hulken/lib/util.js

Hulken is a stress testing tool for everything speaking HTTP. Hulken supports multiple urls, GETs and POSTs, static and dynamic payloads, multiple agents and more. Hulken is highly configurable but defaults to some reasonable settings. Hulken works both a

//  external deps
var fs = require('fs');
//  internal deps
var hulken = require('./hulken.js');
var printer = require('./printer.js');

exports.getRandomWaitTime = function() {
  var min = hulken.settings.minWaitTime;
  var max = hulken.settings.maxWaitTime;
  var randomWaitTime = Math.random() * (max - min) + min;
  return randomWaitTime;
};

exports.stringContainsChar = function(str, tokens) {
  for (var i = 0; i < str.length; i++) {
    for (var j = 0; j < tokens.length; j++) {
      if (str[i] === tokens[j]) {
        return true;
      }
    }
  }
  return false;
};

exports.stringIsInArray = function(strArray, str) {
  for (var i = 0; i < strArray.length; i++) {
    if (strArray[i] == str) {
      return true;
    }
  }
  return false;
};
exports.getRandomStringOfLetters = function(numberOfChars){
  var possibleChars = 'ABCDEFGHIJKLMNOPQRSTUVXYZabcdefghijklmnopqrstuvxyz';
  return getRandomValue(possibleChars, numberOfChars);
};
exports.getRandomStringOfNumbers = function(numberOfChars){
  var possibleChars = '0123456789';
  return getRandomValue(possibleChars, numberOfChars);
};
exports.getRandomStringOfLettersAndNumbers = function(numberOfChars){
  var possibleChars = 'ABCDEFGHIJKLMNOPQRSTUVXYZabcdefghijklmnopqrstuvxyz0123456789';
  return getRandomValue(possibleChars, numberOfChars);
};
function getRandomValue(possibleChars, numberOfChars){
  var valueToReturn = '';
  for(var i = 0; i < numberOfChars; i++){
    randomIndex = Math.floor(Math.random() * possibleChars.length);
    valueToReturn += possibleChars[randomIndex];
  }
  return valueToReturn;
}
exports.getRandomValueInArray = function(list){
  randomIndex = Math.floor(Math.random() * list.length);
  return list[randomIndex];
};
exports.getCloneOfObject = function(obj){
  return JSON.parse(JSON.stringify(obj));
};
exports.createExampleOptions = function() {
  var appUrl = process.argv[3];
  if (!appUrl) {
    printer.print('you have to provide the url!'.red.inverse);
  } else {
    var hulken_options = {
      targetUrl: appUrl,
      requestsFilePath: './hulkenRequestsFile.json',
      timesToRunEachRequest: 10,
      numberOfHulkenAgents: 10,
      happyTimeLimit: 10,
      slowRequestsTimeLimit: 0.5,
      angryOnFailedRequest: true,
      chatty: true,
      happyMessage: "HULKEN PLEASED, YOU MAY CONTINUE WITH YOUR DAY!",
      angryMessage: "HULKEN ANGRY! HULKEN SMASH!",
      minWaitTime: 500,
      maxWaitTime: 2000,
      tokensSkippingRequest: [':', '{', '}']
    };
    fs.writeFile('./options.json', JSON.stringify(
      hulken_options), function(err) {
      if (err) {
        printer.print(err.toString().red.inverse);
      } else {
        printer.print('\n an example options.json was created:'.green.inverse);
        printer.print('(please review the requestsFilePath)'.white.inverse +
          '\n');
        printer.print(JSON.stringify(hulken_options, null, 4) + '\n');
        printer.print(
          'see other settings you can override and their default values at:'.white
          .inverse);
        printer.print(
          'https://github.com/hellgrenj/hulken#settings'.white
          .inverse + '\n');
      }
    });
  }
};