blob: 5e44158a8c58d0fa4ffcbf45b232ba9eda28a51b (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
|
(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.")
(defconstant +timeout-seconds+ 5
"Global timeout. The program will exit at the end of this delay.")
(defun main ()
(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*)))))
(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)))
(if (target-attached-to-target-msg-p response)
(reload-extension (json-obj-get
(json-obj-get response "params")
"sessionId")))
(when (and (reload-current-tab config)
(runtime-evaluate-msg-p response))
(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."
;; 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*)
(websocket-send
(ws-client *config*)
(runtime-evaluate-msg
(next-call-id *devtools-secondary-call-id*)
session-id
"chrome.tabs.reload()")))
(defun extension-targets (targets)
"Filter `targets`, returning a list of targets corresponding to extensions."
(labels ((extensionp (target)
(string= (json-obj-get target "type")
"background_page")))
(filter #'extensionp targets)))
(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*))
|
