HTTP Error 400. The size of the request headers is too long.

ilich / MvcReportViewer

ASP.NET MVC Html Helpers for ReportViewer Control.

MIT License

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HTTP Error 400. The size of the request headers is too long. #219

Closed vivekcpatel closed 6 years ago

vivekcpatel commented 6 years ago

Hi, I updated the nuget package on my project. I also set the KeepSessionAlive="true". But I am still getting this error. I have attached the sample request. Is there a limit somewhere that i could change to get passed this error? Report Viewer Request.txt

ilich commented 6 years ago

It seems that IIS does not like HTTP header you're sending. e.g. you may send very large cookie, etc. Please check https://forums.asp.net/t/2027961.aspx?HTTP+400+The+size+of+the+request+headers+is+too+long+ recommendations. I hope they will help in your case.

vivekcpatel commented 6 years ago

It was because Referer was added to the request. In my case the whole report parameters request was added as to this Referer tag and it was making the request too long. I removed the referer from the request and it worked. In order to remove this you can add <meta name="referrer" content="no-referrer" /> to the head tag in your .aspx page and it should work after.