fix: avoid \x00 in regex validator (again...)

ietf/doc/migrations/0026_alter_dochistory_title_alter_document_title.py

@@ -0,0 +1,41 @@
+# Copyright The IETF Trust 2025, All Rights Reserved
+
+import django.core.validators
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ("doc", "0025_storedobject_storedobject_unique_name_per_store"),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name="dochistory",
+            name="title",
+            field=models.CharField(
+                max_length=255,
+                validators=[
+                    django.core.validators.ProhibitNullCharactersValidator,
+                    django.core.validators.RegexValidator(
+                        message="Please enter a string without control characters.",
+                        regex="^[^\x01-\x1f]*$",
+                    ),
+                ],
+            ),
+        ),
+        migrations.AlterField(
+            model_name="document",
+            name="title",
+            field=models.CharField(
+                max_length=255,
+                validators=[
+                    django.core.validators.ProhibitNullCharactersValidator,
+                    django.core.validators.RegexValidator(
+                        message="Please enter a string without control characters.",
+                        regex="^[^\x01-\x1f]*$",
+                    ),
+                ],
+            ),
+        ),
+    ]

ietf/doc/models.py

@@ -20,7 +20,11 @@
 from django.core import checks
 from django.core.files.base import File
 from django.core.cache import caches
-from django.core.validators import URLValidator, RegexValidator
+from django.core.validators import (
+    URLValidator,
+    RegexValidator,
+    ProhibitNullCharactersValidator,
+)
 from django.urls import reverse as urlreverse
 from django.contrib.contenttypes.models import ContentType
 from django.conf import settings
@@ -107,7 +111,13 @@ class DocumentInfo(models.Model):
     time = models.DateTimeField(default=timezone.now) # should probably have auto_now=True
 
     type = ForeignKey(DocTypeName, blank=True, null=True) # Draft, Agenda, Minutes, Charter, Discuss, Guideline, Email, Review, Issue, Wiki, External ...
-    title = models.CharField(max_length=255, validators=[validate_no_control_chars, ])
+    title = models.CharField(
+        max_length=255,
+        validators=[
+            ProhibitNullCharactersValidator,
+            validate_no_control_chars,
+        ],
+    )
 
     states = models.ManyToManyField(State, blank=True) # plain state (Active/Expired/...), IESG state, stream state
     tags = models.ManyToManyField(DocTagName, blank=True) # Revised ID Needed, ExternalParty, AD Followup, ...

ietf/utils/validators.py

@@ -33,8 +33,9 @@
 # Note that this is an instantiation of the regex validator, _not_ the
 # regex-string validator defined right below
 validate_no_control_chars = RegexValidator(
-                                    regex="^[^\x00-\x1f]*$",
-                                    message="Please enter a string without control characters." )
+    regex="^[^\x01-\x1f]*$",
+    message="Please enter a string without control characters.",
+)
 
 
 @deconstructible