If you need to add (or edit) a mime type entry stored in IIS configuration files, you have a few tools that you can use.
First off, and this is by far the easiest way, you can leverage the IIS Manager.
- Open inetmgr.exe
- Select the “scope”
- Select the Mime Types feature
- Edit an existing entry or add a new one by clicking the “Add..” action in the right pane
Of course, if you need to automate these settings, the graphical UI is not the tool of your choice.
You could, instead, use scripting, either leveraging the appcmd console application that is part of the IIS management tools, or writing a couple of lines of code (PowerShell, why not?).
The approach I prefer is using appcmd, which is not so complicated indeed.
For example, here I’m registerint the video/mp4 mime type for the .mp4 extemsion (type the following command in a single line, here you may find line breaks for reading convenience):
appcmd.exe set config “Default Web Site” -section:system.webServer/staticContent /+”[fileExtension=’mp4′,mimeType=video/mp4]”