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122 lines
4.5 KiB
Python
122 lines
4.5 KiB
Python
import secrets
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from urllib.parse import urlparse, urlunparse
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from django.contrib.auth.mixins import LoginRequiredMixin
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from django.http import HttpResponseRedirect, JsonResponse
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from django.shortcuts import render
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from django.utils.decorators import method_decorator
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from django.views.decorators.csrf import csrf_exempt
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from django.views.generic import TemplateView, View
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from api.models import Application, Token
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from api.parser import FormOrJsonParser
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class OauthRedirect(HttpResponseRedirect):
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def __init__(self, redirect_uri, key, value):
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url_parts = urlparse(redirect_uri)
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self.allowed_schemes = [url_parts.scheme]
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# Either add or join the query section
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url_parts = list(url_parts)
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if url_parts[4]:
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url_parts[4] = url_parts[4] + f"&{key}={value}"
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else:
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url_parts[4] = f"{key}={value}"
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super().__init__(urlunparse(url_parts))
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class AuthorizationView(LoginRequiredMixin, TemplateView):
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"""
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Asks the user to authorize access.
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Could maybe be a FormView, but things are weird enough we just handle the
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POST manually.
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"""
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template_name = "api/oauth_authorize.html"
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def get_context_data(self):
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redirect_uri = self.request.GET["redirect_uri"]
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scope = self.request.GET.get("scope", "read")
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try:
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application = Application.objects.get(
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client_id=self.request.GET["client_id"]
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)
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except (Application.DoesNotExist, KeyError):
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return OauthRedirect(redirect_uri, "error", "invalid_application")
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return {
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"application": application,
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"redirect_uri": redirect_uri,
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"scope": scope,
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"identities": self.request.user.identities.all(),
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}
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def post(self, request):
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post_data = FormOrJsonParser().parse_body(request)
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# Grab the application and other details again
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redirect_uri = post_data["redirect_uri"]
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scope = post_data["scope"]
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application = Application.objects.get(client_id=post_data["client_id"])
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# Get the identity
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identity = self.request.user.identities.get(pk=post_data["identity"])
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# Make a token
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token = Token.objects.create(
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application=application,
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user=self.request.user,
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identity=identity,
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token=secrets.token_urlsafe(32),
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code=secrets.token_urlsafe(16),
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scopes=scope.split(),
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)
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# If it's an out of band request, show the code
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if redirect_uri == "urn:ietf:wg:oauth:2.0:oob":
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return render(request, "api/oauth_code.html", {"code": token.code})
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# Redirect with the token's code
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return OauthRedirect(redirect_uri, "code", token.code)
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@method_decorator(csrf_exempt, name="dispatch")
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class TokenView(View):
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def post(self, request):
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post_data = FormOrJsonParser().parse_body(request)
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grant_type = post_data.get("grant_type")
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if grant_type not in (
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"authorization_code",
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"client_credentials",
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):
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return JsonResponse({"error": "invalid_grant_type"}, status=400)
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try:
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application = Application.objects.get(client_id=post_data["client_id"])
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except (Application.DoesNotExist, KeyError):
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return JsonResponse({"error": "invalid_client_id"}, status=400)
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# TODO: Implement client credentials flow
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if grant_type == "client_credentials":
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return JsonResponse({"error": "invalid_grant_type"}, status=400)
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elif grant_type == "authorization_code":
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code = post_data.get("code")
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if not code:
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return JsonResponse({"error": "invalid_code"}, status=400)
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# Retrieve the token by code
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# TODO: Check code expiry based on created date
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try:
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token = Token.objects.get(code=code, application=application)
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except Token.DoesNotExist:
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return JsonResponse({"error": "invalid_code"}, status=400)
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# Update the token to remove its code
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token.code = None
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token.save()
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# Return them the token
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return JsonResponse(
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{
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"access_token": token.token,
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"token_type": "Bearer",
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"scope": " ".join(token.scopes),
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"created_at": int(token.created.timestamp()),
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}
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)
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class RevokeTokenView(View):
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pass
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