How to make regular expression unique for multiple values

Question

My response having same values at 2 places like

http://images.123456_120*75
http://images.123456_120*75
http://images.784217_120*75
http://images.784217_120*75

In this I need to capture 123456 & 784217 only one time.

I was using regex as http://images.(.+?)_120*75 which extracting all 4 values .But my concern is I need one value among 2 for each. Can u pls help me thanks in advance ?

score 0 · Answer 1 · answered Aug 28 '18 at 13:32

0

One way, is to have 2 post processor with the same regex. Now, in the 1st regular extractor use Match No: value as 1 and in 2nd use Match No: value as 4.

Hope this helps.

answered Aug 28 '18 at 13:32

sunny_teo

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But if the index number of each value isn't known? – Ori Marko Aug 28 '18 at 13:35
it is ok but we need to pass each variable once as u shown in the image. but not only 2 values are in my response there are a lot actually I want to make them unique and want to pass at once – biyyapu Aug 29 '18 at 05:02

score 0 · Answer 2 · answered Aug 28 '18 at 14:20

0

Doing it using regular expressions is quite tricky, I would recommend going for JSR223 PostProcessor and Groovy language instead.

Add JSR223 PostProcessor as a child of the request which returns above images URLs

Put the following code into "Script" area

(prev.getResponseDataAsString() =~ "http://images.(\\d+)_120\\*75").findAll().unique().eachWithIndex {match, idx ->
    vars.put('image_' + idx,match.get(1))
}

If everything goes well you should see the following JMeter Variables generated:
```
image_0=123456
image_1=784217
etc.
```

answered Aug 28 '18 at 14:20

Dmitri T

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thnku Dmitri i'll try this and let u know. – biyyapu Aug 30 '18 at 06:48
it is giving regex.patternsyntaxexception: illegeal/unsupported escape sequence near index 75 – biyyapu Aug 30 '18 at 07:22

The Scientific Method · Answer 3 · 2018-08-29T06:07:57.323

0

This should work, it captures unique values only once:

(\d+)(?:_)(?![\s\S]*\1)

Try Demo here

Explanation

(\d+)(?:_)(?![\s\S]*\1)

1st Capturing Group (\d+)

\d+ matches a digit (equal to [0-9])

Quantifier — Matches between one and unlimited times, as many times as possible, giving back as needed (greedy)

Non-capturing group (?:_)

_ matches the character _ literally (case sensitive)

Negative Lookahead (?![\s\S]*\1)

Assert that the Regex below does not match Match a single character present in the list below [\s\S]*

Quantifier — Matches between zero and unlimited times, as many times as possible, giving back as needed (greedy)

\s matches any whitespace character (equal to [\r\n\t\f\v ])

\S matches any non-whitespace character (equal to [^\r\n\t\f\v ])

\1 matches the same text as most recently matched by the 1st capturing group

edited Aug 29 '18 at 06:07

answered Aug 28 '18 at 14:50

The Scientific Method

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The ids to capture are dynamic – Ori Marko Aug 28 '18 at 15:06
@user7294900 but your question reads like that. do you know their range? – The Scientific Method Aug 28 '18 at 15:12
the above expression is ok but I don know the values which should come in the response and there are no only 2 values there are a lot of multiple repeted one I wan to make all unique – biyyapu Aug 29 '18 at 05:00
@biyyapu you can try it now, it is capturing multiple unique values. – The Scientific Method Aug 29 '18 at 05:56
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@biyyapu I'm not the OP, biyyapu should say if it work – Ori Marko Aug 29 '18 at 13:20
sorry I think u didn't understand my query. if there are 2 same responses I need to pic only one and there are lot of repeated responses .hope u understand my query – biyyapu Aug 30 '18 at 06:46
as I mentioned the responses which are repeated in that I need to capture one for each.. – biyyapu Aug 30 '18 at 06:47
yes tried but not working it was capturing some other value from the response – biyyapu Aug 30 '18 at 12:40

The fourth bird · Answer 4 · 2018-08-30T20:05:31.547

0

Perhaps you could capture the whole match in a group and capture the digits in a second group. Then use a negative lookahead to assert that what is captured in group 1 does not occur anymore giving you the unique values.

The digits you want to match are in capturing group 2. Note that to match the dot . and the asterix * literally you have to escape them.

(http://images\.(\d+)_120\*75)(?![\s\S]*\1)

Regex demo

edited Aug 30 '18 at 20:05

answered Aug 30 '18 at 20:00

The fourth bird

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How to make regular expression unique for multiple values

4 Answers4