|
|
//----------------------------------------------------------------------------
|
|
|
// 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
|
|
|
//============================================================================
|
|
|
|
|
|
/**
|
|
|
* @module IPython
|
|
|
* @namespace IPython
|
|
|
* @submodule Kernel
|
|
|
*/
|
|
|
|
|
|
var IPython = (function (IPython) {
|
|
|
|
|
|
var utils = IPython.utils;
|
|
|
|
|
|
// Initialization and connection.
|
|
|
/**
|
|
|
* A Kernel Class to communicate with the Python kernel
|
|
|
* @Class Kernel
|
|
|
*/
|
|
|
var Kernel = function (base_url) {
|
|
|
this.kernel_id = null;
|
|
|
this.shell_channel = null;
|
|
|
this.iopub_channel = null;
|
|
|
this.stdin_channel = null;
|
|
|
this.base_url = base_url;
|
|
|
this.running = false;
|
|
|
this.username = "username";
|
|
|
this.session_id = utils.uuid();
|
|
|
this._msg_callbacks = {};
|
|
|
|
|
|
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
|
|
|
},
|
|
|
metadata : {},
|
|
|
content : content,
|
|
|
parent_header : {}
|
|
|
};
|
|
|
return msg;
|
|
|
};
|
|
|
|
|
|
/**
|
|
|
* Start the Python kernel
|
|
|
* @method start
|
|
|
*/
|
|
|
Kernel.prototype.start = function (notebook_id) {
|
|
|
var that = this;
|
|
|
if (!this.running) {
|
|
|
var qs = $.param({notebook:notebook_id});
|
|
|
var url = this.base_url + '?' + qs;
|
|
|
$.post(url,
|
|
|
$.proxy(that._kernel_started,that),
|
|
|
'json'
|
|
|
);
|
|
|
};
|
|
|
};
|
|
|
|
|
|
/**
|
|
|
* Restart the python kernel.
|
|
|
*
|
|
|
* Emit a 'status_restarting.Kernel' event with
|
|
|
* the current object as parameter
|
|
|
*
|
|
|
* @method restart
|
|
|
*/
|
|
|
Kernel.prototype.restart = function () {
|
|
|
$([IPython.events]).trigger('status_restarting.Kernel', {kernel: this});
|
|
|
var that = this;
|
|
|
if (this.running) {
|
|
|
this.stop_channels();
|
|
|
var url = this.kernel_url + "/restart";
|
|
|
$.post(url,
|
|
|
$.proxy(that._kernel_started, that),
|
|
|
'json'
|
|
|
);
|
|
|
};
|
|
|
};
|
|
|
|
|
|
|
|
|
Kernel.prototype._kernel_started = function (json) {
|
|
|
console.log("Kernel started: ", json.kernel_id);
|
|
|
this.running = true;
|
|
|
this.kernel_id = json.kernel_id;
|
|
|
var ws_url = json.ws_url;
|
|
|
if (ws_url.match(/wss?:\/\//) == null) {
|
|
|
// trailing 's' in https will become wss for secure web sockets
|
|
|
prot = location.protocol.replace('http', 'ws') + "//";
|
|
|
ws_url = prot + location.host + ws_url;
|
|
|
};
|
|
|
this.ws_url = ws_url;
|
|
|
this.kernel_url = this.base_url + "/" + this.kernel_id;
|
|
|
this.start_channels();
|
|
|
$([IPython.events]).trigger('status_started.Kernel', {kernel: this});
|
|
|
};
|
|
|
|
|
|
|
|
|
Kernel.prototype._websocket_closed = function(ws_url, early) {
|
|
|
this.stop_channels();
|
|
|
$([IPython.events]).trigger('websocket_closed.Kernel',
|
|
|
{ws_url: ws_url, kernel: this, early: early}
|
|
|
);
|
|
|
};
|
|
|
|
|
|
/**
|
|
|
* Start the `shell`and `iopub` channels.
|
|
|
* Will stop and restart them if they already exist.
