A quick method which generates a base64 hash string for a given object for the purpose of caching the API response in redis when the request parameters match.

hashing.js

function isObject(obj) {
  return typeof obj==='object' && !Array.isArray(obj) && obj !== null;
}


// object -> array
function paramStrGen(obj){
  var finalKey = [];
Object.keys(obj).sort().forEach(key => {
  var val = obj[key];
  var fval = Array.isArray(val) ? val.sort().join() : val;
  finalKey.push(`${key}:${fval}`);
});
return finalKey;
}

// nested object -> array
function paramStrGenV2(obj,rootKey){
  var finalKey = [];
Object.keys(obj).sort().forEach(key => {
  var fkey = rootKey === null ? key :  `${rootKey}.${key}`;
  var val = obj[key];
  if(isObject(val)){
    // recursion to generate the array for inner objects.
    finalKey = finalKey.concat(paramStrGenV2(val,fkey));
  }else{
    var fval = Array.isArray(val) ? val.sort().join() : val;
    finalKey.push(`${fkey}:${fval}`);  
  }
});
return finalKey;
}


var crypto = require('node:crypto');
var ipobj = {x:1, y:true,a:["c","b","a"],n1:{x1:true,y:["z","c"],n2:{hello:"world",a3:{nested: true}}}};
var result = paramStrGenV2(ipobj,null);

console.log('Final array', result);

console.log(crypto.createHash('sha1').update(result.join()).digest('base64'))