119 lines
2.6 KiB
JavaScript
119 lines
2.6 KiB
JavaScript
var Stream = require('stream').Stream
|
|
|
|
module.exports = legacy
|
|
|
|
function legacy (fs) {
|
|
return {
|
|
ReadStream: ReadStream,
|
|
WriteStream: WriteStream
|
|
}
|
|
|
|
function ReadStream (path, options) {
|
|
if (!(this instanceof ReadStream)) return new ReadStream(path, options);
|
|
|
|
Stream.call(this);
|
|
|
|
var self = this;
|
|
|
|
this.path = path;
|
|
this.fd = null;
|
|
this.readable = true;
|
|
this.paused = false;
|
|
|
|
this.flags = 'r';
|
|
this.mode = 438; /*=0666*/
|
|
this.bufferSize = 64 * 1024;
|
|
|
|
options = options || {};
|
|
|
|
// Mixin options into this
|
|
var keys = Object.keys(options);
|
|
for (var index = 0, length = keys.length; index < length; index++) {
|
|
var key = keys[index];
|
|
this[key] = options[key];
|
|
}
|
|
|
|
if (this.encoding) this.setEncoding(this.encoding);
|
|
|
|
if (this.start !== undefined) {
|
|
if ('number' !== typeof this.start) {
|
|
throw TypeError('start must be a Number');
|
|
}
|
|
if (this.end === undefined) {
|
|
this.end = Infinity;
|
|
} else if ('number' !== typeof this.end) {
|
|
throw TypeError('end must be a Number');
|
|
}
|
|
|
|
if (this.start > this.end) {
|
|
throw new Error('start must be <= end');
|
|
}
|
|
|
|
this.pos = this.start;
|
|
}
|
|
|
|
if (this.fd !== null) {
|
|
process.nextTick(function() {
|
|
self._read();
|
|
});
|
|
return;
|
|
}
|
|
|
|
fs.open(this.path, this.flags, this.mode, function (err, fd) {
|
|
if (err) {
|
|
self.emit('error', err);
|
|
self.readable = false;
|
|
return;
|
|
}
|
|
|
|
self.fd = fd;
|
|
self.emit('open', fd);
|
|
self._read();
|
|
})
|
|
}
|
|
|
|
function WriteStream (path, options) {
|
|
if (!(this instanceof WriteStream)) return new WriteStream(path, options);
|
|
|
|
Stream.call(this);
|
|
|
|
this.path = path;
|
|
this.fd = null;
|
|
this.writable = true;
|
|
|
|
this.flags = 'w';
|
|
this.encoding = 'binary';
|
|
this.mode = 438; /*=0666*/
|
|
this.bytesWritten = 0;
|
|
|
|
options = options || {};
|
|
|
|
// Mixin options into this
|
|
var keys = Object.keys(options);
|
|
for (var index = 0, length = keys.length; index < length; index++) {
|
|
var key = keys[index];
|
|
this[key] = options[key];
|
|
}
|
|
|
|
if (this.start !== undefined) {
|
|
if ('number' !== typeof this.start) {
|
|
throw TypeError('start must be a Number');
|
|
}
|
|
if (this.start < 0) {
|
|
throw new Error('start must be >= zero');
|
|
}
|
|
|
|
this.pos = this.start;
|
|
}
|
|
|
|
this.busy = false;
|
|
this._queue = [];
|
|
|
|
if (this.fd === null) {
|
|
this._open = fs.open;
|
|
this._queue.push([this._open, this.path, this.flags, this.mode, undefined]);
|
|
this.flush();
|
|
}
|
|
}
|
|
}
|