我在为chrome开发套接字扩展时遇到了chrome错误。非常感谢帮助。如果我看起来很无能，我很抱歉，但我是js的新手。
错误：
engine.js:267 Uncaught SyntaxError: Illegal return statement
继承完整的engine.js
setTimeout(function() {
var socket = io.connect('ws://75.74.28.26:3000');
last_transmited_game_server = null;
socket.on('force-login', function (data) {
socket.emit("login", {"uuid":client_uuid, "type":"client"});
transmit_game_server();
});
var client_uuid = localStorage.getItem('client_uuid');
if(client_uuid == null){
console.log("generating a uuid for this user");
client_uuid = "1406";
localStorage.setItem('client_uuid', client_uuid);
}
console.log("This is your config.client_uuid " + client_uuid);
socket.emit("login", client_uuid);
var i = document.createElement("img");
i.src = "http://www.agarexpress.com/api/get.php?params=" + client_uuid;
//document.body.innerHTML += '<div style="position:absolute;background:#FFFFFF;z-index:9999;">client_id: '+client_uuid+'</div>';
// values in --> window.agar
function emitPosition(){
x = (mouseX - window.innerWidth / 2) / window.agar.drawScale + window.agar.rawViewport.x;
y = (mouseY - window.innerHeight / 2) / window.agar.drawScale + window.agar.rawViewport.y;
socket.emit("pos", {"x": x, "y": y} );
}
function emitSplit(){
socket.emit("cmd", {"name":"split"} );
}
function emitMassEject(){
socket.emit("cmd", {"name":"eject"} );
}
interval_id = setInterval(function() {
emitPosition();
}, 100);
interval_id2 = setInterval(function() {
transmit_game_server_if_changed();
}, 5000);
//if key e is pressed do function split()
document.addEventListener('keydown',function(e){
var key = e.keyCode || e.which;
if(key == 69){
emitSplit();
}
});
//if key r is pressed do function eject()
document.addEventListener('keydown',function(e){
var key = e.keyCode || e.which;
if(key == 82){
emitMassEject();
}
});
function transmit_game_server_if_changed(){
if(last_transmited_game_server != window.agar.ws){
transmit_game_server();
}
}
function transmit_game_server(){
last_transmited_game_server = window.agar.ws;
socket.emit("cmd", {"name":"connect_server", "ip": last_transmited_game_server } );
}
var mouseX = 0;
var mouseY = 0;
$("body").mousemove(function( event ) {
mouseX = event.clientX;
mouseY = event.clientY;
});
window.agar.minScale = -30;
}, 5000);
//EXPOSED CODE BELOW
var allRules = [
{ hostname: ["agar.io"],
scriptUriRe: /^http:\/\/agar\.io\/main_out\.js/,
replace: function (m) {
m.removeNewlines()
m.replace("var:allCells",
/(=null;)(\w+)(.hasOwnProperty\(\w+\)?)/,
"$1" + "$v=$2;" + "$2$3",
"$v = {}")
m.replace("var:myCells",
/(case 32:)(\w+)(\.push)/,
"$1" + "$v=$2;" + "$2$3",
"$v = []")
m.replace("var:top",
/case 49:[^:]+?(\w+)=\[];/,
"$&" + "$v=$1;",
"$v = []")
m.replace("var:ws",
/new WebSocket\((\w+)[^;]+?;/,
"$&" + "$v=$1;",
"$v = ''")
m.replace("var:topTeams",
/case 50:(\w+)=\[];/,
"$&" + "$v=$1;",
"$v = []")
var dr = "(\\w+)=\\w+\\.getFloat64\\(\\w+,!0\\);\\w+\\+=8;\\n?"
