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HTTP content-type
Content-Type,内容类型,一般是指网页中存在的Content-Type,用于定义网络文件的类型和网页的编码,决定浏览器将以什么形式、什么编码读取这个文件,这就是经常看到一些Asp网页点击的结果却是下载到的一个文件或一张图片的原因。
HTTP content-type 对照表
文件扩展名 | Content-Type(Mime-Type) | 文件扩展名 | Content-Type(Mime-Type) |
---|---|---|---|
.*( 二进制流,不知道下载文件类型) | application/octet-stream | .tif | image/tiff |
.001 | application/x-001 | .301 | application/x-301 |
.323 | text/h323 | .906 | application/x-906 |
.907 | drawing/907 | .a11 | application/x-a11 |
.acp | audio/x-mei-aac | .ai | application/postscript |
.aif | audio/aiff | .aifc | audio/aiff |
.aiff | audio/aiff | .anv | application/x-anv |
.asa | text/asa | .asf | video/x-ms-asf |
.asp | text/asp | .asx | video/x-ms-asf |
.au | audio/basic | .avi | video/avi |
.awf | application/vnd.adobe.workflow | .biz | text/xml |
.bmp | application/x-bmp | .bot | application/x-bot |
.c4t | application/x-c4t | .c90 | application/x-c90 |
.cal | application/x-cals | .cat | application/vnd.ms-pki.seccat |
.cdf | application/x-netcdf | .cdr | application/x-cdr |
.cel | application/x-cel | .cer | application/x-x509-ca-cert |
.cg4 | application/x-g4 | .cgm | application/x-cgm |
.cit | application/x-cit | .class | java/* |
.cml | text/xml | .cmp | application/x-cmp |
.cmx | application/x-cmx | .cot | application/x-cot |
.crl | application/pkix-crl | .crt | application/x-x509-ca-cert |
.csi | application/x-csi | .css | text/css |
.cut | application/x-cut | .dbf | application/x-dbf |
.dbm | application/x-dbm | .dbx | application/x-dbx |
.dcd | text/xml | .dcx | application/x-dcx |
.der | application/x-x509-ca-cert | .dgn | application/x-dgn |
.dib | application/x-dib | .dll | application/x-msdownload |
.doc | application/msword | .dot | application/msword |
.drw | application/x-drw | .dtd | text/xml |
.dwf | Model/vnd.dwf | .dwf | application/x-dwf |
.dwg | application/x-dwg | .dxb | application/x-dxb |
.dxf | application/x-dxf | .edn | application/vnd.adobe.edn |
.emf | application/x-emf | .eml | message/rfc822 |
.ent | text/xml | .epi | application/x-epi |
.eps | application/x-ps | .eps | application/postscript |
.etd | application/x-ebx | .exe | application/x-msdownload |
.fax | image/fax | .fdf | application/vnd.fdf |
.fif | application/fractals | .fo | text/xml |
.frm | application/x-frm | .g4 | application/x-g4 |
.gbr | application/x-gbr | . | application/x- |
.gif | image/gif | .gl2 | application/x-gl2 |
.gp4 | application/x-gp4 | .hgl | application/x-hgl |
.hmr | application/x-hmr | .hpg | application/x-hpgl |
.hpl | application/x-hpl | .hqx | application/mac-binhex40 |
.hrf | application/x-hrf | .hta | application/hta |
.htc | text/x-component | .htm | text/html |
.html | text/html | .htt | text/webviewhtml |
.htx | text/html | .icb | application/x-icb |
.ico | image/x-icon | .ico | application/x-ico |
.iff | application/x-iff | .ig4 | application/x-g4 |
.igs | application/x-igs | .iii | application/x-iphone |
.img | application/x-img | .ins | application/x-internet-signup |
.isp | application/x-internet-signup | .IVF | video/x-ivf |
.java | java/* | .jfif | image/jpeg |
.jpe | image/jpeg | .jpe | application/x-jpe |