|
|
|
*
|
|
|
* @method start_channels
|
|
|
*/
|
|
|
Kernel.prototype.start_channels = function () {
|
|
|
var that = this;
|
|
|
this.stop_channels();
|
|
|
var ws_url = this.ws_url + this.kernel_url;
|
|
|
console.log("Starting WebSockets:", ws_url);
|
|
|
this.shell_channel = new this.WebSocket(ws_url + "/shell");
|
|
|
this.stdin_channel = new this.WebSocket(ws_url + "/stdin");
|
|
|
this.iopub_channel = new this.WebSocket(ws_url + "/iopub");
|
|
|
send_cookie = function(){
|
|
|
// send the session id so the Session object Python-side
|
|
|
// has the same identity
|
|
|
this.send(that.session_id + ':' + document.cookie);
|
|
|
};
|
|
|
var already_called_onclose = false; // only alert once
|
|
|
var ws_closed_early = function(evt){
|
|
|
if (already_called_onclose){
|
|
|
return;
|
|
|
}
|
|
|
already_called_onclose = true;
|
|
|
if ( ! evt.wasClean ){
|
|
|
that._websocket_closed(ws_url, true);
|
|
|
}
|
|
|
};
|
|
|
var ws_closed_late = function(evt){
|
|
|
if (already_called_onclose){
|
|
|
return;
|
|
|
}
|
|
|
already_called_onclose = true;
|
|
|
if ( ! evt.wasClean ){
|
|
|
that._websocket_closed(ws_url, false);
|
|
|
}
|
|
|
};
|
|
|
var channels = [this.shell_channel, this.iopub_channel, this.stdin_channel];
|
|
|
for (var i=0; i < channels.length; i++) {
|
|
|
channels[i].onopen = send_cookie;
|
|
|
channels[i].onclose = ws_closed_early;
|
|
|
}
|
|
|
// switch from early-close to late-close message after 1s
|
|
|
setTimeout(function() {
|
|
|
for (var i=0; i < channels.length; i++) {
|
|
|
if (channels[i] !== null) {
|
|
|
channels[i].onclose = ws_closed_late;
|
|
|
}
|
|
|
}
|
|
|
}, 1000);
|
|
|
this.shell_channel.onmessage = $.proxy(this._handle_shell_reply, this);
|
|
|
this.iopub_channel.onmessage = $.proxy(this._handle_iopub_reply, this);
|
|
|
this.stdin_channel.onmessage = $.proxy(this._handle_input_request, this);
|
|
|
|
|
|
$([IPython.events]).on('send_input_reply.Kernel', function(evt, data) {
|
|
|
that.send_input_reply(data);
|
|
|
});
|
|
|
};
|
|
|
|
|
|
/**
|
|
|
* Start the `shell`and `iopub` channels.
|
|
|
* @method stop_channels
|
|
|
*/
|
|
|
Kernel.prototype.stop_channels = function () {
|
|
|
var channels = [this.shell_channel, this.iopub_channel, this.stdin_channel];
|
|
|
for (var i=0; i < channels.length; i++) {
|
|
|
if ( channels[i] !== null ) {
|
|
|
channels[i].onclose = function (evt) {};
|
|
|
channels[i].close();
|
|
|
}
|
|
|
};
|
|
|
this.shell_channel = this.iopub_channel = this.stdin_channel = null;
|
|
|
};
|
|
|
|
|
|
// Main public methods.
