k6 脚本:如何解析文件信息以在 HTTP 查询中使用

k6 script: How to parse file info to use in HTTP query

我是 k6 的新手,也是 JS 的新手。我正在尝试从我从数据库中的列导出的平面文件中读取列表。我想打开此文件并循环遍历列表,将每个项目附加为我的 HTTP 调用的查询参数。我不知道如何继续。

举个例子,如果这是我的文件:

employees.txt

01111
02222
06666
04444
09999

& 这是我的 k6 脚本 (perf-employee.js)

import http from "k6/http";
import { sleep } from "k6";

export let options = {
  vus: 3,
  duration: "5s" 
};

var data = {some type of parsing her?}.open("./employees.txt");

export default function() {
  http.get("http://www.example.com/employee?employee_num={number-here}“);
  sleep(1);
};

任何关于前进方向的指导将不胜感激。

open() returns 一个简单的字符串(如果使用 b 标志,则为二进制),因此您可以通过将其转换为数组来解析它(每一行它自己的数组行)与 JavaScript String.split() 方法。或者如果你想读取一个更复杂的数据文件,使用 JSON 和 JSON.parse() 方法将它直接转换成一个 JavaScript 对象——看一下 [=27] 中的第一个例子=] 以上。

然后通过使用 k6 的 execution context variables 你可以这样做:

import http from "k6/http";
import { sleep } from "k6";

var data = open("./employees.txt").split(/\r?\n/);

export let options = {
    vus: 3,
    duration: "5s"
};


export default function () {
    var employee = data[__ITER % data.length];
    console.log(`VU ${__VU} on iteration ${__ITER} has employee ID ${employee}...`)
    http.get(`http://www.example.com/employee?employee_num=${employee}`);
    sleep(1);
};

您应该在脚本输出中看到类似这样的内容:

INFO[0001] VU 2 on iteration 0 has employee ID 01111... 
INFO[0001] VU 1 on iteration 0 has employee ID 01111... 
INFO[0001] VU 3 on iteration 0 has employee ID 01111... 
INFO[0002] VU 2 on iteration 1 has employee ID 02222... 
INFO[0002] VU 1 on iteration 1 has employee ID 02222... 
INFO[0002] VU 3 on iteration 1 has employee ID 02222... 
INFO[0003] VU 2 on iteration 2 has employee ID 06666... 
INFO[0003] VU 3 on iteration 2 has employee ID 06666... 
INFO[0003] VU 1 on iteration 2 has employee ID 06666... 
INFO[0004] VU 2 on iteration 3 has employee ID 04444... 
INFO[0004] VU 1 on iteration 3 has employee ID 04444... 
INFO[0004] VU 3 on iteration 3 has employee ID 04444... 
INFO[0005] VU 2 on iteration 4 has employee ID 09999... 
INFO[0005] VU 1 on iteration 4 has employee ID 09999... 
INFO[0005] VU 3 on iteration 4 has employee ID 09999...