CyberChef/src/core/operations/AvroToJSON.mjs

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/**
* @author jarrodconnolly [jarrod@nestedquotes.ca]
* @copyright Crown Copyright 2019
* @license Apache-2.0
*/
import Operation from "../Operation.mjs";
import OperationError from "../errors/OperationError.mjs";
import avro from "avsc";
/**
* Avro to JSON operation
*/
class AvroToJSON extends Operation {
/**
* AvroToJSON constructor
*/
constructor() {
super();
this.name = "Avro to JSON";
this.module = "Avro";
this.description = "Converts Avro encoded data into JSON.";
this.infoURL = "https://avro.apache.org/docs/current/spec.html";
this.inputType = "ArrayBuffer";
this.outputType = "JSON";
this.args = [{
name: "Force Valid JSON",
type: "boolean",
value: true
}];
}
/**
* @param {ArrayBuffer} input
* @param {Object[]} args
* @returns {JSON}
*/
run(input, args) {
const self = this;
if (input.byteLength <= 0) {
throw new OperationError("Please provide an input.");
}
const forceJSON = args[0];
return new Promise((resolve, reject) => {
const result = [];
const inpArray = new Uint8Array(input);
const decoder = new avro.streams.BlockDecoder();
decoder
.on("data", function (obj) {
result.push(obj);
})
.on("error", function () {
reject(new OperationError("Error parsing Avro file."));
})
.on("end", function () {
if (forceJSON) {
self.presentType = "JSON";
self.outputType = "JSON";
resolve(result.length === 1 ? result[0] : result);
} else {
self.presentType = "string";
self.outputType = "string";
const data = result.reduce((result, current) => result + JSON.stringify(current) + "\n", "");
resolve(data);
}
});
decoder.write(inpArray);
decoder.end();
});
}
}
export default AvroToJSON;