You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
76 lines
1.6 KiB
76 lines
1.6 KiB
"use strict";
|
|
|
|
var stream = require("readable-stream");
|
|
|
|
function DuplexWrapper(options, writable, readable) {
|
|
if (typeof readable === "undefined") {
|
|
readable = writable;
|
|
writable = options;
|
|
options = null;
|
|
}
|
|
|
|
stream.Duplex.call(this, options);
|
|
|
|
if (typeof readable.read !== "function") {
|
|
readable = (new stream.Readable(options)).wrap(readable);
|
|
}
|
|
|
|
this._writable = writable;
|
|
this._readable = readable;
|
|
this._waiting = false;
|
|
|
|
var self = this;
|
|
|
|
writable.once("finish", function() {
|
|
self.end();
|
|
});
|
|
|
|
this.once("finish", function() {
|
|
writable.end();
|
|
});
|
|
|
|
readable.on("readable", function() {
|
|
if (self._waiting) {
|
|
self._waiting = false;
|
|
self._read();
|
|
}
|
|
});
|
|
|
|
readable.once("end", function() {
|
|
self.push(null);
|
|
});
|
|
|
|
if (!options || typeof options.bubbleErrors === "undefined" || options.bubbleErrors) {
|
|
writable.on("error", function(err) {
|
|
self.emit("error", err);
|
|
});
|
|
|
|
readable.on("error", function(err) {
|
|
self.emit("error", err);
|
|
});
|
|
}
|
|
}
|
|
|
|
DuplexWrapper.prototype = Object.create(stream.Duplex.prototype, {constructor: {value: DuplexWrapper}});
|
|
|
|
DuplexWrapper.prototype._write = function _write(input, encoding, done) {
|
|
this._writable.write(input, encoding, done);
|
|
};
|
|
|
|
DuplexWrapper.prototype._read = function _read() {
|
|
var buf;
|
|
var reads = 0;
|
|
while ((buf = this._readable.read()) !== null) {
|
|
this.push(buf);
|
|
reads++;
|
|
}
|
|
if (reads === 0) {
|
|
this._waiting = true;
|
|
}
|
|
};
|
|
|
|
module.exports = function duplex2(options, writable, readable) {
|
|
return new DuplexWrapper(options, writable, readable);
|
|
};
|
|
|
|
module.exports.DuplexWrapper = DuplexWrapper;
|
|
|