文件后缀与文件类型对照表:
chm=application/octet-stream
ppt=application/vnd.ms-powerpoint
xls=application/vnd.ms-excel
doc=application/msword
exe=application/octet-stream
rar=application/octet-stream
js=javascript/js
css=text/css
hqx=application/mac-binhex40
bin=application/octet-stream
oda=application/oda
pdf=application/pdf
ai=application/postsrcipt
eps=application/postsrcipt
es=application/postsrcipt
rtf=application/rtf
mif=application/x-mif
csh=application/x-csh
dvi=application/x-dvi
hdf=application/x-hdf
nc=application/x-netcdf
cdf=application/x-netcdf
latex=application/x-latex
ts=application/x-troll-ts
src="/application/x-wais-source"
zip=application/zip
bcpio=application/x-bcpio
cpio=application/x-cpio
gtar=application/x-gtar
shar=application/x-shar
sv4cpio=application/x-sv4cpio
sv4crc=application/x-sv4crc
tar=application/x-tar
ustar=application/x-ustar
man=application/x-troff-man
sh=application/x-sh
tcl=application/x-tcl
tex=application/x-tex
texi=application/x-texinfo
texinfo=application/x-texinfo
t=application/x-troff
tr=application/x-troff
roff=application/x-troff
shar=application/x-shar
me=application/x-troll-me
ts=application/x-troll-ts
gif=image/gif
jpeg=image/pjpeg
jpg=image/pjpeg
jpe=image/pjpeg
ras=image/x-cmu-raster
pbm=image/x-portable-bitmap
ppm=image/x-portable-pixmap
xbm=image/x-xbitmap
xwd=image/x-xwindowdump
ief=image/ief
tif=image/tiff
tiff=image/tiff
pnm=image/x-portable-anymap
pgm=image/x-portable-graymap
rgb=image/x-rgb
xpm=image/x-xpixmap
txt=text/plain
c=text/plain
cc=text/plain
h=text/plain
html=text/html
htm=text/html
htl=text/html
rtx=text/richtext
etx=text/x-setext
tsv=text/tab-separated-values
swf=application/x-shockwave-flash
mpeg=video/mpeg
mpg=video/mpeg
mpe=video/mpeg
avi=video/x-msvideo
qt=video/quicktime
mov=video/quicktime
moov=video/quicktime
movie=video/x-sgi-movie
au=audio/basic
snd=audio/basic
wav=audio/x-wav
aif=audio/x-aiff
aiff=audio/x-aiff
aifc=audio/x-aiff