|
|
|
|
|
|
/**
|
|
|
* Get info on object asynchronoulsy
|
|
|
*
|
|
|
* @async
|
|
|
* @param objname {string}
|
|
|
* @param callback {dict}
|
|
|
* @method object_info_request
|
|
|
*
|
|
|
* @example
|
|
|
*
|
|
|
* When calling this method pass a callbacks structure of the form:
|
|
|
*
|
|
|
* callbacks = {
|
|
|
* 'object_info_reply': object_info_reply_callback
|
|
|
* }
|
|
|
*
|
|
|
* The `object_info_reply_callback` will be passed the content object of the
|
|
|
*
|
|
|
* `object_into_reply` message documented in
|
|
|
* [IPython dev documentation](http://ipython.org/ipython-doc/dev/development/messaging.html#object-information)
|
|
|
*/
|
|
|
Kernel.prototype.object_info_request = function (objname, callbacks) {
|
|
|
if(typeof(objname)!=null && objname!=null)
|
|
|
{
|
|
|
var content = {
|
|
|
oname : objname.toString(),
|
|
|
};
|
|
|
var msg = this._get_msg("object_info_request", content);
|
|
|
this.shell_channel.send(JSON.stringify(msg));
|
|
|
this.set_callbacks_for_msg(msg.header.msg_id, callbacks);
|
|
|
return msg.header.msg_id;
|
|
|
}
|
|
|
return;
|
|
|
}
|
|
|
|
|
|
/**
|
|
|
* Execute given code into kernel, and pass result to callback.
|
|
|
*
|
|
|
* TODO: document input_request in callbacks
|
|
|
*
|
|
|
* @async
|
|
|
* @method execute
|
|
|
* @param {string} code
|
|
|
* @param [callbacks] {Object} With the optional following keys
|
|
|
* @param callbacks.'execute_reply' {function}
|
|
|
* @param callbacks.'output' {function}
|
|
|
* @param callbacks.'clear_output' {function}
|
|
|
* @param callbacks.'set_next_input' {function}
|
|
|
* @param {object} [options]
|
|
|
* @param [options.silent=false] {Boolean}
|
|
|
* @param [options.user_expressions=empty_dict] {Dict}
|
|
|
* @param [options.user_variables=empty_list] {List od Strings}
|
|
|
* @param [options.allow_stdin=false] {Boolean} true|false
|
|
|
*
|
|
|
* @example
|
|
|
*
|
|
|
* The options object should contain the options for the execute call. Its default
|
|
|
* values are:
|
|
|
*
|
|
|
* options = {
|
|
|
* silent : true,
|
|
|
* user_variables : [],
|
|
|
* user_expressions : {},
|
|
|
* allow_stdin : false
|
|
|
* }
|
|
|
*
|
|
|
* When calling this method pass a callbacks structure of the form:
|
|
|
*
|
|
|
* callbacks = {
|
|
|
* 'execute_reply': execute_reply_callback,
|
|
|
* 'output': output_callback,
|
|
|
* 'clear_output': clear_output_callback,
|
|
|
* 'set_next_input': set_next_input_callback
|
|
|
* }
|
|
|
*
|
|
|
* The `execute_reply_callback` will be passed the content and metadata
|
|
|
* objects of the `execute_reply` message documented
|
|
|
* [here](http://ipython.org/ipython-doc/dev/development/messaging.html#execute)
|
|
|
*
|
|
|
* The `output_callback` will be passed `msg_type` ('stream','display_data','pyout','pyerr')
|
|
|
* of the output and the content and metadata objects of the PUB/SUB channel that contains the
|
|
|
* output:
|
|
|
*
|
|
|
* http://ipython.org/ipython-doc/dev/development/messaging.html#messages-on-the-pub-sub-socket
|
|
|
*
|
|
|
* The `clear_output_callback` will be passed a content object that contains
|
|
|
* stdout, stderr and other fields that are booleans, as well as the metadata object.
|
|
|
*
|
|
|
* The `set_next_input_callback` will be passed the text that should become the next
|
|
|
* input cell.
