websocket 扩展
此腳本不應該直接安裝，它是一個供其他腳本使用的函式庫。欲使用本函式庫，請在腳本 metadata 寫上： // @require https://update.gf.qytechs.cn/scripts/460824/1154735/wsHookjs.js
/* eslint-disable no-proto */
/* eslint-disable accessor-pairs */
/* eslint-disable no-global-assign */
/* wsHook.js
* https://github.com/skepticfx/wshook
* Reference: http://www.w3.org/TR/2011/WD-websockets-20110419/#websocket
*/
var wsHook = {};
(function () {
// Mutable MessageEvent.
// Subclasses MessageEvent and makes data, origin and other MessageEvent properites mutatble.
function MutableMessageEvent (o) {
this.bubbles = o.bubbles || false
this.cancelBubble = o.cancelBubble || false
this.cancelable = o.cancelable || false
this.currentTarget = o.currentTarget || null
this.data = o.data || null
this.defaultPrevented = o.defaultPrevented || false
this.eventPhase = o.eventPhase || 0
this.lastEventId = o.lastEventId || ''
this.origin = o.origin || ''
this.path = o.path || new Array(0)
this.ports = o.parts || new Array(0)
this.returnValue = o.returnValue || true
this.source = o.source || null
this.srcElement = o.srcElement || null
this.target = o.target || null
this.timeStamp = o.timeStamp || null
this.type = o.type || 'message'
this.__proto__ = o.__proto__ || MessageEvent.__proto__
}
var before = wsHook.before = function (data, url, wsObject) {
return data
}
var after = wsHook.after = function (e, url, wsObject) {
return e
}
var modifyUrl = wsHook.modifyUrl = function(url) {
return url
}
wsHook.resetHooks = function () {
wsHook.before = before
wsHook.after = after
wsHook.modifyUrl = modifyUrl
}
var _WS = WebSocket
WebSocket = function (url, protocols) {
var WSObject
url = wsHook.modifyUrl(url) || url
this.url = url
this.protocols = protocols
if (!this.protocols) { WSObject = new _WS(url) } else { WSObject = new _WS(url, protocols) }
var _send = WSObject.send
WSObject.send = function (data) {
arguments[0] = wsHook.before(data, WSObject.url, WSObject) || data
_send.apply(this, arguments)
}
// Events needs to be proxied and bubbled down.
WSObject._addEventListener = WSObject.addEventListener
WSObject.addEventListener = function () {
var eventThis = this
// if eventName is 'message'
if (arguments[0] === 'message') {
arguments[1] = (function (userFunc) {
return function instrumentAddEventListener () {
arguments[0] = wsHook.after(new MutableMessageEvent(arguments[0]), WSObject.url, WSObject)
if (arguments[0] === null) return
userFunc.apply(eventThis, arguments)
}
})(arguments[1])
}
return WSObject._addEventListener.apply(this, arguments)
}
Object.defineProperty(WSObject, 'onmessage', {
'set': function () {
var eventThis = this
var userFunc = arguments[0]
var onMessageHandler = function () {
arguments[0] = wsHook.after(new MutableMessageEvent(arguments[0]), WSObject.url, WSObject)
if (arguments[0] === null) return
userFunc.apply(eventThis, arguments)
}
WSObject._addEventListener.apply(this, ['message', onMessageHandler, false])
}
})
return WSObject
}
})();