ksmb app no longer works, impossible to create network shares

[borkra]

• Form to enter share information not visible
• Hitting save on the form result in "Unexpected reply data format." message

[jow-]

• Please mention the exact version of LuCI you're running (opkg list-installed luci-base)
• Please mention the exact version of uhttpd (opkg list-installed uhttpd)
• Please try commenting out option ubus_prefix '/ubus' in /etc/config/uhttpd, restart uhttpd, close and reopen the LuCI browser tab or try logging in using an incognito window and see if the issue persists.

[borkra]

@jow Version everything master, fetched from git and rebuilt everything yesterday evening.

luci-base - git-20.267.53658-b17ec09
uhttpd - 2020-09-18-47c34bd6-1

Commenting out "option ubus_prefix '/ubus'" fixes ksmbd

One more issue constant hangs after login, logout and few other pages. If wait long enough get "XHR request timed out"
Tried with browser Firefox 81 and Edge/Chrome 85, on Linux and Windows.

With commented "option ubus_prefix '/ubus'", get "No related RPC reply" message on Log In and Log Out, and maybe other screens, and no hang any more

[borkra]

It looks like this commit causing the issue:
https://git.openwrt.org/?p=project/uhttpd.git;a=commit;h=11723570af9cb7bd87842e79c85ee99530be9902

Reverting uhttpd to the 2020-08-05 version fixes the problem.

Most like likely this hack does not cover all cases:

+       /* Treat both: /foo AND /foo/ as legacy requests. */
+       if (ops->path_match(conf.ubus_prefix, url) && strlen(url) - strlen(conf.ubus_prefix) <= 1) {
+               du->legacy = true;
+               uh_ubus_data_done(cl);
+               return;
+       }

[borkra]

@rmilecki could you please look into this uhttpd issue