-
Notifications
You must be signed in to change notification settings - Fork 0
/
server.js
186 lines (154 loc) · 4.71 KB
/
server.js
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
const http = require('http');
const fs = require('fs')
const querystring = require('querystring')
http.createServer(route({
'/login': login,
'/signup': signup,
'/': loginRequired(home),
})).listen(8080);
// -- component, global args and utils
class Storage {
constructor(path) {
if (!fs.existsSync(path)) {
fs.mkdirSync(path);
}
this.path = path;
}
get(key) {
const file = this.path + key + ".json";
if (fs.existsSync(file)) {
return JSON.parse(fs.readFileSync(file));
}
return {}
}
set(key, data) {
const file = this.path + key + ".json";
fs.writeFileSync(file, JSON.stringify(data))
}
}
function parseCookies(req) {
let cks = {}
if (req.headers.cookie) {
const cookies = req.headers.cookie.split(';');
let cookie = '';
for (let idx = 0; idx < cookies.length; idx++) {
cookie = cookies[idx]
const parts = cookie.match(/(.*?)=(.*)$/);
cks[parts[1].trim()] = parts[2] || '';
}
}
return cks;
}
const SESSIONID_KEY = 'sid'
const users = new Storage("/tmp/users/")
const sessions = new Storage("/tmp/sessions/")
// -- route
function route(routes) {
return function(req, res) {
if (req.url in routes) {
routes[req.url](req, res)
} else {
render(req, res, 404, null)
}
}
}
// -- middleware
function loginRequired(func) {
return function(req, res) {
const cookies = parseCookies(req)
if (SESSIONID_KEY in cookies) {
const session = sessions.get(cookies[SESSIONID_KEY]);
return func(req, res)
}
res.writeHead(302, {
'Location': '/login'
});
res.end();
}
}
// -- render | view
const tplPath = "./tpls/"
function getTplPath(req) {
const filename = req.url.replace('/', '') || 'home';
return tplPath + filename + ".html";
}
function render(req, res, status, data) {
res.setHeader('Content-Type', 'text/html');
res.writeHead(status);
res.end(renderTpl(getTplPath(req), data))
}
const tplPReg = /{{\s+([a-zA-Z][a-zA-Z\d]+)\s+}}/g
function renderTpl(tpl, data) {
if (!fs.existsSync(tpl)) {
return '';
}
const c = fs.readFileSync(tpl).toString();
return c.replace(tplPReg, function(full, arg){
if (data && arg in data) {
return data[arg];
}
return '';
})
}
// -- controller
function login(req, res) {
if (req.method=="POST") {
let body = ''
req.on('data', function(chunk){
body += chunk.toString();
})
req.on('end', function(){
const form = querystring.parse(body)
const un = form.username || '';
const pwd = form.password || '';
if (!un || !pwd) {
return render(req, res, 422, {'username': un, 'msg': 'username and password are both required!'})
}
const user = users.get(un)
if ('password' in user && user['password'] == pwd) {
return releaseTokenThenRedirectToHome(res, un)
}
render(req, res, 401, {'username': un, 'msg': 'username or password is not correct!'})
});
} else {
render(req, res, 200)
}
}
function signup(req, res) {
if (req.method=="POST") {
let body = ''
req.on('data', function(chunk){
body += chunk.toString();
})
req.on('end', function(){
const form = querystring.parse(body)
const un = form.username || '';
const pwd = form.password || '';
if (!un || !pwd) {
return render(req, res, 422, {'username': un, 'msg': 'username and password are both required!'})
}
const exists = users.get(un)
if (Object.keys(exists).length>0) {
render(req, res, 422, {'username': un, 'msg': 'username has been token!'})
return
}
users.set(un, {'username': un, 'password': pwd})
releaseTokenThenRedirectToHome(res, un)
});
} else {
render(req, res, 200);
}
}
function home(req, res) {
const cookies = parseCookies(req)
const session = sessions.get(cookies[SESSIONID_KEY]);
render(req, res, 200, session)
}
function releaseTokenThenRedirectToHome(res, username) {
// need to redirect with a real html page
// or cookie could not be set in some web brower
const sid = 's' + (Date.now());
sessions.set(sid, {'username': username});
res.setHeader('Set-Cookie', SESSIONID_KEY + '=' + sid)
res.end('<html><head><meta http-equiv="refresh" content="2;url=/" /></head></html>')
}