Log current page url with NLog

Question

I'm trying to log the current pages URL as part of our NLog layout. I've scoured the NLog layout variables and have come up with nothing.

Does anyone know how to get the current page URL as a variable for the layout? Also is it possible just to extract the domain name so this can be used in the EventLog source attribute?

Follow up: I used ${aspnet-request:serverVariable=SERVER_NAME} to get the domain — Mike737, Sep 07 '11 at 22:55

ccellar · Accepted Answer · 2014-07-30T13:05:42.440

18

Use the Aspnet-request layout renderer.

<target xsi:type="Trace" 
            name="trace" 
          layout="${message} ${aspnet-request:serverVariable=Url}" />

You have full access to the request properties.

edited Jul 30 '14 at 13:05

answered Sep 02 '11 at 18:53

ccellar

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Does not log the query string – jjxtra Oct 12 '12 at 21:58
@PsychoDad see other URL variables at http://msdn.microsoft.com/en-us/library/ms524602.aspx – Danny Varod Jan 01 '13 at 11:39
this approach will return only URL without query string. Maybe NLog version matters what works as of today... – Pawel Cioch Oct 22 '13 at 22:19
Here you have the list of the server variables: http://msdn.microsoft.com/en-us/library/ms524602.aspx – Jonas Mar 26 '14 at 10:08

Pawel Cioch · Answer 2 · 2014-09-04T16:08:32.060

8

I tested many approached and only "item" seems to work in regards to http://msdn.microsoft.com/en-us/library/ms524602.aspx

method = ${aspnet-request:item=HTTP_METHOD}

url with query string = ${aspnet-request:item=HTTP_URL}

user agent / browser = ${aspnet-request:item=HTTP_USER_AGENT}

and so on...

UPDATE

Additionally to my answer above (I don't remember if I knew it back then or not) but I found somewhere (also don't remember where, was a while ago) that NLog.Extended.dll must be also referenced to use functionality relevant to ASP.NET logging ie. layouts with ${aspnet-...

edited Sep 04 '14 at 16:08

answered Oct 22 '13 at 22:18

Pawel Cioch

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Further to this. You will also need to have NLog.Web installed, too. – Lee Taylor Jun 27 '20 at 15:53

score 4 · Answer 3 · answered Nov 06 '20 at 14:18

Answer for .NET Core as I tried the above before finding that the above does not work for .NET Core

THE FOLLOWING DO NOT WORK FOR .NET CORE

${aspnet-request:serverVariable=Url}
${aspnet-request:item=HTTP_URL}

Instead use:

${aspnet-request-url}
${aspnet-request-querystring}

e.g.

    <target name="jsonFile" xsi:type="File" fileName="log.json" archiveNumbering="DateAndSequence" archiveAboveSize="5000000" maxArchiveFiles="10">
      <layout xsi:type="JsonLayout">
        <attribute name="time" layout="${longdate}" />
        <attribute name="level" layout="${level:upperCase=true}"/>
        <attribute name="message" layout="${message}" />
        <attribute name="exception" layout="${exception:format=ToString,StackTrace:maxInnerExceptionLevel=2}" />
        <attribute name="machineName" layout="${machinename}" />
        <attribute name="ip" layout="${aspnet-request-ip}" />
        <attribute name="method" layout="${aspnet-request-method}" />
        <attribute name="url" layout="${aspnet-request-url}" />
        <attribute name="query" layout="${aspnet-request-querystring}" />
        <attribute name="postedBody" layout="${aspnet-request-posted-body}" />
        <attribute name="userAgent" layout="${aspnet-request-useragent}" />
      </layout>
    </target>

For more see: https://nlog-project.org/config/?tab=layout-renderers&search=package:nlog.web.aspnetcore

Log current page url with NLog

3 Answers3