[kio-extras] [Bug 489288] New: File transfer fails if it contains a question mark, semicolon or quotes

[Andrea Ippolito]

https://bugs.kde.org/show_bug.cgi?id=489288

            Bug ID: 489288
           Summary: File transfer fails if it contains a question mark,
                    semicolon or quotes
    Classification: Frameworks and Libraries
           Product: kio-extras
           Version: 24.05.1
          Platform: Other
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: MTP
          Assignee: unassigned-bugs at kde.org
          Reporter: andrea.ippo at gmail.com
                CC: elvis.angelaccio at kde.org
  Target Milestone: ---

I connected my Pixel 8 Pro to copy some (MP3) music from Dolphin.

When the copy process reaches certain files, it hangs indefinitely. Canceling
the process also makes the MTP device no longer usable until it's disconnected
and reconnected.

I tried to isolate the problem, and the files causing all contain some special
characters. The ones I could confirm to be causing trouble are `?`, `:`, `"`

Weirdly enough, if I try to transfer a dummy TEXT file instead (containing one
of those chars), I get immediately a popup informing me the file cannot be
transferred.

This is not the case when transferring MP3s, though. Even if I try to transfer
just ONE MP3 containing one of those characters, the copy still starts without
any warning, and hangs.

If I expand the ongoing copy notification, I can see that the target file name
contains the special character as an URL-escaped sequence (e.g. `%3F` for `?`)

Attaching logs from journalctl

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