Pre processors are elements (actions, assertions or basically whatever) that is going to happen before a sampler is executed. They can be used to extract variables from a response that can be used in the sampler afterwards via configuration elements.
These are the elements that can be used as pre processors:
- HTML Link Parser
- HTTP URL Re-writing Modifier
- HTTP User Parameter Modifier
- User Parameters
- JDBC PreProcessor
- JSR223 PreProcessor
- RegEx User Parameters
- BeanShell PreProcessor
- BSF PreProcessor