mirror of https://github.com/gchq/CyberChef.git
52 lines
1.5 KiB
JavaScript
52 lines
1.5 KiB
JavaScript
/**
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* @author sevzero [sevzero@protonmail.com]
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* @copyright Crown Copyright 2018
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* @license Apache-2.0
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*/
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import Operation from "../Operation";
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/**
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* Dechunk HTTP response operation
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*/
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class DechunkHTTPResponse extends Operation {
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/**
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* DechunkHTTPResponse constructor
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*/
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constructor() {
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super();
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this.name = "Dechunk HTTP response";
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this.module = "Default";
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this.description = "Parses an HTTP response transferred using Transfer-Encoding: Chunked";
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this.infoURL = "https://wikipedia.org/wiki/Chunked_transfer_encoding";
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this.inputType = "string";
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this.outputType = "string";
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this.args = [];
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}
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/**
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* @param {string} input
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* @param {Object[]} args
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* @returns {string}
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*/
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run(input, args) {
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const chunks = [];
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let chunkSizeEnd = input.indexOf("\n") + 1;
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const lineEndings = input.charAt(chunkSizeEnd - 2) === "\r" ? "\r\n" : "\n";
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const lineEndingsLength = lineEndings.length;
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let chunkSize = parseInt(input.slice(0, chunkSizeEnd), 16);
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while (!isNaN(chunkSize)) {
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chunks.push(input.slice(chunkSizeEnd, chunkSize + chunkSizeEnd));
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input = input.slice(chunkSizeEnd + chunkSize + lineEndingsLength);
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chunkSizeEnd = input.indexOf(lineEndings) + lineEndingsLength;
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chunkSize = parseInt(input.slice(0, chunkSizeEnd), 16);
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}
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return chunks.join("") + input;
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}
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}
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export default DechunkHTTPResponse;
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