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@@ -1,1017 +1,1017 b'' | |||
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1 | 1 | // Copyright (c) IPython Development Team. |
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2 | 2 | // Distributed under the terms of the Modified BSD License. |
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3 | 3 | |
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4 | 4 | define([ |
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5 | 5 | 'base/js/namespace', |
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6 | 6 | 'jquery', |
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7 | 7 | 'base/js/utils', |
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8 | 8 | 'services/kernels/js/comm', |
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9 | 9 | 'widgets/js/init', |
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10 | 10 | ], function(IPython, $, utils, comm, widgetmanager) { |
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11 | 11 | "use strict"; |
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12 | 12 | |
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13 | 13 | /** |
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14 | 14 | * A Kernel class to communicate with the Python kernel. This |
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15 | 15 | * should generally not be constructed directly, but be created |
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16 | 16 | * by. the `Session` object. Once created, this object should be |
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17 | 17 | * used to communicate with the kernel. |
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18 | 18 | * |
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19 | 19 | * @class Kernel |
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20 | 20 | * @param {string} kernel_service_url - the URL to access the kernel REST api |
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21 | 21 | * @param {string} ws_url - the websockets URL |
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22 | 22 | * @param {Notebook} notebook - notebook object |
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23 | 23 | * @param {string} name - the kernel type (e.g. python3) |
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24 | 24 | */ |
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25 | 25 | var Kernel = function (kernel_service_url, ws_url, notebook, name) { |
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26 | 26 | this.events = notebook.events; |
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27 | 27 | |
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28 | 28 | this.id = null; |
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29 | 29 | this.name = name; |
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30 | 30 | |
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31 | 31 | this.channels = { |
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32 | 32 | 'shell': null, |
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33 | 33 | 'iopub': null, |
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34 | 34 | 'stdin': null |
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35 | 35 | }; |
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36 | 36 | |
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37 | 37 | this.kernel_service_url = kernel_service_url; |
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38 | 38 | this.kernel_url = null; |
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39 | 39 | this.ws_url = ws_url || IPython.utils.get_body_data("wsUrl"); |
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40 | 40 | if (!this.ws_url) { |
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41 | 41 | // trailing 's' in https will become wss for secure web sockets |
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42 | 42 | this.ws_url = location.protocol.replace('http', 'ws') + "//" + location.host; |
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43 | 43 | } |
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44 | 44 | |
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45 | 45 | this.username = "username"; |
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46 | 46 | this.session_id = utils.uuid(); |
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47 | 47 | this._msg_callbacks = {}; |
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48 | 48 | |
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49 | 49 | if (typeof(WebSocket) !== 'undefined') { |
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50 | 50 | this.WebSocket = WebSocket; |
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51 | 51 | } else if (typeof(MozWebSocket) !== 'undefined') { |
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52 | 52 | this.WebSocket = MozWebSocket; |
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53 | 53 | } else { |
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54 | 54 | alert('Your browser does not have WebSocket support, please try Chrome, Safari or Firefox β₯ 6. Firefox 4 and 5 are also supported by you have to enable WebSockets in about:config.'); |
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55 | 55 | } |
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56 | 56 | |
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57 | 57 | this.bind_events(); |
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58 | 58 | this.init_iopub_handlers(); |
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59 | 59 | this.comm_manager = new comm.CommManager(this); |
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60 | 60 | this.widget_manager = new widgetmanager.WidgetManager(this.comm_manager, notebook); |
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61 | 61 | |
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62 | 62 | this.last_msg_id = null; |
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63 | 63 | this.last_msg_callbacks = {}; |
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64 | 64 | |
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65 | 65 | this._autorestart_attempt = 0; |
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66 | 66 | this._reconnect_attempt = 0; |
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67 | 67 | }; |
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68 | 68 | |
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69 | 69 | /** |
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70 | 70 | * @function _get_msg |
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71 | 71 | */ |
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72 | 72 | Kernel.prototype._get_msg = function (msg_type, content, metadata) { |
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73 | 73 | var msg = { |
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74 | 74 | header : { |
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75 | 75 | msg_id : utils.uuid(), |
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76 | 76 | username : this.username, |
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77 | 77 | session : this.session_id, |
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78 | 78 | msg_type : msg_type, |
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79 | 79 | version : "5.0" |
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80 | 80 | }, |
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81 | 81 | metadata : metadata || {}, |
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82 | 82 | content : content, |
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83 | 83 | parent_header : {} |
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84 | 84 | }; |
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85 | 85 | return msg; |
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86 | 86 | }; |
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87 | 87 | |
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88 | 88 | /** |
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89 | 89 | * @function bind_events |
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90 | 90 | */ |
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91 | 91 | Kernel.prototype.bind_events = function () { |
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92 | 92 | var that = this; |
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93 | 93 | this.events.on('send_input_reply.Kernel', function(evt, data) { |
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94 | 94 | that.send_input_reply(data); |
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95 | 95 | }); |
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96 | 96 | |
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97 | var record_status = function (evt) { | |
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98 |
console.log('Kernel: ' + evt.type + ' (' + |
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97 | var record_status = function (evt, info) { | |
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98 | console.log('Kernel: ' + evt.type + ' (' + info.kernel.id + ')'); | |
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99 | 99 | }; |
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100 | 100 | |
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101 | 101 | this.events.on('kernel_created.Kernel', record_status); |
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102 | 102 | this.events.on('kernel_reconnecting.Kernel', record_status); |
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103 | 103 | this.events.on('kernel_connected.Kernel', record_status); |
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104 | 104 | this.events.on('kernel_starting.Kernel', record_status); |
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105 | 105 | this.events.on('kernel_restarting.Kernel', record_status); |
