Regex to retrieve a verification token from header

Question

I have some head information from which I would like to extract the "RequestVerificationToken" value associated with the id ="LoginToken".

So in sample below I am after the value starting with "kL5Ukn...".

<span id="loginToken"><input name="__RequestVerificationToken" type="hidden" value="kL5UknRMXsBy5QUMtDFPuBwESd89jK5l1VyF7SliGL8g0NCE-pnbowPMPtEMpi2Nmm9F_626FN-cQ6-miwS-CXXkQUM1" /></span>

<span id="registerToken"><input name="__RequestVerificationToken" type="hidden" value="JDJD9khCZNjXeFGLMcBbqDqNmgR19Z-wy4FueH1CkWCdQQry_cgnKHLuj7uyrquk_gzDotKxN1ZQO8rPEc3fsH21uXc1" /></span>

Thanks

Ah sorry, I've updated the tag. This is using JMeter and its regular expression extractor. — ratsstack, Jun 28 '18 at 01:56

score 1 · Accepted Answer · answered Jun 28 '18 at 02:04

1

Try Regex: id="loginToken".*?value="(.*?)"

and retrieve Group 1.

Demo

answered Jun 28 '18 at 02:04

Matt.G

3,586
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Worked perfectly. Thanks. – ratsstack Jun 28 '18 at 02:27

score 1 · Answer 2 · answered Jun 28 '18 at 05:35

Using regular expressions to parse HTML is not the best idea as regular expressions are:

hard to develop and maintain
hard to read
fragile and sensitive to markup changes as attributes position change or a new line will ruin your script while the response will still be a valid HTML

So I would recommend going for CSS/JQuery Extractor instead, the relevant configuration would be:

Reference name: anything meaningful, i.e. token
CSS/JQuery expression: span[id=loginToken] > input[name=__RequestVerificationToken]
Attribute: value

Other settings may be left intact.

Demo:

Hi, thanks for your reply. I wasn't even aware JMeter had a JQuery extractor. — ratsstack, Jun 29 '18 at 06:14

Regex to retrieve a verification token from header

2 Answers2