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Enhance hostname validation and update help text in forms.py

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This commit is contained in:
Eduardo Silva
2026-02-10 10:55:12 -03:00
parent 2d7dfd2399
commit 2275684fd4
2 changed files with 27 additions and 12 deletions
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32
dns/forms.py
View File

@@ -63,7 +63,7 @@ class StaticHostForm(forms.ModelForm):
self.helper = FormHelper()
self.helper.form_method = 'post'
self.fields['hostname'].label = _('Hostname')
self.fields['hostname'].help_text = _('Hostname or wildcard domain (e.g. *.example.com)')
self.fields['hostname'].help_text = _('Exact hostname or domain rule (e.g. *.example.com matches example.com and all subdomains)')
self.fields['ip_address'].label = _('IP Address')
back_label = _('Back')
delete_label = _('Delete')
@@ -77,7 +77,7 @@ class StaticHostForm(forms.ModelForm):
Div(
Field('hostname', css_class='form-control'),
Field('ip_address', css_class='form-control'),
css_class='col-md-6'
css_class='col-md-12'
),
),
FormActions(
@@ -90,12 +90,28 @@ class StaticHostForm(forms.ModelForm):
def clean(self):
cleaned_data = super().clean()
hostname = cleaned_data.get('hostname')
if hostname:
# Allow plain hostname (e.g. example.com) or wildcard (e.g. *.example.com)
plain_regex = r'^[a-zA-Z0-9]([a-zA-Z0-9-\.]*[a-zA-Z0-9])?$'
wildcard_regex = r'^\*\.([a-zA-Z0-9]([a-zA-Z0-9-\.]*[a-zA-Z0-9])?)$'
if not (re.match(plain_regex, hostname) or re.match(wildcard_regex, hostname)):
raise ValidationError(_('Invalid hostname. Use a hostname (e.g. example.com) or wildcard (e.g. *.example.com).'))
if not hostname:
raise ValidationError(_('Invalid hostname.'))
hostname = hostname.strip().lower()
if '://' in hostname or '/' in hostname or ':' in hostname:
raise ValidationError(_('Invalid hostname.'))
domain = hostname[2:] if hostname.startswith('*.') else hostname
labels = domain.split('.')
if len(labels) < 2:
raise ValidationError(_('Invalid hostname.'))
for label in labels:
if not label:
raise ValidationError(_('Invalid hostname.'))
if not re.match(r'^[a-z0-9-]+$', label):
raise ValidationError(_('Invalid hostname.'))
if label.startswith('-') or label.endswith('-'):
raise ValidationError(_('Invalid hostname.'))
cleaned_data['hostname'] = hostname
return cleaned_data

7
dns/functions.py
View File

@@ -124,12 +124,11 @@ bind-interfaces
if static_hosts:
dnsmasq_config += '\n'
for static_host in static_hosts:
# dnsmasq uses /.example.com/ for wildcards (matches *.example.com and example.com)
hostname = static_host.hostname.strip().lower()
if static_host.hostname.startswith('*.'):
dnsmasq_domain = '.' + static_host.hostname[2:]
dnsmasq_config += f'address=/{hostname[1:]}/{static_host.ip_address}\n'
else:
dnsmasq_domain = static_host.hostname
dnsmasq_config += f'address=/{dnsmasq_domain}/{static_host.ip_address}\n'
dnsmasq_config += f'host-record={hostname},{static_host.ip_address}\n'
if dns_lists:
dnsmasq_config += '\n'