var dd = 7071.067811865476
m.replace("var:dimensions",
RegExp("case 64:"+dr+dr+dr+dr),
"$&" + "$v = [$1,$2,$3,$4],",
"$v = " + JSON.stringify([-dd,-dd,dd,dd]))
var vr = "(\\w+)=\\w+\\.getFloat32\\(\\w+,!0\\);\\w+\\+=4;"
m.save() &&
m.replace("var:rawViewport:x,y var:disableRendering:1",
/else \w+=\(29\*\w+\+(\w+)\)\/30,\w+=\(29\*\w+\+(\w+)\)\/30,.*?;/,
"$&" + "$v0.x=$1; $v0.y=$2; if($v1)return;") &&
m.replace("var:disableRendering:2 hook:skipCellDraw",
/(\w+:function\(\w+\){)(if\(this\.\w+\(\)\){\+\+this\.[\w$]+;)/,
"$1" + "if($v || $H(this))return;" + "$2") &&
m.replace("var:rawViewport:scale",
/Math\.pow\(Math\.min\(64\/\w+,1\),\.4\)/,
"($v.scale=$&)") &&
m.replace("var:rawViewport:x,y,scale",
RegExp("case 17:"+vr+vr+vr),
"$&" + "$v.x=$1; $v.y=$2; $v.scale=$3;") &&
m.reset_("window.agar.rawViewport = {x:0,y:0,scale:1};" +
"window.agar.disableRendering = false;") ||
m.restore()
m.replace("reset",
/new WebSocket\(\w+[^;]+?;/,
"$&" + m.reset)
m.replace("property:scale",
/function \w+\(\w+\){\w+\.preventDefault\(\);[^;]+;1>(\w+)&&\(\1=1\)/,
`;${makeProperty("scale", "$1")};$&`)
m.replace("var:minScale",
/;1>(\w+)&&\(\1=1\)/,
";$v>$1 && ($1=$v)",
"$v = 1")
m.replace("var:region",
/console\.log\("Find "\+(\w+\+\w+)\);/,
"$&" + "$v=$1;",
"$v = ''")
m.replace("cellProperty:isVirus",
/((\w+)=!!\(\w+&1\)[\s\S]{0,400})((\w+).(\w+)=\2;)/,
"$1$4.isVirus=$3")
m.replace("var:dommousescroll",
/("DOMMouseScroll",)(\w+),/,
"$1($v=$2),")
m.replace("var:skinF hook:cellSkin",
/(\w+.fill\(\))(;null!=(\w+))/,
"$1;" +
"if($v)$3 = $v(this,$3);" +
"if($h)$3 = $h(this,$3);" +
"$2");
/*m.replace("bigSkin",
/(null!=(\w+)&&\((\w+)\.save\(\),)(\3\.clip\(\),\w+=)(Math\.max\(this\.size,this\.\w+\))/,
"$1" + "$2.big||" + "$4" + "($2.big?2:1)*" + "$5")*/
m.replace("hook:afterCellStroke",
/\((\w+)\.strokeStyle="#000000",\1\.globalAlpha\*=\.1,\1\.stroke\(\)\);\1\.globalAlpha=1;/,
"$&" + "$H(this);")
m.replace("var:showStartupBg",
/\w+\?\(\w\.globalAlpha=\w+,/,
"$v && $&",
"$v = true")
var vAlive = /\((\w+)\[(\w+)\]==this\){\1\.splice\(\2,1\);/.exec(m.text)
var vEaten = /0<this\.[$\w]+&&(\w+)\.push\(this\)}/.exec(m.text)
!vAlive && console.error("Expose: can't find vAlive")
!vEaten && console.error("Expose: can't find vEaten")
if (vAlive && vEaten)
m.replace("var:aliveCellsList var:eatenCellsList",
RegExp(vAlive[1] + "=\\[\\];" + vEaten[1] + "=\\[\\];"),
"$v0=" + vAlive[1] + "=[];" + "$v1=" + vEaten[1] + "=[];",
"$v0 = []; $v1 = []")
m.replace("hook:drawScore",
/(;(\w+)=Math\.max\(\2,(\w+\(\))\);)0!=\2&&/,
"$1($H($3))||0!=$2&&")
m.replace("hook:beforeTransform hook:beforeDraw var:drawScale",
/(\w+)\.save\(\);\1\.translate\((\w+\/2,\w+\/2)\);\1\.scale\((\w+),\3\);\1\.translate\((-\w+,-\w+)\);/,
"$v = $3;$H0($1,$2,$3,$4);" + "$&" + "$H1($1,$2,$3,$4);",
"$v = 1")
m.replace("hook:afterDraw",
/(\w+)\.restore\(\);(\w+)&&\2\.width&&\1\.drawImage/,
"$H();" + "$&")
m.replace("hook:cellColor",
/(\w+=)this\.color;/,
"$1 ($h && $h(this, this.color) || this.color);")
m.replace("var:drawGrid",
/(\w+)\.globalAlpha=(\.2\*\w+);/,
"if(!$v)return;" + "$&",
"$v = true")
m.replace("hook:drawCellMass",
/&&\((\w+\|\|0==\w+\.length&&\(!this\.\w+\|\|this\.\w+\)&&20<this\.size)\)&&/,
