61 lines
1.5 KiB
JavaScript
61 lines
1.5 KiB
JavaScript
|
var once = require('once');
|
||
|
|
|
||
|
|
var noop = function() {};
|
||
|
|
|
||
|
|
var isRequest = function(stream) {
|
||
|
|
return stream.setHeader && typeof stream.abort === 'function';
|
||
|
|
};
|
||
|
|
|
||
|
|
var eos = function(stream, opts, callback) {
|
||
|
|
if (typeof opts === 'function') return eos(stream, null, opts);
|
||
|
|
if (!opts) opts = {};
|
||
|
|
|
||
|
|
callback = once(callback || noop);
|
||
|
|
|
||
|
|
var ws = stream._writableState;
|
||
|
|
var rs = stream._readableState;
|
||
|
|
var readable = opts.readable || (opts.readable !== false && stream.readable);
|
||
|
|
var writable = opts.writable || (opts.writable !== false && stream.writable);
|
||
|
|
|
||
|
|
var onlegacyfinish = function() {
|
||
|
|
if (!stream.writable) onfinish();
|
||
|
|
};
|
||
|
|
|
||
|
|
var onfinish = function() {
|
||
|
|
writable = false;
|
||
|
|
if (!readable) callback();
|
||
|
|
};
|
||
|
|
|
||
|
|
var onend = function() {
|
||
|
|
readable = false;
|
||
|
|
if (!writable) callback();
|
||
|
|
};
|
||
|
|
|
||
|
|
var onclose = function() {
|
||
|
|
if (readable && !(rs && rs.ended)) return callback(new Error('premature close'));
|
||
|
|
if (writable && !(ws && ws.ended)) return callback(new Error('premature close'));
|
||
|
|
};
|
||
|
|
|
||
|
|
var onrequest = function() {
|
||
|
|
stream.req.on('finish', onfinish);
|
||
|
|
};
|
||
|
|
|
||
|
|
if (isRequest(stream)) {
|
||
|
|
stream.on('complete', onfinish);
|
||
|
|
stream.on('abort', onclose);
|
||
|
|
if (stream.req) onrequest();
|
||
|
|
else stream.on('request', onrequest);
|
||
|
|
} else if (writable && !ws) { // legacy streams
|
||
|
|
stream.on('end', onlegacyfinish);
|
||
|
|
stream.on('close', onlegacyfinish);
|
||
|
|
}
|
||
|
|
|
||
|
|
stream.on('end', onend);
|
||
|
|
stream.on('finish', onfinish);
|
||
|
|
if (opts.error !== false) stream.on('error', callback);
|
||
|
|
stream.on('close', onclose);
|
||
|
|
|
||
|
|
return stream;
|
||
|
|
};
|
||
|
|
|
||
|
|
module.exports = eos;
|