show TOKEN only on create

return the token as message to the user
change MIDDLEWARE_CLASSES (obsolete) to MIDDLEWARE, add required apps, middleware and context processors for admin pages
add admin urls to reference project
Add admin form for creating AuthTokens, add admin filter for searching AuthTokens
Refactor AuthTokenManager, separate methods for token/digest/expiry logic

Author: paulgueltekin

knox/admin.py

@@ -1,10 +1,49 @@
-from django.contrib import admin
-
+from django import forms
+from django.contrib import admin, messages
+from django.contrib.auth import get_user_model
+from knox.settings import CONSTANTS
 from knox import models
 
 
+class AuthTokenCreateForm(forms.ModelForm):
+
+    def __init__(self, *args, **kwargs):
+        super(AuthTokenCreateForm, self).__init__(*args, **kwargs)
+        self.token = None
+
+    class Meta:
+        model = models.AuthToken
+        fields = ['user', 'expiry']
+
+    def save(self, commit=True):
+        obj = super(AuthTokenCreateForm, self).save(commit=False)
+        digest, token = models.get_digest_token()
+        obj.digest = digest
+        obj.token_key = token[:CONSTANTS.TOKEN_KEY_LENGTH]
+        self.token = token
+        if commit:
+            obj.save()
+            obj.save_m2m()
+        return obj
+
+
 @admin.register(models.AuthToken)
 class AuthTokenAdmin(admin.ModelAdmin):
+    add_form = AuthTokenCreateForm
     list_display = ('digest', 'user', 'created', 'expiry',)
+    # We dont know how a custom User model looks like, but is must have a USERNAME_FIELD
+    search_fields = ['digest', 'token_key', 'user__'+get_user_model().USERNAME_FIELD]
     fields = ()
     raw_id_fields = ('user',)
+
+    def get_form(self, request, obj=None, **kwargs):
+        defaults = {}
+        if obj is None:
+            defaults['form'] = self.add_form
+        defaults.update(kwargs)
+        return super(AuthTokenAdmin, self).get_form(request, obj, **defaults)
+
+    def save_model(self, request, obj, form, change):
+        if not change:
+            self.message_user(request, "TOKEN " + form.token, messages.INFO)
+        super(AuthTokenAdmin, self).save_model(request, obj, form, change)

knox/models.py

@@ -12,6 +12,18 @@
 User = settings.AUTH_USER_MODEL
 
 
+def get_expiry(expiry):
+    if expiry is not None:
+        expiry = timezone.now() + expiry
+    return expiry
+
+
+def get_digest_token(prefix=knox_settings.TOKEN_PREFIX):
+    token = prefix + crypto.create_token_string()
+    digest = crypto.hash_token(token)
+    return digest, token
+
+
 class AuthTokenManager(models.Manager):
     def create(
         self,
@@ -20,8 +32,8 @@ def create(
         prefix=knox_settings.TOKEN_PREFIX,
         **kwargs
     ):
-        token = prefix + crypto.create_token_string()
-        digest = crypto.hash_token(token)
+
+        digest, token = get_digest_token(prefix)
         if expiry is not None:
             expiry = timezone.now() + expiry
         instance = super().create(