How do I get server variables (or at least client IP address) in C# in Elmah's ErrorMail_Mailing event when HttpContext.Current is null?

Question

I am working on some error handling code and I want to determine if its a local connection (developer) or not. Typically I look at HttpContext.Current.Request.ServerVariables however in the error handling code if authentication expired HttpContext.Current is null.

When HttpContext.Current is null, how do I go about getting the server variables--or at least the IP address of the client that kicked off the request--so I can determine if its a developer on their own local server or not.

UPDATE: I was able to retrieve the relevant server variables in the ErrorMailEventArgs parameter passed in by elmah, specifically errorMailEventArgs.Error.ServerVariables.

When (in terms of page lifecycle) and where are you trying to do the error handling? I'm just wondering what would cause HttpContext.Current to be null in the first place. — rsbarro
– rsbarro, Commented Apr 7, 2011 at 20:16
The request triggers an error caught by ELMAH which finishes the response but then in another thread ELMAH continues to process the error and send out the e-mail. — Aaron Silverman
– Aaron Silverman, Commented Apr 7, 2011 at 21:35
OK, so in what part of that process are you trying to access the ServerVariables, when ELMAH catches the error or when it goes to process the error and send out the email? — rsbarro
– rsbarro, Commented Apr 7, 2011 at 22:10
@rsbarro trying to access in the ErrorMail_Mailing module call--which is preprocessing done right before sending out the e-mail — Aaron Silverman
– Aaron Silverman, Commented Apr 8, 2011 at 20:02

Aaron Silverman · Accepted Answer · 2011-04-07 22:16:55Z

1

I was able to retrieve the relevant server variables in the ErrorMailEventArgs parameter passed in by elmah, specifically errorMailEventArgs.Error.ServerVariables.

answered Apr 7, 2011 at 22:16

Aaron Silverman

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5 Comments

rsbarro Over a year ago

Nice! I think this issue occurs because HttpContext.Current is not available on background threads (please note I haven't verified this myself). See the accepted answer to this question, it indicates the same thing: stackoverflow.com/questions/2638345/…

Aaron Silverman Over a year ago

Great link rsbarro, this is exactly what is going on

rsbarro Over a year ago

Cool, do you want me to post that comment as an answer?

Aaron Silverman Over a year ago

Its cool I will just accept this one as it contains both what you do and the reason why, which should hopefully help out others with same question. Thanks!

rsbarro Over a year ago

OK, sounds good. Was just asking because I saw you hadn't accepted your answer earlier. Glad you were able to figure out what was going on.

Sam Axe · Accepted Answer · 2011-04-07 20:16:02Z

0

The Request object should get you the requesting IP.

answered Apr 7, 2011 at 20:16

Sam Axe

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score 0 · Accepted Answer · 2011-04-07 22:30:51Z

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The request object has these properties:

Request.UserHostAddress

MSDN Link

edited Apr 7, 2011 at 22:30

answered Apr 7, 2011 at 20:18

user342706

2 Comments

Aaron Silverman Over a year ago

System.Web.HttpRequest doesn't have any static methods and I don't have a page object in Elmah Error land :(

user342706 Over a year ago

It not a static method. Here is the MSDN page for reference. msdn.microsoft.com/en-us/library/system.web.httprequest.aspx

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