The output of the command "vnstat --dbiflist 1" is empty when there are
no interfaces in the database. Add a check to avoid a "result.stdout is
undefined" error in that case.
Ref: https://forum.openwrt.org/t/error-in-luci-vnstat2-configuration-menu/179700
Fixes: 3ac4f567df ("luci-app-vnstat2: use more efficient way to get database interfaces")
Signed-off-by: Jan Hoffmann <jan@3e8.eu>
The currently used command "vnstat --json f 1" can be very slow when the
database contains many entries. This can result in an XHR timeout error
on the configuration page.
Use the "--dbiflist" option instead, which was added in vnStat 2.7.
Fixes: #6702
Signed-off-by: Jan Hoffmann <jan@3e8.eu>
Modern browsers allow decomposing table markup equally well as nested div
constructs, therefor migrate our <div> table markup to actual <table> tags
but keep the old table/tr/th/td CSS classes for now to allow for a smooth
theme transition.
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
