1 (in-package :empire-web)
3 (declaim (optimize (space 0) (speed 0) (safety 3) (debug 3)))
6 (defvar *this-file* (load-time-value
7 (or #.*compile-file-pathname* *load-pathname*)))
9 (defvar *this-dir* (make-pathname :host (pathname-host *this-file*)
10 :device (pathname-device *this-file*)
11 :directory (pathname-directory *this-file*)))
13 (defparameter +templates-root+ (namestring *this-dir*))
14 (defparameter +root-url+ "/eow/")
15 (defparameter +web-root-base+ "/eow")
16 (defparameter +web-root+ (concatenate 'string +web-root-base+ "/"))
17 (defparameter +static-web-root+ (concatenate 'string +web-root+ "static/"))
18 (defparameter +static-files-root+ (concatenate 'string +templates-root+ "static/"))
19 (defparameter +login-page+ (concatenate 'string +static-web-root+ "login.html"))
20 (defparameter +root-page-file+ "root.html")
22 (defun string-starts-with (string prefix)
24 (let ((mismatch (mismatch string prefix :test #'char=)))
26 (>= mismatch (length prefix)))))
28 (defun serve-static ()
29 "Handle a request for a file under static/ directory"
30 (let* ((script-name (script-name))
31 (fname (subseq script-name (length +static-web-root+)))
32 (fullname (concatenate 'string +static-files-root+ fname)))
33 (handle-static-file fullname)))
37 :accessor update-queue
38 :initform (locked-queue:create)
39 :documentation "Updates to be sent to the browser")
42 :documentation "Connection to the empire game server")))
44 (defun make-session (username password)
45 (let* ((session (make-instance 'session))
46 (connection (empire:connect :user username
49 (setf (slot-value session 'connection) connection)
52 (defgeneric send (session string))
53 (defgeneric prompt (session minutes btus))
54 (defgeneric data (session message))
56 (defvar *empire-session*)
58 (defmacro with-session (&body body)
59 `(let ((*empire-session* (session-value 'session)))
62 (redirect +login-page+))))
65 "Send stream of updates to client"
67 (locked-queue:dequeue (update-queue *empire-session*))))
69 (defmethod send ((s session) string)
70 "Push a javascript update fragment to the client."
71 (locked-queue:enqueue (update-queue s) string))
73 (defmethod prompt ((s session) minutes btus)
74 (send s (format nil "prompt(~a,~a);~%" minutes btus)))
76 (defmethod data ((s session) message)
77 (send s (parenscript:ps* `(msg ,message))))
79 ;; destination of login-form
80 (defun login-action ()
82 (let ((session (make-session (post-parameter "username")
83 (post-parameter "password"))))
84 (setf (session-value 'session) session)
85 (redirect +root-url+))
86 (usocket:connection-refused-error (e)
87 (format nil "Connection error: ~a~%" e))))
89 (defun command-action ()
91 (empire:send-message (connection *empire-session*) (get-parameter "q"))))
95 (handle-static-file (concatenate 'string +static-files-root+ +root-page-file+))))
97 (defun dispatch (request)
98 (let ((script-name (script-name request)))
100 ((not (string-starts-with script-name +web-root+)) nil) ; do not handle this request
101 ((string= script-name "/eow/update") 'update)
102 ((string= script-name "/eow/login") 'login-action)
103 ((string= script-name "/eow/command") 'command-action)
104 ((or (string-equal script-name +web-root-base+)
105 (string-equal script-name +web-root+)) 'root-page) ; go to the start page
106 ((string-starts-with script-name +static-web-root+) 'serve-static)))) ; serve static file
110 (pushnew 'dispatch *dispatch-table* :test #'eq))