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
|
// Copyright Joyent, Inc. and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.
'use strict';
const common = require('../common');
const assert = require('assert');
const http = require('http');
const server = http.createServer(function(req, res) {
res.writeHead(200, { 'Content-Type': 'text/plain' });
res.end('Hello World\n');
}).listen(0, common.mustCall(function() {
const agent = new http.Agent({ maxSockets: 1 });
agent.on('free', function(socket) {
console.log('freeing socket. destroyed? ', socket.destroyed);
});
const requestOptions = {
agent: agent,
host: 'localhost',
port: this.address().port,
path: '/'
};
const request1 = http.get(requestOptions, common.mustCall(function(response) {
// assert request2 is queued in the agent
const key = agent.getName(requestOptions);
assert.strictEqual(agent.requests[key].length, 1);
console.log('got response1');
request1.socket.on('close', function() {
console.log('request1 socket closed');
});
response.pipe(process.stdout);
response.on('end', common.mustCall(function() {
console.log('response1 done');
/////////////////////////////////
//
// THE IMPORTANT PART
//
// It is possible for the socket to get destroyed and other work
// to run before the 'close' event fires because it happens on
// nextTick. This example is contrived because it destroys the
// socket manually at just the right time, but at Voxer we have
// seen cases where the socket is destroyed by non-user code
// then handed out again by an agent *before* the 'close' event
// is triggered.
request1.socket.destroy();
response.once('close', function() {
// assert request2 was removed from the queue
assert(!agent.requests[key]);
console.log("waiting for request2.onSocket's nextTick");
process.nextTick(common.mustCall(function() {
// assert that the same socket was not assigned to request2,
// since it was destroyed.
assert.notStrictEqual(request1.socket, request2.socket);
assert(!request2.socket.destroyed, 'the socket is destroyed');
}));
});
}));
}));
const request2 = http.get(requestOptions, common.mustCall(function(response) {
assert(!request2.socket.destroyed);
assert(request1.socket.destroyed);
// assert not reusing the same socket, since it was destroyed.
assert.notStrictEqual(request1.socket, request2.socket);
console.log('got response2');
let gotClose = false;
let gotResponseEnd = false;
request2.socket.on('close', function() {
console.log('request2 socket closed');
gotClose = true;
done();
});
response.pipe(process.stdout);
response.on('end', function() {
console.log('response2 done');
gotResponseEnd = true;
done();
});
function done() {
if (gotResponseEnd && gotClose)
server.close();
}
}));
}));
|
