topic Re: Data collector for fetching http request properties in Splunk AppDynamics

Data collector for fetching http request properties

Mattias_Wessman — Tue, 17 Nov 2020 08:23:07 GMT

Hi!

I would like to fetch HTTP request properties (not headers, not parameters) - according to attached picture; like RawUrl, UrlReferrer, or any other HTTP request property. Looking into transaction snapshots -> any given segment -> More -> Properties they're all there - but how do I go about creating a data collector for fetching any of these properties? Been looking into https://docs.appdynamics.com/display/PRO45/Using+Getter+Chains which seemed promising, and thinking about method invocation data collectors - but haven't really succeeded yet.

Anyone been able to create a data collector fetching HTTP request properties?

Thanks!

/Mattias

Re: Data collector for fetching http request properties

Joshua_Lyons — Tue, 17 Nov 2020 21:12:33 GMT

Hi Mattias,

Here is an MIDC example to get the UrlReferrer property of the Request in an MVC app. You would use the Invoked Object and a Getter Chain that simply uses the Request object and any property.

Re: Data collector for fetching http request properties

Mattias_Wessman — Wed, 18 Nov 2020 09:17:29 GMT

Thank you very much! Will give it a shot right away 🙂

Re: Data collector for fetching http request properties

Mattias_Wessman — Wed, 18 Nov 2020 09:24:29 GMT

Method signature? Guess it depends on the application? Examples:

Re: Data collector for fetching http request properties

Mattias_Wessman — Wed, 18 Nov 2020 10:05:34 GMT

Ended up fetching HTTPContext from System.Web.UI.Page.ProcessRequest - and Request is a property of the context:

Re: Data collector for fetching http request properties

Mattias_Wessman — Wed, 18 Nov 2020 12:38:19 GMT

Unfortunately no data is being collected based on System.Web.UI.Page.ProcessRequest (https://docs.microsoft.com/en-us/dotnet/api/system.web.ui.page.processrequest?view=netframework-4.8#System_Web_UI_Page_ProcessRequest_System_Web_HttpContext_) - Parameter @ index 0 = HttpContext, fetching property Request from HttpContext and UrlReferrer from Request.

Am I missing something?

Re: Data collector for fetching http request properties

Joshua_Lyons — Wed, 18 Nov 2020 13:02:30 GMT

In your case you will need to add the fully qualified path which includes the Current context like so:

ParamIndex_0.Current.Request.UrlReferrer

You can read about why in the Remarks here in the Microsoft docs. https://docs.microsoft.com/en-us/dotnet/api/system.web.httpcontext.request?view=netframework-4.8#remarks

Unfortunately, I am not on my dev machine to confirm this as I normally would but if my memory serves me, this should get you the results you need.

Re: Data collector for fetching http request properties

Mattias_Wessman — Thu, 19 Nov 2020 07:43:51 GMT

Unfortunately I can't get my data collector to pick up any HTTP request properties. Using Current.Request.UrlReferrer, also tried Request.UrlReferrer etc. Either I'm doing something wrong, or I've stumbled upon a bug! Any advice would be highly appreciated.

Re: Data collector for fetching http request properties

Mattias_Wessman — Mon, 07 Dec 2020 16:42:34 GMT

Weren't able to get the MIDC working - therefore fetched HTTP header Referer instead as a workaround.