Refactor get_user_from_username to raise 404 directly

bookwyrm/tests/views/test_helpers.py

@@ -3,6 +3,7 @@ import json
 from unittest.mock import patch
 import pathlib
 from django.db.models import Q
+from django.http import Http404
 from django.test import TestCase
 from django.test.client import RequestFactory
 import responses
@@ -67,7 +68,7 @@ class ViewsHelpers(TestCase):
             views.helpers.get_user_from_username(self.local_user, "mouse@local.com"),
             self.local_user,
         )
-        with self.assertRaises(models.User.DoesNotExist):
+        with self.assertRaises(Http404):
             views.helpers.get_user_from_username(self.local_user, "mojfse@example.com")
 
     def test_is_api_request(self, _):

bookwyrm/views/feed.py

@@ -2,7 +2,7 @@
 from django.contrib.auth.decorators import login_required
 from django.core.paginator import Paginator
 from django.db.models import Q
-from django.http import HttpResponseNotFound
+from django.http import HttpResponseNotFound, Http404
 from django.template.response import TemplateResponse
 from django.utils import timezone
 from django.utils.decorators import method_decorator
@@ -62,7 +62,7 @@ class DirectMessage(View):
         if username:
             try:
                 user = get_user_from_username(request.user, username)
-            except models.User.DoesNotExist:
+            except Http404:
                 pass
         if user:
             queryset = queryset.filter(Q(user=user) | Q(mention_users=user))
@@ -94,7 +94,7 @@ class Status(View):
             status = models.Status.objects.select_subclasses().get(
                 id=status_id, deleted=False
             )
-        except (ValueError, models.Status.DoesNotExist, models.User.DoesNotExist):
+        except (ValueError, models.Status.DoesNotExist):
             return HttpResponseNotFound()
 
         # the url should have the poster's username in it

bookwyrm/views/follow.py

@@ -14,10 +14,7 @@ from .helpers import get_user_from_username
 def follow(request):
     """follow another user, here or abroad"""
     username = request.POST["user"]
-    try:
     to_follow = get_user_from_username(request.user, username)
-    except models.User.DoesNotExist:
-        return HttpResponseBadRequest()
 
     try:
         models.UserFollowRequest.objects.create(
@@ -35,10 +32,7 @@ def follow(request):
 def unfollow(request):
     """unfollow a user"""
     username = request.POST["user"]
-    try:
     to_unfollow = get_user_from_username(request.user, username)
-    except models.User.DoesNotExist:
-        return HttpResponseBadRequest()
 
     try:
         models.UserFollows.objects.get(
@@ -63,10 +57,7 @@ def unfollow(request):
 def accept_follow_request(request):
     """a user accepts a follow request"""
     username = request.POST["user"]
-    try:
     requester = get_user_from_username(request.user, username)
-    except models.User.DoesNotExist:
-        return HttpResponseBadRequest()
 
     try:
         follow_request = models.UserFollowRequest.objects.get(
@@ -85,10 +76,7 @@ def accept_follow_request(request):
 def delete_follow_request(request):
     """a user rejects a follow request"""
     username = request.POST["user"]
-    try:
     requester = get_user_from_username(request.user, username)
-    except models.User.DoesNotExist:
-        return HttpResponseBadRequest()
 
     try:
         follow_request = models.UserFollowRequest.objects.get(

bookwyrm/views/helpers.py

@@ -3,6 +3,7 @@ import re
 from requests import HTTPError
 from django.core.exceptions import FieldError
 from django.db.models import Count, Max, Q
+from django.http import Http404
 
 from bookwyrm import activitypub, models
 from bookwyrm.connectors import ConnectorException, get_data
@@ -12,11 +13,17 @@ from bookwyrm.utils import regex
 
 def get_user_from_username(viewer, username):
     """helper function to resolve a localname or a username to a user"""
-    # raises DoesNotExist if user is now found
+    # raises 404 if the user isn't found
     try:
         return models.User.viewer_aware_objects(viewer).get(localname=username)
     except models.User.DoesNotExist:
+        pass
+
+    # if the localname didn't match, try the username
+    try:
         return models.User.viewer_aware_objects(viewer).get(username=username)
+    except models.User.DoesNotExist:
+        raise Http404()
 
 
 def is_api_request(request):

bookwyrm/views/shelf.py

@@ -25,10 +25,7 @@ class Shelf(View):
 
     def get(self, request, username, shelf_identifier=None):
         """display a shelf"""
-        try:
         user = get_user_from_username(request.user, username)
-        except models.User.DoesNotExist:
-            return HttpResponseNotFound()
 
         shelves = privacy_filter(request.user, user.shelf_set)
 

bookwyrm/views/user.py

@@ -6,7 +6,6 @@ from PIL import Image
 from django.contrib.auth.decorators import login_required
 from django.core.files.base import ContentFile
 from django.core.paginator import Paginator
-from django.http import HttpResponseNotFound
 from django.shortcuts import redirect
 from django.template.response import TemplateResponse
 from django.utils import timezone
@@ -26,10 +25,7 @@ class User(View):
 
     def get(self, request, username):
         """profile page for a user"""
-        try:
         user = get_user_from_username(request.user, username)
-        except models.User.DoesNotExist:
-            return HttpResponseNotFound()
 
         if is_api_request(request):
             # we have a json request
@@ -90,10 +86,7 @@ class Followers(View):
 
     def get(self, request, username):
         """list of followers"""
-        try:
         user = get_user_from_username(request.user, username)
-        except models.User.DoesNotExist:
-            return HttpResponseNotFound()
 
         if is_api_request(request):
             return ActivitypubResponse(user.to_followers_activity(**request.GET))
@@ -112,10 +105,7 @@ class Following(View):
 
     def get(self, request, username):
         """list of followers"""
-        try:
         user = get_user_from_username(request.user, username)
-        except models.User.DoesNotExist:
-            return HttpResponseNotFound()
 
         if is_api_request(request):
             return ActivitypubResponse(user.to_following_activity(**request.GET))