Increase max url length in Azure Websites?

Question

I have a web.config with the following lines:

 <requestFiltering>
     <requestLimits maxUrl="25000" maxQueryString="25000"></requestLimits>
 </requestFiltering>

This lets me access urls up to 25k characters including query string. However, when I publish to an Azure website it completely disregards this specific part of my web.config, but I can't find any kind of limits published by Microsoft.

Anyone know what's going on?

Answer 1

You can find the detailed overview of Request Limits in this Azure doc

This can be happening either due to ASP.NET Runtime or IIS Requests Filtering module. By default, the maximum allowed length for a query string is 2048 ref: link and Internet Explorer You should set the appropriate values in your Web.config, under the requestLimits subnodes.

Even if you set a big value for maximum query string, there is a limit for each browser which is handling the url and the query string. This not available in IIS 6 or in IIS 7 app pools running in classic mode.