C＃Web Api长网址无法正常工作

Question

I have the following web API url which is not working

www.localproject.com:843/api/user/validate/eyJhbGciOiJodHRwOi8vd3d3LnczLm9yZy8yMDAxLzA0L3htbGRzaWctbW9yZSNobWFjLXNoYTI1NiIsInR5cCI6IkpXVCJ9eyJ0ZW1wVXJsIjoie1wiQ3VzdG9tZXJJZFwiOjEsXCJDb3Vyc2VJZFwiOjEsXCJUb2tlblwiOm51bGwsXCJFeHBpcnlcIjpcIjIwMTgtMDQtMThUMTc6MzU6MTMuOTQ2MjM2NCswNTowMFwifSJ9uvm7jZ3us5UFa1hqh4bod2cSamcxF2rRUbfxs7DHQs

whenever I hit the above url It gives me following error

Bad Request - Invalid URL

HTTP Error 400. The request URL is invalid.

I updated my web.config to this as well but still not working.

 <httpRuntime targetFramework="4.6.1" maxRequestLength="20480" maxUrlLength="6144" relaxedUrlToFileSystemMapping="true" />

I also tried editing registry but no luck.

How to allow long url using web api?

Answer 1

By default, HTTP.sys permits 255 segments at a maximum length of 260 characters each. That 260 character limit is why you are seeing this issue.

To fix this you need to make a registry change. Navigate to: HKEY_LOCAL_MACHINE\\SYSTEM\\CurrentControlSet\\Services\\HTTP\\Parameters

Add a DWORD value named UrlSegmentMaxLength and set its value to something like 500 or say 1000.

While you can probably avoid reboot by restarting the HTTP System Service thru command line is a possibility "net stop http" and "net start http", but because several other services depend upon this service like WWW, Print Spooler, SSDP Discovery etc. I will still recommend rebooting the server.