1
|
var once = require('once');
|
2
|
|
3
|
var noop = function() {};
|
4
|
|
5
|
var isRequest = function(stream) {
|
6
|
return stream.setHeader && typeof stream.abort === 'function';
|
7
|
};
|
8
|
|
9
|
var isChildProcess = function(stream) {
|
10
|
return stream.stdio && Array.isArray(stream.stdio) && stream.stdio.length === 3
|
11
|
};
|
12
|
|
13
|
var eos = function(stream, opts, callback) {
|
14
|
if (typeof opts === 'function') return eos(stream, null, opts);
|
15
|
if (!opts) opts = {};
|
16
|
|
17
|
callback = once(callback || noop);
|
18
|
|
19
|
var ws = stream._writableState;
|
20
|
var rs = stream._readableState;
|
21
|
var readable = opts.readable || (opts.readable !== false && stream.readable);
|
22
|
var writable = opts.writable || (opts.writable !== false && stream.writable);
|
23
|
var cancelled = false;
|
24
|
|
25
|
var onlegacyfinish = function() {
|
26
|
if (!stream.writable) onfinish();
|
27
|
};
|
28
|
|
29
|
var onfinish = function() {
|
30
|
writable = false;
|
31
|
if (!readable) callback.call(stream);
|
32
|
};
|
33
|
|
34
|
var onend = function() {
|
35
|
readable = false;
|
36
|
if (!writable) callback.call(stream);
|
37
|
};
|
38
|
|
39
|
var onexit = function(exitCode) {
|
40
|
callback.call(stream, exitCode ? new Error('exited with error code: ' + exitCode) : null);
|
41
|
};
|
42
|
|
43
|
var onerror = function(err) {
|
44
|
callback.call(stream, err);
|
45
|
};
|
46
|
|
47
|
var onclose = function() {
|
48
|
process.nextTick(onclosenexttick);
|
49
|
};
|
50
|
|
51
|
var onclosenexttick = function() {
|
52
|
if (cancelled) return;
|
53
|
if (readable && !(rs && (rs.ended && !rs.destroyed))) return callback.call(stream, new Error('premature close'));
|
54
|
if (writable && !(ws && (ws.ended && !ws.destroyed))) return callback.call(stream, new Error('premature close'));
|
55
|
};
|
56
|
|
57
|
var onrequest = function() {
|
58
|
stream.req.on('finish', onfinish);
|
59
|
};
|
60
|
|
61
|
if (isRequest(stream)) {
|
62
|
stream.on('complete', onfinish);
|
63
|
stream.on('abort', onclose);
|
64
|
if (stream.req) onrequest();
|
65
|
else stream.on('request', onrequest);
|
66
|
} else if (writable && !ws) { // legacy streams
|
67
|
stream.on('end', onlegacyfinish);
|
68
|
stream.on('close', onlegacyfinish);
|
69
|
}
|
70
|
|
71
|
if (isChildProcess(stream)) stream.on('exit', onexit);
|
72
|
|
73
|
stream.on('end', onend);
|
74
|
stream.on('finish', onfinish);
|
75
|
if (opts.error !== false) stream.on('error', onerror);
|
76
|
stream.on('close', onclose);
|
77
|
|
78
|
return function() {
|
79
|
cancelled = true;
|
80
|
stream.removeListener('complete', onfinish);
|
81
|
stream.removeListener('abort', onclose);
|
82
|
stream.removeListener('request', onrequest);
|
83
|
if (stream.req) stream.req.removeListener('finish', onfinish);
|
84
|
stream.removeListener('end', onlegacyfinish);
|
85
|
stream.removeListener('close', onlegacyfinish);
|
86
|
stream.removeListener('finish', onfinish);
|
87
|
stream.removeListener('exit', onexit);
|
88
|
stream.removeListener('end', onend);
|
89
|
stream.removeListener('error', onerror);
|
90
|
stream.removeListener('close', onclose);
|
91
|
};
|
92
|
};
|
93
|
|
94
|
module.exports = eos;
|