lepu-test-platform-web/node_modules/handle-thing/lib/handle.js

264 lines
5.4 KiB
JavaScript

var assert = require('assert')
var util = require('util')
var EventEmitter = require('events').EventEmitter
var Buffer = require('buffer').Buffer
var Queue = require('./queue')
// Node.js version
var match = /^v(\d+)\.(\d+)\./.exec(process.version)
var version = match ? Number(match[1]) + Number('0.' + match[2]) : 11
var onreadMode = version >= 11.1 ? 2 : 1
var mode = 'modern'
var setNRead
if (onreadMode === 2) {
var sw = process.binding('stream_wrap')
setNRead = function (nread) {
sw.streamBaseState[sw.kReadBytesOrError] = nread
}
}
function Handle (stream, options) {
EventEmitter.call(this)
this._stream = stream
this._flowing = false
this._reading = false
this._options = options || {}
this.onread = null
// Pending requests
this.pending = new Queue()
}
util.inherits(Handle, EventEmitter)
module.exports = Handle
Handle.mode = mode
Handle.create = function create (stream, options) {
return new Handle(stream, options)
}
Handle.prototype._onread = function _onread (nread, buffer) {
if (onreadMode === 1) {
this.onread(nread, buffer)
} else {
setNRead(nread)
this.onread(buffer)
}
}
Handle.prototype._queueReq = function _queueReq (type, req) {
return this.pending.append(type, req)
}
Handle.prototype._pendingList = function _pendingList () {
var list = []
while (!this.pending.isEmpty()) { list.push(this.pending.first().dequeue()) }
return list
}
Handle.prototype.setStream = function setStream (stream) {
assert(this._stream === null, 'Can\'t set stream two times')
this._stream = stream
this.emit('stream', stream)
}
Handle.prototype.readStart = function readStart () {
this._reading = true
if (!this._stream) {
this.once('stream', this.readStart)
return 0
}
if (!this._flowing) {
this._flowing = true
this._flow()
}
this._stream.resume()
return 0
}
Handle.prototype.readStop = function readStop () {
this._reading = false
if (!this._stream) {
this.once('stream', this.readStop)
return 0
}
this._stream.pause()
return 0
}
var uv = process.binding('uv')
Handle.prototype._flow = function flow () {
var self = this
this._stream.on('data', function (chunk) {
self._onread(chunk.length, chunk)
})
this._stream.on('end', function () {
self._onread(uv.UV_EOF, Buffer.alloc(0))
})
this._stream.on('close', function () {
setImmediate(function () {
if (self._reading) {
self._onread(uv.UV_ECONNRESET, Buffer.alloc(0))
}
})
})
}
Handle.prototype._close = function _close () {
var list = this._pendingList()
var self = this
setImmediate(function () {
for (var i = 0; i < list.length; i++) {
var req = list[i]
req.oncomplete(uv.UV_ECANCELED, self, req)
}
})
this.readStop()
}
Handle.prototype.shutdown = function shutdown (req) {
var wrap = this._queueReq('shutdown', req)
if (!this._stream) {
this.once('stream', function () {
this._shutdown(wrap)
})
return 0
}
return this._shutdown(wrap)
}
Handle.prototype._shutdown = function _shutdown (wrap) {
var self = this
this._stream.end(function () {
var req = wrap.dequeue()
if (!req) { return }
req.oncomplete(0, self, req)
})
return 0
}
Handle.prototype.close = function close (callback) {
this._close()
if (!this._stream) {
this.once('stream', function () {
this.close(callback)
})
return 0
}
if (this._options.close) {
this._options.close(callback)
} else {
process.nextTick(callback)
}
return 0
}
Handle.prototype.writeEnc = function writeEnc (req, data, enc) {
var wrap = this._queueReq('write', req)
if (!this._stream) {
this.once('stream', function () {
this._writeEnc(wrap, req, data, enc)
})
return 0
}
return this._writeEnc(wrap, req, data, enc)
}
Handle.prototype._writeEnc = function _writeEnc (wrap, req, data, enc) {
var self = this
req.async = true
req.bytes = data.length
if (wrap.isEmpty()) {
return 0
}
this._stream.write(data, enc, function () {
var req = wrap.dequeue()
if (!req) { return }
req.oncomplete(0, self, req)
})
return 0
}
/**
* @param {WriteWrap} req
* @param {string[]} chunks
* @param {Boolean} allBuffers
*/
Handle.prototype.writev = function _writev (req, chunks, allBuffers) {
while (chunks.length > 0) {
this._stream.write(chunks.shift(), chunks.shift())
}
return 0
}
Handle.prototype.writeBuffer = function writeBuffer (req, data) {
return this.writeEnc(req, data, null)
}
Handle.prototype.writeAsciiString = function writeAsciiString (req, data) {
return this.writeEnc(req, data, 'ascii')
}
Handle.prototype.writeUtf8String = function writeUtf8String (req, data) {
return this.writeEnc(req, data, 'utf8')
}
Handle.prototype.writeUcs2String = function writeUcs2String (req, data) {
return this.writeEnc(req, data, 'ucs2')
}
Handle.prototype.writeBinaryString = function writeBinaryString (req, data) {
return this.writeEnc(req, data, 'binary')
}
Handle.prototype.writeLatin1String = function writeLatin1String (req, data) {
return this.writeEnc(req, data, 'binary')
}
// v0.8
Handle.prototype.getsockname = function getsockname () {
if (this._options.getPeerName) {
return this._options.getPeerName()
}
return null
}
Handle.prototype.getpeername = function getpeername (out) {
var res = this.getsockname()
if (!res) { return -1 }
Object.keys(res).forEach(function (key) {
out[key] = res[key]
})
return 0
}