gazetk / DesktopConnector / DesktopConnector.js @ 908a231e
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| 1 | 908a231e | Thies Pfeiffer | var net = require('net'); |
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| 2 | var ws = require("nodejs-websocket"); |
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| 3 | |||
| 4 | var HOST = '127.0.0.1'; |
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| 5 | var PORT = 6555; |
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| 6 | var connected = false; |
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| 7 | var client = new net.Socket(); |
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| 8 | |||
| 9 | var connectionManager = [];
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| 10 | var connectionId = 0; |
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| 11 | var websocket_server = null; |
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| 12 | |||
| 13 | var eyeTracker = ""; |
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| 14 | if (process.argv.length == 2) { |
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| 15 | |||
| 16 | console.log("Start the server with --tracker=smi or --tracker=mygaze or --tracker=eyetribe");
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| 17 | process.exit(); |
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| 18 | |||
| 19 | } else if (process.argv.length > 2) { |
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| 20 | process.argv.forEach(function(val, index, array) {
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| 21 | |||
| 22 | if (val.indexOf("tracker") > -1) { |
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| 23 | eyeTracker = val.split("=")[1]; |
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| 24 | } |
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| 25 | |||
| 26 | }); |
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| 27 | } |
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| 28 | |||
| 29 | if (eyeTracker == "" || eyeTracker == undefined) { |
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| 30 | console.log("tracker was not set - exiting.");
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| 31 | process.exit(); |
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| 32 | } |
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| 33 | |||
| 34 | console.log("Tracker is " + eyeTracker);
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| 35 | |||
| 36 | function createServer() { |
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| 37 | websocket_server = ws.createServer(function(conn) {
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| 38 | conn.on("text", function(str) { |
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| 39 | |||
| 40 | |||
| 41 | var senderID;
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| 42 | for (var c in connectionManager) { |
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| 43 | //console.log(c+"{__}"+position);
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| 44 | if (conn == connectionManager[c].conn) {
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| 45 | senderID = connectionManager[c].id; |
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| 46 | } |
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| 47 | } |
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| 48 | |||
| 49 | console.log("Message from connection with id:" + senderID + " : \"" + str + "\""); |
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| 50 | if (str.indexOf("TYPE") > -1) { |
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| 51 | console.log("typestring: " + str);
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| 52 | var clientType = str.split(':'); |
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| 53 | //connectionManager[connectionId] = new Array();
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| 54 | console.log("type = " + clientType[1]); |
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| 55 | |||
| 56 | for (var c in connectionManager) { |
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| 57 | //console.log("Sending SMI Data: "+str);
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| 58 | if (connectionManager[c]['conn'] == conn) { |
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| 59 | connectionManager[c]['type'] = clientType[1]; |
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| 60 | } |
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| 61 | } |
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| 62 | |||
| 63 | |||
| 64 | } |
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| 65 | |||
| 66 | if (eyeTracker == "smi") { |
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| 67 | try {
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| 68 | for (var c in connectionManager) { |
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| 69 | console.log("Sending SMI Data: " + str);
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| 70 | if (connectionManager[c]['type'] == "browser") { |
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| 71 | connectionManager[c]['conn'].sendText(str);
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| 72 | } |
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| 73 | } |
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| 74 | } catch (err) {
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| 75 | console.log("error in websocketserver: ");
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| 76 | console.log("error at line:" + err.lineNumber);
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| 77 | console.log("error:" + err);
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| 78 | console.log("error at message:" + data);
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| 79 | console.log("trying to establish new connection");
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| 80 | createServer(); |
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| 81 | } |
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| 82 | |||
| 83 | |||
| 84 | } |
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| 85 | if (eyeTracker == "mygaze") { |
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| 86 | try {
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| 87 | for (var c in connectionManager) { |
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| 88 | console.log("Sending myGaze Data: " + str);
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| 89 | if (connectionManager[c]['type'] == "browser") { |
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| 90 | connectionManager[c]['conn'].sendText(str);
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| 91 | } |
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| 92 | } |
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| 93 | } catch (err) {
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| 94 | console.log("error in websocketserver: ");
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| 95 | console.log("error at line:" + err.lineNumber);
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| 96 | console.log("error:" + err);
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| 97 | console.log("error at message:" + data);
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| 98 | console.log("trying to establish new connection");
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| 99 | createServer(); |
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| 100 | } |
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| 101 | |||
| 102 | |||
| 103 | } |
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| 104 | if (eyeTracker == "eyetribe") { |
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| 105 | //send the message from the browser directly to the eyetracker
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| 106 | client.write(str); |
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| 107 | } |
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| 108 | }); |
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| 109 | |||
| 110 | conn.on('error', function(er) { |
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| 111 | // The error won't crash the process, but what it does is worse!
