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JavaScriptObfuscatorInternal.ts
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113 lines (94 loc) · 3.04 KB
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import * as esprima from 'esprima';
import * as escodegen from 'escodegen';
import { IObfuscatorOptions } from "./interfaces/IObfuscatorOptions";
import { IGeneratorOutput } from "./interfaces/IGeneratorOutput";
import { INode } from './interfaces/nodes/INode';
import { IObfuscationResult } from "./interfaces/IObfuscationResult";
import { IOptions } from './interfaces/IOptions';
import { ObfuscationResult } from "./ObfuscationResult";
import { Obfuscator } from "./Obfuscator";
import { Options } from "./Options";
import { SourceMapCorrector } from "./SourceMapCorrector";
export class JavaScriptObfuscatorInternal {
/**
* @type {GenerateOptions}
*/
private static escodegenParams: escodegen.GenerateOptions = {
verbatim: 'x-verbatim-property',
sourceMapWithCode: true
};
/**
* @type {IGeneratorOutput}
*/
private generatorOutput: IGeneratorOutput;
/**
* @type {IOptions}
*/
private options: IOptions;
/**
* @type {string}
*/
private sourceCode: string;
/**
* @type {string}
*/
private sourceMapUrl: string = '';
/**
* @param sourceCode
* @param obfuscatorOptions
*/
constructor (sourceCode: string, obfuscatorOptions?: IObfuscatorOptions) {
this.sourceCode = sourceCode;
if (obfuscatorOptions) {
this.options = new Options(obfuscatorOptions);
}
}
/**
* @param sourceCode
* @param astTree
* @param options
*/
private static generateCode (sourceCode: string, astTree: INode, options: IOptions): IGeneratorOutput {
let escodegenParams: escodegen.GenerateOptions = Object.assign(
{},
JavaScriptObfuscatorInternal.escodegenParams
),
generatorOutput: IGeneratorOutput;
if (options.sourceMap) {
escodegenParams.sourceMap = 'sourceMap';
escodegenParams.sourceContent = sourceCode;
}
escodegenParams.format = {
compact: options.compact
};
generatorOutput = escodegen.generate(astTree, escodegenParams);
generatorOutput.map = generatorOutput.map ? generatorOutput.map.toString() : '';
return generatorOutput;
}
/**
* @returns {IObfuscationResult}
*/
public getObfuscationResult (): IObfuscationResult {
return new SourceMapCorrector(
new ObfuscationResult(
this.generatorOutput.code,
this.generatorOutput.map
),
this.sourceMapUrl,
this.options.sourceMapMode
).correct();
}
public obfuscate (): void {
let astTree: INode = esprima.parse(this.sourceCode, {
loc: true
});
astTree = new Obfuscator(this.options).obfuscateNode(astTree);
this.generatorOutput = JavaScriptObfuscatorInternal.generateCode(this.sourceCode, astTree, this.options);
}
/**
* @param url
*/
public setSourceMapUrl (url: string): void {
this.sourceMapUrl = url;
}
}