|
|
|
*/
|
|
|
Kernel.prototype.execute = function (code, callbacks, options) {
|
|
|
|
|
|
var content = {
|
|
|
code : code,
|
|
|
silent : true,
|
|
|
user_variables : [],
|
|
|
user_expressions : {},
|
|
|
allow_stdin : false
|
|
|
};
|
|
|
callbacks = callbacks || {};
|
|
|
if (callbacks.input_request !== undefined) {
|
|
|
content.allow_stdin = true;
|
|
|
}
|
|
|
$.extend(true, content, options)
|
|
|
$([IPython.events]).trigger('execution_request.Kernel', {kernel: this, content:content});
|
|
|
var msg = this._get_msg("execute_request", content);
|
|
|
this.shell_channel.send(JSON.stringify(msg));
|
|
|
this.set_callbacks_for_msg(msg.header.msg_id, callbacks);
|
|
|
return msg.header.msg_id;
|
|
|
};
|
|
|
|
|
|
/**
|
|
|
* When calling this method pass a callbacks structure of the form:
|
|
|
*
|
|
|
* callbacks = {
|
|
|
* 'complete_reply': complete_reply_callback
|
|
|
* }
|
|
|
*
|
|
|
* The `complete_reply_callback` will be passed the content object of the
|
|
|
* `complete_reply` message documented
|
|
|
* [here](http://ipython.org/ipython-doc/dev/development/messaging.html#complete)
|
|
|
*
|
|
|
* @method complete
|
|
|
* @param line {integer}
|
|
|
* @param cursor_pos {integer}
|
|
|
* @param {dict} callbacks
|
|
|
* @param callbacks.complete_reply {function} `complete_reply_callback`
|
|
|
*
|
|
|
*/
|
|
|
Kernel.prototype.complete = function (line, cursor_pos, callbacks) {
|
|
|
callbacks = callbacks || {};
|
|
|
var content = {
|
|
|
text : '',
|
|
|
line : line,
|
|
|
cursor_pos : cursor_pos
|
|
|
};
|
|
|
var msg = this._get_msg("complete_request", content);
|
|
|
this.shell_channel.send(JSON.stringify(msg));
|
|
|
this.set_callbacks_for_msg(msg.header.msg_id, callbacks);
|
|
|
return msg.header.msg_id;
|
|
|
};
|
|
|
|
|
|
|
|
|
Kernel.prototype.interrupt = function () {
|
|
|
if (this.running) {
|
|
|
$([IPython.events]).trigger('status_interrupting.Kernel', {kernel: this});
|
|
|
$.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);
|
|
|
};
|
|
|
};
|
|
|
|
|
|
Kernel.prototype.send_input_reply = function (input) {
|
|
|
var content = {
|
|
|
value : input,
|
|
|
};
|
|
|
$([IPython.events]).trigger('input_reply.Kernel', {kernel: this, content:content});
|
|
|
var msg = this._get_msg("input_reply", content);
|
|
|
this.stdin_channel.send(JSON.stringify(msg));
|
|
|
return msg.header.msg_id;
|
|
|
};
|
|
|
|
|
|
|
|
|
// Reply handlers
|
|
|
|
|
|
Kernel.prototype.get_callbacks_for_msg = function (msg_id) {
|
|
|
var callbacks = this._msg_callbacks[msg_id];
|
|
|
return callbacks;
|
|
|
};
|
|
|
|
|
|
|
|
|
Kernel.prototype.set_callbacks_for_msg = function (msg_id, callbacks) {
|
|
|
this._msg_callbacks[msg_id] = callbacks || {};
|
|
|
}
|
|
|
|
|
|
|
|
|
Kernel.prototype._handle_shell_reply = function (e) {
|
|
|
var reply = $.parseJSON(e.data);
|
|
|
$([IPython.events]).trigger('shell_reply.Kernel', {kernel: this, reply:reply});
|
|
|
var header = reply.header;
|
|
|
var content = reply.content;
|
|
|
var metadata = reply.metadata;
|
|
|
var msg_type = header.msg_type;
|
|
|
var callbacks = this.get_callbacks_for_msg(reply.parent_header.msg_id);
|
|
|
if (callbacks !== undefined) {
|
|
|
var cb = callbacks[msg_type];
|
|
|
if (cb !== undefined) {
|
|
|
cb(content, metadata);
|
|
|
}
|
|
|
};
|
|
|
|
|
|
if (content.payload !== undefined) {
|
|
|
var payload = content.payload || [];
|
|
|
this._handle_payload(callbacks, payload);
|
|
|
}
|
|
|
};
|
|
|
|
|
|
|
|
|
Kernel.prototype._handle_payload = function (callbacks, payload) {
|
|
|
var l = payload.length;
|
|
|
// Payloads are handled by triggering events because we don't want the Kernel
|
|
|
// to depend on the Notebook or Pager classes.
