JSR223

JSR223
JMeter 常用内置变量
ctx
CookieManage 和 HeaderManager
断言
官方资料

JSR223

JSR：

Java Specification Requests的缩写，意思是Java规范提案，是指向JCP(Java Community Process)提出新增一个标准化技术规范的正式请求。

JSR 223：

Java 规范请求223 的缩写，它定义了一种在JVM 上运行脚本语言的标准接口。该规范允许在Java 应用程序中使用各种脚本语言如(Grovvy、JavaScript、Python)

Beanshell：

JSR223 规范的一种实现
BeanShell是一种完全符合Java语法规范的脚本语言,并且又拥有自己的一些语法和方法;
BeanShell是一种松散类型的脚本语言(这点和JS类似);
BeanShell是用Java写成的,一个小型的、免费的、可以下载的、嵌入式的Java源代码解释器,具有对象脚本语言特性,非常精简的解释器jar文件大小为175k。
BeanShell执行标准Java语句和表达式,另外包括一些脚本命令和语法。

官网:http://www.BeanShell.org/
GitHub: https://github.com/beanshell/beanshell/wiki

参考文章：

https://blog.csdn.net/ni_hao_fan/article/details/100011142

https://blog.csdn.net/BASK2311/article/details/128231278

https://blog.51cto.com/u_11529070/6665909

JMeter 常用内置变量

vars

public class JMeterVariables
extends Object

介绍：Class which defines JMeter variables. These are similar to properties, but they are local to a single thread.
类，它定义JMeter变量。这些类似于属性，但它们是单个线程的局部属性

API: https://jmeter.apache.org/api/org/apache/jmeter/threads/JMeterVariables.html

打印当前线程的全部变量：

vars.put("zhangsan", "21");

it =vars.getIterator();


while(it.hasNext()){
    entry = it.next();
    log.info("key:" + entry.getKey() + "value:" +  entry.getValue().toString());
}

结果:

2024-05-17 10:20:12,549 INFO o.a.j.u.BeanShellTestElement: key:START.MSvalue:1715912384063
2024-05-17 10:20:12,549 INFO o.a.j.u.BeanShellTestElement: key:TESTSTART.MSvalue:1715912412323
2024-05-17 10:20:12,549 INFO o.a.j.u.BeanShellTestElement: key:JMeterThread.last_sample_okvalue:true
2024-05-17 10:20:12,549 INFO o.a.j.u.BeanShellTestElement: key:__jm__Thread Group__idxvalue:0
2024-05-17 10:20:12,549 INFO o.a.j.u.BeanShellTestElement: key:__jmeter.U_T__value:Thread Group 1-1
2024-05-17 10:20:12,549 INFO o.a.j.u.BeanShellTestElement: key:START.HMSvalue:101944
2024-05-17 10:20:12,550 INFO o.a.j.u.BeanShellTestElement: key:zhangsanvalue:21
2024-05-17 10:20:12,550 INFO o.a.j.u.BeanShellTestElement: key:JMeterThread.packvalue:org.apache.jmeter.threads.SamplePackage@7d70dcc6
2024-05-17 10:20:12,550 INFO o.a.j.u.BeanShellTestElement: key:START.YMDvalue:20240517

public class SampleResult
extends Object
implements Serializable, Cloneable, Searchable

介绍：This is a nice packaging for the various information returned from taking a sample of an entry.
对于从一个条目中获取样本返回的各种信息来说，这是一个很好的包装。

API: https://jmeter.apache.org/api/org/apache/jmeter/samplers/SampleResult.html

ctx

public class JMeterContext
extends Object

Holds context for a thread. Generated by JMeterContextService.
The class is not thread-safe - it is only intended for use within a single thread.
保存线程的上下文。由JMeterContextService生成。该类不是线程安全的，它只适用于单个线程。

API: https://jmeter.apache.org/api/org/apache/jmeter/threads/JMeterContext.html

sample

API: https://jmeter.apache.org/api/org/apache/jmeter/samplers/Sampler.html

public class HTTPSampler
extends HTTPSamplerBase
implements Interruptible

A sampler which understands all the parts necessary to read statistics about HTTP requests, including cookies and authentication. This sampler uses the default Java HTTP implementation
一个采样器，它了解读取HTTP请求统计数据所需的所有部分，包括Cookie和身份验证。此采样器使用默认的Java HTTP实现

继承了 HTTPSamplerBase，大部分方法来自于此：

修改请求体数据

Arguments api: https://jmeter.apache.org/api/org/apache/jmeter/config/Arguments.html

public class Arguments
extends ConfigTestElement
implements Serializable, Iterable<JMeterProperty>

A set of Argument objects.

