ASP.NET File Upload, maxRequestLength

Question

My ASP.NET application is running on IIS6. Today one of our customers encountered an error after trying to upload a file with 35MB of size.

Normally, maxRequestLength is set to 102400 (100MB) in our web.config, so there was something wrong about this issue.

Upon googling, I've noticed maxAllowedContentLength property, clearly denoting that It works on IIS7 (as i've written above, my application is running on iis6).

Strangely, now when a user tries to upload a file, maxAllowedContentLength value is taken into consideration and not maxRequestLength.

Using maxAllowedContentLength has solved my issue, but I'm kinda confused about how it worked. (IIS version difference) Any idea about how this has worked?

Are you sure It's not a framework question ?

f2lollpll
– f2lollpll

2012-02-15 19:35:49 +00:00
Commented Feb 15, 2012 at 19:35 — f2lollpll
– f2lollpll, Commented Feb 15, 2012 at 19:35
umm Yeah? Somehow maxRequestLength is getting by-passed.

OzanYukruk
– OzanYukruk

2012-02-15 19:39:09 +00:00
Commented Feb 15, 2012 at 19:39 — OzanYukruk
– OzanYukruk, Commented Feb 15, 2012 at 19:39

Giorgio Minardi · Accepted Answer · 2012-02-15 19:42:26Z

2

that's a strange behaviour, as you said if you're using IIS6 the correct setting to edit is maxRequestLength , btw consider that this is present in the machine.config as well. Also, the executionTimeOut (and incidently the maxRequestLength) is ignored when you're in debug mode.

answered Feb 15, 2012 at 19:42

Giorgio Minardi

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3 Comments

OzanYukruk Over a year ago

Yeah, at first when i was in debug mode everything seemed ok. But then I was able to pinpoint the issue at live. The only thing I can think of is, we're using telerik's radUpload component, and previous developers have assigned both the httpHandler and httpModule of it both in <system.web> and <system.WebServer>

OzanYukruk Over a year ago

Now that I think of it, compilation debug is set to true in our application. So both the executionTimeOut and maxRequestLength is ignored. So It should take 4MB as default maxRequestLength, but I'm pretty sure they've been uploading files between 10-20 MB. Now things got more complicated.

OzanYukruk Over a year ago

Found that aswell, default maxAllowedContentLength is 28.6MB it says, now things are clear. Thanks for reminding me about compilation mode.

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