mirror of
https://github.com/vale981/emacs-ipython-notebook
synced 2025-03-05 17:11:41 -05:00
c88da06bec
URL was fixed in the previous version. As Emacs does not know URL of IPython web server like JS does implicitly by page location, I need to pass URL around in notebook list/notebook/kernel. I add `url-or-port' slot to each structs so it is easy to get URL from the struct.
266 lines
9.1 KiB
EmacsLisp
266 lines
9.1 KiB
EmacsLisp
;;; ein-kernel.el --- Communicate with IPython notebook server
|
|
|
|
;; Copyright (C) 2012- Takafumi Arakaki
|
|
|
|
;; Author: Takafumi Arakaki
|
|
|
|
;; This file is NOT part of GNU Emacs.
|
|
|
|
;; ein-kernel.el 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.
|
|
|
|
;; ein-kernel.el 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 ein-kernel.el. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
;;; Commentary:
|
|
|
|
;;
|
|
|
|
;;; Code:
|
|
|
|
(eval-when-compile (require 'cl))
|
|
|
|
(require 'ein-log)
|
|
(require 'ein-utils)
|
|
(require 'ein-websocket)
|
|
(require 'url)
|
|
|
|
|
|
(defstruct ein:$kernel
|
|
"Hold kernel variables.
|
|
|
|
`ein:$kernel-url-or-port'
|
|
URL or port of IPython server.
|
|
|
|
FIXME: document other slots."
|
|
url-or-port
|
|
kernel-id
|
|
shell-channel
|
|
iopub-channel
|
|
base-url
|
|
kernel-url
|
|
ws-url
|
|
running
|
|
username
|
|
session-id)
|
|
|
|
(defvar ein:base-kernel-url "/")
|
|
;; Currently there is no way to know this setting. Maybe I should ask
|
|
;; IPython developers for an API to get this from notebook server.
|
|
|
|
|
|
(defun ein:kernel-init ()
|
|
(make-ein:$kernel
|
|
:kernel-id nil
|
|
:shell-channel nil
|
|
:iopub-channel nil
|
|
:base-url (concat ein:base-kernel-url "kernels")
|
|
:running nil
|
|
:username "username"
|
|
:session-id (ein:utils-uuid)))
|
|
|
|
|
|
(defun ein:kernel-get-msg (kernel msg-type content)
|
|
(list
|
|
:header (list
|
|
:msg_id (ein:utils-uuid)
|
|
:username (ein:$kernel-username kernel)
|
|
:session (ein:$kernel-session-id kernel)
|
|
:msg_type msg-type)
|
|
:content content
|
|
:parent_header (make-hash-table)))
|
|
|
|
|
|
(defun ein:kernel-start
|
|
(kernel url-or-port notebook-id callback &optional cbargs)
|
|
"Start kernel of the notebook whose id is NOTEBOOK-ID.
|
|
CALLBACK is called after kernel is started with optional argument CBARGS."