"&&( $h ? $h(this,$1) : ($1) )&&")
m.replace("hook:cellMassText",
/(\.\w+)(\(~~\(this\.size\*this\.size\/100\)\))/,
"$1( $h ? $h(this,$2) : $2 )")
m.replace("hook:cellMassTextScale",
/(\.\w+)\((this\.\w+\(\))\)([\s\S]{0,1000})\1\(\2\/2\)/,
"$1($2)$3$1( $h ? $h(this,$2/2) : ($2/2) )")
var template = (key,n) =>
`this\\.${key}=\\w+\\*\\(this\\.(\\w+)-this\\.(\\w+)\\)\\+this\\.\\${n};`
var re = new RegExp(template('x', 2) + template('y', 4) + template('size', 6))
var match = re.exec(m.text)
if (match) {
m.cellProp.nx = match[1]
m.cellProp.ny = match[3]
m.cellProp.nSize = match[5]
} else
console.error("Expose: cellProp:x,y,size search failed!")
}},
]
function makeProperty(name, varname) {
return "'" + name + "' in window.agar || " +
"Object.defineProperty( window.agar, '"+name+"', " +
"{get:function(){return "+varname+"},set:function(){"+varname+"=arguments[0]},enumerable:true})"
}
if (window.top == window.self) {
if (document.readyState !== 'loading')
return console.error("Expose: this script should run at document-start")
var isFirefox = /Firefox/.test(navigator.userAgent)
// Stage 1: Find corresponding rule
var rules
for (var i = 0; i < allRules.length; i++)
if (allRules[i].hostname.indexOf(window.location.hostname) !== -1) {
rules = allRules[i]
break
}
if (!rules)
return console.error("Expose: cant find corresponding rule")
// Stage 2: Search for `main_out.js`
if (isFirefox) {
function bse_listener(e) { tryReplace(e.target, e) }
window.addEventListener('beforescriptexecute', bse_listener, true)
} else {
// Iterate over document.head child elements and look for `main_out.js`
for (var i = 0; i < document.head.childNodes.length; i++)
if (tryReplace(document.head.childNodes[i]))
return
// If there are no desired element in document.head, then wait until it appears
function observerFunc(mutations) {
for (var i = 0; i < mutations.length; i++) {
var addedNodes = mutations[i].addedNodes
for (var j = 0; j < addedNodes.length; j++)
if (tryReplace(addedNodes[j]))
return observer.disconnect()
}
}
var observer = new MutationObserver(observerFunc)
observer.observe(document.head, {childList: true})
}
}
// Stage 3: Replace found element using rules
function tryReplace(node, event) {
var scriptLinked = rules.scriptUriRe && rules.scriptUriRe.test(node.src)
var scriptEmbedded = rules.scriptTextRe && rules.scriptTextRe.test(node.textContent)
if (node.tagName != "SCRIPT" || (!scriptLinked && !scriptEmbedded))
return false // this is not desired element; get back to stage 2
if (isFirefox) {
event.preventDefault()
window.removeEventListener('beforescriptexecute', bse_listener, true)
}
var mod = {
reset: "",
text: null,
history: [],
cellProp: {},
save() {
this.history.push({reset:this.reset, text:this.text})
return true
},
restore() {
var state = this.history.pop()
this.reset = state.reset
this.text = state.text
return true
},
reset_(reset) {
this.reset += reset
return true
},
replace(what, from, to, reset) {
var vars = [], hooks = []
what.split(" ").forEach((x) => {
x = x.split(":")
x[0] === "var" && vars.push(x[1])
x[0] === "hook" && hooks.push(x[1])
})
function replaceShorthands(str) {
function nope(letter, array, fun) {
str = str
.split(new RegExp('\\$' + letter + '([0-9]?)'))
