Mercurial > hg > rlgwebd
annotate webtty.js @ 7:d1b3c3af34d6
WebTTY: switch terminal size to 80x25.
author | John "Elwin" Edwards <elwin@sdf.org> |
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date | Mon, 07 May 2012 16:03:10 -0700 |
parents | bfdc775a574f |
children | 826a7ced69f8 |
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Put this project under version control, finally.
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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 child_process = require("child_process"); |
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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) { |
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18 var childenv = {}; |
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19 for (var key in process.env) { |
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20 if (!(key in env_dontuse)) |
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21 childenv[key] = process.env[key]; |
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22 } |
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23 childenv["PTYHELPER"] = "25x80"; |
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24 // Should setsid get set? |
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25 var spawnopts = {"env": childenv, "cwd": process.env["HOME"]}; |
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26 this.child = child_process.spawn(ptyhelp, ["bash"], spawnopts); |
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27 var ss = this; |
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28 /* Eventually we'll need to make sure the sessid isn't in use yet. */ |
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29 this.sessid = sessid; |
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30 this.alive = true; |
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31 this.data = []; |
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32 this.child.stdout.on("data", function (buf) { |
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33 ss.data.push(buf); |
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34 }); |
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35 this.child.stderr.on("data", function (buf) { |
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36 ss.data.push(buf); |
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37 }); |
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38 this.child.on("exit", function (code, signal) { |
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39 ss.exitcode = (code != null ? code : 255); |
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40 ss.alive = false; |
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41 /* Wait for all the data to get collected */ |
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42 setTimeout(ss.cleanup, 1000); |
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43 }); |
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44 this.write = function (data) { |
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45 if (this.alive) |
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46 this.child.stdin.write(data); |
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47 /* Otherwise, throw some kind of exception? */ |
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48 }; |
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49 this.read = function () { |
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50 if (this.data.length == 0) |
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51 return null; |
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52 var pos = 0; |
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53 var i = 0; |
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54 for (i = 0; i < this.data.length; i++) |
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55 pos += this.data[i].length; |
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56 var nbuf = new Buffer(pos); |
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57 var tptr; |
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58 pos = 0; |
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59 while (this.data.length > 0) { |
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60 tptr = this.data.shift(); |
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61 tptr.copy(nbuf, pos); |
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62 pos += tptr.length; |
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63 } |
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64 return nbuf; |
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65 }; |
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66 this.close = function () { |
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67 if (this.alive) |
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68 this.child.kill('SIGHUP'); |
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69 }; |
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70 this.cleanup = function () { |
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71 /* Call this when the child is dead. */ |
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72 if (this.alive) |
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73 return; |
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74 /* Give the client a chance to read any leftover data. */ |
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75 if (ss.data.length > 0) |
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76 setTimeout(ss.remove, 8000); |
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77 else |
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78 ss.remove(); |
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79 }; |
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80 this.remove = function () { |
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81 delete sessions[ss.sessid]; |
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82 console.log("Session " + this.sessid + " removed."); |
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83 }; |
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84 sessions[sessid] = this; |
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85 } |
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86 |
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