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106 | 106 | this.events.on('kernel_autorestarting.Kernel', record_status); |
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107 | 107 | this.events.on('kernel_interrupting.Kernel', record_status); |
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108 | 108 | this.events.on('kernel_disconnected.Kernel', record_status); |
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109 | 109 | // these are commented out because they are triggered a lot, but can |
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110 | 110 | // be uncommented for debugging purposes |
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111 | 111 | //this.events.on('kernel_idle.Kernel', record_status); |
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112 | 112 | //this.events.on('kernel_busy.Kernel', record_status); |
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113 | 113 | this.events.on('kernel_ready.Kernel', record_status); |
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114 | 114 | this.events.on('kernel_killed.Kernel', record_status); |
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115 | 115 | this.events.on('kernel_dead.Kernel', record_status); |
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116 | 116 | |
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117 | 117 | this.events.on('kernel_ready.Kernel', function () { |
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118 | 118 | that._autorestart_attempt = 0; |
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119 | 119 | }); |
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120 | 120 | this.events.on('kernel_connected.Kernel', function () { |
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121 | 121 | that._reconnect_attempt = 0; |
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122 | 122 | }); |
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123 | 123 | }; |
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124 | 124 | |
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125 | 125 | /** |
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126 | 126 | * Initialize the iopub handlers. |
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127 | 127 | * |
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128 | 128 | * @function init_iopub_handlers |
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129 | 129 | */ |
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130 | 130 | Kernel.prototype.init_iopub_handlers = function () { |
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131 | 131 | var output_msg_types = ['stream', 'display_data', 'execute_result', 'error']; |
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132 | 132 | this._iopub_handlers = {}; |
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133 | 133 | this.register_iopub_handler('status', $.proxy(this._handle_status_message, this)); |
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134 | 134 | this.register_iopub_handler('clear_output', $.proxy(this._handle_clear_output, this)); |
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135 | 135 | |
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136 | 136 | for (var i=0; i < output_msg_types.length; i++) { |
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137 | 137 | this.register_iopub_handler(output_msg_types[i], $.proxy(this._handle_output_message, this)); |
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138 | 138 | } |
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139 | 139 | }; |
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140 | 140 | |
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141 | 141 | /** |
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142 | 142 | * GET /api/kernels |
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143 | 143 | * |
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144 | 144 | * Get the list of running kernels. |
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145 | 145 | * |
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146 | 146 | * @function list |
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147 | 147 | * @param {function} [success] - function executed on ajax success |
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148 | 148 | * @param {function} [error] - functon executed on ajax error |
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149 | 149 | */ |
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150 | 150 | Kernel.prototype.list = function (success, error) { |
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151 | 151 | $.ajax(this.kernel_service_url, { |
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152 | 152 | processData: false, |
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153 | 153 | cache: false, |
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154 | 154 | type: "GET", |
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155 | 155 | dataType: "json", |
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156 | 156 | success: success, |
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157 | 157 | error: this._on_error(error) |
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158 | 158 | }); |
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159 | 159 | }; |
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160 | 160 | |
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161 | 161 | /** |
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162 | 162 | * POST /api/kernels |
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163 | 163 | * |
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164 | 164 | * Start a new kernel. |
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165 | 165 | * |
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166 | 166 | * In general this shouldn't be used -- the kernel should be |
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167 | 167 | * started through the session API. If you use this function and |
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168 | 168 | * are also using the session API then your session and kernel |
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169 | 169 | * WILL be out of sync! |
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170 | 170 | * |
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171 | 171 | * @function start |
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172 | 172 | * @param {params} [Object] - parameters to include in the query string |
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173 | 173 | * @param {function} [success] - function executed on ajax success |
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174 | 174 | * @param {function} [error] - functon executed on ajax error |
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175 | 175 | */ |
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176 | 176 | Kernel.prototype.start = function (params, success, error) { |
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177 | 177 | var url = this.kernel_service_url; |
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178 | 178 | var qs = $.param(params || {}); // query string for sage math stuff |
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179 | 179 | if (qs !== "") { |
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180 | 180 | url = url + "?" + qs; |
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181 | 181 | } |
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182 | 182 | |
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183 | 183 | var that = this; |
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184 | 184 | var on_success = function (data, status, xhr) { |
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185 | 185 | that.events.trigger('kernel_created.Kernel', {kernel: that}); |
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186 | 186 | that._kernel_created(data); |
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187 | 187 | if (success) { |
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188 | 188 | success(data, status, xhr); |
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189 | 189 | } |
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190 | 190 | }; |
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191 | 191 | |
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192 | 192 | $.ajax(url, { |
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193 | 193 | processData: false, |
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194 | 194 | cache: false, |
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195 | 195 | type: "POST", |
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196 | 196 | data: JSON.stringify({name: this.name}), |
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197 | 197 | dataType: "json", |
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198 | 198 | success: this._on_success(on_success), |
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199 | 199 | error: this._on_error(error) |
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200 | 200 | }); |
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201 | 201 | |
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202 | 202 | return url; |
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203 | 203 | }; |
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204 | 204 | |
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205 | 205 | /** |
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206 | 206 | * GET /api/kernels/[:kernel_id] |
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207 | 207 | * |
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208 | 208 | * Get information about the kernel. |
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209 | 209 | * |
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210 | 210 | * @function get_info |
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211 | 211 | * @param {function} [success] - function executed on ajax success |
