fix printer batch vendor resolution + base url

plugins/printers/api/asset_routes.py

@@ -364,12 +364,29 @@ UNIVERSAL_INSTALL_VENDORS = frozenset({'HP', 'Xerox'})
 
 def _batch_base_url():
     """Base URL the generated .bat downloads installers from. Prefer the
-    configured site_base_url (already includes the /shopdb mount); fall back to
-    the request root so a site that never set it still produces a usable batch."""
+    configured site_base_url (it already includes scheme + the /shopdb mount).
+
+    Fallback matters: behind IIS the app sees http on a loopback port and its
+    url_root drops the mount, so a naive request.url_root yields a broken
+    http://127.0.0.1/installers/... URL. Rebuild from the forwarded Host + the
+    mount (script_root) and force https instead."""
     base = (Setting.get('site_base_url') or '').strip().rstrip('/')
     if base:
         return base
-    return request.url_root.rstrip('/')
+    host = request.headers.get('X-Forwarded-Host') or request.host
+    root = (request.script_root or '').rstrip('/')
+    return 'https://%s%s' % (host, root)
+
+
+def _printer_vendor(printer):
+    """Vendor name for install grouping. The legacy import sets the printer's
+    model but not its direct vendorid, so resolve via the model's vendor (as the
+    classic installprinter.asp did) when the printer has no direct vendor."""
+    if printer.vendor:
+        return (printer.vendor.vendor or '').strip()
+    if printer.model and printer.model.vendor:
+        return (printer.model.vendor.vendor or '').strip()
+    return ''
 
 
 def _installer_url(installpath, base):
@@ -429,7 +446,7 @@ def printer_install_batch():
         name = _install_name(printer, asset)
         if not name:
             continue
-        vendor = (printer.vendor.vendor if printer.vendor else '').strip()
+        vendor = _printer_vendor(printer)
         installpath = (printer.installpath or '').strip()
         if vendor in UNIVERSAL_INSTALL_VENDORS:
             universal.append(name)