Feature request: JMeter lacks general pre-processor for POST-data

**Andrej van der Zee** ([Bug 51128](https://bz.apache.org/bugzilla//show_bug.cgi?id=51128&redirect=false)):
Modifying POST-bodies before sending to the server can only be done in external scripts like BeanShell. In particular, when you have a template-file that needs values to be substituted (not in the "name=value" format), it becomes messy and one needs to know the JMeter internals with respect to thread-synchronization.

I would expect a pre-processor with regular expressions (and maybe XPath) to enable substitutions in POST-data, local to the running thread. This would make the learning step lower for non-BeanShell people like me, much more user-friendly and less error-prone (thread-synchronization should be hidden by JMeter instead of explicitly handled in an external script).

IMHO, I think JMeter needs a pre-processor with regex/XPath, analog to the existing post-processors with regex/XPath.

Votes in Bugzilla: 1
OS: All