forked from CesiumGS/3d-tiles-samples
-
Notifications
You must be signed in to change notification settings - Fork 0
/
server.js
208 lines (176 loc) · 7.13 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
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
(function() {
'use strict';
/*global console,require,__dirname,process*/
/*jshint es3:false*/
var express = require('express');
var compression = require('compression');
var fs = require('fs');
var url = require('url');
var request = require('request');
var gzipHeader = Buffer.from("1F8B08", "hex");
var yargs = require('yargs').options({
'port' : {
'default' : process.env.PORT || 8003,
'description' : 'Port to listen on.'
},
'public' : {
'type' : 'boolean',
'description' : 'Run a public server that listens on all interfaces.'
},
'upstream-proxy' : {
'description' : 'A standard proxy server that will be used to retrieve data. Specify a URL including port, e.g. "http://proxy:8000".'
},
'bypass-upstream-proxy-hosts' : {
'description' : 'A comma separated list of hosts that will bypass the specified upstream_proxy, e.g. "lanhost1,lanhost2"'
},
'help' : {
'alias' : 'h',
'type' : 'boolean',
'description' : 'Show this help.'
}
});
var argv = yargs.argv;
if (argv.help) {
return yargs.showHelp();
}
// eventually this mime type configuration will need to change
// https://github.com/visionmedia/send/commit/d2cb54658ce65948b0ed6e5fb5de69d022bef941
var mime = express.static.mime;
mime.define({
'application/json' : ['czml', 'json', 'geojson', 'topojson'],
'model/vnd.gltf+json' : ['gltf'],
'model/vnd.gltf.binary' : ['glb'],
'application/octet-stream' : ['b3dm', 'pnts', 'i3dm', 'cmpt'],
'text/plain' : ['glsl']
});
var app = express();
app.use(compression());
app.use(function(req, res, next) {
res.header("Access-Control-Allow-Origin", "*");
res.header("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept");
next();
});
function checkGzipAndNext(req, res, next) {
var buffer = Buffer.alloc(3);
var reqUrl = url.parse(req.url, true);
var filePath = reqUrl.pathname.substring(1);
var readStream = fs.createReadStream(filePath, { start: 0, end: 2 });
readStream.on('error', function(err) {
next();
});
readStream.on('data', function(chunk) {
if (chunk.equals(gzipHeader)) {
res.header('Content-Encoding', 'gzip');
}
next();
});
}
var knownTilesetFormats = [/\.b3dm/, /\.pnts/, /\.i3dm/, /\.cmpt/, /\.glb/, /tileset.*\.json$/];
app.get(knownTilesetFormats, checkGzipAndNext);
// Custom code for serving TilesetWithExpiration. When points.pnts is requested it cycles between the tiles in the cache folder.
var expirationPntsPath = '/tilesets/TilesetWithExpiration/points.pnts';
var expirationCacheDirectory = '/tilesets/TilesetWithExpiration/cache/';
var expirationCacheLength = 5;
var expireCount = 0;
app.use(expirationPntsPath, function(req, res) {
var pntsPath = expirationCacheDirectory + 'points_' + expireCount + '.pnts';
expireCount = (expireCount + 1) % expirationCacheLength;
res.sendFile(pntsPath, {root: __dirname});
// Don't call next() because we don't need to run the express.static middleware
});
app.use(express.static(__dirname));
function getRemoteUrlFromParam(req) {
var remoteUrl = req.params[0];
if (remoteUrl) {
// add http:// to the URL if no protocol is present
if (!/^https?:\/\//.test(remoteUrl)) {
remoteUrl = 'http://' + remoteUrl;
}
remoteUrl = url.parse(remoteUrl);
// copy query string
remoteUrl.search = url.parse(req.url).search;
}
return remoteUrl;
}
var dontProxyHeaderRegex = /^(?:Host|Proxy-Connection|Connection|Keep-Alive|Transfer-Encoding|TE|Trailer|Proxy-Authorization|Proxy-Authenticate|Upgrade)$/i;
function filterHeaders(req, headers) {
var result = {};
// filter out headers that are listed in the regex above
Object.keys(headers).forEach(function(name) {
if (!dontProxyHeaderRegex.test(name)) {
result[name] = headers[name];
}
});
return result;
}
var upstreamProxy = argv['upstream-proxy'];
var bypassUpstreamProxyHosts = {};
if (argv['bypass-upstream-proxy-hosts']) {
argv['bypass-upstream-proxy-hosts'].split(',').forEach(function(host) {
bypassUpstreamProxyHosts[host.toLowerCase()] = true;
});
}
app.get('/proxy/*', function(req, res, next) {
// look for request like http://localhost:8080/proxy/http://example.com/file?query=1
var remoteUrl = getRemoteUrlFromParam(req);
if (!remoteUrl) {
// look for request like http://localhost:8080/proxy/?http%3A%2F%2Fexample.com%2Ffile%3Fquery%3D1
remoteUrl = Object.keys(req.query)[0];
if (remoteUrl) {
remoteUrl = url.parse(remoteUrl);
}
}
if (!remoteUrl) {
return res.send(400, 'No url specified.');
}
if (!remoteUrl.protocol) {
remoteUrl.protocol = 'http:';
}
var proxy;
if (upstreamProxy && !(remoteUrl.host in bypassUpstreamProxyHosts)) {
proxy = upstreamProxy;
}
// encoding : null means "body" passed to the callback will be raw bytes
request.get({
url : url.format(remoteUrl),
headers : filterHeaders(req, req.headers),
encoding : null,
proxy : proxy
}, function(error, response, body) {
var code = 500;
if (response) {
code = response.statusCode;
res.header(filterHeaders(req, response.headers));
}
res.send(code, body);
});
});
var server = app.listen(argv.port, argv.public ? undefined : 'localhost', function() {
if (argv.public) {
console.log('Cesium development server running publicly. Connect to http://localhost:%d/', server.address().port);
} else {
console.log('Cesium development server running locally. Connect to http://localhost:%d/', server.address().port);
}
});
server.on('error', function (e) {
if (e.code === 'EADDRINUSE') {
console.log('Error: Port %d is already in use, select a different port.', argv.port);
console.log('Example: node server.js --port %d', argv.port + 1);
} else if (e.code === 'EACCES') {
console.log('Error: This process does not have permission to listen on port %d.', argv.port);
if (argv.port < 1024) {
console.log('Try a port number higher than 1024.');
}
}
console.log(e);
process.exit(1);
});
server.on('close', function() {
console.log('Cesium development server stopped.');
});
process.on('SIGINT', function() {
server.close(function() {
process.exit(0);
});
});
})();