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212 | 212 | * @param {function} [error] - functon executed on ajax error |
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213 | 213 | */ |
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214 | 214 | Kernel.prototype.get_info = function (success, error) { |
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215 | 215 | $.ajax(this.kernel_url, { |
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216 | 216 | processData: false, |
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217 | 217 | cache: false, |
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218 | 218 | type: "GET", |
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219 | 219 | dataType: "json", |
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220 | 220 | success: this._on_success(success), |
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221 | 221 | error: this._on_error(error) |
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222 | 222 | }); |
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223 | 223 | }; |
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224 | 224 | |
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225 | 225 | /** |
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226 | 226 | * DELETE /api/kernels/[:kernel_id] |
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227 | 227 | * |
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228 | 228 | * Shutdown the kernel. |
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229 | 229 | * |
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230 | 230 | * If you are also using sessions, then this function shoul NOT be |
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231 | 231 | * used. Instead, use Session.delete. Otherwise, the session and |
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232 | 232 | * kernel WILL be out of sync. |
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233 | 233 | * |
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234 | 234 | * @function kill |
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235 | 235 | * @param {function} [success] - function executed on ajax success |
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236 | 236 | * @param {function} [error] - functon executed on ajax error |
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237 | 237 | */ |
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238 | 238 | Kernel.prototype.kill = function (success, error) { |
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239 | 239 | this.events.trigger('kernel_killed.Kernel', {kernel: this}); |
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240 | 240 | this._kernel_dead(); |
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241 | 241 | $.ajax(this.kernel_url, { |
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242 | 242 | processData: false, |
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243 | 243 | cache: false, |
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244 | 244 | type: "DELETE", |
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245 | 245 | dataType: "json", |
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246 | 246 | success: this._on_success(success), |
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247 | 247 | error: this._on_error(error) |
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248 | 248 | }); |
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249 | 249 | }; |
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250 | 250 | |
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251 | 251 | /** |
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252 | 252 | * POST /api/kernels/[:kernel_id]/interrupt |
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253 | 253 | * |
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254 | 254 | * Interrupt the kernel. |
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255 | 255 | * |
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256 | 256 | * @function interrupt |
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257 | 257 | * @param {function} [success] - function executed on ajax success |
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258 | 258 | * @param {function} [error] - functon executed on ajax error |
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259 | 259 | */ |
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260 | 260 | Kernel.prototype.interrupt = function (success, error) { |
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261 | 261 | this.events.trigger('kernel_interrupting.Kernel', {kernel: this}); |
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262 | 262 | |
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263 | 263 | var that = this; |
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264 | 264 | var on_success = function (data, status, xhr) { |
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265 | 265 | // get kernel info so we know what state the kernel is in |
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266 | 266 | that.kernel_info(); |
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267 | 267 | if (success) { |
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268 | 268 | success(data, status, xhr); |
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269 | 269 | } |
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270 | 270 | }; |
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271 | 271 | |
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272 | 272 | var url = utils.url_join_encode(this.kernel_url, 'interrupt'); |
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273 | 273 | $.ajax(url, { |
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274 | 274 | processData: false, |
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275 | 275 | cache: false, |
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276 | 276 | type: "POST", |
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277 | 277 | dataType: "json", |
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278 | 278 | success: this._on_success(on_success), |
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279 | 279 | error: this._on_error(error) |
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280 | 280 | }); |
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281 | 281 | }; |
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282 | 282 | |
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283 | 283 | /** |
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284 | 284 | * POST /api/kernels/[:kernel_id]/restart |
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285 | 285 | * |
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286 | 286 | * Restart the kernel. |
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287 | 287 | * |
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288 | 288 | * @function interrupt |
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289 | 289 | * @param {function} [success] - function executed on ajax success |
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290 | 290 | * @param {function} [error] - functon executed on ajax error |
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291 | 291 | */ |
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292 | 292 | Kernel.prototype.restart = function (success, error) { |
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293 | 293 | this.events.trigger('kernel_restarting.Kernel', {kernel: this}); |
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294 | 294 | this.stop_channels(); |
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295 | 295 | |
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296 | 296 | var that = this; |
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297 | 297 | var on_success = function (data, status, xhr) { |
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298 | 298 | that.events.trigger('kernel_created.Kernel', {kernel: that}); |
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299 | 299 | that._kernel_created(data); |
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300 | 300 | if (success) { |
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301 | 301 | success(data, status, xhr); |
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302 | 302 | } |
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303 | 303 | }; |
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304 | 304 | |
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305 | 305 | var on_error = function (xhr, status, err) { |
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306 | 306 | that.events.trigger('kernel_dead.Kernel', {kernel: that}); |
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307 | 307 | that._kernel_dead(); |
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308 | 308 | if (error) { |
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309 | 309 | error(xhr, status, err); |
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310 | 310 | } |
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311 | 311 | }; |
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312 | 312 | |
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313 | 313 | var url = utils.url_join_encode(this.kernel_url, 'restart'); |
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314 | 314 | $.ajax(url, { |
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315 | 315 | processData: false, |
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316 | 316 | cache: false, |
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317 | 317 | type: "POST", |
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318 | 318 | dataType: "json", |
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319 | 319 | success: this._on_success(on_success), |
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320 | 320 | error: this._on_error(on_error) |
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321 | 321 | }); |
