Using Jmeter I was trying to extract the value of a token from the following, using the regular expression extractor:
<input name="__RequestVerificationToken" type="hidden"
value="BeRYiSIRjZoQHq4VW8qbkgXlnnzdUINpFNoYF_ugx-FRk0tkImbQPhwyYjyz_0Q-w6F2A0gDOfMZrdklD6rVn6-QnYggfImb55f90V7nrD_kbSkT3-y3gPqoTFg0ynTBLyX5Lw2" />
When I used the following expression:
name="__RequestVerificationToken" type="hidden" value="(.+?)"
the value was not extracted.
After a few searches I used the following expression:
name="__RequestVerificationToken" type="hidden" value="([A-Za-z0-9-_]+?)"
which worked, but I don't know why :d.
My question: why the first expression didn't worked since basically tells to extract any character that matches one or more times.
use this
name="__RequestVerificationToken" type="hidden"\s*value="(.+?)"
or the best is
name="__RequestVerificationToken" type="hidden"\s*value="([^"]*)"
Both of yours will not work as between type and value there is a \n which you have not taken care of.Now it works.See demo.
http://regex101.com/r/dK1xR4/14
First of all, don't use Regular Expressions to extract data from HTML. It is complicated and very fragile in case of even slight DOM changes.
JMeter provides the following components to extract data from HTML responses:
XPath Extractor
CSS/JQuery Extractor
XPath Extractor Guide
Add Xpath Extractor as a child of the request which produces that response
Configure it as follows:
Reference name: anything meaningful, i.e. token
XPath query: //input[#name='__RequestVerificationToken']/#value
If your response is not valid XHTML check Use Tidy box
Refer to extracted value as ${token} or ${__V(token)} where required. Remember that JMeter Variables scope is limited to current thread group only.
For more information see Using the XPath Extractor in JMeter
CSS/JQuery Extractor Guide
Add CSS/JQuery Extractor as a child of the request which produces that authentication token response
Configure it as follows:
Reference name: anything meaningful, i.e. token
CSS/JQuery expression: input[name=__RequestVerificationToken]
Attribute: value
Refer to extracted value as ${token} or ${__V(token)} where required. Same restriction on JMeter Variables scope apply.
See JSoup selector syntax guide for a reference on how to build CSS selectors.
Hope this helps.
Related
<input type="hidden" name="_csrf"
value="40ea7f46-799b-4ca0-b8cd-4adfba082aed" />
Above is the token I am getting in the request output. I am unable to replace this with a regular expression in Regular Expression Extractor of Jmeter.
<input type="hidden" name="_csrf" value="(.+?)" /> is not working.
Please help.
If your input actually contains a newline character, then you need to account for that in your regex. Furthermore, better be explicit about the valid characters in your regex, .+ is rarely a good thing:
<input type="hidden"\s+name="_csrf"\s+value="([^"]+)"\s*/>
you have to be careful with the spaces/newlines.
try with following simple regex:
value="(.*?)"\s/>
If it matches more than one element, to add uniquness, you can add name attribute in the regex as follows:
name="_csrf"\s+value="(.*?)"\s/>
This is another evidence for not using regular expressions to parse HTML as they are very fragile and sensitive to minimal markup changes. The more robust and resilient solution is using CSS/JQuery Extractor or XPath Extractor instead.
The relevant CSS Expression is input[name=_csrf], use value as "attribute"
The XPath query to get the value is //input[#name='_csrf']/#value
See How to Load Test CSRF-Protected Web Sites guide for detailed information on bypassing XSRF protection in JMeter tests
Code is:
<input name="__RequestVerificationToken" type="hidden" value="Yekn8BJNbXaydRs8yq1GEmDogsFoSh8AGyOKmjLn0zFvhmADPYrqU43/foLoEzJk4yEeNSg78pCIJh6uxuyWf9foM7VsZayC2trOXwUA2hyUWSAf9mBC8vN60ccAVki37fC1LNHhAlDkthgmsM3WNxJwvVGWMj2TMqoONGI0aj5b2hJkQMMClKx0zhthqtD8" />
My Jmeter config. is given below as screenshot :
What is incorrect I did here :( It is not logging & giving error : Object moved to here
In your regular expression extractor, your regular expression needs to be
<input name="__RequestVerificationToken" type="hidden" value="(.+?)"
instead of what you have now. It should work once you change that.
This is why you shouldn't use regular expressions for parsing HTML: one of the reasons is that HTML-oriented regular expressions would be very fragile and sensitive to any line-break, space, tags order, etc.
So the options are:
CSS/JQuery Extractor. Relevant config would be:
CSS/JQuery Expression: input[name=__RequestVerificationToken]
Attribute: value
XPath Extractor. Configure it as follows:
XPath Expression: //input[#name='__RequestVerificationToken']/#value
if your response is not XML/XHTML-compliant you'll also need to check Use Tidy (tolerant parser) box
I want to use jmeters regular expression extractor to catch a link from an HTTP response I have. How do I catch only whats inside the ? I want the TEXT.
