I am trying to extract a specific value I want regardless of match number. I am using -1 for Match No to get all the values. For example, I may get the following values (3 matches):
A
B
C
I may get 2 results (just A & B) sometime or 4 results (A,B,C,D) sometime but I always want to select and use a particular value (say B) irrespective of number of matches returned.
If you add a Debug Sampler you will see the JMeter Variables generated by the Regular Expression Extractor in the View Results Tree listener
so 2nd match can always be referred as ${result_2} (replace result with the actual variable name from your Regular Expression Extractor)
Related
I need to extract 2 dynamic values from the URL -
id
I used the regular expression (.+?) and added to path - /blazor?${id}
I see invalid character error in View results tree.
the number after &_ which changes for each request.
Is it possible to extract a value which changes continuously? How can it be implemented?
Sample URL's:
https://abc.abc.com:8443/_blazor?id=jTl2weD7HcQIS78PcBHbVg&_=1606828427324
https://abc.abc.com:8443/_blazor?id=jTl2weD7HcQIS78PcBHbVg
https://abc.abc.com:8443/_blazor?id=jTl2weD7HcQIS78PcBHbVg&_=1606828427575
https://abc.abc.com:8443/_blazor?id=jTl2weD7HcQIS78PcBHbVg&_=1606828427756
https://abc.abc.com:8443/_blazor?id=jTl2weD7HcQIS78PcBHbVg&_=1606828427885
This number is utterly like to be a current timestamp so instead of extracting you can use JMeter's __time() function for generating it:
If you use just (.+?) - it will match the first character in the URL (which is h) and then stop, if you want to get the ID the relevant regular expression should be something like:
id=(.+?)&
similarly for the timestamp (or whatever it is)
_=(\d+)
or if you want everything after blazor?
_blazor?(.*)
If you're not too comfortable with regular expressions you may find Boundary Extractor easier to use, all you need to do is to provide "left" and "right" boundaries and it will capture everything "in between":
as a little bonus - it works much faster and consumes less resources. More information - The Boundary Extractor vs. the Regular Expression Extractor in JMeter
I have recorded a workflow in Jmeter using Recording controller.
In that workflow, a URL parameter 'member_id' get generated and appear in URL.
This 'member_id' is getting used further in the workflow.
In the recorded script, value of 'member_id' is saved in a variable. Screenshot
Here the problem is; When I execute the scripts, then instead of newly generated 'member_id', the saved value is getting used in the later samples.
I want to fetch the new value and update the saved value, so that it can be used in later samples
I have tried to fix this issue by fetching the 'member_id' from the URL and save it in a variable
I have tried 'Regular Expression Extractor' but I am not able to read the value.
Screenshot
But when I print the response, I am getting only first digit of new 'member_id'.
Screenshot
You're using wrong regular expression, it stops whenever it finds the first match
According to the JMeter documentation on Regular Expressions:
( and ) these enclose the portion of the match string to be returned
. match any character
+ one or more times
? don't be greedy, i.e. stop when first match succeeds
So the solution will be to remove the question mark from your regular expression:
member_id=(.+)
or even better, if you're looking for numbers you should limit your search criteria to digits only like:
member_id=(\d+)
References:
Using RegEx (Regular Expression Extractor) with JMeter
Perl 5 Regex Cheat sheet
Regular expression to fetch a single id from an array of values in Jmeter
some responses having multiple values under organization_ids and some responses will have a single value.
The current regular expression gets values as:
"org_ids":(\[.*?\])
responses:
"org_ids": 1234
some responses:
"org_ids":["12234","133424","234324"]
When multiple values are present in the array need to get only one value.
Response:
"org_ids":["5a7c2","56d0da","5727"]
Please guide which regular expression can give only one value from the above array.
You are grouping the entire array. You can group just the first hit:
"org_ids":\["([^"]*)".*
So the group encloses a single ", then the largest possible non " match, then a single ". Or amending what you have:
"org_ids":\["(.*?)".*
So a non greedy search of everything between two ".
Your response seems utterly like JSON so parsing it using regular expressions is not the best idea, you can easily achieve the same using JSON Extractor
Add JSON Extractor as a child of the request which returns the above data
Configure it as follows:
Names of created variables: anything meaningful, i.e. org_id
JSON Path Expressions: $..org_ids[*]
Match No: 0
That's it, now you will have a random org_id available as ${org_id} JMeter Variable.
References:
Jayway JsonPath
API Testing With JMeter and the JSON Extractor
I have 10 different __viewstate values in jmeter script. one is for login and others are for post methods. how can i use regular expression extractor to parameterize the viewstate for performance testing.
As per regular expression extractor documentation:
If the match number is set to a negative number, then all the possible matches in the sampler data are processed. The variables are set as follows:
refName_matchNr - the number of matches found; could be 0
refName_n, where n = 1,2,3 etc - the strings as generated by the template
refName_n_gm, where m=0,1,2 - the groups for match n
refName - always set to the default value
Set match number -1 for one expression to return all matches from the response.
As RaGe mentioned in the comment, you can just use 1 Regular Expression Extractor to find all the matches for the given pattern.
Regular Expression Extractor - Example
MatchNo :
0 for random
1 for first match
2 for second match and so on.
-1 for all matches
When you enter -1 & get all matches, to access the first match, use TheVariableName_1
I want to capture the certain range of values using regular expression extractor in jmeter. Like "sessionid": "15F36C8A123D4483935062DDE73280CB\x2D0\x3A1",
In the above value I need to exclude the \x2D0\x3A1 and capture the value.
You will have to define two regular expression, assuming that x2 and x3 are good enough token to separate these two fields.
1st : x2([0-9A-Fa-f]+)
2nd : x3([0-9A-Fa-f]+)
Update: I misunderstood the original post and gave the solution to exclude the first part of the session id and extract the two values which seems like some range.