Allow autoload. Move cursor to the beginning of buffer.
(defvar my/spring-actuator-server-history nil)
(defvar my/spring-actuator-last-server "http://localhost:8080")
(defvar my/spring-actuator-path-history nil)
(defvar my/spring-actuator-path-completion
'("actuator" "auditevents" "autoconfig" "beans" "configprops" "dump" "env" "flyway" "health" "heapdump"
"info" "jolokia" "liquibase" "logfile" "loggers" "mappings" "metrics" "shutdown" "trace")))
;;;###autoload
(defun my/spring-actuator (server path)
(interactive (list (read-string "Server: " my/spring-actuator-last-server 'my/spring-actuator-server-history)
(completing-read "Path: " my/spring-actuator-path-completion nil nil "" 'my/spring-actuator-path-history)))
(setq my/spring-actuator-last-server server)
(let ( (bufname (format "actuator: %s" path)) )
(when (get-buffer bufname)
(kill-buffer bufname))
(switch-to-buffer (url-retrieve-synchronously (format "%s/%s" server path)))
(rename-buffer bufname)
(goto-char (point-min))
(re-search-forward "^$" nil 'move)
(forward-char)
(delete-region (point-min) (point))
(json-pretty-print-buffer)
(goto-char (point-min))
(json-mode) ))