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