# Filter Grook

**URL:** https://discuss.elastic.co/t/filter-grook/223728
**Category:** Logstash
**Created:** [March 16, 2020, 10:16am UTC](https://discuss.elastic.co/t/filter-grook/223728 "2020-03-16T10:16:16Z")
**Posts on this page:** 3
**Page:** 1

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### Author: ![Ramon\_Mateo](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/ramon_mateo/32/46306_2.png) [@Ramon\_Mateo](https://discuss.elastic.co/u/Ramon_Mateo)
#### Post date: [March 16, 2020, 10:16am UTC](https://discuss.elastic.co/t/filter-grook/223728/1 "2020-03-16T10:16:17Z")

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Hi, i have a little issue, my program send files to logstash with this format:

"tenantID": 81883, "Size": 0.1, "FirstDate": "01/23/2020 22:45:32", "LastDate": "123/21/2020 22:45:32"

My problem is when logstash receives this receives FirstDate and LastDate do like this:

FirstDate = 23% 2F01% 2F2020 + 22% 3A45% 3A32 & LastDate = 12% 2F21% 2F2020 + 22% 3A45% 3A32

How can i filter and obtain data?

Thanks for advanced!

---

<div class="post-metadata">

### Author: ![Fabio-sama](https://avatars.discourse-cdn.com/v4/letter/f/b9e5f3/32.png) [@Fabio-sama](https://discuss.elastic.co/u/Fabio-sama)
#### Post date: [March 16, 2020, 2:42pm UTC](https://discuss.elastic.co/t/filter-grook/223728/2 "2020-03-16T14:42:50Z")

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Hi there,

can you please post here ( **properly spaced and formatted** ) what is returned on the standard output with this pipeline:

```
input {
  whatever your input is
}

filter {}

output {
  stdout{}
}

```

Thanks!

---

<div class="post-metadata">

### Author: ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)
#### Post date: [April 13, 2020, 2:42pm UTC](https://discuss.elastic.co/t/filter-grook/223728/3 "2020-04-13T14:42:57Z")

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