# How to pass variable base parameter in http\_poller logstash input plugin
**URL:** https://discuss.elastic.co/t/how-to-pass-variable-base-parameter-in-http-poller-logstash-input-plugin/298621
**Category:** Logstash
**Created:** [March 2, 2022, 1:33pm UTC](https://discuss.elastic.co/t/how-to-pass-variable-base-parameter-in-http-poller-logstash-input-plugin/298621 "2022-03-02T13:33:58Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@Purushottam22](https://discuss.elastic.co/u/Purushottam22)
#### Post date: [March 2, 2022, 1:33pm UTC](https://discuss.elastic.co/t/how-to-pass-variable-base-parameter-in-http-poller-logstash-input-plugin/298621/1 "2022-03-02T13:33:58Z")
Hi All,
Can you please help me with below issue,
I am trying to hit two rest api for below two conditions:
1. First is used for providing the login credentials and it will give an response as session id.
2. I have to use the session id which i get as a first api response in second api hit to will pull actual data using rest api
Sample API requests:
First api: curl -i -k --header "Authorization: Basic cWFAcWE6cWE=" [https://computer.network.net/attunityenterprisemanager/api/v1/login](https://computer.network.net/attunityenterprisemanager/api/v1/login)
second api: CURL.EXE -i -k --header "SessionID: wCo0\_KvjEUFROvfHF5KGrw" [https://computer.network.net/attunityenterprisemanager/api/v1/security/audit\_trail?start\_timestamp={start\_timestamp}&end\_timestamp={end\_timestamp}](https://computer.network.net/attunityenterprisemanager/api/v1/security/audit_trail?start_timestamp=%7Bstart_timestamp%7D&end_timestamp=%7Bend_timestamp%7D)
can anyone help me how can i pass the session id in second api header as a variable value?
@ [Badger](https://discuss.elastic.co/u/Badger) [@elastic\_team](https://discuss.elastic.co/groups/elastic_team) Elastic Team Member
Kindly assist
---
### Author:  [@Badger](https://discuss.elastic.co/u/Badger)
#### Post date: [March 2, 2022, 8:16pm UTC](https://discuss.elastic.co/t/how-to-pass-variable-base-parameter-in-http-poller-logstash-input-plugin/298621/2 "2022-03-02T20:16:41Z")
You cannot do that using an http\_poller input. You will have to use http filters. You can drive the schedule using a heartbeat input
```
heartbeat { interval => 60 }
```
If you can do a login for every audit\_trail request then just use two http filters. If you need to use a single session for everything then you will need to use a single worker thread, and I think you will need to set pipeline.ordered to be true. Maybe something like
```
ruby {
code => '
if ! @@sessionId
event.set("[@metadata][needId]", true)
end
'
}
if ! [@metadata][needId] {
ruby { code => 'event.set([@metadata][id]", @@sessionId)' }
else
http {
# Make the call to api/v1/login
}
# Parse the session id from the response into [@metadata][id]
ruby { code => '@@sessionId = event.get("[@metadata][id]")' }
end
http {
# Make the call to audit_trail
}
```
Note the use of a variable with class scope (@@) so that multiple ruby filters can share it. `[@metadata]` is a field on the event that is ignored by most outputs, so it is useful for temporary variables.
If sessions expire then you will need to add code that sets `@@sessionId` back to nil just before that happens.
---
### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [April 4, 2022, 12:24pm UTC](https://discuss.elastic.co/t/how-to-pass-variable-base-parameter-in-http-poller-logstash-input-plugin/298621/4 "2022-04-04T12:24:56Z")
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