Why are OPTIONS requests not arriving in my ASP.NET application?
问题 I can't seem to receive HTTP OPTIONS requests in my IIS6 hosted ASP.NET application. I'm testing it using a debug breakpoint (and file-log) in my Global.asax 's Application_BeginRequest method. The breakpoint is never hit and the client gets a HTTP 403 Forbidden, I'm assuming from IIS6 directly ( GET s and POST s work fine btw). I've tried several things in the web.config , including adding the following line to either and both the <system.webServer><handlers> and <system.web><httpHandlers>