59 lines
2.2 KiB
Python
59 lines
2.2 KiB
Python
from flask import Blueprint, request, redirect, flash
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from auth import require_level
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from config_utils import load_core, save_core, verify_core_hash, queued_msg
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import sanitize
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import validation as validate
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bp = Blueprint('action_apply_upstream_dns', __name__)
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@bp.route('/action/apply_upstream_dns', methods=['POST'])
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@require_level('administrator')
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def apply_upstream_dns():
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strict_order = 'strict_order' in request.form
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cache_size_raw = request.form.get('cache_size', '').strip()
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submitted = request.form.getlist('upstream_servers')
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for s in submitted:
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if not s.strip():
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flash('Remove blank server entries before saving.', 'error')
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return redirect('/view/view_upstream_dns')
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upstream_servers = []
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for s in submitted:
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clean = sanitize.ip(s.strip())
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if not clean:
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flash(f"'{s.strip()}' is not a valid IP address.", 'error')
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return redirect('/view/view_upstream_dns')
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upstream_servers.append(clean)
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cache_size = validate.int_range(cache_size_raw, 0, None)
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if cache_size is None:
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flash('Cache Size must be a non-negative integer.', 'error')
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return redirect('/view/view_upstream_dns')
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if not verify_core_hash(request.form.get('config_hash', '')):
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flash('Configuration was modified by another session. Please refresh and try again.', 'error')
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return redirect('/view/view_upstream_dns')
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core = load_core()
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current = core.get('upstream_dns', {})
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if (strict_order == bool(current.get('strict_order', False)) and
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cache_size == int(current.get('cache_size', 0)) and
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upstream_servers == current.get('upstream_servers', [])):
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flash('No changes detected.', 'info')
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return redirect('/view/view_upstream_dns')
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core.setdefault('upstream_dns', {}).update({
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'strict_order': strict_order,
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'cache_size': cache_size,
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'upstream_servers': upstream_servers,
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})
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errors = validate.validate_config(core)
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if errors:
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for msg in errors:
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flash(msg, 'error')
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return redirect('/view/view_upstream_dns')
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save_core(core)
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flash(queued_msg('core apply'), 'success')
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return redirect('/view/view_upstream_dns')
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