<a([^>]+)>(.+?)<\/a>
The expression above gives me the whole link with the a tag and href.
I would rather recommend not using regular expressions for getting data from HTML as href attribute may be located in differently, at new line, etc. See the epic comment on SO for detailed explanation.
JMeter provides 2 test elements which can be used to extract href attribute from HTML page links:
XPath Extractor
CSS/JQuery Extractor
XPath Example
Add XPath Extractor as a child of the request (just like Regular Expression Extractor)
Configure it as follows:
If your response is not XHTML compliant - check Use Tidy box
Reference name - anything meaningful, i.e. href
XPath query - //a/#href
You can refer to extracted link URL as ${href} anywhere in current thread group.
In case of multiple matches URLs can be accessed as ${href_1} ${href_2} etc.
For more information on the XPath Extractor see Using the XPath Extractor in JMeter guide
CSS/JQuery Example
Add CSS/JQuery Extractor as a child of the request
Configure it as follows:
Reference name - any variable name, i.e. href
CSS/JQuery expression - a
Attribute - href
Match no:
default is blank - will return the first link
any number > 0 - will return match number
0 - will return random link URL
-1 - will return all link URLs and store them as ${href_1} ${href_2} etc.
For CSS/JQuery expressions building information refer to JSOUP selector syntax guide
Try with this:
<a[^>]* href="([^"]*)"
regular expression for finding 'href' value of a <a> link
Try this.
use group 1 to get the content from tag.
<a(?: [^>]+)?>((?:(?!<\/?a[ >]).)*)<\/a>
SEE DEMO: http://regex101.com/r/rV3eH6/1
I have tried to put input\s+name=”authenticity_token”\s+type=”hidden”\s+value=”(.*?)”\s*\ in Jmeter's Regular Expression Extractor but that is not helping and test fails. For Template I kept $1$ always.
On viewing source of page it was written like this:
<input name="utf8" type="hidden" value="✓" /><input name="authenticity_token" type="hidden" value="OzzoQsvruAetQAiAMj5Mh4L730w0PUxzoALcgT3dI+o=" />Based on above, how should I write contents for Regualr Expression Extractor
Please see pic below:
Its Ruby on Rails application
As per https://stackoverflow.com/a/1732454/2897748
You can't parse [X]HTML with regex. Because HTML can't be parsed by regex. Regex is not a tool that can be used to correctly parse HTML.
I would strongly recommend using one of the following:
CSS/JQuery Extractor
XPath Extractor
Example configuration of above to match your hidden input value:
CSS/JQuery
Reference Name: token
CSS/JQuery Expression: input[name=authenticity_token]
Attribute: value
XPath
Use Tidy - tick (if your response isn't XML/XHTML compliant)
Reference Name: token
XPath Query: //input[#name='authenticity_token']/#value
If you still need to stick to Regular Expression Extractor, following configuration might help:
Reference Name: token
Regular Expression: <input name="authenticity_token" type="hidden" value="(.+?)" />
Template: $1$
But it will be very sensitive and fragile i.e. in case of attributes different order, multiline layout, etc. I would recommend consider using above extractors instead.
Hope this helps.
This is my html
<input name="__RequestVerificationToken" type="hidden" value="A9y6Ndf7Q2XP2Yz6zhaVChoIvpQGUrZRTvu9D_HnHnUcFBVInerxCjU4vpOXQYVhFwnzl-zAzkvtto7BLAVVr">
I want to extract value in jmeter Regular Expression Extractor.
This is my regx window but when i post it i will not get expected token it is something like this __RequestVerificationToken=%24%7Bauth_token%7D.
Try using $1$ as a Template, it should resolve your issue.
Looking into your request I can see that you're sending %24%7Bauth_token%7D which being decoded looks like ${auth_token} so you use case is not correct.
You need 2 requests:
GET request to get the page and extract RequestVerificationToken and store it to auth_token variable.
POST Request which will use auth_token variable.
See Using Regular Expressions in JMeter guide for more details.
By the way, you can use combination of Debug Sampler and View Results Tree listener to see if there are any matches. It should be more convenient w.r.t. groups and variables.
In general, it isn't recommended to use Regular Expressions to parse HTML. I would suggest to use XPath Extractor instead. Relevant XPath expression will look like:
//input[#name='__RequestVerificationToken']/#value
Few things to notice:
If you page isn't XHTML compliant you'll need to check Use Tidy box in XPath Extractor
JMeter 2.11 provides nice XPath Tester right in View Results Tree Listener
We need to set the following Regular Expression Extractor values to extract the auth token values
Reference Name : Auth_Token
Regular Expression : <input\sname="__RequestVerificationToken"\stype="hidden"\svalue="(.+)">
Template : $1$
Match No : 1
Default values : NOT FOUND TOKENS