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Dicky_Moe_13167's avatar
Dicky_Moe_13167
Icon for Nimbostratus rankNimbostratus
Aug 31, 2017

Universal persistence: session-id inserted in HTTP Header

Hello Guys,

Well, the title pretty much explains it. I have a webservice that returns a session-id in the header, and I would like to use that session id to make the next HTTP request persist on the node that returned that id.

After surfing a lot, reading articles and posts and answers etc, I came up with this irule :

when HTTP_REQUEST {
  if { [HTTP::header exists Session-ID] } {
    set sessionid [HTTP::header value Session-ID]
    persist uie $sessionid
  }
}

However, it is not working. I'm testing this with curl, providing the session-id returned in the HTTP response, and in the second request (using the session ID provided) I hit some different server.

The first request:

curl -i -X POST 'http://10.10.19.10/blablalba' -H 'cache-control: no-cache' -H 'content-type: application/json' -H 'conversation-id: blablabal' -H 'message-id: 63770dd6-68e7-4b8b-9647-948837593120' -d '{"calculationCriteria": {"recordLocator": "BLABLA"}}'

The headers in the response:

HTTP/1.1 200 OK
via: insertA
Date: Thu, 31 Aug 2017 22:06:05 GMT
Vary: Accept-Encoding
Server: Apache-Coyote/1.1
Message-ID: 63770dd6-68e7-4b8b-9647-948837593120
Session-ID: 3d0167ba9b0c460ebd845470a49bf9d6

The second request:

curl -i -X GET 'http://10.10.19.10/blablalba' -H 'cache-control: no-cache' -H 'content-type: application/json' -H 'conversation-id: 698f7ff3-e7c0-466b-81e3-185a6c9a88ee' -H 'message-id: 63770dd6-68e7-4b8b-9647-948837593120' -H 'session-id: 3d0167ba9b0c460ebd845470a49bf9d6'

The response:

HTTP/1.1 500 Internal Server Error
Server: Apache-Coyote/1.1
Authorization: Bearer Shared/IDL:IceSess\/SessMgr:1\.0.IDL/Common/!ICESMS\/ACPCRTC!ICESMSLB\/CRT.LB!-3237460263881640826!1205674!0!2
Conversation-ID: 698f7ff3-e7c0-466b-81e3-185a6c9a88ee
Date: Thu, 31 Aug 2017 22:17:33 GMT
Message-ID: 63770dd6-68e7-4b8b-9647-948837593120
Session-ID: 3d0167ba9b0c460ebd845470a49bf9d6
Content-Type: application/json
Transfer-Encoding: chunked
Vary: Accept-Encoding
X-Cnection: close

{"status":"Incomplete","type":"BusinessLogic","errorCode":"ERR.DCCI.APP.BUSINESS_ERROR","timeStamp":"2017-08-31T17:17:33",
"message":"Cannot find cached object for sessionID=3d0167ba9b0c460ebd845470a49bf9d6 in getTransaction"

So, the persistence didn't work. Notice that se session id remains the same in the following requests/responses.

Thoughts ?

Thanks, Fabian

application delivery
BIG-IP
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  • Dicky_Moe_13167's avatar
    Dicky_Moe_13167
    Icon for Nimbostratus rankNimbostratus
    Aug 31, 2017

    I was just looking at the persistence records, and there isn't any record after the 1st request. So that is where the problem is. I need to add a persistence record when the HTTP_RESPONSE event happens.

    So I wrote:

    when HTTP_RESPONSE {
  if { [HTTP::header exists Session-ID] } {
    set sessionid [HTTP::header value Session-ID]
    persist uie $sessionid
  }
}

    But I get this error:

    Failure when receiving data from the peer

  • cjunior's avatar
    cjunior
    Icon for Nacreous rankNacreous
    Aug 31, 2017

    Hi, You need to check first on header responses. You could try like this:

    when HTTP_REQUEST {
    if { [HTTP::header exists Session-ID] } {
        Back to the server
        persist uie [HTTP::header value Session-ID]
    }
}

when HTTP_RESPONSE {
    if { [HTTP::header exists Session-ID] } {
        persist on the server
        persist add uie [HTTP::header value Session-ID]
    }
}

    Regards.