63 lines
1.4 KiB
JavaScript
63 lines
1.4 KiB
JavaScript
|
var stream = require("readable-stream");
|
||
|
|
|
||
|
|
var duplex2 = module.exports = function duplex2(options, writable, readable) {
|
||
|
|
return new DuplexWrapper(options, writable, readable);
|
||
|
|
};
|
||
|
|
|
||
|
|
var DuplexWrapper = exports.DuplexWrapper = function DuplexWrapper(options, writable, readable) {
|
||
|
|
if (typeof readable === "undefined") {
|
||
|
|
readable = writable;
|
||
|
|
writable = options;
|
||
|
|
options = null;
|
||
|
|
}
|
||
|
|
|
||
|
|
options = options || {};
|
||
|
|
options.objectMode = true;
|
||
|
|
|
||
|
|
stream.Duplex.call(this, options);
|
||
|
|
|
||
|
|
this._bubbleErrors = (typeof options.bubbleErrors === "undefined") || !!options.bubbleErrors;
|
||
|
|
|
||
|
|
this._writable = writable;
|
||
|
|
this._readable = readable;
|
||
|
|
|
||
|
|
var self = this;
|
||
|
|
|
||
|
|
writable.once("finish", function() {
|
||
|
|
self.end();
|
||
|
|
});
|
||
|
|
|
||
|
|
this.once("finish", function() {
|
||
|
|
writable.end();
|
||
|
|
});
|
||
|
|
|
||
|
|
readable.on("data", function(e) {
|
||
|
|
if (!self.push(e)) {
|
||
|
|
readable.pause();
|
||
|
|
}
|
||
|
|
});
|
||
|
|
|
||
|
|
readable.once("end", function() {
|
||
|
|
return self.push(null);
|
||
|
|
});
|
||
|
|
|
||
|
|
if (this._bubbleErrors) {
|
||
|
|
writable.on("error", function(err) {
|
||
|
|
return self.emit("error", err);
|
||
|
|
});
|
||
|
|
|
||
|
|
readable.on("error", function(err) {
|
||
|
|
return 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(n) {
|
||
|
|
this._readable.resume();
|
||
|
|
};
|