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
|
#!/usr/bin/env node
/* jshint node: true */
'use strict';
// This needs to be here to make sure the pipe stays open.
// We're waiting until the stdin pipe gets closed (e.g. because the parent
// process dies)
process.stdin.on('readable', function() {});
process.stdin.on('end', function() { process.exit(0); });
var fs = require('fs');
var express = require('express');
var app = express();
// We're manually setting Etag headers.
app.disable('etag');
app.get('/test', function (req, res) {
if (req.query.modified) {
res.setHeader('Last-Modified', (new Date(req.query.modified * 1000)).toUTCString());
}
if (req.query.expires) {
res.setHeader('Expires', (new Date(req.query.expires * 1000)).toUTCString());
}
if (req.query.etag) {
res.setHeader('ETag', req.query.etag);
}
if (req.query.cachecontrol) {
res.setHeader('Cache-Control', req.query.cachecontrol);
}
res.send('Hello World!');
});
app.get('/stale/*', function() {
// Never respond.
});
var cacheCounter = 0;
app.get('/cache', function(req, res) {
res.setHeader('Cache-Control', 'max-age=30'); // Allow caching for 30 seconds
res.send('Response ' + (++cacheCounter));
});
app.get('/revalidate-same', function(req, res) {
if (req.headers['if-none-match'] == 'snowfall') {
// Second request can be cached for 30 seconds.
res.setHeader('Cache-Control', 'max-age=30');
res.status(304).end();
} else {
// First request must always be revalidated.
res.setHeader('ETag', 'snowfall');
res.setHeader('Cache-Control', 'must-revalidate');
res.status(200).send('Response');
}
});
app.get('/revalidate-modified', function(req, res) {
var jan1 = new Date('jan 1 2015 utc');
if (req.headers['if-modified-since']) {
var modified_since = new Date(req.headers['if-modified-since']);
if (modified_since >= jan1) {
res.setHeader('Cache-Control', 'max-age=30');
res.status(304).end();
return;
}
}
// First request must always be revalidated.
res.setHeader('Last-Modified', jan1.toUTCString());
res.setHeader('Cache-Control', 'must-revalidate');
res.status(200).send('Response');
});
var revalidateEtagCounter = 1;
app.get('/revalidate-etag', function(req, res) {
res.setHeader('ETag', 'response-' + revalidateEtagCounter);
res.setHeader('Cache-Control', 'must-revalidate');
res.status(200).send('Response ' + revalidateEtagCounter);
revalidateEtagCounter++;
});
app.get('/not-found', function(req, res) {
res.status(404).send('Not Found!');
});
app.get('/permanent-error', function(req, res) {
res.status(500).send('Server Error!');
});
var temporaryErrorCounter = 0;
app.get('/temporary-error', function(req, res) {
if (temporaryErrorCounter === 0) {
res.status(500).end();
} else {
res.status(200).send('Hello World!');
}
temporaryErrorCounter++;
});
app.get('/delayed', function(req, res) {
setTimeout(function() {
res.status(200).send('Response');
}, 200);
});
app.get('/load/:number(\\d+)', function(req, res) {
res.send('Request ' + req.params.number);
});
var server = app.listen(3000, function () {
// Tell parent that we're now listening.
process.stdout.write("OK");
});
|