|
|
|
for (var i=0; i<l; i++) {
|
|
|
if (payload[i].source === 'IPython.kernel.zmq.page.page') {
|
|
|
var data = {'text':payload[i].text}
|
|
|
$([IPython.events]).trigger('open_with_text.Pager', data);
|
|
|
} else if (payload[i].source === 'IPython.kernel.zmq.zmqshell.ZMQInteractiveShell.set_next_input') {
|
|
|
if (callbacks.set_next_input !== undefined) {
|
|
|
callbacks.set_next_input(payload[i].text)
|
|
|
}
|
|
|
}
|
|
|
};
|
|
|
};
|
|
|
|
|
|
|
|
|
Kernel.prototype._handle_iopub_reply = function (e) {
|
|
|
var reply = $.parseJSON(e.data);
|
|
|
var content = reply.content;
|
|
|
var msg_type = reply.header.msg_type;
|
|
|
var metadata = reply.metadata;
|
|
|
var callbacks = this.get_callbacks_for_msg(reply.parent_header.msg_id);
|
|
|
if (msg_type !== 'status' && callbacks === undefined) {
|
|
|
// Message not from one of this notebook's cells and there are no
|
|
|
// callbacks to handle it.
|
|
|
return;
|
|
|
}
|
|
|
var output_types = ['stream','display_data','pyout','pyerr'];
|
|
|
if (output_types.indexOf(msg_type) >= 0) {
|
|
|
var cb = callbacks['output'];
|
|
|
if (cb !== undefined) {
|
|
|
cb(msg_type, content, metadata);
|
|
|
}
|
|
|
} else if (msg_type === 'status') {
|
|
|
if (content.execution_state === 'busy') {
|
|
|
$([IPython.events]).trigger('status_busy.Kernel', {kernel: this});
|
|
|
} else if (content.execution_state === 'idle') {
|
|
|
$([IPython.events]).trigger('status_idle.Kernel', {kernel: this});
|
|
|
} else if (content.execution_state === 'restarting') {
|
|
|
$([IPython.events]).trigger('status_restarting.Kernel', {kernel: this});
|
|
|
} else if (content.execution_state === 'dead') {
|
|
|
this.stop_channels();
|
|
|
$([IPython.events]).trigger('status_dead.Kernel', {kernel: this});
|
|
|
};
|
|
|
} else if (msg_type === 'clear_output') {
|
|
|
var cb = callbacks['clear_output'];
|
|
|
if (cb !== undefined) {
|
|
|
cb(content, metadata);
|
|
|
}
|
|
|
};
|
|
|
};
|
|
|
|
|
|
|
|
|
Kernel.prototype._handle_input_request = function (e) {
|
|
|
var request = $.parseJSON(e.data);
|
|
|
var header = request.header;
|
|
|
var content = request.content;
|
|
|
var metadata = request.metadata;
|
|
|
var msg_type = header.msg_type;
|
|
|
if (msg_type !== 'input_request') {
|
|
|
console.log("Invalid input request!", request);
|
|
|
return;
|
|
|
}
|
|
|
var callbacks = this.get_callbacks_for_msg(request.parent_header.msg_id);
|
|
|
if (callbacks !== undefined) {
|
|
|
var cb = callbacks[msg_type];
|
|
|
if (cb !== undefined) {
|
|
|
cb(content, metadata);
|
|
|
}
|
|
|
};
|
|
|
};
|
|
|
|
|
|
|
|
|
IPython.Kernel = Kernel;
|
|
|
|
|
|
return IPython;
|
|
|
|
|
|
}(IPython));
|
|
|
|
|
|
|