.jpeg | image/jpeg | .jpg | image/jpeg |
.jpg | application/x-jpg | .js | application/x-javascript |
.jsp | text/html | .la1 | audio/x-liquid-file |
.lar | application/x-laplayer-reg | .latex | application/x-latex |
.lavs | audio/x-liquid-secure | .lbm | application/x-lbm |
.lmsff | audio/x-la-lms | .ls | application/x-javascript |
.ltr | application/x-ltr | .m1v | video/x-mpeg |
.m2v | video/x-mpeg | .m3u | audio/mpegurl |
.m4e | video/mpeg4 | .mac | application/x-mac |
.man | application/x-troff-man | .math | text/xml |
.mdb | application/msaccess | .mdb | application/x-mdb |
.mfp | application/x-shockwave-flash | .mht | message/rfc822 |
.mhtml | message/rfc822 | .mi | application/x-mi |
.mid | audio/mid | .midi | audio/mid |
.mil | application/x-mil | .mml | text/xml |
.mnd | audio/x-musicnet-download | .mns | audio/x-musicnet-stream |
.mocha | application/x-javascript | .movie | video/x-sgi-movie |
.mp1 | audio/mp1 | .mp2 | audio/mp2 |
.mp2v | video/mpeg | .mp3 | audio/mp3 |
.mp4 | video/mpeg4 | .mpa | video/x-mpg |
.mpd | application/vnd.ms-project | .mpe | video/x-mpeg |
.mpeg | video/mpg | .mpg | video/mpg |
.mpga | audio/rn-mpeg | .mpp | application/vnd.ms-project |
.mps | video/x-mpeg | .mpt | application/vnd.ms-project |
.mpv | video/mpg | .mpv2 | video/mpeg |
.mpw | application/vnd.ms-project | .mpx | application/vnd.ms-project |
.mtx | text/xml | .mxp | application/x-mmxp |
.net | image/pnetvue | .nrf | application/x-nrf |
.nws | message/rfc822 | .odc | text/x-ms-odc |
.out | application/x-out | .p10 | application/pkcs10 |
.p12 | application/x-pkcs12 | .p7b | application/x-pkcs7-certificates |
.p7c | application/pkcs7-mime | .p7m | application/pkcs7-mime |
.p7r | application/x-pkcs7-certreqresp | .p7s | application/pkcs7-signature |
.pc5 | application/x-pc5 | .pci | application/x-pci |
.pcl | application/x-pcl | .pcx | application/x-pcx |
application/pdf | application/pdf | ||
.pdx | application/vnd.adobe.pdx | .pfx | application/x-pkcs12 |
.pgl | application/x-pgl | .pic | application/x-pic |
.pko | application/vnd.ms-pki.pko | .pl | application/x-perl |
.plg | text/html | .pls | audio/scpls |
.plt | application/x-plt | .png | image/png |
.png | application/x-png | .pot | application/vnd.ms-powerpoint |
.ppa | application/vnd.ms-powerpoint | .ppm | application/x-ppm |
.pps | application/vnd.ms-powerpoint | .ppt | application/vnd.ms-powerpoint |
.ppt | application/x-ppt | .pr | application/x-pr |
.prf | application/pics-rules | .prn | application/x-prn |
.prt | application/x-prt | .ps | application/x-ps |
.ps | application/postscript | .ptn | application/x-ptn |
.pwz | application/vnd.ms-powerpoint | .r3t | text/vnd.rn-realtext3d |
.ra | audio/vnd.rn-realaudio | .ram | audio/x-pn-realaudio |
.ras | application/x-ras | .rat | application/rat-file |
.rdf | text/xml | .rec | application/vnd.rn-recording |
.red | application/x-red | .rgb | application/x-rgb |
.rjs | application/vnd.rn-realsystem-rjs | .rjt | application/vnd.rn-realsystem-rjt |
.rlc | application/x-rlc | .rle | application/x-rle |
.rm | application/vnd.rn-realmedia | .rmf | application/vnd.adobe.rmf |
.rmi | audio/mid | .rmj | application/vnd.rn-realsystem-rmj |
