.Net WebDAV Server

Question

I am looking to implement a WebDAV server in ASP.Net. the app will be deployed to IIS 6. I have seen a few frameworks that provide this functionality, but I can't seem to identify how they're able to accomplish it without (apparently) modifying IIS settings.

My specific question is how do I configure IIS and ASP.Net so that a IHttpModule/IHttpHandler might have an opportunity to handle any of the additional WebDAV verbs (i.e. LOCK, OPTIONS, PROFIND, etc.)

Answer 1

There is no way to configure WebDAV verbs in IIS 6 without modifying IIS settings. It is possible only with IIS 7 and later.

To handle all verbs required by WebDAV in IIS 6 you will need to create an application wildacrd map. Right click on your web application in IIS 6 MMC console and go to Properties->Virtual Directory Tab->Configuration. Click Insert to add new wildcard map.

• Executable - \Microsoft.NET\Framework\<.Net Framework Version>\aspnet_isapi.dll
• Verify that file exists - Unchecked

On Home Directory tab of your application properties set Execute permissions to Scripts only and allow reads.

Here is the web.config example: http://www.webdavsystem.com/server/prev/v2/documentation/hosting_iis_asp_net/webconfig_example

Please note that this web.config example was specifically created and tested with ASP.NET 2.0 on IIS 6 on Server 2003 and IIS 5.1 on XP. It does not handle &, %, + and trailing dots (.).

ASP.NET 4.x provides means for handling any special characters in your WebDAV server, configuring web.config, including &, % and '.'. The web.config that supports IIS versions 6-8 is generated by IT Hit WebDAV Server Engine Wizard.

Answer 2

Check out Geoff Lane's articles on WebDAV:

• http://www.zorched.net/2006/01/20/aspnet-web-application-without-aspx-extension/ - shows configuration of verbs in IIS and HttpModule setup.
• http://www.zorched.net/2006/02/02/custom-webdav-server-using-net/
• http://www.zorched.net/2006/03/01/more-webdav-tips-tricks-and-bugs/