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322 | 322 | }; |
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323 | 323 | |
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324 | 324 | /** |
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325 | 325 | * Reconnect to a disconnected kernel. This is not actually a |
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326 | 326 | * standard HTTP request, but useful function nonetheless for |
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327 | 327 | * reconnecting to the kernel if the connection is somehow lost. |
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328 | 328 | * |
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329 | 329 | * @function reconnect |
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330 | 330 | */ |
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331 | 331 | Kernel.prototype.reconnect = function () { |
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332 | 332 | this.events.trigger('kernel_reconnecting.Kernel', {kernel: this}); |
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333 | 333 | setTimeout($.proxy(this.start_channels, this), 3000); |
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334 | 334 | }; |
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335 | 335 | |
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336 | 336 | /** |
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337 | 337 | * Handle a successful AJAX request by updating the kernel id and |
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338 | 338 | * name from the response, and then optionally calling a provided |
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339 | 339 | * callback. |
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340 | 340 | * |
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341 | 341 | * @function _on_success |
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342 | 342 | * @param {function} success - callback |
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343 | 343 | */ |
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344 | 344 | Kernel.prototype._on_success = function (success) { |
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345 | 345 | var that = this; |
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346 | 346 | return function (data, status, xhr) { |
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347 | 347 | if (data) { |
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348 | 348 | that.id = data.id; |
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349 | 349 | that.name = data.name; |
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350 | 350 | } |
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351 | 351 | that.kernel_url = utils.url_join_encode(that.kernel_service_url, that.id); |
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352 | 352 | if (success) { |
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353 | 353 | success(data, status, xhr); |
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354 | 354 | } |
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355 | 355 | }; |
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356 | 356 | }; |
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357 | 357 | |
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358 | 358 | /** |
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359 | 359 | * Handle a failed AJAX request by logging the error message, and |
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360 | 360 | * then optionally calling a provided callback. |
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361 | 361 | * |
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362 | 362 | * @function _on_error |
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363 | 363 | * @param {function} error - callback |
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364 | 364 | */ |
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365 | 365 | Kernel.prototype._on_error = function (error) { |
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366 | 366 | return function (xhr, status, err) { |
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367 | 367 | utils.log_ajax_error(xhr, status, err); |
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368 | 368 | if (error) { |
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369 | 369 | error(xhr, status, err); |
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370 | 370 | } |
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371 | 371 | }; |
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372 | 372 | }; |
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373 | 373 | |
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374 | 374 | /** |
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375 | 375 | * Perform necessary tasks once the kernel has been started, |
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376 | 376 | * including actually connecting to the kernel. |
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377 | 377 | * |
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378 | 378 | * @function _kernel_created |
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379 | 379 | * @param {Object} data - information about the kernel including id |
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380 | 380 | */ |
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381 | 381 | Kernel.prototype._kernel_created = function (data) { |
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382 | 382 | this.id = data.id; |
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383 | 383 | this.kernel_url = utils.url_join_encode(this.kernel_service_url, this.id); |
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384 | 384 | this.start_channels(); |
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385 | 385 | }; |
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386 | 386 | |
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387 | 387 | /** |
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388 | 388 | * Perform necessary tasks once the connection to the kernel has |
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389 | 389 | * been established. This includes requesting information about |
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390 | 390 | * the kernel. |
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391 | 391 | * |
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392 | 392 | * @function _kernel_connected |
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393 | 393 | */ |
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394 | 394 | Kernel.prototype._kernel_connected = function () { |
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395 | 395 | this.events.trigger('kernel_connected.Kernel', {kernel: this}); |
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396 | 396 | this.events.trigger('kernel_starting.Kernel', {kernel: this}); |
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397 | 397 | // get kernel info so we know what state the kernel is in |
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398 | 398 | var that = this; |
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399 | 399 | this.kernel_info(function () { |
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400 |
that.events.trigger('kernel_ready.Kernel', {kernel: th |
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400 | that.events.trigger('kernel_ready.Kernel', {kernel: that}); | |
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401 | 401 | }); |
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402 | 402 | }; |
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403 | 403 | |
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404 | 404 | /** |
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405 | 405 | * Perform necessary tasks after the kernel has died. This closing |
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406 | 406 | * communication channels to the kernel if they are still somehow |
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407 | 407 | * open. |
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408 | 408 | * |
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409 | 409 | * @function _kernel_dead |
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410 | 410 | */ |
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411 | 411 | Kernel.prototype._kernel_dead = function () { |
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412 | 412 | this.stop_channels(); |
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413 | 413 | }; |
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414 | 414 | |
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415 | 415 | /** |
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416 | 416 | * Start the `shell`and `iopub` channels. |
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417 | 417 | * Will stop and restart them if they already exist. |
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418 | 418 | * |
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419 | 419 | * @function start_channels |
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420 | 420 | */ |
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421 | 421 | Kernel.prototype.start_channels = function () { |
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422 | 422 | var that = this; |
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423 | 423 | this.stop_channels(); |
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424 | 424 | var ws_host_url = this.ws_url + this.kernel_url; |
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425 | 425 | |
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426 | 426 | console.log("Starting WebSockets:", ws_host_url); |
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427 | 427 | |
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428 | 428 | this.channels.shell = new this.WebSocket( |
