91 lines
2.6 KiB
JavaScript
91 lines
2.6 KiB
JavaScript
// Ported from https://github.com/mafintosh/end-of-stream with
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// permission from the author, Mathias Buus (@mafintosh).
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'use strict';
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var ERR_STREAM_PREMATURE_CLOSE = require('../../../errors').codes.ERR_STREAM_PREMATURE_CLOSE;
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function noop() {}
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function isRequest(stream) {
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return stream.setHeader && typeof stream.abort === 'function';
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}
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function once(callback) {
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var called = false;
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return function (err) {
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if (called) return;
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called = true;
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callback.call(this, err);
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};
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}
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function eos(stream, opts, callback) {
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if (typeof opts === 'function') return eos(stream, null, opts);
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if (!opts) opts = {};
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callback = once(callback || noop);
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var ws = stream._writableState;
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var rs = stream._readableState;
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var readable = opts.readable || opts.readable !== false && stream.readable;
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var writable = opts.writable || opts.writable !== false && stream.writable;
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var onlegacyfinish = function onlegacyfinish() {
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if (!stream.writable) onfinish();
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};
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var onfinish = function onfinish() {
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writable = false;
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if (!readable) callback.call(stream);
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};
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var onend = function onend() {
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readable = false;
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if (!writable) callback.call(stream);
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};
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var onerror = function onerror(err) {
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callback.call(stream, err);
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};
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var onclose = function onclose() {
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if (readable && !(rs && rs.ended)) {
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return callback.call(stream, new ERR_STREAM_PREMATURE_CLOSE());
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}
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if (writable && !(ws && ws.ended)) {
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return callback.call(stream, new ERR_STREAM_PREMATURE_CLOSE());
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}
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};
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var onrequest = function onrequest() {
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stream.req.on('finish', onfinish);
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};
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if (isRequest(stream)) {
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stream.on('complete', onfinish);
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stream.on('abort', onclose);
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if (stream.req) onrequest();else stream.on('request', onrequest);
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} else if (writable && !ws) {
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// legacy streams
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stream.on('end', onlegacyfinish);
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stream.on('close', onlegacyfinish);
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}
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stream.on('end', onend);
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stream.on('finish', onfinish);
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if (opts.error !== false) stream.on('error', onerror);
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stream.on('close', onclose);
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return function () {
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stream.removeListener('complete', onfinish);
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stream.removeListener('abort', onclose);
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stream.removeListener('request', onrequest);
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if (stream.req) stream.req.removeListener('finish', onfinish);
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stream.removeListener('end', onlegacyfinish);
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stream.removeListener('close', onlegacyfinish);
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stream.removeListener('finish', onfinish);
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stream.removeListener('end', onend);
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stream.removeListener('error', onerror);
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stream.removeListener('close', onclose);
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};
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}
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module.exports = eos; |