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| IIB10: Mon Profile - what is xpath to get http input header? |
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| john.ormerod |
 Posted: Wed Dec 23, 2020 7:53 am Post subject: IIB10: Mon Profile - what is xpath to get http input header? |
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Apprentice
Joined: 14 Feb 2017
Posts: 49
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Hello
I have added an http header to Postman to simulate a Global Txn Id coming from DataPower.
| Code: |
| X-Global-Transaction-ID : 7c4b7c375fe313c400001d50 |
In my Mon Profile, for the HTTP input node 'TxnStart', I want this header to be the Global Txn Id. However, this xpath doesn't work:
| Code: |
<p:globalTransactionId p:queryText='$Root/HTTPInputHeader/X-Global-Transaction-ID' p:sourceOfId='query'/>
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Unfortunately, in the Mon Event msgs, the Global Txn Id is empty.
What do I need to specify in the Mon Profile?
I've searched and searched for an example for an HTTP Input Header without success.
The Flow Exerciser shows it to be present
| Code: |
<HTTPInputHeader>
<X-Original-HTTP-Command>POST http://localhost:7080/HTTPInputMessageFlow HTTP/1.1</X-Original-HTTP-Command>
<X-Global-Transaction-Id>7c4b7c375fe313c400001d50</X-Global-Transaction-Id>
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i've looked hard for typos and differing case as the cause, but, naturally, I can't see any.
Grateful for any words of wisdom. |
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| abhi_thri |
| Posted: Thu Dec 24, 2020 12:09 am Post subject: |
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Knight
Joined: 17 Jul 2017
Posts: 516
Location: UK
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hi...must admit that i haven't touched xpaths in a while, just wondering whether the it is the hypens in
| Code: |
| X-Global-Transaction-ID |
that is causing the issue and whether it need to be escaped |
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| fjb_saper |
| Posted: Sat Dec 26, 2020 9:57 am Post subject: |
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Grand High Poobah
Joined: 18 Nov 2003
Posts: 20756
Location: LI,NY
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| abhi_thri wrote: |
hi...must admit that i haven't touched xpaths in a while, just wondering whether the it is the hypens in
| Code: |
| X-Global-Transaction-ID |
that is causing the issue and whether it need to be escaped |
And here I thought that HTTP / HTTPS did not support a global transaction... 
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MQ & Broker admin |
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| rekarm01 |
| Posted: Sun Dec 27, 2020 11:27 am Post subject: Re: IIB10: Mon Profile - what is xpath to get http input hea |
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Grand Master
Joined: 25 Jun 2008
Posts: 1415
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| john.ormerod wrote: |
| i've looked hard for typos and differing case as the cause, but, naturally, I can't see any. |
So, is that an uppercase "...-ID"?
| john.ormerod wrote: |
| Code: |
| X-Global-Transaction-ID : 7c4b7c375fe313c400001d50 |
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Or is it a mixed case "...-Id"?
| john.ormerod wrote: |
| Code: |
<HTTPInputHeader>
<X-Original-HTTP-Command>POST http://localhost:7080/HTTPInputMessageFlow HTTP/1.1</X-Original-HTTP-Command>
<X-Global-Transaction-Id>7c4b7c375fe313c400001d50</X-Global-Transaction-Id> |
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If that is not the issue, then try adding a Trace node to display the parsed header, to compare with the desired XPath.
| abhi_thri wrote: |
| just wondering whether the it is the hypens |
The only constraint is that the name can't start with a hyphen. |
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| john.ormerod |
| Posted: Wed Jan 06, 2021 1:57 am Post subject: |
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Apprentice
Joined: 14 Feb 2017
Posts: 49
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Thanks rekarm01
You have spotted what I didn't see: '-Id' (as copied from the Flow Exerciser data) instead of '-ID'. Now I know where to look. It's either my mistake in Postman or IIB has made an executive decision and changed '-ID' to '-Id'.
Let me offer a Happy New Year in addition to my thanks.
As I segued from WAH to HAH, I will resolved in a week's time when my 'holiday' segues back to WAH.
Best regards, John |
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| john.ormerod |
| Posted: Sun Jan 10, 2021 4:32 am Post subject: |
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Apprentice
Joined: 14 Feb 2017
Posts: 49
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Resolved:
For a user-defined ('X-Xxx') incoming HTTP header, IIB changes the case of the letters after the final '-' to be: 'Uxxx' (i.e first letter is upper case, the rest are lower case.
For example, if the incoming header ends with '-xSPqR', it will be seen by the HTTP Input node as: '-Xspqr'.
Can anyone explain why IIB takes it upon itself to make this change? |
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