Расширение Chrome Неверное заявление о возврате

Question

У меня возникла ошибка хром при разработке расширения сокета для хром. Помощь будет принята с благодарностью. Прошу прощения, если я кажусь невежественным, но я новичок в js.

Ошибка:

engine.js:267 Uncaught SyntaxError: Illegal return statement 

Heres полный 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 
} 

Линия 260-267 для облегчения целей отладки:

"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") 

Конкретных линий, имеющие проблемы:

return console.error("Expose: this script should run at document-start") 

UPDATE: новый выпуск. Uncaught SyntaxError: Незаконное возвращение заявление engine.js: 282 Линия 281-282 для целей отладки:

if (!rules) 
    return console.error("Expose: cant find corresponding rule") 

UPDATE 2: Это мой последний вопрос. И все это будет разрешено. Похоже на другую ошибку возврата. Но я не понимаю, как правильно вернуть эту часть.

Это ошибка, но в основном такая же.

Uncaught SyntaxError: Illegal return statement engine.js:295 

расположен на линии 295

линии 293 к линейному 295 для целей отладки:

for (var i = 0; i < document.head.childNodes.length; i++) 
      if (tryReplace(document.head.childNodes[i])){ 
       return 
       } 

Answer 1

вот исправление для блока кода, который вызывает ошибку

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' 

Остальная часть кода не изменяется, за исключением закрытия} в конце

 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 } 
}