Pre Processors in JMeter
Content
What are Pre Processors in JMeter?
The Pre Processor elements are used to modify the sampler requests before their processing(hence the name pre-processor).How to add a Pre Processors in JMeter-
Right Click on either of Thread Group/Logic Controller -> Hover over ‘Add’ -> Hover Over ‘Pre Processors’ -> Click on the required Pre Processor Element
Pre Processors provided in JMeter
BeanShell PreProcessor
The BeanShell preprocessor is used to perform some operation using beanshell scripting before a sampler request.
HTML Link Parser
The HTML Link Parser is used to extract links from HTML response fetched from server.
HTTP URL Re-writing Modifier
The HTTP URL Re-writing modifier can be added at either Thread Group level or Sampler level to fetch a specific sessionID parameter from the response of a request and then use the parameter’s value on other requests.
JSR223 PreProcessor
The JSR223 preprocessor is used to perform some operation using JSR223 scripting before a sampler request.
JDBC PreProcessor
The JDBC PreProcessor is used to execute certain specified SQL queries before a sampler request processing.
RegEx User Parameters
The RegEx user parameters are used to extract HTTP parameters from the certain requests using a regular expression and then passed as a request parameter to other sampler requests.
User Parameters
The User parameters are used to specify values for User variables used within Thread Groups.
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Reference
Apache JMeter User Manual
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