不同的压力工具在参数化的实现逻辑上也会不同,但是参数化必须依赖业务逻辑,而不是工具中能做到什么功能。所以在参数化之前,我们必须分析真实业务逻辑中如何使用数据,再在工具中选择相对应的组合参数的方式去实现。
在 Locust 工具中有怎么使用参数化完成工作,在开展工作开始前,先了解 Python 中的一个 Queue 类,queue它是一个队列数据结构是先进先出的数据结构,具体原理大家自己查询即可。
Queue种类:
FIFO:
Queue.Queue(maxsize=0)
FIFO即First in First Out,先进先出。Queue提供了一个基本的FIFO容器,使用方法很简单,maxsize是个整数,指明了队列中能存放的数据个数的上限。一旦达到上限,插入会导致阻塞,直到队列中的数据被消费掉。如果maxsize小于或者等于0,队列大小没有限制。
LIFO
Queue.LifoQueue(maxsize=0)
LIFO即Last in First Out,后进先出。与栈的类似,使用也很简单,maxsize用法同上。
priority
class Queue.PriorityQueue(maxsize=0)
构造一个优先队列。maxsize用法同上。
基本方法:
队列 queue 多应用在多线程应用中,多线程访问共享变量。对于多线程而言,访问共享变量时,队列queue是线程安全的。
有以上简单基础知识后,直接上 Locust 脚本怎么编写参数化,直接仿照即可写出参数脚本,下面是简单一个参数化代码。
import csv
import os, requests
import queue
from locust import TaskSet, task, HttpUser
from requests.packages.urllib3.exceptions import InsecureRequestWarning
# 禁用安全请求警告
requests.packages.urllib3.disable_warnings(InsecureRequestWarning)
def fnReadData():
f = open("uuid.text", "r") #读取参数文件
data = [] #声明空列表
data = csv.reader(f) #通过 csv读取文件内容
s = queue.Queue() #实例化一个queue对象
for each in data: #循环读取open里面的数据
for key in each:
try:
s.put_nowait(key) #put到队列中
except queue.Full:
print("Queue overflow")
f.close()
return s
class MyBlogs(TaskSet):
# 访问我的博客首页
@task(1)
def get_blog(self):
# 定义请求头
header = {
"User-Agent": "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/69.0.3497.100 Safari/537.36"}
data = self.user.queueData.get()
req = self.client.get("/357712148/%s" % data, headers=header, verify=False)
if req.status_code == 200:
print("success")
else:
print("fails")
class httpGet(HttpUser):
tasks = [MyBlogs]
min_wait = 3000 # 单位为毫秒
max_wait = 6000 # 单位为毫秒
queueData = fnReadData() # 队列实例化
if __name__ == "__main__":
#通过好
os.system("locust -f lcome.py --host=https://blog.com --headless -u 1 -r 1 -t 1s")
参数化文件:
运行结果:
[2021-04-25 13:39:51,536] liwen.local/INFO/locust.main: Run time limit set to 1 seconds
[2021-04-25 13:39:51,536] liwen.local/INFO/locust.main: Starting Locust 1.4.4
[2021-04-25 13:39:51,536] liwen.local/INFO/locust.runners: Spawning 1 users at the rate 1 users/s (0 users already running)...
[2021-04-25 13:39:51,536] liwen.local/INFO/locust.runners: All users spawned: httpGet: 1 (1 total running)
[2021-04-25 13:39:51,537] liwen.local/INFO/root: Terminal was not a tty. Keyboard input disabled
Name # reqs # fails | Avg Min Max Median | req/s failures/s
--------------------------------------------------------------------------------------------------------------------------------------------
--------------------------------------------------------------------------------------------------------------------------------------------
Aggregated 0 0(0.00%) | 0 0 0 0 | 0.00 0.00
success
success
success
[2021-04-25 13:39:52,536] liwen.local/INFO/locust.main: Time limit reached. Stopping Locust.
[2021-04-25 13:39:52,537] liwen.local/INFO/locust.runners: Stopping 1 users
[2021-04-25 13:39:52,537] liwen.local/INFO/locust.runners: 1 Users have been stopped, 0 still running
[2021-04-25 13:39:52,537] liwen.local/INFO/locust.main: Running teardowns...
[2021-04-25 13:39:52,537] liwen.local/INFO/locust.main: Shutting down (exit code 0), bye.
[2021-04-25 13:39:52,537] liwen.local/INFO/locust.main: Cleaning up runner...
