", "unknown") return f"{name:.10} - {version:.10}" return None