如何解析 Jmeter 响应并发出新请求 [英] How to parse Jmeter response and make a new request

问题描述

我正在使用 jMeter 来测试 Tomcat 应用程序.我需要解析 jMeter 响应并发出第二个请求.第一个响应如下所示:

I'm using jMeter to test a Tomcat application. I need to parse the jMeter response and make a second request. The first response looks like this:

<responseData class="java.lang.String">&lt;html&gt;&#xd;
&lt;body&gt;&#xd;
ERROR=0&#xd;
MSG=N/A&#xd;
FILELIST=1555;1340778737370;1526545487;&#xd;
VERSION=1.002&#xd;
URL=https://192.168.100.46/updserver/download?action=signature_download&amp;token=&#xd;
INTERVAL=0&#xd;
&lt;/body&gt;&#xd;
&lt;/html&gt;&#xd;
</responseData>

我需要提取FILELIST"和URL"变量并将它们注入到一个新的 URL 中:

I need to extract the "FILELIST" and "URL" variables and inject them into a new URL:

https://192.168.100.46/updserver/download?action=signature_download&token=1555;1340778737370;1526545487;


我知道有一些后处理器可以做到这一点，但不知道如何去做.顺便说一句，第二个请求将从 Tomcat servlet 下载一些文件，有没有办法让 jMeter 只下载流而不写入物理文件?这样我就可以对我的 servlet 进行负载性能测试.

I know there is some post-processor to do that, but no clue how to do it. BTW, the second request will download some file from the Tomcat servlet, is there a way to let jMeter just download the stream but without writing to a physical file? So that I could do a load performance test against my servlet.

推荐答案

好的，你已经知道如何从你的回复中提取 url，我在我之前的回答中描述了如何:

Ok so you already know how to extract url out of your response, I described how in my previous answer :

https://stackoverflow.com/a/11188349/169277

但在这里我将对此进行扩展.所以你有你的采样器，你已经有了 ${url}.现在你需要 FILELIST 并组装新的 url.

But here I'll just expand on that. So you have your sampler and you already got ${url}. Now you need FILELIST and assemble new url.

假设您已经准备好请求和 url 提取器.添加一个新的正则表达式提取器.

Assuming you already have request and url extractor in place. Add a new Regular expression extractor.

右键单击请求采样器 ->后处理器 ->正则表达式提取器

Reference Name : FILELIST
Regular Expression : FILELIST=(S+)
Template : $1$
Match No. (0 for Random): 1

所以现在您有 1 个请求采样器和 2 个正则表达式提取器.您需要添加额外的后处理器才能组装新的 url.

So now you have 1 request sampler and 2 regular expression extractors. You need to add additional post processor to be able to assemble the new url.

右键单击请求采样器 ->后处理器 ->BSF 后处理器

从Script language 下的语言下拉列表中选择beanshell 并在大字段Script: 中粘贴:

Choose the beanshell from the language droplist under the Script language and in the big field Script: paste this :

vars.put("NEW_URL", "${__javaScript('${url}'.replace('
','${FILELIST}'))}");

现在您可以在测试中进一步使用 ${NEW_URL}.

And now you have ${NEW_URL} to use further in your tests.

解决问题的方法总是不止一种，这个班轮看起来很丑，但它确实起到了作用.

在我的测试中，结果如您所愿(调试采样器):

In my test the result is as you requested (Debug Sampler) :

url=https://192.168.100.46/updserver/download?action=signature_download&token=
FILELIST=1555;1340778737370;1526545487;
NEW_URL=https://192.168.100.46/updserver/download?action=signature_download&token=1555;1340778737370;1526545487;


我想我不明白您如何命名变量.但最终结果是您在问题中描述的结果.请参阅工作示例附带的 .jmx 测试:

I think I don't understand how you name your variables. But the end result is the one you described in your question. Please see the .jmx test attached with working example :

http://www.filefactory.com/file/1q7nfitmh4qd/n/so_11309469_jx

这是一个 jmeter .jmx 文件，适用于 2.6+ 版本的 jmeter

It's a jmeter .jmx file working with 2.6+ version of jmeter

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