Correct Apache AddType directives for font MIME types

Question

I’m using @font-face for embedded fonts (thanks Paul Irish). In trying to fix Chrome’s warning about wrong MIME type for woff fonts, I’ve discovered a mass of conflicting su

Answer 1

I just did some research on IANA official list. This appears to be the current state of the play as at May 2013:

These three are official and assigned by IANA:

• svg as "image/svg+xml"
• woff as "application/font-woff"
• eot as "application/vnd.ms-fontobject"

These are not not official/assigned, and so must use the 'x-' syntax:

• ttf as "application/x-font-ttf"
• otf as "application/x-font-opentype"

It appears that the 'font' type does not exist, so any time type you see 'font/xxx' it is bogus. Possibly 'x-font/xxx' would be allowable, not sure. IIS8 ships with a couple entries like this. Not sure if MS thinks these 'font/xxx' ones are needed for compatibility, or if they just don't read RFCs :-)

The application/font-woff appears new and maybe only official since Jan 2013. So "application/x-font-woff" might be safer/more compatible in the short term.