幾個常用的mime type

gif:image/gif
htm:text/html
jpg:image/jpeg
swf:application/x-shockwave-flash
txt:text/plain
xls:application/vnd.ms-excel
doc:application/msword
ppt:application/vnd.ms-powerpoint
wav:audio/x-wav
avi:video/x-msvideo
exe:application/octet-stream
mpg:video/mpeg
mvb:application/x-msmediaview
pdf:application/pdf
zip:application/zip