[P15] JMeter Regular Expression Extractor (Regular Expression Extractor)

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1. Regular Expression Extractor (Regular Expression Extractor) parameter description

接口需要关联时，可以通过正则表达式提取所需要的值

Right click >>> Add >>> Post Processor >>> Regular Expression Extractor

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Apply to

Main sample and sub-samples: Matches include the current parent sampler and overrides the sub-samplers
Main sample only: default; the matching range is the current parent sampler
Sub-samples only : match only sub-samplers
JMeter Variable Name to use: Supports matching of Jemter variable values (you can enter the variable name of jmeter in the input box)

Response fields to check (Filed to check)

Body: The body part of the response data
Body (unescaped): for the replaced response code part
Body as a Document: returns the content as a document for matching
Response Headers: Response header part
Request Headers: request header part
URL: URL link
Response Code: Response code. For example, the HTTP return code 200 means success
Response Message (Resopnse Message): Response message. For example, if the processing is successful, the word "success" or "OK" will be returned

(1) Reference name (Name of created variable): Request the name of the variable to be referenced, such as filling in result_num

(2), Regular Expression (Regular Expression): the regular expression corresponding to the business

"id":"(.*?)","name":(.\*?)"

(3) Template (Template): the group number corresponding to the regular expression, starting from 1; for example: $1$ means to take the value of id, $2$ means to take the value of name, which is the number corresponding to the expression brackets

(4) Matching numbers (0 for random) (Match No. (0 for Random): 0 for random values, n for the number of matching values, -1 for all; for example: take 1 for the first in the message 1 object matches, 2 means the second object in the message matches

(5), Default Value (Default Value): If the parameter does not get a value, then give a value by default to let it take

Regular Expressions - Tutorial | Novice

2. Preparation

Mumu Fresh: http://111.231.103.117/#/login

After entering the webpage, log in, and the page provides the account and password
Type "shrimp" in the search box
Right-click to check or press F12 to open the debugging tool and click Search

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3. Test plan design

(1), right click on the test plan <<< add <<< configuration element <<< HTTP request default value

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protocol: http
Server name or IP: 111.231.103.117
Port: 8083
Content-Encoding: utf-8

(2) On the web page, click on the network during debugging, find the request, click on the header to find the request header, and copy all the request headers

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(3), right click on the test plan <<< add <<< configuration element <<< HTTP header manager

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Click Add from clipboard, the copied value will be added automatically

(4), right click on the test plan <<< add <<< thread (user) <<< thread group

(5) On the web page, click on the network during debugging, find the request, click on the load, and copy the parameter value

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(6), right click on the thread group <<< add <<< sampler <<< HTTP request

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Protocol: GET
Path: /product/list
Click Add from Clipboard, it will be added automatically; you can also add it manually

(7), HTTP request right click <<< add <<< post processor <<< regular expression extractor

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勾选 Main sample and sub-samples

匹配范围包括当前父采样器并覆盖子采样器

Reference name: userParam

变量名称：userParam

Regular expression:"id":(.*?),"name":"(.*?)

(.*?)：表示匹配任意字符

HTTP请求返回的响应数据响应体中的返回数据格式：[{"id":39,"name":"即食大虾","image":"http://111.231.103.117:8083/images/new-xia.png","detail":"干虾烤虾大对虾干500g淡干烤海虾干货海鲜干货年货","categoryId":13,"price":40,"stock":21925,"status":1,"createTime":"2020-06-28 16:06:34","updateTime":"2020-02-11 00:51:59"},{"id":27,"name":"波士顿大龙虾鲜活冰鲜海鲜水产大只装波龙澳洲龙虾 400-500g 一只装","image":"http://111.231.103.117:8083/images/new-longxia.png","detail":"类别：澳洲龙虾特产品类：澳洲龙虾国产/进口：国产保存状态：冰鲜原产地：中国大陆","categoryId":13,"price":222,"stock":22123,"status":1,"createTime":"2020-06-28 16:06:34","updateTime":"2020-02-11 00:11:30"}]

Template: $2$

取第二个参数

Matching numbers (0 for random): 2

取第二组数据；第二组数据中的id和name

(8), right click on thread group <<< add <<< listener <<< view result tree

(9), right click on the thread group <<< add <<< sampler <<< debug sampler

(10), click to start, click to view the result tree, view the request and sampler information

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HTTP请求中的响应数据，响应体中的数据可以看到，一共有两个符合查询规则的数据

(11) Click the debug sampler to view the response body under the response data

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userParam：正则表达式提取的参数名，获取到的参数值

userParam_g：第2组

userParam_g0：第二组的数据，id和name

userParam_g1：第二组数据的第一个参数，id

userParam_g2：第二组数据的第一个参数，id

(12), Right click on the thread group <<< Add <<< Sampler <<< JSR223 Sampler, write scripts, open the log, clear all, click start

点击选项菜单，点击日志查看

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log.info("输出变量：${userParam}")
log.info("输出变量："+vars.get("userParam"));

如图：可以使用变量名获取参数值