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comparison BoosterPack/logintets/.svn/text-base/login_controller.js.svn-base @ 0:0d795f02a8bb tip

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initial committ. what was I thinking?
author Robert McIntyre <rlm@mit.edu>
date Mon, 27 Sep 2010 16:57:26 -0400
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1 // js handling the login procedures
2
3 // constants
4 var NORMAL_STATE = 4;
5 var LOGIN_PREFIX = 'login.php?';
6
7 // variables
8 var http = getHTTPObject(); // We create the HTTP Object
9 var hasSeed = false;
10 var loggedIn = false;
11 var seed_id = 0;
12 var seed = 0;
13 var fullname = '';
14 var messages = '';
15
16 // getSeed method: gets a seed from the server for this transaction
17 function getSeed()
18 { // only get a seed if we're not logged in and we don't already have one
19 if (!loggedIn && !hasSeed) {
20 // open up the path
21 http.open('GET', LOGIN_PREFIX + 'task=getseed', true);
22 http.onreadystatechange = handleHttpGetSeed;
23 http.send(null);
24 }
25 }
26
27 // handleHttpGetSeed method: called when the seed is returned from the server
28 function handleHttpGetSeed()
29 {
30 // if there hasn't been any errors
31 if (http.readyState == NORMAL_STATE) {
32 // split by the divider |
33 results = http.responseText.split('|');
34
35 // id is the first element
36 seed_id = results[0];
37
38 // seed is the second element
39 seed = results[1];
40
41 // now we have the seed
42 hasSeed = true;
43 }
44 }
45
46 // validateLogin method: validates a login request
47 function validateLogin()
48 {
49 // ignore request if we are already logged in
50 if (loggedIn)
51 return;
52
53 // get form form elements 'username' and 'password'
54 username = document.getElementById('username').value;
55 password = document.getElementById('password').value;
56
57 // ignore if either is empty
58 if (username != '' && password != '') {
59 // compute the hash of the hash of the password and the seed
60 hash = hex_md5(hex_md5(password) + seed);
61
62 // open the http connection
63 http.open('GET', LOGIN_PREFIX + 'task=checklogin&username='+username+'&id='+seed_id+'&hash='+hash, true);
64
65 // where to go
66 http.onreadystatechange = handleHttpValidateLogin;
67 http.send(null);
68 }
69 }
70
71 // handleHttpValidateLogin method: called when the validation results are returned from the server
72 function handleHttpValidateLogin()
73 {
74 // did the connection work?
75 if (http.readyState == NORMAL_STATE) {
76 // split by the pipe
77 results = http.responseText.split('|');
78 if (results[0] == 'true')
79 {
80 hasSeed = false;
81 loggedIn = true;
82 fullname = results[1];
83 messages = '';
84 }
85 else
86 {
87 messages = results[1];
88 }
89 showLogin();
90 }
91 }
92
93 // resetLogin method: if logged in, 'logs out' and allows a different user/pass to be entered
94 function resetLogin()
95 {
96 loggedIn = false;
97 hasSeed = false;
98 }