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429 | 429 | this.ws_url + utils.url_join_encode(this.kernel_url, "shell") |
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430 | 430 | ); |
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431 | 431 | this.channels.stdin = new this.WebSocket( |
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432 | 432 | this.ws_url + utils.url_join_encode(this.kernel_url, "stdin") |
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433 | 433 | ); |
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434 | 434 | this.channels.iopub = new this.WebSocket( |
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435 | 435 | this.ws_url + utils.url_join_encode(this.kernel_url, "iopub") |
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436 | 436 | ); |
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437 | 437 | |
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438 | 438 | var already_called_onclose = false; // only alert once |
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439 | 439 | var ws_closed_early = function(evt){ |
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440 | 440 | if (already_called_onclose){ |
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441 | 441 | return; |
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442 | 442 | } |
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443 | 443 | already_called_onclose = true; |
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444 | 444 | if ( ! evt.wasClean ){ |
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445 | 445 | // If the websocket was closed early, that could mean |
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446 | 446 | // that the kernel is actually dead. Try getting |
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447 | 447 | // information about the kernel from the API call -- |
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448 | 448 | // if that fails, then assume the kernel is dead, |
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449 | 449 | // otherwise just follow the typical websocket closed |
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450 | 450 | // protocol. |
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451 | 451 | that.get_info(function () { |
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452 | 452 | that._ws_closed(ws_host_url, false); |
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453 | 453 | }, function () { |
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454 |
that.events.trigger('kernel_dead.Kernel', {kernel: th |
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454 | that.events.trigger('kernel_dead.Kernel', {kernel: that}); | |
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455 | 455 | that._kernel_dead(); |
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456 | 456 | }); |
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457 | 457 | } |
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458 | 458 | }; |
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459 | 459 | var ws_closed_late = function(evt){ |
|
460 | 460 | if (already_called_onclose){ |
|
461 | 461 | return; |
|
462 | 462 | } |
|
463 | 463 | already_called_onclose = true; |
|
464 | 464 | if ( ! evt.wasClean ){ |
|
465 | 465 | that._ws_closed(ws_host_url, false); |
|
466 | 466 | } |
|
467 | 467 | }; |
|
468 | 468 | var ws_error = function(evt){ |
|
469 | 469 | if (already_called_onclose){ |
|
470 | 470 | return; |
|
471 | 471 | } |
|
472 | 472 | already_called_onclose = true; |
|
473 | 473 | that._ws_closed(ws_host_url, true); |
|
474 | 474 | }; |
|
475 | 475 | |
|
476 | 476 | for (var c in this.channels) { |
|
477 | 477 | this.channels[c].onopen = $.proxy(this._ws_opened, this); |
|
478 | 478 | this.channels[c].onclose = ws_closed_early; |
|
479 | 479 | this.channels[c].onerror = ws_error; |
|
480 | 480 | } |
|
481 | 481 | // switch from early-close to late-close message after 1s |
|
482 | 482 | setTimeout(function() { |
|
483 | 483 | for (var c in that.channels) { |
|
484 | 484 | if (that.channels[c] !== null) { |
|
485 | 485 | that.channels[c].onclose = ws_closed_late; |
|
486 | 486 | } |
|
487 | 487 | } |
|
488 | 488 | }, 1000); |
|
489 | 489 | this.channels.shell.onmessage = $.proxy(this._handle_shell_reply, this); |
|
490 | 490 | this.channels.iopub.onmessage = $.proxy(this._handle_iopub_message, this); |
|
491 | 491 | this.channels.stdin.onmessage = $.proxy(this._handle_input_request, this); |
|
492 | 492 | }; |
|
493 | 493 | |
|
494 | 494 | /** |
|
495 | 495 | * Handle a websocket entering the open state sends session and |
|
496 | 496 | * cookie authentication info as first message. |
|
497 | 497 | * |
|
498 | 498 | * @function _ws_opened |
|
499 | 499 | */ |
|
500 | 500 | Kernel.prototype._ws_opened = function (evt) { |
|
501 | 501 | // send the session id so the Session object Python-side |
|
502 | 502 | // has the same identity |
|
503 | 503 | evt.target.send(this.session_id + ':' + document.cookie); |
|
504 | 504 | |
|
505 | 505 | if (this.is_connected()) { |
|
506 | 506 | // all events ready, trigger started event. |
|
507 | 507 | this._kernel_connected(); |
|
508 | 508 | } |
|
509 | 509 | }; |
|
510 | 510 | |
|
511 | 511 | /** |
|
512 | 512 | * Handle a websocket entering the closed state. This closes the |
|
513 | 513 | * other communication channels if they are open. If the websocket |
|
514 | 514 | * was not closed due to an error, try to reconnect to the kernel. |
|
515 | 515 | * |
|
516 | 516 | * @function _ws_closed |
|
517 | 517 | * @param {string} ws_url - the websocket url |
|
518 | 518 | * @param {bool} error - whether the connection was closed due to an error |
|
519 | 519 | */ |
|
520 | 520 | Kernel.prototype._ws_closed = function(ws_url, error) { |
|
521 | 521 | this.stop_channels(); |
|
522 | 522 | |
|
523 | 523 | this.events.trigger('kernel_disconnected.Kernel', {kernel: this}); |
|
524 | 524 | if (error) { |
|
525 | 525 | console.log('WebSocket connection failed: ', ws_url); |
|
526 | 526 | this._reconnect_attempt = this._reconnect_attempt + 1; |
|
527 | 527 | this.events.trigger('kernel_connection_failed.Kernel', {kernel: this, ws_url: ws_url, attempt: this._reconnect_attempt}); |
|
528 | 528 | } |
|
529 | 529 | this.reconnect(); |
|
530 | 530 | }; |
|
531 | 531 | |
|
532 | 532 | /** |
|
533 | 533 | * Close the websocket channels. After successful close, the value |
|
534 | 534 | * in `this.channels[channel_name]` will be null. |
|
535 | 535 | * |
|
536 | 536 | * @function stop_channels |
|
537 | 537 | */ |
|
538 | 538 | Kernel.prototype.stop_channels = function () { |
|
539 | 539 | var that = this; |
|
540 | 540 | var close = function (c) { |
|
541 | 541 | return function () { |
|
542 | if (that.channels[c].readyState === WebSocket.CLOSED) { | |
|
542 | if (that.channels[c] && that.channels[c].readyState === WebSocket.CLOSED) { | |
|
543 | 543 | that.channels[c] = null; |
|
544 | 544 | } |
|
545 | 545 | }; |
|
546 | 546 | }; |
|
547 | 547 | for (var c in this.channels) { |
|
548 | 548 | if ( this.channels[c] !== null ) { |
|
549 | 549 | if (this.channels[c].readyState === WebSocket.OPEN) { |
|
550 | 550 | this.channels[c].onclose = close(c); |
|
551 | 551 | this.channels[c].close(); |
|
552 | 552 | } else { |
|
553 | 553 | close(c)(); |
|
554 | 554 | } |
|
555 | 555 | } |
|
556 | 556 | } |
|
557 | 557 | }; |
|
558 | 558 | |
|
559 | 559 | /** |
|
560 | 560 | * Check whether there is a connection to the kernel. This |
|
561 | 561 | * function only returns true if all channel objects have been |
|
562 | 562 | * created and have a state of WebSocket.OPEN. |
|
563 | 563 | * |
|
564 | 564 | * @function is_connected |
|
565 | 565 | * @returns {bool} - whether there is a connection |
|
566 | 566 | */ |
|
567 | 567 | Kernel.prototype.is_connected = function () { |
|
568 | 568 | for (var c in this.channels) { |
|
569 | 569 | // if any channel is not ready, then we're not connected |
|
570 | 570 | if (this.channels[c] === null) { |
|
571 | 571 | return false; |
|
572 | 572 | } |
|
573 | 573 | if (this.channels[c].readyState !== WebSocket.OPEN) { |
|
574 | 574 | return false; |
|
575 | 575 | } |
|
576 | 576 | } |
|
577 | 577 | return true; |
|
578 | 578 | }; |
|
579 | 579 | |
|
580 | 580 | /** |
|
581 | 581 | * Check whether the connection to the kernel has been completely |
|
582 | 582 | * severed. This function only returns true if all channel objects |
|
583 | 583 | * are null. |
|
584 | 584 | * |
|
585 | 585 | * @function is_fully_disconnected |
|
586 | 586 | * @returns {bool} - whether the kernel is fully disconnected |
|
587 | 587 | */ |
|
588 | 588 | Kernel.prototype.is_fully_disconnected = function () { |
|
589 | 589 | for (var c in this.channels) { |
|
590 | 590 | if (this.channels[c] === null) { |
|
591 | 591 | return true; |
|
592 | 592 | } |
|
593 | 593 | } |
|
594 | 594 | return false; |
|
595 | 595 | }; |
|
596 | 596 | |
|
597 | 597 | /** |
|
598 | 598 | * Send a message on the Kernel's shell channel |
|
599 | 599 | * |
|
600 | 600 | * @function send_shell_message |
|
601 | 601 | */ |
|
602 | 602 | Kernel.prototype.send_shell_message = function (msg_type, content, callbacks, metadata) { |
|
603 | 603 | if (!this.is_connected()) { |
|
604 | 604 | throw new Error("kernel is not connected"); |
|
605 | 605 | } |
|
606 | 606 | var msg = this._get_msg(msg_type, content, metadata); |
|
607 | 607 | this.channels.shell.send(JSON.stringify(msg)); |
|
608 | 608 | this.set_callbacks_for_msg(msg.header.msg_id, callbacks); |
|
609 | 609 | return msg.header.msg_id; |
|
610 | 610 | }; |
|
611 | 611 | |
|
612 | 612 | /** |
|
613 | 613 | * Get kernel info |
|
614 | 614 | * |
|
615 | 615 | * @function kernel_info |
|
616 | 616 | * @param callback {function} |
|
617 | 617 | * |
|
618 | 618 | * When calling this method, pass a callback function that expects one argument. |
|
619 | 619 | * The callback will be passed the complete `kernel_info_reply` message documented |
|