应用场景：将请求体进行加密处理

import org.apache.jmeter.config.Arguments;
import org.apache.jmeter.config.Argument;
import org.json.*;

Arguments a = sampler.getArguments();

// 获取所有参数
log.info("Arguments a: " + a.toString());

//获取请求体数据
Argument arg = a.getArgument(0);

//请求体封装为JSON
JSONObject o = new JSONObject(arg.getValue()); 


log.info("JSONObject o" + o.toString());

o.put("name", "zhangsan");  //添加值
arg.setValue(o.toString()); //重新设置请求体

输出：

2023-06-30 11:26:00,747 INFO o.a.j.u.BeanShellTestElement: Arguments a: ={
  "dispatchType": true,
  "expressType": "",
  "invoiceType": null,
  "remark": "",
  "invoiceOrganization": null,
  "customerInvoiceInfoAccessId": null,
  "preOrderBatchNumber": "cec944da85964c2fb36e5462ec91827e",
  "receiverInfoAccessId": "f1bf62a1049143069c0d670c073c9c02",
  "collarCouponNo": "",
  "bizOrderType": "fa",
  "deliveryBatchCode": ""
}()
2023-06-30 11:26:00,748 INFO o.a.j.u.BeanShellTestElement: JSONObject o{"customerInvoiceInfoAccessId":null,"dispatchType":true,"invoiceOrganization":null,"receiverInfoAccessId":"f1bf62a1049143069c0d670c073c9c02","collarCouponNo":"","expressType":"","invoiceType":null,"remark":"","bizOrderType":"fa","preOrderBatchNumber":"cec944da85964c2fb36e5462ec91827e","deliveryBatchCode":""}

添加参数成功:

参考：https://blog.csdn.net/syd505/article/details/120347728

看一下一个请求中的Arguments 中都有什么内容：Arguments 实现了 Iterable

public interface JMeterProperty
extends Serializable, Cloneable, Comparable<JMeterProperty>

比较用的方法：

String getName()
String getStringValue()

import org.apache.jmeter.config.Arguments;
import org.apache.jmeter.config.Argument;
import org.apache.jmeter.testelement.property.JMeterProperty;

Arguments a = sampler.getArguments();

for(Object o : a){
	JMeterProperty js = (JMeterProperty) o;
	log.info("name: " + js.getName() + "value:" +  js.getStringValue());
}

结果：

添加请求头数据

import org.apache.jmeter.protocol.http.control.HeaderManager;
import org.apache.jmeter.protocol.http.control.Header;

// 获得请求头信息
HeaderManager headers = sampler.getHeaderManager();
// 打印全部请求头信息
log.info("添加前" + headers.getHeaders().getStringValue());
// new一个Header对象
myHeader = new Header("User-Agent", "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36");
// 添加Header到请求头管理器
headers.add(myHeader);
// 打印全部请求头信息
log.info("添加后" + headers.getHeaders().getStringValue());

log：

请求头成功添加User-Agent：

删除请求头

需求：删除 User-Agent

import org.apache.jmeter.protocol.http.control.HeaderManager;
import org.apache.jmeter.protocol.http.control.Header;

// 获得请求头信息
HeaderManager headers = sampler.getHeaderManager();
// 打印全部请求头信息
log.info("添加前" + headers.getHeaders().getStringValue());
// new一个Header对象
headers.removeHeaderNamed("User-Agent");
// 打印全部请求头信息
log.info("添加后" + headers.getHeaders().getStringValue());

log:

删除请求头User-Agent 成功：

获取每个请求头对象:

import org.apache.jmeter.protocol.http.control.HeaderManager;
import org.apache.jmeter.protocol.http.control.Header;
import org.apache.jmeter.testelement.property.CollectionProperty;
import org.apache.jmeter.testelement.property.JMeterProperty;

// 获得请求头信息
HeaderManager headerManager = sampler.getHeaderManager();

CollectionProperty headers = headerManager.getHeaders();

for(JMeterProperty p : headers){
    log.info("header name:" + p.getName()+",header value:" + p.getStringValue());
}

log.info(headers.toString());

ctx

Holds context for a thread. Generated by JMeterContextService.
The class is not thread-safe - it is only intended for use within a single thread.

API: https://jmeter.apache.org/api/org/apache/jmeter/threads/JMeterContext.html

获取Jmeter的所有属性信息：

p = ctx.getProperties();

Set keys = p.stringPropertyNames();

for(String key: keys){
	log.info("key:" + key +"," + "value: " + p.	getProperty(key));
}