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annotate webtty.js @ 98:75a016c49076 beta4

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Designate as beta4.
author John "Elwin" Edwards <elwin@sdf.org>
date Thu, 12 Jul 2012 07:57:50 -0700
parents ad4229cf8321
children f14e92f6d955
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1 #!/usr/bin/env node
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2 var http = require('http');
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3 var url = require('url');
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4 var path = require('path');
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5 var fs = require('fs');
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6 var pty = require("/usr/local/lib/node_modules/pty.js");
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7
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8 var serveStaticRoot = "/home/elwin/hk/nodejs/rlg/s/";
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9 var ptyhelp = "/home/elwin/hk/nodejs/rlg/ptyhelper";
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10 var sessions = {};
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11
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12 var env_dontuse = {"TMUX": true, "TMUX_PANE": true};
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13
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14 /* Constructor for TermSessions. Note that it opens the terminal and
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15 * adds itself to the sessions dict.
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16 */
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17 function TermSession(sessid, h, w) {
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18 /* Set up the sizes. */
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19 w = Math.floor(Number(w));
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20 if (!(w > 0 && w < 256))
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21 w = 80;
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22 this.w = w;
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23 h = Math.floor(Number(h));
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24 if (!(h > 0 && h < 256))
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25 h = 25;
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26 this.h = h;
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27 /* Customize the environment. */
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28 var childenv = {};
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29 for (var key in process.env) {
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30 if (!(key in env_dontuse))
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31 childenv[key] = process.env[key];
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32 }
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33 var spawnopts = {"env": childenv, "cwd": process.env["HOME"],
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34 "rows": this.h, "cols": this.w};
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35 this.term = pty.spawn("bash", [], spawnopts);
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36 var ss = this;
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37 /* Eventually we'll need to make sure the sessid isn't in use yet. */
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38 this.sessid = sessid;
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39 this.alive = true;
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40 this.data = []; // Buffer for the process' output.
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41 this.nsend = 0; // Number to use for the next message sent.
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42 this.nrecv = 0; // Number expected on the next message received.
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43 this.msgQ = []; // Queue for messages that arrived out of order.
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44 this.term.on("data", function (buf) {
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45 ss.data.push(buf);
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46 });
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47 this.term.on("exit", function () {
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48 ss.alive = false;
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49 /* Wait for all the data to get collected */
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50 setTimeout(ss.cleanup, 1000);
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51 });
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52 this.write = function (data, n) {
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53 if (!this.alive) {
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54 /* Throw some kind of exception? */
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55 return;
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56 }
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57 if (n !== this.nrecv) {
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58 console.log("Session " + this.sessid + ": Expected message " + this.nrecv + ", got " + n);
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59 }
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60 this.nrecv = n + 1;
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61 this.term.write(data);
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62 };
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63 this.read = function () {
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64 if (this.data.length == 0)
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65 return null;
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66 var pos = 0;
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67 var i = 0;
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68 for (i = 0; i < this.data.length; i++)
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69 pos += Buffer.byteLength(this.data[i]);
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70 var nbuf = new Buffer(pos);
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71 var tptr;
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72 pos = 0;
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73 while (this.data.length > 0) {
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74 tptr = new Buffer(this.data.shift());
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75 tptr.copy(nbuf, pos);
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76 pos += tptr.length;
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77 }
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78 return nbuf;
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79 };
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80 this.close = function () {
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81 if (this.alive)
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82 this.term.kill('SIGHUP');
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