620 | 620 | * [here](http://ipython.org/ipython-doc/dev/development/messaging.html#kernel-info) |
|
621 | 621 | */ |
|
622 | 622 | Kernel.prototype.kernel_info = function (callback) { |
|
623 | 623 | var callbacks; |
|
624 | 624 | if (callback) { |
|
625 | 625 | callbacks = { shell : { reply : callback } }; |
|
626 | 626 | } |
|
627 | 627 | return this.send_shell_message("kernel_info_request", {}, callbacks); |
|
628 | 628 | }; |
|
629 | 629 | |
|
630 | 630 | /** |
|
631 | 631 | * Get info on an object |
|
632 | 632 | * |
|
633 | 633 | * When calling this method, pass a callback function that expects one argument. |
|
634 | 634 | * The callback will be passed the complete `inspect_reply` message documented |
|
635 | 635 | * [here](http://ipython.org/ipython-doc/dev/development/messaging.html#object-information) |
|
636 | 636 | * |
|
637 | 637 | * @function inspect |
|
638 | 638 | * @param code {string} |
|
639 | 639 | * @param cursor_pos {integer} |
|
640 | 640 | * @param callback {function} |
|
641 | 641 | */ |
|
642 | 642 | Kernel.prototype.inspect = function (code, cursor_pos, callback) { |
|
643 | 643 | var callbacks; |
|
644 | 644 | if (callback) { |
|
645 | 645 | callbacks = { shell : { reply : callback } }; |
|
646 | 646 | } |
|
647 | 647 | |
|
648 | 648 | var content = { |
|
649 | 649 | code : code, |
|
650 | 650 | cursor_pos : cursor_pos, |
|
651 | 651 | detail_level : 0 |
|
652 | 652 | }; |
|
653 | 653 | return this.send_shell_message("inspect_request", content, callbacks); |
|
654 | 654 | }; |
|
655 | 655 | |
|
656 | 656 | /** |
|
657 | 657 | * Execute given code into kernel, and pass result to callback. |
|
658 | 658 | * |
|
659 | 659 | * @async |
|
660 | 660 | * @function execute |
|
661 | 661 | * @param {string} code |
|
662 | 662 | * @param [callbacks] {Object} With the following keys (all optional) |
|
663 | 663 | * @param callbacks.shell.reply {function} |
|
664 | 664 | * @param callbacks.shell.payload.[payload_name] {function} |
|
665 | 665 | * @param callbacks.iopub.output {function} |
|
666 | 666 | * @param callbacks.iopub.clear_output {function} |
|
667 | 667 | * @param callbacks.input {function} |
|
668 | 668 | * @param {object} [options] |
|
669 | 669 | * @param [options.silent=false] {Boolean} |
|
670 | 670 | * @param [options.user_expressions=empty_dict] {Dict} |
|
671 | 671 | * @param [options.allow_stdin=false] {Boolean} true|false |
|
672 | 672 | * |
|
673 | 673 | * @example |
|
674 | 674 | * |
|
675 | 675 | * The options object should contain the options for the execute |
|
676 | 676 | * call. Its default values are: |
|
677 | 677 | * |
|
678 | 678 | * options = { |
|
679 | 679 | * silent : true, |
|
680 | 680 | * user_expressions : {}, |
|
681 | 681 | * allow_stdin : false |
|
682 | 682 | * } |
|
683 | 683 | * |
|
684 | 684 | * When calling this method pass a callbacks structure of the |
|
685 | 685 | * form: |
|
686 | 686 | * |
|
687 | 687 | * callbacks = { |
|
688 | 688 | * shell : { |
|
689 | 689 | * reply : execute_reply_callback, |
|
690 | 690 | * payload : { |
|
691 | 691 | * set_next_input : set_next_input_callback, |
|
692 | 692 | * } |
|
693 | 693 | * }, |
|
694 | 694 | * iopub : { |
|
695 | 695 | * output : output_callback, |
|
696 | 696 | * clear_output : clear_output_callback, |
|
697 | 697 | * }, |
|
698 | 698 | * input : raw_input_callback |
|
699 | 699 | * } |
|
700 | 700 | * |
|
701 | 701 | * Each callback will be passed the entire message as a single |
|
702 | 702 | * arugment. Payload handlers will be passed the corresponding |
|
703 | 703 | * payload and the execute_reply message. |
|
704 | 704 | */ |
|
705 | 705 | Kernel.prototype.execute = function (code, callbacks, options) { |
|
706 | 706 | var content = { |
|
707 | 707 | code : code, |
|
708 | 708 | silent : true, |
|
709 | 709 | store_history : false, |
|
710 | 710 | user_expressions : {}, |
|
711 | 711 | allow_stdin : false |
|
712 | 712 | }; |
|
713 | 713 | callbacks = callbacks || {}; |
|
714 | 714 | if (callbacks.input !== undefined) { |
|
715 | 715 | content.allow_stdin = true; |
|
716 | 716 | } |
|
717 | 717 | $.extend(true, content, options); |
|
718 | 718 | this.events.trigger('execution_request.Kernel', {kernel: this, content:content}); |
|
719 | 719 | return this.send_shell_message("execute_request", content, callbacks); |
|
720 | 720 | }; |
|
721 | 721 | |
|
722 | 722 | /** |
|
723 | 723 | * When calling this method, pass a function to be called with the |
|
724 | 724 | * `complete_reply` message as its only argument when it arrives. |
|
725 | 725 | * |
|
726 | 726 | * `complete_reply` is documented |
|
727 | 727 | * [here](http://ipython.org/ipython-doc/dev/development/messaging.html#complete) |
|
728 | 728 | * |
|
729 | 729 | * @function complete |
|
730 | 730 | * @param code {string} |
|
731 | 731 | * @param cursor_pos {integer} |
|
732 | 732 | * @param callback {function} |
|
733 | 733 | */ |
|
734 | 734 | Kernel.prototype.complete = function (code, cursor_pos, callback) { |
|
735 | 735 | var callbacks; |
|
736 | 736 | if (callback) { |
|
737 | 737 | callbacks = { shell : { reply : callback } }; |
|
738 | 738 | } |
|
739 | 739 | var content = { |
|
740 | 740 | code : code, |
|
741 | 741 | cursor_pos : cursor_pos |
|
742 | 742 | }; |
|
743 | 743 | return this.send_shell_message("complete_request", content, callbacks); |
|
744 | 744 | }; |
|
745 | 745 | |
|
746 | 746 | /** |
|
747 | 747 | * @function send_input_reply |
|
748 | 748 | */ |
|
749 | 749 | Kernel.prototype.send_input_reply = function (input) { |
|
750 | 750 | if (!this.is_connected()) { |
|
751 | 751 | throw new Error("kernel is not connected"); |
|
752 | 752 | } |
|
753 | 753 | var content = { |
|
754 | 754 | value : input |
|
755 | 755 | }; |
|
756 | 756 | this.events.trigger('input_reply.Kernel', {kernel: this, content:content}); |
|
757 | 757 | var msg = this._get_msg("input_reply", content); |
|
758 | 758 | this.channels.stdin.send(JSON.stringify(msg)); |
|
759 | 759 | return msg.header.msg_id; |
|
760 | 760 | }; |
|
761 | 761 | |
|
762 | 762 | /** |
|
763 | 763 | * @function register_iopub_handler |
|
764 | 764 | */ |
|
765 | 765 | Kernel.prototype.register_iopub_handler = function (msg_type, callback) { |
|
766 | 766 | this._iopub_handlers[msg_type] = callback; |
|
767 | 767 | }; |
|
768 | 768 | |
|
769 | 769 | /** |
|
770 | 770 | * Get the iopub handler for a specific message type. |
|
771 | 771 | * |
|
772 | 772 | * @function get_iopub_handler |
|
773 | 773 | */ |
|
774 | 774 | Kernel.prototype.get_iopub_handler = function (msg_type) { |
|
775 | 775 | return this._iopub_handlers[msg_type]; |
|
776 | 776 | }; |
|
777 | 777 | |
|
778 | 778 | /** |
|
779 | 779 | * Get callbacks for a specific message. |
|
780 | 780 | * |
|
781 | 781 | * @function get_callbacks_for_msg |
|
782 | 782 | */ |
|
783 | 783 | Kernel.prototype.get_callbacks_for_msg = function (msg_id) { |
|
784 | 784 | if (msg_id == this.last_msg_id) { |
|
785 | 785 | return this.last_msg_callbacks; |
|
786 | 786 | } else { |
|
787 | 787 | return this._msg_callbacks[msg_id]; |
|
788 | 788 | } |
|
789 | 789 | }; |
|
790 | 790 | |
|
791 | 791 | /** |
|
792 | 792 | * Clear callbacks for a specific message. |
|
793 | 793 | * |
|
794 | 794 | * @function clear_callbacks_for_msg |
|
795 | 795 | */ |
|
796 | 796 | Kernel.prototype.clear_callbacks_for_msg = function (msg_id) { |
|
797 | 797 | if (this._msg_callbacks[msg_id] !== undefined ) { |
|
798 | 798 | delete this._msg_callbacks[msg_id]; |
|
799 | 799 | } |
|
800 | 800 | }; |
|
801 | 801 | |
|
802 | 802 | /** |
|
803 | 803 | * @function _finish_shell |
|
804 | 804 | */ |
|
805 | 805 | Kernel.prototype._finish_shell = function (msg_id) { |
|
806 | 806 | var callbacks = this._msg_callbacks[msg_id]; |
|
807 | 807 | if (callbacks !== undefined) { |
|
808 | 808 | callbacks.shell_done = true; |
|
809 | 809 | if (callbacks.iopub_done) { |
|
810 | 810 | this.clear_callbacks_for_msg(msg_id); |
|
811 | 811 | } |
|
812 | 812 | } |
|
813 | 813 | }; |
|
814 | 814 | |
|
815 | 815 | /** |
|
816 | 816 | * @function _finish_iopub |
|
817 | 817 | */ |
|
818 | 818 | Kernel.prototype._finish_iopub = function (msg_id) { |
|
819 | 819 | var callbacks = this._msg_callbacks[msg_id]; |
|
820 | 820 | if (callbacks !== undefined) { |
|
821 | 821 | callbacks.iopub_done = true; |
|
822 | 822 | if (callbacks.shell_done) { |
|
823 | 823 | this.clear_callbacks_for_msg(msg_id); |
|
824 | 824 | } |
|
825 | 825 | } |
|
826 | 826 | }; |
|
827 | 827 | |
|
828 | 828 | /** |
|
829 | 829 | * Set callbacks for a particular message. |
|
830 | 830 | * Callbacks should be a struct of the following form: |
|
831 | 831 | * shell : { |
|
832 | 832 | * |
|
833 | 833 | * } |
|
834 | 834 | * |
|
835 | 835 | * @function set_callbacks_for_msg |
|
836 | 836 | */ |
|
837 | 837 | Kernel.prototype.set_callbacks_for_msg = function (msg_id, callbacks) { |
|
838 | 838 | this.last_msg_id = msg_id; |
|
839 | 839 | if (callbacks) { |
|
840 | 840 | // shallow-copy mapping, because we will modify it at the top level |
|
841 | 841 | var cbcopy = this._msg_callbacks[msg_id] = this.last_msg_callbacks = {}; |
|
842 | 842 | cbcopy.shell = callbacks.shell; |
|
843 | 843 | cbcopy.iopub = callbacks.iopub; |
|
844 | 844 | cbcopy.input = callbacks.input; |
|
845 | 845 | cbcopy.shell_done = (!callbacks.shell); |
|
846 | 846 | cbcopy.iopub_done = (!callbacks.iopub); |
|
847 | 847 | } else { |
|
848 | 848 | this.last_msg_callbacks = {}; |
|
849 | 849 | } |
|
850 | 850 | }; |
|
851 | 851 | |
|
852 | 852 | /** |
|
853 | 853 | * @function _handle_shell_reply |
|
854 | 854 | */ |
|
855 | 855 | Kernel.prototype._handle_shell_reply = function (e) { |
|
856 | 856 | var reply = $.parseJSON(e.data); |
|
857 | 857 | this.events.trigger('shell_reply.Kernel', {kernel: this, reply:reply}); |
|
858 | 858 | var content = reply.content; |
|
859 | 859 | var metadata = reply.metadata; |
|
860 | 860 | var parent_id = reply.parent_header.msg_id; |
|
861 | 861 | var callbacks = this.get_callbacks_for_msg(parent_id); |
|
862 | 862 | if (!callbacks || !callbacks.shell) { |
