(defun my/dwim-shell-command/0x0-upload ()
  "Upload the marked files to 0x0.st"
  (interactive)
  (let ((url "https://0x0.st"))
    (dwim-shell-command-on-marked-files
     "0x0 upload"
     (format "curl -Ffile=@<<f>> -Fsecret= %s" url)
     :utils "curl"
     :post-process-template
     ;; Insert the single quotes at the appropriate place according to
     ;; 0x0.st example online:
     ;; curl -F'file=@yourfile.png' -Fsecret= https://0x0.st
     ;;
     ;; The placement of these single quotes confuse the escaping
     ;; mechanisms of dwim-shell-command, as it considers @ as the
     ;; opening 'quote' as it appears right in front of <<f>>.
     (lambda (template path)
       (string-replace "-Ffile" "-F'file"
                       (string-replace path (concat path "'") template))))))