|
|
(unless (ein:$kernel-running kernel)
|
|
(setf (ein:$kernel-url-or-port kernel) url-or-port)
|
|
(let* ((qs (format "notebook=%s" notebook-id))
|
|
(url (concat (ein:url url-or-port (ein:$kernel-base-url kernel))
|
|
"?" qs))
|
|
(url-request-method "POST"))
|
|
(url-retrieve
|
|
url
|
|
(lambda (status kernel callback cbargs)
|
|
(ein:kernel--handle-start-kernel kernel (ein:json-read) callback
|
|
cbargs)
|
|
(kill-buffer (current-buffer)))
|
|
(list kernel callback cbargs)))))
|
|
|
|
|
|
(defun ein:kernel-restart (kernel callback &optional cbargs)
|
|
(ein:log 'info "Restarting kernel")
|
|
(when (ein:$kernel-running kernel)
|
|
(ein:kernel-stop-channels kernel)
|
|
(let ((url (concat (ein:$kernel-kernel-url kernel) "/restart")))
|
|
(url-retrieve
|
|
url
|
|
(lambda (status kernel callback cbargs)
|
|
(ein:kernel--handle-start-kernel kernel (ein:json-read) callback
|
|
cbargs)
|
|
(kill-buffer (current-buffer)))
|
|
(list kernel callback cbargs)))))
|
|
|
|
|
|
(defun ein:kernel--handle-start-kernel (kernel json callback &optional cbargs)
|
|
(setf (ein:$kernel-running kernel) t)
|
|
(setf (ein:$kernel-kernel-id kernel) (plist-get json :kernel_id))
|
|
(setf (ein:$kernel-ws-url kernel) (plist-get json :ws_url))
|
|
(setf (ein:$kernel-kernel-url kernel)
|
|
(concat (ein:$kernel-base-url kernel) "/"
|
|
(ein:$kernel-kernel-id kernel)))
|
|
(ein:kernel-start-channels kernel)
|
|
(apply callback cbargs))
|
|
|
|
|
|
(defun ein:kernel--websocket-closed (kernel ws-url early)
|
|
;; FIXME: `message' is not good choice for showing multiple line
|
|
;; message. I should implement ein-pager.el first and show the
|
|
;; message using its function.
|
|
(if early
|
|
(ein:log 'warn
|
|
"Websocket connection to %s could not be established. \
|
|
You will NOT be able to run code. \
|
|
Your websocket.el may not be compatible with the websocket version in \
|
|
the server, or if the url does not look right, there could be an \
|
|
error in the server's configuration." ws-url)
|
|
(ein:log 'warn "Websocket connection closed unexpectedly. \
|
|
The kernel will no longer be responsive.")))
|
|
|
|
|
|
(defun ein:kernel-send-cookie (channel)
|
|
;; This is required to open channel. In IPython's kernel.js, it sends
|
|
;; `document.cookie'. This is an empty string anyway.
|
|
(ein:websocket-send channel ""))
|
|
|
|
|
|
(defun ein:kernel--ws-closed-callback (websocket kernel arg)
|
|
;; NOTE: The argument ARG should not be "unpacked" using `&rest'.
|
|
;; It must be given as a list to hold state `already-called-onclose'
|
|
;; so it can be modified in this function.
|
|
(destructuring-bind (&key already-called-onclose ws-url early)
|
|
arg
|
|
(unless already-called-onclose
|
|
(plist-put arg :already-called-onclose t)
|
|
(unless (ein:$websocket-closed-by-client websocket)
|
|
;; Use "event-was-clean" when it is implemented in websocket.el.
|
|
(ein:kernel--websocket-closed kernel ws-url early)))))
|
|
|
|
|
|
(defun ein:kernel-start-channels (kernel)
|
|
(ein:kernel-stop-channels kernel)
|
|
(let* ((ws-url (concat (ein:$kernel-ws-url kernel)
|
|
(ein:$kernel-kernel-url kernel)))
|
|
(onclose-arg (list :ws-url ws-url
|
|
:already-called-onclose nil
|
|
:early t)))
|
|
(ein:log 'info "Starting WS: %S" ws-url)
|
|
(setf (ein:$kernel-shell-channel kernel)
|
|
(ein:websocket (concat ws-url "/shell")))
