-
Notifications
You must be signed in to change notification settings - Fork 0
/
static-server.js
243 lines (221 loc) · 6.38 KB
/
static-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
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
var util = require('util'),
http = require('http'),
fs = require('fs'),
url = require('url'),
events = require('events');
var DEFAULT_PORT = 7777;
function main(argv) {
new HttpServer({
'GET': createServlet(StaticServlet),
'HEAD': createServlet(StaticServlet)
}).start(Number(argv[2]) || DEFAULT_PORT);
}
function escapeHtml(value) {
return value.toString().
replace('<', '<').
replace('>', '>').
replace('"', '"');
}
function createServlet(Class) {
var servlet = new Class();
return servlet.handleRequest.bind(servlet);
}
/**
* An Http server implementation that uses a map of methods to decide
* action routing.
*
* @param {Object} Map of method => Handler function
*/
function HttpServer(handlers) {
this.handlers = handlers;
this.server = http.createServer(this.handleRequest_.bind(this));
}
HttpServer.prototype.start = function(port) {
this.port = port;
this.server.listen(port);
util.puts('Http Server running at http://localhost:' + port + '/');
};
HttpServer.prototype.parseUrl_ = function(urlString) {
var parsed = url.parse(urlString);
parsed.pathname = url.resolve('/', parsed.pathname);
return url.parse(url.format(parsed), true);
};
HttpServer.prototype.handleRequest_ = function(req, res) {
var logEntry = req.method + ' ' + req.url;
if (req.headers['user-agent']) {
logEntry += ' ' + req.headers['user-agent'];
}
util.puts(logEntry);
req.url = this.parseUrl_(req.url);
var handler = this.handlers[req.method];
if (!handler) {
res.writeHead(501);
res.end();
} else {
handler.call(this, req, res);
}
};
/**
* Handles static content.
*/
function StaticServlet() {}
StaticServlet.MimeMap = {
'txt': 'text/plain',
'html': 'text/html',
'css': 'text/css',
'xml': 'application/xml',
'json': 'application/json',
'js': 'application/javascript',
'jpg': 'image/jpeg',
'jpeg': 'image/jpeg',
'gif': 'image/gif',
'png': 'image/png',
'svg': 'image/svg+xml'
};
StaticServlet.prototype.handleRequest = function(req, res) {
var self = this;
var path = ('./' + req.url.pathname).replace('//','/').replace(/%(..)/g, function(match, hex){
return String.fromCharCode(parseInt(hex, 16));
});
var parts = path.split('/');
if (parts[parts.length-1].charAt(0) === '.')
return self.sendForbidden_(req, res, path);
fs.stat(path, function(err, stat) {
if (err)
return self.sendMissing_(req, res, path);
if (stat.isDirectory())
return self.sendDirectory_(req, res, path);
return self.sendFile_(req, res, path);
});
}
StaticServlet.prototype.sendError_ = function(req, res, error) {
res.writeHead(500, {
'Content-Type': 'text/html'
});
res.write('<!doctype html>\n');
res.write('<title>Internal Server Error</title>\n');
res.write('<h1>Internal Server Error</h1>');
res.write('<pre>' + escapeHtml(util.inspect(error)) + '</pre>');
util.puts('500 Internal Server Error');
util.puts(util.inspect(error));
};
StaticServlet.prototype.sendMissing_ = function(req, res, path) {
path = path.substring(1);
res.writeHead(404, {
'Content-Type': 'text/html'
});
res.write('<!doctype html>\n');
res.write('<title>404 Not Found</title>\n');
res.write('<h1>Not Found</h1>');
res.write(
'<p>The requested URL ' +
escapeHtml(path) +
' was not found on this server.</p>'
);
res.end();
util.puts('404 Not Found: ' + path);
};
StaticServlet.prototype.sendForbidden_ = function(req, res, path) {
path = path.substring(1);
res.writeHead(403, {
'Content-Type': 'text/html'
});
res.write('<!doctype html>\n');
res.write('<title>403 Forbidden</title>\n');
res.write('<h1>Forbidden</h1>');
res.write(
'<p>You do not have permission to access ' +
escapeHtml(path) + ' on this server.</p>'
);
res.end();
util.puts('403 Forbidden: ' + path);
};
StaticServlet.prototype.sendRedirect_ = function(req, res, redirectUrl) {
res.writeHead(301, {
'Content-Type': 'text/html',
'Location': redirectUrl
});
res.write('<!doctype html>\n');
res.write('<title>301 Moved Permanently</title>\n');
res.write('<h1>Moved Permanently</h1>');
res.write(
'<p>The document has moved <a href="' +
redirectUrl +
'">here</a>.</p>'
);
res.end();
util.puts('301 Moved Permanently: ' + redirectUrl);
};
StaticServlet.prototype.sendFile_ = function(req, res, path) {
var self = this;
var file = fs.createReadStream(path);
res.writeHead(200, {
'Content-Type': StaticServlet.
MimeMap[path.split('.').pop()] || 'text/plain'
});
if (req.method === 'HEAD') {
res.end();
} else {
file.on('data', res.write.bind(res));
file.on('close', function() {
res.end();
});
file.on('error', function(error) {
self.sendError_(req, res, error);
});
}
};
StaticServlet.prototype.sendDirectory_ = function(req, res, path) {
var self = this;
if (path.match(/[^\/]$/)) {
req.url.pathname += '/';
var redirectUrl = url.format(url.parse(url.format(req.url)));
return self.sendRedirect_(req, res, redirectUrl);
}
fs.readdir(path, function(err, files) {
if (err)
return self.sendError_(req, res, error);
if (!files.length)
return self.writeDirectoryIndex_(req, res, path, []);
var remaining = files.length;
files.forEach(function(fileName, index) {
fs.stat(path + '/' + fileName, function(err, stat) {
if (err)
return self.sendError_(req, res, err);
if (stat.isDirectory()) {
files[index] = fileName + '/';
}
if (!(--remaining))
return self.writeDirectoryIndex_(req, res, path, files);
});
});
});
};
StaticServlet.prototype.writeDirectoryIndex_ = function(req, res, path, files) {
path = path.substring(1);
res.writeHead(200, {
'Content-Type': 'text/html'
});
if (req.method === 'HEAD') {
res.end();
return;
}
res.write('<!doctype html>\n');
res.write('<title>' + escapeHtml(path) + '</title>\n');
res.write('<style>\n');
res.write(' ol { list-style-type: none; font-size: 1.2em; }\n');
res.write('</style>\n');
res.write('<h1>Directory: ' + escapeHtml(path) + '</h1>');
res.write('<ol>');
files.forEach(function(fileName) {
if (fileName.charAt(0) !== '.') {
res.write('<li><a href="' +
escapeHtml(fileName) + '">' +
escapeHtml(fileName) + '</a></li>');
}
});
res.write('</ol>');
res.end();
};
// Must be last,
main(process.argv);