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kernel.js
167 lines | 4.9 KiB | application/javascript | JavascriptLexer
//----------------------------------------------------------------------------
// Copyright (C) 2008-2011 The IPython Development Team
//
// Distributed under the terms of the BSD License. The full license is in
// the file COPYING, distributed as part of this software.
//----------------------------------------------------------------------------
//============================================================================
// Kernel
//============================================================================
var IPython = (function (IPython) {
var utils = IPython.utils;
var Kernel = function () {
this.kernel_id = null;
this.base_url = "/kernels";
this.kernel_url = null;
this.shell_channel = null;
this.iopub_channel = null;
this.running = false;
this.username = "username";
this.session_id = utils.uuid();
if (typeof(WebSocket) !== 'undefined') {
this.WebSocket = WebSocket
} else if (typeof(MozWebSocket) !== 'undefined') {
this.WebSocket = MozWebSocket
} else {
alert('Your browser does not have WebSocket support, please try Chrome, Safari or Firefox 6. Firefox 4 and 5 are also supported by you have to enable WebSockets in about:config.');
};
};
Kernel.prototype.get_msg = function (msg_type, content) {
var msg = {
header : {
msg_id : utils.uuid(),
username : this.username,
session : this.session_id,
msg_type : msg_type
},
content : content,
parent_header : {}
};
return msg;
}
Kernel.prototype.start = function (notebook_id, callback) {
var that = this;
if (!this.running) {
var qs = $.param({notebook:notebook_id});
$.post(this.base_url + '?' + qs,
function (kernel_id) {
that._handle_start_kernel(kernel_id, callback);
},
'json'
);
};
};
Kernel.prototype.restart = function (callback) {
IPython.kernel_status_widget.status_restarting();
var url = this.kernel_url + "/restart";
var that = this;
if (this.running) {
this.stop_channels();
$.post(url,
function (kernel_id) {
that._handle_start_kernel(kernel_id, callback);
},
'json'
);
};
};
Kernel.prototype._handle_start_kernel = function (json, callback) {
this.running = true;
this.kernel_id = json.kernel_id;
this.ws_url = json.ws_url;
this.kernel_url = this.base_url + "/" + this.kernel_id;
this.start_channels();
callback();
IPython.kernel_status_widget.status_idle();
};
Kernel.prototype.start_channels = function () {
this.stop_channels();
var ws_url = this.ws_url + this.kernel_url;
console.log("Starting WS:", ws_url);
this.shell_channel = new this.WebSocket(ws_url + "/shell");
this.iopub_channel = new this.WebSocket(ws_url + "/iopub");
send_cookie = function(){
this.send(document.cookie);
console.log(this);
}
this.shell_channel.onopen = send_cookie;
this.iopub_channel.onopen = send_cookie;
};
Kernel.prototype.stop_channels = function () {
if (this.shell_channel !== null) {
this.shell_channel.close();
this.shell_channel = null;
};
if (this.iopub_channel !== null) {
this.iopub_channel.close();
this.iopub_channel = null;
};
};
Kernel.prototype.execute = function (code) {
var content = {
code : code,
silent : false,
user_variables : [],
user_expressions : {},
allow_stdin : false,
};
var msg = this.get_msg("execute_request", content);
this.shell_channel.send(JSON.stringify(msg));
return msg.header.msg_id;
}
Kernel.prototype.complete = function (line, cursor_pos) {
var content = {
text : '',
line : line,
cursor_pos : cursor_pos
};
var msg = this.get_msg("complete_request", content);
this.shell_channel.send(JSON.stringify(msg));
return msg.header.msg_id;
}
Kernel.prototype.interrupt = function () {
if (this.running) {
$.post(this.kernel_url + "/interrupt");
};
};
Kernel.prototype.kill = function () {
if (this.running) {
this.running = false;
var settings = {
cache : false,
type : "DELETE",
};
$.ajax(this.kernel_url, settings);
};
};
IPython.Kernel = Kernel;
return IPython;
}(IPython));