|
|
(setf (ein:$kernel-iopub-channel kernel)
|
|
(ein:websocket (concat ws-url "/iopub")))
|
|
|
|
(loop for c in (list (ein:$kernel-shell-channel kernel)
|
|
(ein:$kernel-iopub-channel kernel))
|
|
do (setf (ein:$websocket-onclose-args c) (list kernel onclose-arg))
|
|
do (setf (ein:$websocket-onopen c)
|
|
(lexical-let ((channel c))
|
|
(lambda () (ein:kernel-send-cookie channel))))
|
|
do (setf (ein:$websocket-onclose c)
|
|
#'ein:kernel--ws-closed-callback))
|
|
|
|
;; switch from early-close to late-close message after 1s
|
|
(run-at-time
|
|
1 nil
|
|
(lambda (onclose-arg)
|
|
(plist-put onclose-arg :early nil)
|
|
(ein:log 'debug "(via run-at-time) onclose-arg changed to: %S"
|
|
onclose-arg))
|
|
onclose-arg)))
|
|
|
|
;; NOTE: `onclose-arg' can be accessed as:
|
|
;; (nth 1 (ein:$websocket-onclose-args (ein:$kernel-shell-channel (ein:$notebook-kernel ein:notebook))))
|
|
|
|
|
|
(defun ein:kernel-stop-channels (kernel)
|
|
(when (ein:$kernel-shell-channel kernel)
|
|
(setf (ein:$websocket-onclose (ein:$kernel-shell-channel kernel)) nil)
|
|
(ein:websocket-close (ein:$kernel-shell-channel kernel))
|
|
(setf (ein:$kernel-shell-channel kernel) nil))
|
|
(when (ein:$kernel-iopub-channel kernel)
|
|
(setf (ein:$websocket-onclose (ein:$kernel-iopub-channel kernel)) nil)
|
|
(ein:websocket-close (ein:$kernel-iopub-channel kernel))
|
|
(setf (ein:$kernel-iopub-channel kernel) nil)))
|
|
|
|
|
|
(defun ein:kernel-object-info-request (kernel objname)
|
|
(when objname
|
|
(let* ((content (list :oname (format "%S" objname)))
|
|
(msg (ein:kernel-get-msg kernel "object_info_request" content)))
|
|
(ein:websocket-send
|
|
(ein:$kernel-shell-channel kernel)
|
|
(json-encode msg))
|
|
(plist-get (plist-get msg :header) :msg_id))))
|
|
|
|
|
|
(defun ein:kernel-execute (kernel code)
|
|
(let* ((content (list
|
|
:code code
|
|
:silent json-false
|
|
:user_variables []
|
|
:user_expressions (make-hash-table)
|
|
:allow_stdin json-false))
|
|
(msg (ein:kernel-get-msg kernel "execute_request" content)))
|
|
(ein:websocket-send
|
|
(ein:$kernel-shell-channel kernel)
|
|
(json-encode msg))
|
|
(plist-get (plist-get msg :header) :msg_id)))
|
|
|
|
|
|
(defun ein:kernel-complete (kernel line cursor-pos)
|
|
(let* ((content (list
|
|
:text ""
|
|
:line line
|
|
:cursor_pos cursor-pos))
|
|
(msg (ein:kernel-get-msg kernel "complete_request" content)))
|
|
(ein:websocket-send
|
|
(ein:$kernel-shell-channel kernel)
|
|
(json-encode msg))
|
|
(plist-get (plist-get msg :header) :msg_id)))
|
|
|
|
|
|
(defun ein:kernel-interrupt (kernel)
|
|
(when (ein:$kernel-running kernel)
|
|
(ein:log 'info "Interrupting kernel")
|
|
(url-retrieve (concat (ein:$kernel-kernel-url kernel) "/interrupt")
|
|
(lambda (s)
|
|
(ein:log 'info "Sent interruption command.")
|
|
(kill-buffer (current-buffer))))))
|
|
|
|
|
|
(defun ein:kernel-kill (kernel)
|
|
(when (ein:$kernel-running kernel)
|
|
(setf (ein:$kernel-running kernel) nil)
|
|
(let ((url-request-method "DELETE")
|
|
;; cache = false (http://api.jquery.com/jQuery.ajax/)
|
|
(url (concat (ein:$kernel-kernel-url kernel)
|
|
(format-time-string "?_=%s"))))
|
|
(url-retrieve
|
|
url
|
|
(lambda (s)
|
|
(ein:log 'info "Notebook kernel is killed")
|
|
(kill-buffer (current-buffer)))))))
|
|
|
|
|
|
(provide 'ein-kernel)
|
|
|
|
;;; ein-kernel.el ends here
|