Bug in obfuscate js code.

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評估

難度
3/5
預估耗時
1-2 天
新手友好度
35/100
Issue 類型
缺陷
描述清晰度
基本清楚
活躍度
停滯
技術堆疊
javascript
領域
build-system, tooling

研究方向

未指定任何儲存庫檔案、測試、版本或設定。首先透過 gulp 混淆管線重現所提供的 Painter 範例，並比較為 this.prePaint、this.paint 和 this.postPaint 產生的參照。完成的標準是，混淆後的程式碼保留可呼叫的屬性參照，而不需要插入換行符號。

由索引模型根據 Issue 內容生成。

描述

bug cannot reproduce

First at all, sorry for my english, i will try to explain it as better as possible.

I have the following js code:

    export const Painter = function (elements, data) {
        let title = elements.title;
        let container = elements.container;
        this.prePaint = () => { };
        this.paint = () => { };
        this.postPaint = () => { };
        let finalPaint = () => {
            this.prePaint = () => { };
            this.paint = () => { };
            this.postPaint = () => { };
            createPromise();
        };

        let createPromise = () => {
            return new Promise((resolve, reject) => {
                this.paint = () => { resolve() }
            }).then(() => {
                this.prePaint(elements, data);
                title.innerHTML = data.title;
                container.innerHTML = data.html;
                this.postPaint(elements, data);
                finalPaint();
            });
        }

        createPromise();
    };

When i obfuscate this code, it seems like this (it was minimized and formatted by the browser):

5: [function(a, b, c) {
        "use strict";
        Object[_0x56ae("0x6")](c, _0x56ae("0x6e"), {
            value: !0
        });
        c[_0x56ae("0xb5")] = function(a, b) {
            var c = this
              , d = a[_0x56ae("0xb6")]
              , e = a[_0x56ae("0xb7")];
            this.prePaint = function() {}      //// THIS LINE
            ,
            this[_0x56ae("0xb8")] = function() {}
            ,
            this[_0x56ae("0xb9")] = function() {}
            ;
            var f = function() {
                c[_0x56ae("0xba")] = function() {}
                ,
                c.paint = function() {}         ///// THIS LINE TOO
                ,
                c.postPaint = function() {}       ///// AND THIS LINE TOO
                ,
                g()
            }
              , g = function() {
                return new Promise(function(a) {
                    c.paint = function() {
                        a()
                    }
                }
                )[_0x56ae("0x24")](function() {
                    c[_0x56ae("0xba")](a, b),
                    d.innerHTML = b[_0x56ae("0xb6")],
                    e.innerHTML = b[_0x56ae("0x34")],
                    c.postPaint(a, b),
                    f()
                })
            };
            g()
        }
    }
    , {}]

You can see, how the fisrt this.prePaint has not transformed to this[_0x56ae("0xba")] and when this is called, it said undefined function.
But if i insert breaklines between all this "problematic" lines, it work. Like this:


export const Painter = function (elements, data) {
    let title = elements.title;
    let container = elements.container;

    this.prePaint = () => { };

    this.paint = () => { };

    this.postPaint = () => { };

    let finalPaint = () => {

        this.prePaint = () => { };

        this.paint = () => { };

        this.postPaint = () => { };

        createPromise();
    };

    let createPromise = () => {
        return new Promise((resolve, reject) => {

            this.paint = () => { resolve() }

        }).then(() => {
            this.prePaint(elements, data);

            title.innerHTML = data.title;
            container.innerHTML = data.html;

            this.postPaint(elements, data);

            finalPaint();

        });
    }

    createPromise();
};

I did fix this issue with this partial solution, but i don't know where more places of my code, will appear the same issue.

Thank you

主要語言
JavaScript
星號
103
分支
37
30 天內沒有已合併 PR

環境準備

這個專案沒有提供開發容器、Dockerfile 或貢獻指南，環境需要你自己搭建：先看它的 README，通用步驟見我們的新手貢獻指南。

從這裡開始

  1. 先讀完整個 Issue，再讀專案的貢獻指南。
  2. 在 Issue 下留言說明你要接手 —— 這能避免兩個人做同樣的事。
  3. Fork 儲存庫，在一個分支上完成修改。
  4. 送出 Pull Request，並在描述裡引用這個 Issue 編號。

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