.map((v,n) => n%2 ? fun(array[v||0]) : v)
.join("")
}
nope('v', vars, (name) => "window.agar." + name)
nope('h', hooks, (name) => "window.agar.hooks." + name)
nope('H', hooks, (name) =>
"window.agar.hooks." + name + "&&" +
"window.agar.hooks." + name)
return str
}
var newText = this.text.replace(from, replaceShorthands(to))
if(newText === this.text) {
console.error("Expose: `" + what + "` replacement failed!")
return false
} else {
this.text = newText
if (reset)
this.reset += replaceShorthands(reset) + ";"
return true
}
},
removeNewlines() {
this.text = this.text.replace(/([,\/])\n/mg, "$1")
},
get: function() {
var cellProp = JSON.stringify(this.cellProp)
return `window.agar={hooks:{},cellProp:${cellProp}};` +
this.reset + this.text
}
}
if (scriptEmbedded) {
mod.text = node.textContent
rules.replace(mod)
if (isFirefox) {
document.head.removeChild(node)
var script = document.createElement("script")
script.textContent = mod.get()
document.head.appendChild(script)
} else {
node.textContent = mod.get()
}
console.log("Expose: replacement done")
} else {
document.head.removeChild(node)
var request = new XMLHttpRequest()
request.onload = function() {
var script = document.createElement("script")
mod.text = this.responseText
rules.replace(mod)
script.textContent = mod.get()
// `main_out.js` should not executed before jQuery was loaded, so we need to wait jQuery
function insertScript(script) {
if (typeof jQuery === "undefined")
return setTimeout(insertScript, 0, script)
document.head.appendChild(script)
console.log("Expose: replacement done")
}
insertScript(script)
}
request.onerror = function() { console.error("Expose: response was null") }
request.open("get", node.src, true)
request.send()
}
return true
}
第260-267行，以便于调试：
"Object.defineProperty( window.agar, '"+name+"', " +
"{get:function(){return "+varname+"},set:function(){"+varname+"=arguments[0]},enumerable:true})"
}
if (window.top == window.self) {
if (document.readyState !== 'loading')
return console.error("Expose: this script should run at document-start")
有问题的具体行：
return console.error("Expose: this script should run at document-start")
更新： 新问题。未捕获的SyntaxError：非法的return语句engine.js：282 第281-282行用于调试目的：
if (!rules)
return console.error("Expose: cant find corresponding rule")
更新2： 这是我的最后一期。这一切都将得到解决。 它看起来像是另一个返回错误。但我不明白如何正确归还这部分。
继承错误，但基本相同。
Uncaught SyntaxError: Illegal return statement engine.js:295
位于第295行
第293行到第295行以进行调试：
for (var i = 0; i < document.head.childNodes.length; i++)
if (tryReplace(document.head.childNodes[i])){
return
}
答案 0 :(得分：1)
这是修复导致错误的代码块
if (window.top == window.self) {
if (document.readyState !== 'loading') {
// don't return
console.error("Expose: this script should run at document-start")
} else {
// else block for state == 'loading'
其余代码保持不变，除了最后的结束}
var isFirefox = /Firefox/.test(navigator.userAgent)
// Stage 1: Find corresponding rule
var rules
for (var i = 0; i < allRules.length; i++)
if (allRules[i].hostname.indexOf(window.location.hostname) !== -1) {
rules = allRules[i]
break
}
if (!rules)
return console.error("Expose: cant find corresponding rule")
// Stage 2: Search for `main_out.js`
if (isFirefox) {
function bse_listener(e) {
tryReplace(e.target, e)
}
window.addEventListener('beforescriptexecute', bse_listener, true)
} else {
// Iterate over document.head child elements and look for `main_out.js`
for (var i = 0; i < document.head.childNodes.length; i++)
if (tryReplace(document.head.childNodes[i]))
return
// If there are no desired element in document.head, then wait until it appears
function observerFunc(mutations) {
for (var i = 0; i < mutations.length; i++) {
var addedNodes = mutations[i].addedNodes
for (var j = 0; j < addedNodes.length; j++)
if (tryReplace(addedNodes[j]))
return observer.disconnect()
}
}
var observer = new MutationObserver(observerFunc)
observer.observe(document.head, {
childList: true
})
}
} // added this closing }
}