|
863 | 863 | return; |
|
864 | 864 | } |
|
865 | 865 | var shell_callbacks = callbacks.shell; |
|
866 | 866 | |
|
867 | 867 | // signal that shell callbacks are done |
|
868 | 868 | this._finish_shell(parent_id); |
|
869 | 869 | |
|
870 | 870 | if (shell_callbacks.reply !== undefined) { |
|
871 | 871 | shell_callbacks.reply(reply); |
|
872 | 872 | } |
|
873 | 873 | if (content.payload && shell_callbacks.payload) { |
|
874 | 874 | this._handle_payloads(content.payload, shell_callbacks.payload, reply); |
|
875 | 875 | } |
|
876 | 876 | }; |
|
877 | 877 | |
|
878 | 878 | /** |
|
879 | 879 | * @function _handle_payloads |
|
880 | 880 | */ |
|
881 | 881 | Kernel.prototype._handle_payloads = function (payloads, payload_callbacks, msg) { |
|
882 | 882 | var l = payloads.length; |
|
883 | 883 | // Payloads are handled by triggering events because we don't want the Kernel |
|
884 | 884 | // to depend on the Notebook or Pager classes. |
|
885 | 885 | for (var i=0; i<l; i++) { |
|
886 | 886 | var payload = payloads[i]; |
|
887 | 887 | var callback = payload_callbacks[payload.source]; |
|
888 | 888 | if (callback) { |
|
889 | 889 | callback(payload, msg); |
|
890 | 890 | } |
|
891 | 891 | } |
|
892 | 892 | }; |
|
893 | 893 | |
|
894 | 894 | /** |
|
895 | 895 | * @function _handle_status_message |
|
896 | 896 | */ |
|
897 | 897 | Kernel.prototype._handle_status_message = function (msg) { |
|
898 | 898 | var execution_state = msg.content.execution_state; |
|
899 | 899 | var parent_id = msg.parent_header.msg_id; |
|
900 | 900 | |
|
901 | 901 | // dispatch status msg callbacks, if any |
|
902 | 902 | var callbacks = this.get_callbacks_for_msg(parent_id); |
|
903 | 903 | if (callbacks && callbacks.iopub && callbacks.iopub.status) { |
|
904 | 904 | try { |
|
905 | 905 | callbacks.iopub.status(msg); |
|
906 | 906 | } catch (e) { |
|
907 | 907 | console.log("Exception in status msg handler", e, e.stack); |
|
908 | 908 | } |
|
909 | 909 | } |
|
910 | 910 | |
|
911 | 911 | if (execution_state === 'busy') { |
|
912 | 912 | this.events.trigger('kernel_busy.Kernel', {kernel: this}); |
|
913 | 913 | |
|
914 | 914 | } else if (execution_state === 'idle') { |
|
915 | 915 | // signal that iopub callbacks are (probably) done |
|
916 | 916 | // async output may still arrive, |
|
917 | 917 | // but only for the most recent request |
|
918 | 918 | this._finish_iopub(parent_id); |
|
919 | 919 | |
|
920 | 920 | // trigger status_idle event |
|
921 | 921 | this.events.trigger('kernel_idle.Kernel', {kernel: this}); |
|
922 | 922 | |
|
923 | 923 | } else if (execution_state === 'starting') { |
|
924 | 924 | this.events.trigger('kernel_starting.Kernel', {kernel: this}); |
|
925 | 925 | var that = this; |
|
926 | 926 | this.kernel_info(function () { |
|
927 | 927 | that.events.trigger('kernel_ready.Kernel', {kernel: this}); |
|
928 | 928 | }); |
|
929 | 929 | |
|
930 | 930 | } else if (execution_state === 'restarting') { |
|
931 | 931 | // autorestarting is distinct from restarting, |
|
932 | 932 | // in that it means the kernel died and the server is restarting it. |
|
933 | 933 | // kernel_restarting sets the notification widget, |
|
934 | 934 | // autorestart shows the more prominent dialog. |
|
935 | 935 | this._autorestart_attempt = this._autorestart_attempt + 1; |
|
936 | 936 | this.events.trigger('kernel_restarting.Kernel', {kernel: this}); |
|
937 | 937 | this.events.trigger('kernel_autorestarting.Kernel', {kernel: this, attempt: this._autorestart_attempt}); |
|
938 | 938 | |
|
939 | 939 | } else if (execution_state === 'dead') { |
|
940 | 940 | this.events.trigger('kernel_dead.Kernel', {kernel: this}); |
|
941 | 941 | this._kernel_dead(); |
|
942 | 942 | } |
|
943 | 943 | }; |
|
944 | 944 | |
|
945 | 945 | /** |
|
946 | 946 | * Handle clear_output message |
|
947 | 947 | * |
|
948 | 948 | * @function _handle_clear_output |
|
949 | 949 | */ |
|
950 | 950 | Kernel.prototype._handle_clear_output = function (msg) { |
|
951 | 951 | var callbacks = this.get_callbacks_for_msg(msg.parent_header.msg_id); |
|
952 | 952 | if (!callbacks || !callbacks.iopub) { |
|
953 | 953 | return; |
|
954 | 954 | } |
|
955 | 955 | var callback = callbacks.iopub.clear_output; |
|
956 | 956 | if (callback) { |
|
957 | 957 | callback(msg); |
|
958 | 958 | } |
|
959 | 959 | }; |
|
960 | 960 | |
|
961 | 961 | /** |
|
962 | 962 | * handle an output message (execute_result, display_data, etc.) |
|
963 | 963 | * |
|
964 | 964 | * @function _handle_output_message |
|
965 | 965 | */ |
|
966 | 966 | Kernel.prototype._handle_output_message = function (msg) { |
|
967 | 967 | var callbacks = this.get_callbacks_for_msg(msg.parent_header.msg_id); |
|
968 | 968 | if (!callbacks || !callbacks.iopub) { |
|
969 | 969 | return; |
|
970 | 970 | } |
|
971 | 971 | var callback = callbacks.iopub.output; |
|
972 | 972 | if (callback) { |
|
973 | 973 | callback(msg); |
|
974 | 974 | } |
|
975 | 975 | }; |
|
976 | 976 | |
|
977 | 977 | /** |
|
978 | 978 | * Dispatch IOPub messages to respective handlers. Each message |
|
979 | 979 | * type should have a handler. |
|
980 | 980 | * |
|
981 | 981 | * @function _handle_iopub_message |
|
982 | 982 | */ |
|
983 | 983 | Kernel.prototype._handle_iopub_message = function (e) { |
|
984 | 984 | var msg = $.parseJSON(e.data); |
|
985 | 985 | |
|
986 | 986 | var handler = this.get_iopub_handler(msg.header.msg_type); |
|
987 | 987 | if (handler !== undefined) { |
|
988 | 988 | handler(msg); |
|
989 | 989 | } |
|
990 | 990 | }; |
|
991 | 991 | |
|
992 | 992 | /** |
|
993 | 993 | * @function _handle_input_request |
|
994 | 994 | */ |
|
995 | 995 | Kernel.prototype._handle_input_request = function (e) { |
|
996 | 996 | var request = $.parseJSON(e.data); |
|
997 | 997 | var header = request.header; |
|
998 | 998 | var content = request.content; |
|
999 | 999 | var metadata = request.metadata; |
|
1000 | 1000 | var msg_type = header.msg_type; |
|
1001 | 1001 | if (msg_type !== 'input_request') { |
|
1002 | 1002 | console.log("Invalid input request!", request); |
|
1003 | 1003 | return; |
|
1004 | 1004 | } |
|
1005 | 1005 | var callbacks = this.get_callbacks_for_msg(request.parent_header.msg_id); |
|
1006 | 1006 | if (callbacks) { |
|
1007 | 1007 | if (callbacks.input) { |
|
1008 | 1008 | callbacks.input(request); |
|
1009 | 1009 | } |
|
1010 | 1010 | } |
|
1011 | 1011 | }; |
|
1012 | 1012 | |
|
1013 | 1013 | // Backwards compatability. |
|
1014 | 1014 | IPython.Kernel = Kernel; |
|
1015 | 1015 | |
|
1016 | 1016 | return {'Kernel': Kernel}; |
|
1017 | 1017 | }); |
@@ -1,328 +1,328 b'' | |||
|
1 | 1 | // Copyright (c) IPython Development Team. |
|
2 | 2 | // Distributed under the terms of the Modified BSD License. |
|
3 | 3 | |
|
4 | 4 | define([ |
|
5 | 5 | 'base/js/namespace', |
|
6 | 6 | 'jquery', |
|
7 | 7 | 'base/js/utils', |
|
8 | 8 | 'services/kernels/js/kernel', |
|
9 | 9 | ], function(IPython, $, utils, kernel) { |
|
10 | 10 | "use strict"; |
|
11 | 11 | |
|
12 | 12 | /** |
|
13 | 13 | * Session object for accessing the session REST api. The session |
|
14 | 14 | * should be used to start kernels and then shut them down -- for |
|
15 | 15 | * all other operations, the kernel object should be used. |
|
16 | 16 | * |
|
17 | 17 | * Options should include: |
|
18 | 18 | * - notebook_name: the notebook name |
|
19 | 19 | * - notebook_path: the path (not including name) to the notebook |
|
20 | 20 | * - kernel_name: the type of kernel (e.g. python3) |
|
21 | 21 | * - base_url: the root url of the notebook server |
|
22 | 22 | * - ws_url: the url to access websockets |
|
23 | 23 | * - notebook: Notebook object |
|
24 | 24 | * |
|
25 | 25 | * @class Session |
|
26 | 26 | * @param {Object} options |
|
27 | 27 | */ |
|
28 | 28 | var Session = function (options) { |
|
29 | 29 | this.id = null; |
|
30 | 30 | this.notebook_model = { |
|
31 | 31 | name: options.notebook_name, |
|
32 | 32 | path: options.notebook_path |
|
33 | 33 | }; |
|
34 | 34 | this.kernel_model = { |
|
35 | 35 | id: null, |
|
36 | 36 | name: options.kernel_name |
|
37 | 37 | }; |
|
38 | 38 | |
|
39 | 39 | this.base_url = options.base_url; |
|
40 | 40 | this.ws_url = options.ws_url; |
|
41 | 41 | this.session_service_url = utils.url_join_encode(this.base_url, 'api/sessions'); |
|
42 | 42 | this.session_url = null; |
|
43 | 43 | |
|
44 | 44 | this.notebook = options.notebook; |
|
45 | 45 | this.kernel = null; |
|
46 | 46 | this.events = options.notebook.events; |
|
47 | 47 | |
|
48 | 48 | this.bind_events(); |
|
49 | 49 | }; |
|
50 | 50 | |
|
51 | 51 | Session.prototype.bind_events = function () { |
|
52 | 52 | var that = this; |
|
53 | var record_status = function (evt) { | |
|
54 |
console.log('Session: ' + evt.type + ' (' + |
|
|
53 | var record_status = function (evt, info) { | |
|
54 | console.log('Session: ' + evt.type + ' (' + info.session.id + ')'); | |
|
55 | 55 | }; |
|
56 | 56 | |
|
57 | 57 | this.events.on('kernel_created.Session', record_status); |
|
58 | 58 | this.events.on('kernel_dead.Session', record_status); |
|
59 | 59 | this.events.on('kernel_killed.Session', record_status); |
|
60 | 60 | |
|
61 | 61 | // if the kernel dies, then also remove the session |
|
62 | 62 | this.events.on('kernel_dead.Kernel', function () { |
|
63 | 63 | that.delete(); |
|
64 | 64 | }); |
|
65 | 65 | }; |
|
66 | 66 | |
|
67 | 67 | |
|
68 | 68 | // Public REST api functions |
|
69 | 69 | |
|
70 | 70 | /** |
|
71 | 71 | * GET /api/sessions |
|
72 | 72 | * |
|
73 | 73 | * Get a list of the current sessions. |
|
74 | 74 | * |
|
75 | 75 | * @function list |
|
76 | 76 | * @param {function} [success] - function executed on ajax success |
|
77 | 77 | * @param {function} [error] - functon executed on ajax error |
|
78 | 78 | */ |
|
79 | 79 | Session.prototype.list = function (success, error) { |
|
80 | 80 | $.ajax(this.session_service_url, { |
|
81 | 81 | processData: false, |
|
82 | 82 | cache: false, |
|
83 | 83 | type: "GET", |
|
84 | 84 | dataType: "json", |
|
85 | 85 | success: success, |
|
86 | 86 | error: this._on_error(error) |
