Question

I have a JMeter Regular Expression Extractor which searches for the following regular expression:

myId=[0-9]{10}

This retrieves the 10 digit numeric id number from my websites form. I then set a “Reference Name” of myId for the id number. My template value is $0$ and my match No. is set to blank.

In my HTTP Request, I then pass a parameter value of:

${myId}

When I run my JMeter test, it inserts text in the form of:

myId=myId=1234567890

How do I get rid of the duplicate myId=?

Answer 1

Not sure about JMeter’s implementation of RegEx but normally

myId=[0-9]{10}

would match everything, including myId=. What you need is to define capture groups that you want extracted using () and then you will reference the capture group array and get the item you want. E.g.

myId=([0-9]{10})

group 0 would still be the whole thing but group 1 would be just the numeric portion as delimited by (), i.e. without myId=. Hope this helps.