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| 112 | // Though we've prevented abrupt process restarting, we are leaking
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| 113 | // resources like crazy if this ever happens.
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| 114 | // This is no better than process.on('uncaughtException')!
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| 115 | console.log(eyeTracker +" disconnected. ERRORMESSAGE: ", er.message);
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| 116 | }); |
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| 117 | |||
| 118 | |||
| 119 | conn.on("close", function(code, reason) { |
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| 120 | for (var c in connectionManager) { |
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| 121 | //console.log(c+"{__}"+position);
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| 122 | if (conn == connectionManager[c].conn) {
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| 123 | console.log("connection '" + c + "' disconnected."); |
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| 124 | delete connectionManager[c];
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| 125 | } |
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| 126 | } |
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| 127 | }); |
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| 128 | }).listen(6777);
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| 129 | |||
| 130 | |||
| 131 | |||
| 132 | websocket_server.on("connection", function(conn) { |
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| 133 | connectionManager[connectionId] = []; |
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| 134 | connectionManager[connectionId].conn = conn; |
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| 135 | connectionManager[connectionId].id = connectionId; |
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| 136 | console.log("A new client connected with id: " + connectionId);
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| 137 | connectionId++; |
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| 138 | }); |
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| 139 | |||
| 140 | } |
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| 141 | |||
| 142 | |||
| 143 | |||
| 144 | if (eyeTracker == "eyetribe") { |
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| 145 | //Heartbeat timer
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| 146 | setInterval(function() {
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| 147 | if (connected) {
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| 148 | sendHeartbeat(client); |
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| 149 | } |
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| 150 | }, 250);
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| 151 | client.connect(PORT, HOST, function() {
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| 152 | |||
| 153 | console.log('Websocket connected successfully to tcp server(EyeTracker): ' + HOST + ':' + PORT); |
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| 154 | connected = true;
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| 155 | |||
| 156 | //check the eyetracker status
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| 157 | //client.write('{"category": "tracker","request": "get","values": ["push", "iscalibrated" ]}');
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| 158 | //client.write('{"category": "tracker","request": "set","values": {"push": true,"version": 1}}');
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| 159 | |||
| 160 | //client.write('{"category": "tracker","request" : "get","values": [ "push", "iscalibrated" ]}');
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| 161 | }); |
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| 162 | } else if (eyeTracker == "smi") { |
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| 163 | console.log('Waiting for messages from SMI EyeTracker on 127.0.0.1:6777');
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| 164 | |||
| 165 | } else if (eyeTracker == "mygaze") { |
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| 166 | console.log('Waiting for messages from myGaze EyeTracker on 127.0.0.1:6777');
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| 167 | |||
| 168 | } |
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| 169 | |||
| 170 | |||
| 171 | //as soon as the websocket receives any data from the eyetracker it is forwarded to the browser
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| 172 | client.on('data', function(data) { |
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| 173 | |||
| 174 | try {
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| 175 | for (var c in connectionManager) { |
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| 176 | console.log("Sending EyeTrackingData to Browser: "+data);
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| 177 | |||
| 178 | connectionManager[c]['conn'].sendText(data);
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| 179 | |||
| 180 | } |
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| 181 | } catch (err) {
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| 182 | console.log("error in websocketserver: ");
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| 183 | console.log("error at line:" + err.lineNumber);
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| 184 | console.log("error:" + err);
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| 185 | console.log("error at message:" + data);
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| 186 | console.log("trying to establish new connection");
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| 187 | createServer(); |
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| 188 | } |
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| 189 | // Close the client socket completely
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| 190 | //client.destroy();
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| 191 | }); |
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| 192 | |||
| 193 | // Add a 'close' event handler for the client socket
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| 194 | client.on('close', function() { |
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| 195 | connected = false;
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| 196 | console.log('EyeTracker Disconnected.');
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| 197 | createServer(); |
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| 198 | |||
| 199 | }); |
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| 200 | |||
| 201 | function sendHeartbeat(socket) { |
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| 202 | socket.write("{\"category\":\"heartbeat\",\"request\":null}");
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| 203 | //console.log('Heartbeat sent.');
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| 204 | } |
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| 205 | |||
| 206 | |||
| 207 | |||
| 208 | try {
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| 209 | createServer(); |
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| 210 | } catch (err) {
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| 211 | console.log("error in websocketserver: ");
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| 212 | console.log("error at line:" + err.lineNumber);
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| 213 | console.log("error:" + err);
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| 214 | console.log("error at message:" + data);
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| 215 | console.log("trying to establish new connection");
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| 216 | createServer(); |
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| 217 | } |