IIS 设置文件可上载
IIS遇到了文件不能下载的问题.为了让IIS能下载扩展名是INI的文件，我们需要如此操作：（括号内的是英文版本的名字）
打开“IIS管理器（InternetInformationServices(IIS)Manager）”
选择到你的站点。单击右键。选择“属性（Properties）”
单击“HTTP头（HTTPHeaders）”选项卡
单击“MIME类型（MIMETypes）”
单击“新建(NEW)”
在“扩展名（Extension）”框中，输入文件扩展名，这里是ini
在“MIME类型（MIMETypes）”框中，输入该扩展名的说明。这里输入的是application/octet-stream
解释一下：
MIMETypes中输入application/octet-stream的目的是为了让IIS把INI文件当作是EXE那样，出现下载的提示。
否则的话是出现404的提示或是直接在浏览器中把内容给显示出来了。都不能达到我们的目的。
=================
另附mime的所有类型
file type
MIME type
ai
application/postscript
aif
audio/x-aiff
aifc
audio/x-aiff
aiff
audio/x-aiff
asc
text/plain
atom
application/atom+xml
au
audio/basic
avi
video/x-msvideo
bcpio
application/x-bcpio
bin
application/octet-stream
bmp
image/bmp
cdf
application/x-netcdf
cgm
image/cgm
class
application/octet-stream
cpio
application/x-cpio
cpt
application/mac-compactpro
csh
application/x-csh
css
text/css
dcr
application/x-director
dif
video/x-dv
dir
application/x-director
djv
image/vnd.djvu
djvu
image/vnd.djvu
dll
application/octet-stream
dmg
application/octet-stream
dms
application/octet-stream
doc
application/msword
dtd
application/xml-dtd
dv
video/x-dv
dvi
application/x-dvi
dxr
application/x-director
eps
application/postscript
etx
text/x-setext
exe
application/octet-stream
ez
application/andrew-inset
gif
image/gif
gram
application/srgs
grxml
application/srgs+xml
gtar
application/x-gtar
hdf
application/x-hdf
hqx
application/mac-binhex40
htm
text/html
html
text/html
ice
x-conference/x-cooltalk
ico
image/x-icon
ics
text/calendar
ief
image/ief
ifb
text/calendar
iges
model/iges
igs
model/iges
jnlp
application/x-java-jnlp-file
jp2
image/jp2
jpe
image/jpeg
jpeg
image/jpeg
jpg
image/jpeg
js
application/x-javascript
kar
audio/midi
latex
application/x-latex
lha
application/octet-stream
lzh
application/octet-stream
m3u
audio/x-mpegurl
m4a
audio/mp4a-latm
m4b
audio/mp4a-latm
m4p
audio/mp4a-latm
m4u
video/vnd.mpegurl
m4v
video/x-m4v
mac
image/x-macpaint
man
application/x-troff-man
mathml
application/mathml+xml
me
application/x-troff-me
mesh
model/mesh
mid
audio/midi
midi
audio/midi
mif
application/vnd.mif
mov
video/quicktime
movie
video/x-sgi-movie
mp2
audio/mpeg
mp3
audio/mpeg
mp4
video/mp4
mpe
video/mpeg
mpeg
video/mpeg
mpg
video/mpeg
mpga
audio/mpeg
ms
application/x-troff-ms
msh
model/mesh
mxu
video/vnd.mpegurl
nc
application/x-netcdf
oda
application/oda
ogg
application/ogg
pbm
image/x-portable-bitmap
pct
image/pict
pdb
chemical/x-pdb
pdf
application/pdf
pgm
image/x-portable-graymap
pgn
application/x-chess-pgn
pic
image/pict
pict
image/pict
png
image/png
pnm
image/x-portable-anymap
pnt
image/x-macpaint
pntg
image/x-macpaint
ppm
image/x-portable-pixmap
ppt
application/vnd.ms-powerpoint
ps
application/postscript
qt
video/quicktime
qti
image/x-quicktime
qtif
image/x-quicktime
ra
audio/x-pn-realaudio
ram
audio/x-pn-realaudio
ras
image/x-cmu-raster
rdf
application/rdf+xml
rgb
image/x-rgb
rm
application/vnd.rn-realmedia
roff
application/x-troff
rtf
text/rtf
rtx
text/richtext
sgm
text/sgml
sgml
text/sgml
sh
application/x-sh
shar
application/x-shar
silo
model/mesh
sit
application/x-stuffit
skd
application/x-koan
skm
application/x-koan
skp
application/x-koan
skt
application/x-koan
smi
application/smil
smil
application/smil
snd
audio/basic
so
application/octet-stream
spl
application/x-futuresplash
src
application/x-wais-source
sv4cpio
application/x-sv4cpio
sv4crc
application/x-sv4crc
svg
image/svg+xml
swf
application/x-shockwave-flash
t
application/x-troff
tar
application/x-tar
tcl
application/x-tcl
tex
application/x-tex
texi
application/x-texinfo
texinfo
application/x-texinfo
tif
image/tiff
tiff
image/tiff
tr
application/x-troff
tsv
text/tab-separated-values
txt
text/plain
ustar
application/x-ustar
vcd
application/x-cdlink
vrml
model/vrml
vxml
application/voicexml+xml
wav
audio/x-wav
wbmp
image/vnd.wap.wbmp
wbmxl
application/vnd.wap.wbxml
wml
text/vnd.wap.wml
wmlc
application/vnd.wap.wmlc
wmls
text/vnd.wap.wmlscript
wmlsc
application/vnd.wap.wmlscriptc
wrl
model/vrml
xbm
image/x-xbitmap
xht
application/xhtml+xml
xhtml
application/xhtml+xml
xls
application/vnd.ms-excel
xml
application/xml
xpm
image/x-xpixmap
xsl
application/xml
xslt
application/xslt+xml
xul
application/vnd.mozilla.xul+xml
xwd
image/x-xwindowdump
xyz
chemical/x-xyz
zip
application/zip