|
87 | 87 | }); |
|
88 | 88 | }; |
|
89 | 89 | |
|
90 | 90 | /** |
|
91 | 91 | * POST /api/sessions |
|
92 | 92 | * |
|
93 | 93 | * Start a new session. This function can only executed once. |
|
94 | 94 | * |
|
95 | 95 | * @function start |
|
96 | 96 | * @param {function} [success] - function executed on ajax success |
|
97 | 97 | * @param {function} [error] - functon executed on ajax error |
|
98 | 98 | */ |
|
99 | 99 | Session.prototype.start = function (success, error) { |
|
100 | 100 | var that = this; |
|
101 | 101 | var on_success = function (data, status, xhr) { |
|
102 | 102 | if (!that.kernel) { |
|
103 | 103 | var kernel_service_url = utils.url_path_join(that.base_url, "api/kernels"); |
|
104 | 104 | that.kernel = new kernel.Kernel(kernel_service_url, that.ws_url, that.notebook, that.kernel_model.name); |
|
105 | 105 | } |
|
106 | 106 | that.events.trigger('kernel_created.Session', {session: that, kernel: that.kernel}); |
|
107 | 107 | that.kernel._kernel_created(data.kernel); |
|
108 | 108 | if (success) { |
|
109 | 109 | success(data, status, xhr); |
|
110 | 110 | } |
|
111 | 111 | }; |
|
112 | 112 | var on_error = function (xhr, status, err) { |
|
113 | 113 | that.events.trigger('kernel_dead.Session', {session: that, xhr: xhr, status: status, error: err}); |
|
114 | 114 | if (error) { |
|
115 | 115 | error(xhr, status, err); |
|
116 | 116 | } |
|
117 | 117 | }; |
|
118 | 118 | |
|
119 | 119 | $.ajax(this.session_service_url, { |
|
120 | 120 | processData: false, |
|
121 | 121 | cache: false, |
|
122 | 122 | type: "POST", |
|
123 | 123 | data: JSON.stringify(this._get_model()), |
|
124 | 124 | dataType: "json", |
|
125 | 125 | success: this._on_success(on_success), |
|
126 | 126 | error: this._on_error(on_error) |
|
127 | 127 | }); |
|
128 | 128 | }; |
|
129 | 129 | |
|
130 | 130 | /** |
|
131 | 131 | * GET /api/sessions/[:session_id] |
|
132 | 132 | * |
|
133 | 133 | * Get information about a session. |
|
134 | 134 | * |
|
135 | 135 | * @function get_info |
|
136 | 136 | * @param {function} [success] - function executed on ajax success |
|
137 | 137 | * @param {function} [error] - functon executed on ajax error |
|
138 | 138 | */ |
|
139 | 139 | Session.prototype.get_info = function (success, error) { |
|
140 | 140 | $.ajax(this.session_url, { |
|
141 | 141 | processData: false, |
|
142 | 142 | cache: false, |
|
143 | 143 | type: "GET", |
|
144 | 144 | dataType: "json", |
|
145 | 145 | success: this._on_success(success), |
|
146 | 146 | error: this._on_error(error) |
|
147 | 147 | }); |
|
148 | 148 | }; |
|
149 | 149 | |
|
150 | 150 | /** |
|
151 | 151 | * PATCH /api/sessions/[:session_id] |
|
152 | 152 | * |
|
153 | 153 | * Rename or move a notebook. If the given name or path are |
|
154 | 154 | * undefined, then they will not be changed. |
|
155 | 155 | * |
|
156 | 156 | * @function rename_notebook |
|
157 | 157 | * @param {string} [name] - new notebook name |
|
158 | 158 | * @param {string} [path] - new path to notebook |
|
159 | 159 | * @param {function} [success] - function executed on ajax success |
|
160 | 160 | * @param {function} [error] - functon executed on ajax error |
|
161 | 161 | */ |
|
162 | 162 | Session.prototype.rename_notebook = function (name, path, success, error) { |
|
163 | 163 | if (name !== undefined) { |
|
164 | 164 | this.notebook_model.name = name; |
|
165 | 165 | } |
|
166 | 166 | if (path !== undefined) { |
|
167 | 167 | this.notebook_model.path = path; |
|
168 | 168 | } |
|
169 | 169 | |
|
170 | 170 | $.ajax(this.session_url, { |
|
171 | 171 | processData: false, |
|
172 | 172 | cache: false, |
|
173 | 173 | type: "PATCH", |
|
174 | 174 | data: JSON.stringify(this._get_model()), |
|
175 | 175 | dataType: "json", |
|
176 | 176 | success: this._on_success(success), |
|
177 | 177 | error: this._on_error(error) |
|
178 | 178 | }); |
|
179 | 179 | }; |
|
180 | 180 | |
|
181 | 181 | /** |
|
182 | 182 | * DELETE /api/sessions/[:session_id] |
|
183 | 183 | * |
|
184 | 184 | * Kill the kernel and shutdown the session. |
|
185 | 185 | * |
|
186 | 186 | * @function delete |
|
187 | 187 | * @param {function} [success] - function executed on ajax success |
|
188 | 188 | * @param {function} [error] - functon executed on ajax error |
|
189 | 189 | */ |
|
190 | 190 | Session.prototype.delete = function (success, error) { |
|
191 | 191 | if (this.kernel) { |
|
192 | 192 | this.events.trigger('kernel_killed.Session', {session: this, kernel: this.kernel}); |
|
193 | 193 | this.kernel._kernel_dead(); |
|
194 | 194 | } |
|
195 | 195 | |
|
196 | 196 | $.ajax(this.session_url, { |
|
197 | 197 | processData: false, |
|
198 | 198 | cache: false, |
|
199 | 199 | type: "DELETE", |
|
200 | 200 | dataType: "json", |
|
201 | 201 | success: this._on_success(success), |
|
202 | 202 | error: this._on_error(error) |
|
203 | 203 | }); |
|
204 | 204 | }; |
|
205 | 205 | |
|
206 | 206 | /** |
|
207 | 207 | * Restart the session by deleting it and the starting it |
|
208 | 208 | * fresh. If options are given, they can include any of the |
|
209 | 209 | * following: |
|
210 | 210 | * |
|
211 | 211 | * - notebook_name - the name of the notebook |
|
212 | 212 | * - notebook_path - the path to the notebook |
|
213 | 213 | * - kernel_name - the name (type) of the kernel |
|
214 | 214 | * |
|
215 | 215 | * @function restart |
|
216 | 216 | * @param {Object} [options] - options for the new kernel |
|
217 | 217 | * @param {function} [success] - function executed on ajax success |
|
218 | 218 | * @param {function} [error] - functon executed on ajax error |
|
219 | 219 | */ |
|
220 | 220 | Session.prototype.restart = function (options, success, error) { |
|
221 | 221 | var that = this; |
|
222 | 222 | var start = function () { |
|
223 | 223 | if (options && options.notebook_name) { |
|
224 | 224 | that.notebook_model.name = options.notebook_name; |
|
225 | 225 | } |
|
226 | 226 | if (options && options.notebook_path) { |
|
227 | 227 | that.notebook_model.path = options.notebook_path; |
|
228 | 228 | } |
|
229 | 229 | if (options && options.kernel_name) { |
|
230 | 230 | that.kernel_model.name = options.kernel_name; |
|
231 | 231 | } |
|
232 | 232 | that.kernel_model.id = null; |
|
233 | 233 | that.start(success, error); |
|
234 | 234 | }; |
|
235 | 235 | this.delete(start, start); |
|
236 | 236 | }; |
|
237 | 237 | |
|
238 | 238 | // Helper functions |
|
239 | 239 | |
|
240 | 240 | /** |
|
241 | 241 | * Get the data model for the session, which includes the notebook |
|
242 | 242 | * (name and path) and kernel (name and id). |
|
243 | 243 | * |
|
244 | 244 | * @function _get_model |
|
245 | 245 | * @returns {Object} - the data model |
|
246 | 246 | */ |
|
247 | 247 | Session.prototype._get_model = function () { |
|
248 | 248 | return { |
|
249 | 249 | notebook: this.notebook_model, |
|
250 | 250 | kernel: this.kernel_model |
|
251 | 251 | }; |
|
252 | 252 | }; |
|
253 | 253 | |
|
254 | 254 | /** |
|
255 | 255 | * Update the data model from the given JSON object, which should |
|
256 | 256 | * have attributes of `id`, `notebook`, and/or `kernel`. If |
|
257 | 257 | * provided, the notebook data must include name and path, and the |
|
258 | 258 | * kernel data must include name and id. |
|
259 | 259 | * |
|
260 | 260 | * @function _update_model |
|
261 | 261 | * @param {Object} data - updated data model |
|
262 | 262 | */ |
|
263 | 263 | Session.prototype._update_model = function (data) { |
|
264 | 264 | if (data && data.id) { |
|
265 | 265 | this.id = data.id; |
|
266 | 266 | this.session_url = utils.url_join_encode(this.session_service_url, this.id); |
|
267 | 267 | } |
|
268 | 268 | if (data && data.notebook) { |
|
269 | 269 | this.notebook_model.name = data.notebook.name; |
|
270 | 270 | this.notebook_model.path = data.notebook.path; |
|
271 | 271 | } |
|
272 | 272 | if (data && data.kernel) { |
|
273 | 273 | this.kernel_model.name = data.kernel.name; |
|
274 | 274 | this.kernel_model.id = data.kernel.id; |
|
275 | 275 | } |
|
276 | 276 | }; |
|
277 | 277 | |
|
278 | 278 | /** |
|
279 | 279 | * Handle a successful AJAX request by updating the session data |
|
280 | 280 | * model with the response, and then optionally calling a provided |
|
281 | 281 | * callback. |
|
282 | 282 | * |
|
283 | 283 | * @function _on_success |
|
284 | 284 | * @param {function} success - callback |
|
285 | 285 | */ |
|
286 | 286 | Session.prototype._on_success = function (success) { |
|
287 | 287 | var that = this; |
|
288 | 288 | return function (data, status, xhr) { |
|
289 | 289 | that._update_model(data); |
|
290 | 290 | if (success) { |
|
291 | 291 | success(data, status, xhr); |
|
292 | 292 | } |
|
293 | 293 | }; |
|
294 | 294 | }; |
|
295 | 295 | |
|
296 | 296 | /** |
|
297 | 297 | * Handle a failed AJAX request by logging the error message, and |
|
298 | 298 | * then optionally calling a provided callback. |
|
299 | 299 | * |
|
300 | 300 | * @function _on_error |
|
301 | 301 | * @param {function} error - callback |
|
302 | 302 | */ |
|
303 | 303 | Session.prototype._on_error = function (error) { |
|
304 | 304 | return function (xhr, status, err) { |
|
305 | 305 | utils.log_ajax_error(xhr, status, err); |
|
306 | 306 | if (error) { |
|
307 | 307 | error(xhr, status, err); |
|
308 | 308 | } |
|
309 | 309 | }; |
|
310 | 310 | }; |
|
311 | 311 | |
|
312 | 312 | /** |
|
313 | 313 | * Error type indicating that the session is already starting. |
|
314 | 314 | */ |
|
315 | 315 | var SessionAlreadyStarting = function (message) { |
|
316 | 316 | this.name = "SessionAlreadyStarting"; |
|
317 | 317 | this.message = (message || ""); |
|
318 | 318 | }; |
|
319 | 319 | SessionAlreadyStarting.prototype = Error.prototype; |
|
320 | 320 | |
|
321 | 321 | // For backwards compatability. |
|
322 | 322 | IPython.Session = Session; |
|
323 | 323 | |
|
324 | 324 | return { |
|
325 | 325 | Session: Session, |
|
326 | 326 | SessionAlreadyStarting: SessionAlreadyStarting |
|
327 | 327 | }; |
|
328 | 328 | }); |
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