Name # reqs # fails | Avg Min Max Median | req/s failures/s
--------------------------------------------------------------------------------------------------------------------------------------------
GET /357712148/2525651 1 0(0.00%) | 238 238 238 238 | 1.30 0.00
GET /357712148/2532241 1 0(0.00%) | 210 210 210 210 | 1.30 0.00
GET /357712148/2562906 1 0(0.00%) | 320 320 320 320 | 1.30 0.00
--------------------------------------------------------------------------------------------------------------------------------------------
Aggregated 3 0(0.00%) | 256 210 320 240 | 3.89 0.00
Response time percentiles (approximated)
Type Name 50% 66% 75% 80% 90% 95% 98% 99% 99.9% 99.99% 100% # reqs
--------|------------------------------------------------------------|---------|------|------|------|------|------|------|------|------|------|------|------|
GET /357712148/2525651 240 240 240 240 240 240 240 240 240 240 240 1
GET /357712148/2532241 210 210 210 210 210 210 210 210 210 210 210 1
GET /357712148/2562906 320 320 320 320 320 320 320 320 320 320 320 1
--------|------------------------------------------------------------|---------|------|------|------|------|------|------|------|------|------|------|------|
None Aggregated 240 240 320 320 320 320 320 320 320 320 320 3
相对于关联都是获取响应结果来做入参,关联理论请参考关联和断言:一动一静,核心都是在取数据 这里面理论已经讲解很清楚,现在看看 locust 怎么关联数据。
打开项目工程 关键内容如下:
/**
* 需要关联的数据
*
* @param id
* @return
*/
@GetMapping("/associated/{id}")
@ResponseBody
public R associated(@PathVariable Integer id) {
HashMap<String, Object> map = new HashMap<>();
if (StringUtils.isEmpty(id)) {
return R.error();
} else if (id == 1) {
HttpHeaders headers = new HttpHeaders();
//根据自己的需要动态添加你想要的content type
headers.add(HttpHeaders.CONTENT_TYPE, MediaType.APPLICATION_JSON_VALUE);
map.put("des", "关联数据");
map.put("rew", 6666);
map.put("header", headers);
return R.ok().put("data", map);
} else {
return R.error().put("data", map);
}
}
/**
* 需要关联的数据
*
* @param id
* @return
*/
@GetMapping("/associated/data/{id}")
@ResponseBody
public R associatedData(@PathVariable Integer id) {
HashMap<String, Object> map = new HashMap<>();
if (StringUtils.isEmpty(id)) {
return R.error();
} else if (id == 6666) {
map.put("des", "关联数据成功");
map.put("rew", 8888);
return R.ok().put("data", map);
} else {
return R.error().put("data", map);
}
}
locust 脚本参考:
def get_param(self):
'''获取参数'''
response = self.client.get("/associated/1")
print("Response json:", type(response.json())) # 判断类型
print("Response json:", response.json())
res = response.json() # 转换字典
return res['data']['rew'] # 获取参数
@task(1)
def request_param(self):
'''关联参数请求'''
id = self.get_param()
response = self.client.get("/associated/data/%s" % id)
print("Response json:", type(response.json())) # 判断类型
print("Response json:", response.json())
结果:
[2021-04-25 22:52:25,837] liwen.local/INFO/locust.main: Run time limit set to 1 seconds
[2021-04-25 22:52:25,837] liwen.local/INFO/locust.main: Starting Locust 1.4.4
[2021-04-25 22:52:25,837] liwen.local/INFO/locust.runners: Spawning 1 users at the rate 1 users/s (0 users already running)...
[2021-04-25 22:52:25,838] liwen.local/INFO/locust.runners: All users spawned: webTestDunShan: 1 (1 total running)
[2021-04-25 22:52:25,838] liwen.local/INFO/root: Terminal was not a tty. Keyboard input disabled
Name # reqs # fails | Avg Min Max Median | req/s failures/s
--------------------------------------------------------------------------------------------------------------------------------------------
--------------------------------------------------------------------------------------------------------------------------------------------
Aggregated 0 0(0.00%) | 0 0 0 0 | 0.00 0.00
Response json: <class 'dict'>
Response json: {'msg': 'success', 'code': 0, 'data': {'des': '关联数据', 'rew': 6666, 'header': {'Content-Type': ['application/json']}}}
Response json: <class 'dict'>
Response json: {'msg': 'success', 'code': 0, 'data': {'des': '关联数据成功', 'rew': 8888}}
.....
略
....
Response json: {'msg': 'success', 'code': 0, 'data': {'des': '关联数据成功', 'rew': 8888}}
Response json: <class 'dict'>
Response json: {'msg': 'success', 'code': 0, 'data': {'des': '关联数据', 'rew': 6666, 'header': {'Content-Type': ['application/json']}}}
[2021-04-25 22:52:26,705] liwen.local/INFO/locust.main: Time limit reached. Stopping Locust.
[2021-04-25 22:52:26,705] liwen.local/INFO/locust.runners: Stopping 1 users
[2021-04-25 22:52:26,705] liwen.local/INFO/locust.runners: 1 Users have been stopped, 0 still running
[2021-04-25 22:52:26,705] liwen.local/INFO/locust.main: Running teardowns...
[2021-04-25 22:52:26,705] liwen.local/INFO/locust.main: Shutting down (exit code 0), bye.
[2021-04-25 22:52:26,705] liwen.local/INFO/locust.main: Cleaning up runner...
Name # reqs # fails | Avg Min Max Median | req/s failures/s
--------------------------------------------------------------------------------------------------------------------------------------------
GET /associated/1 406 0(0.00%) | 0 0 5 1 | 468.35 0.00
GET /associated/data/6666 405 0(0.00%) | 1 0 7 1 | 467.20 0.00
--------------------------------------------------------------------------------------------------------------------------------------------
Aggregated 811 0(0.00%) | 0 0 7 1 | 935.55 0.00
Response time percentiles (approximated)
Type Name 50% 66% 75% 80% 90% 95% 98% 99% 99.9% 99.99% 100% # reqs
--------|------------------------------------------------------------|---------|------|------|------|------|------|------|------|------|------|------|------|
GET /associated/1 1 1 1 1 1 1 1 1 5 5 5 406
GET /associated/data/6666 1 1 1 1 1 1 1 2 7 7 7 405
--------|------------------------------------------------------------|---------|------|------|------|------|------|------|------|------|------|------|------|
None Aggregated
Locust 的参数化与关联需要自己写相应代码才能完成,但对性能工程师来说学习 Python 代码是不可绕过去的事情。上面是简单的参数化与关联代码希望对大家有帮助,
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原文链接 : https://zuozewei.blog.csdn.net/article/details/122404017
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