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;;; Copyright (c) 2021 Teddy Wing
;;;
;;; This file is part of Extreload.
;;;
;;; Extreload is free software: you can redistribute it and/or modify
;;; it under the terms of the GNU General Public License as published by
;;; the Free Software Foundation, either version 3 of the License, or
;;; (at your option) any later version.
;;;
;;; Extreload is distributed in the hope that it will be useful,
;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;;; GNU General Public License for more details.
;;;
;;; You should have received a copy of the GNU General Public License
;;; along with Extreload. If not, see <https://www.gnu.org/licenses/>.
(in-package :extreload)
(defvar *wg* (wait-group:make-wait-group))
(defvar *devtools-root-call-id* (make-instance 'call-id)
"DevTools Protocol call ID.")
(defvar *devtools-secondary-call-id* (make-instance 'call-id)
"DevTools Protocol call ID used for messages to individual target sessions.")
(defvar *extensions* '()
"TODO")
(defconstant +timeout-seconds+ 10
"Global timeout. The program will exit at the end of this delay.")
(defun main ()
(handler-case
(interrupt:with-user-abort
(handler-bind ((error #'(lambda (e)
(exit-with-error e sysexits:+unavailable+))))
;; Store the config as a global.
(defvar *config* (parse-options))
(trivial-timeout:with-timeout (+timeout-seconds+)
(with-websocket-connection ((ws-client *config*))
(wsd:on :message (ws-client *config*)
#'(lambda (message)
(ws-on-message
message
(extension-ids *config*)
*config*)))
(websocket-send
(ws-client *config*)
(target-get-targets-msg
(next-call-id *devtools-root-call-id*)))
(wait-group:wait *wg*)))))
;; Control-c
(interrupt:user-abort ()
(opts:exit sysexits:+ok+))))
(defun ws-on-message (message extension-ids config)
"Called when a WebSocket message is received."
(let* ((response (jsown:parse message))
(targets (parse-get-targets-response response)))
(when (debug-output config)
(format t "Response: ~a~%" response)
(format t "~a~%" *wg*))
(when targets
(let ((targets (extension-targets targets)))
(attach-extensions targets extension-ids)))
;; TODO: Force to attach a second time
(when (target-attached-to-target-msg-p response)
(when (and (reload-current-tab config)
(target-attached-to-target-msg-manifest-v3-extension-p response))
;; response is an extension in *extensions*
(format t "RELOADING TAB: ~a~%"
(json-obj-get
(json-obj-get response "params")
"sessionId"))
(reload-tab (json-obj-get
(json-obj-get response "params")
"sessionId"))
; (return-from ws-on-message)
)
(track-service-worker-target response)
(reload-extension (json-obj-get
(json-obj-get response "params")
"sessionId")))
(format t "EXTENSIONS: ~a~%" *extensions*)
(when (and (reload-current-tab config)
(inspector-target-crashed-msg-p response))
;; Attach to target again
;; then somehow reload the tab
;; And need to only do this for MV3 extensions
;; Loop through *extensions*, if sessionId matches, then send attach message to extension
;; Need to get new targets, and attach to all MV3 extensions again
(websocket-send
(ws-client *config*)
(target-get-targets-msg
(next-call-id *devtools-root-call-id*)))
)
(when (and (reload-current-tab config)
(runtime-evaluate-msg-p response))
(websocket-send
(ws-client *config*)
(target-get-targets-msg
(next-call-id *devtools-root-call-id*)))
; (reload-tab (json-obj-get
; (json-obj-get response "result")
; "sessionId"))
)
;; Failed to reload tab.
(when (runtime-evaluate-exception-p response)
;; `reload-tab` adds an extra increment to the wait group. If the call
;; fails, we only receive one message instead of two, so the wait group
;; must be decremented to match.
(wait-group:done *wg*)
(reload-tab (json-obj-get response "sessionId")))
(wait-group:done *wg*)))
(defun json-obj-get (obj key)
"Get the value of `key` from `obj` (a `jsown` object). Return nil if `key` is
not defined."
(handler-case
(jsown:val obj key)
(simple-error (e)
(let ((s (format nil "~A" e)))
(if (search "not available" s)
nil)))))
(defun attach-extensions (targets extension-ids)
"Attach to all extensions in `targets` that match the IDs in
`extension-ids`."
(labels ((requested-extension-p (target)
(find-if
#'(lambda (id)
(uiop:string-prefix-p
(concatenate 'string "chrome-extension://" id)
(json-obj-get target "url")))
extension-ids)))
(dolist (extension (filter #'requested-extension-p targets))
(attach-to-target extension))))
(defun attach-to-target (extension)
"Send a message to the target in `extension` asking to attach to the target."
(let ((target-id (json-obj-get extension "targetId")))
(websocket-send (ws-client *config*)
(target-attach-to-target-msg
(next-call-id *devtools-root-call-id*)
target-id))))
(defun reload-extension (session-id)
"Send a message to an extension page corresponding to `session-id`, telling
the target extension to reload itself."
(websocket-send
(ws-client *config*)
(runtime-evaluate-msg
(next-call-id *devtools-secondary-call-id*)
session-id
"chrome.runtime.reload()")))
(defun reload-tab (session-id)
"Send a message to an extension page corresponding to `session-id`, telling
the target to reload the current tab."
(format t "DO THE RELOAD~%")
;; Two response messages always come back from the `chrome.tabs.reload()`
;; messages, so we need to add a second increment to the wait group.
(wait-group:add *wg*)
(sleep 1)
(format t "DO THE RELOAD~%")
(websocket-send
(ws-client *config*)
(runtime-evaluate-msg
(next-call-id *devtools-secondary-call-id*)
session-id
"chrome.tabs.reload()"))
(format t "Did THE RELOAD~%")
)
(defun extension-targets (targets)
"Filter `targets`, returning a list of targets corresponding to extensions."
(labels ((extensionp (target)
(or
(string= (json-obj-get target "type")
"background_page")
;; TODO: This might require us to re-attach to the service worker after chrome.runtime.reload
;; Compare MV2 and MV3 debug output
(string= (json-obj-get target "type")
"service_worker"))))
(filter #'extensionp targets)))
(defun track-service-worker-target (target)
"TODO"
(let* ((params (json-obj-get target "params"))
(target-info (json-obj-get params "targetInfo")))
(when (string= (json-obj-get target-info "type")
"service_worker")
(push
(make-instance 'extension
:id (subseq
(json-obj-get target-info "url")
;; Remove "chrome-extension://".
19
;; Extension IDs are 32 characters long.
(+ 19 32))
:url (json-obj-get target-info "url")
:session-id (json-obj-get params "sessionId"))
*extensions*))))
(defun target-attached-to-target-msg-manifest-v3-extension-p (msg)
"Return true if the Target.attachedToTarget message `msg` corresonds to a
tracked Manifest V3 extension."
(>=
(length
(filter
#'(lambda (extension)
(string= (json-obj-get
(json-obj-get
(json-obj-get msg "params")
"targetInfo")
"url")
(url extension)))
*extensions*))
1))
(defun manifest-v3-extension-p (extension)
"Return true if `extension` is in our list of tracked Manifest V3 extensions."
(filter
#'(lambda (ext)
())
*extensions*))
(defun websocket-send (client data)
"Send `data` to WebSocket `client` and increment `*wg*`."
(when (debug-output *config*)
(format t "Sending: ~a~%" data))
(wsd:send client data)
(wait-group:add *wg*))
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