.rmm | audio/x-pn-realaudio | .rmp | application/vnd.rn-rn_music_package |
.rms | application/vnd.rn-realmedia-secure | .rmvb | application/vnd.rn-realmedia-vbr |
.rmx | application/vnd.rn-realsystem-rmx | .rnx | application/vnd.rn-realplayer |
.rp | image/vnd.rn-realpix | .rpm | audio/x-pn-realaudio-plugin |
.rsml | application/vnd.rn-rsml | .rt | text/vnd.rn-realtext |
.rtf | application/msword | .rtf | application/x-rtf |
.rv | video/vnd.rn-realvideo | .sam | application/x-sam |
.sat | application/x-sat | .sdp | application/sdp |
.sdw | application/x-sdw | .sit | application/x-stuffit |
.slb | application/x-slb | .sld | application/x-sld |
.slk | drawing/x-slk | .smi | application/smil |
.smil | application/smil | .smk | application/x-smk |
.snd | audio/basic | .sol | text/plain |
.sor | text/plain | .spc | application/x-pkcs7-certificates |
.spl | application/futuresplash | .spp | text/xml |
.ssm | application/streamingmedia | .sst | application/vnd.ms-pki.certstore |
.stl | application/vnd.ms-pki.stl | .stm | text/html |
.sty | application/x-sty | .svg | text/xml |
.swf | application/x-shockwave-flash | .tdf | application/x-tdf |
.tg4 | application/x-tg4 | .tga | application/x-tga |
.tif | image/tiff | .tif | application/x-tif |
.tiff | image/tiff | .tld | text/xml |
.top | drawing/x-top | .torrent | application/x-bittorrent |
.tsd | text/xml | .txt | text/plain |
.uin | application/x-icq | .uls | text/iuls |
.vcf | text/x-vcard | .vda | application/x-vda |
.vdx | application/vnd.visio | .vml | text/xml |
.vpg | application/x-vpeg005 | .vsd | application/vnd.visio |
.vsd | application/x-vsd | .vss | application/vnd.visio |
.vst | application/vnd.visio | .vst | application/x-vst |
.vsw | application/vnd.visio | .vsx | application/vnd.visio |
.vtx | application/vnd.visio | .vxml | text/xml |
.wav | audio/wav | .wax | audio/x-ms-wax |
.wb1 | application/x-wb1 | .wb2 | application/x-wb2 |
.wb3 | application/x-wb3 | .wbmp | image/vnd.wap.wbmp |
.wiz | application/msword | .wk3 | application/x-wk3 |
.wk4 | application/x-wk4 | .wkq | application/x-wkq |
.wks | application/x-wks | .wm | video/x-ms-wm |
.wma | audio/x-ms-wma | .wmd | application/x-ms-wmd |
.wmf | application/x-wmf | .wml | text/vnd.wap.wml |
.wmv | video/x-ms-wmv | .wmx | video/x-ms-wmx |
.wmz | application/x-ms-wmz | .wp6 | application/x-wp6 |
.wpd | application/x-wpd | .wpg | application/x-wpg |
.wpl | application/vnd.ms-wpl | .wq1 | application/x-wq1 |
.wr1 | application/x-wr1 | .wri | application/x-wri |
.wrk | application/x-wrk | .ws | application/x-ws |
.ws2 | application/x-ws | .wsc | text/scriptlet |
.wsdl | text/xml | .wvx | video/x-ms-wvx |
.xdp | application/vnd.adobe.xdp | .xdr | text/xml |
.xfd | application/vnd.adobe.xfd | .xfdf | application/vnd.adobe.xfdf |
.xhtml | text/html | .xls | application/vnd.ms-excel |
.xls | application/x-xls | .xlw | application/x-xlw |
.xml | text/xml | .xpl | audio/scpls |
.xq | text/xml | .xql | text/xml |
.xquery | text/xml | .xsd | text/xml |
.xsl | text/xml | .xslt | text/xml |
.xwd | application/x-xwd | .x_b | application/x-x_b |
.sis | application/vnd.symbian.install | .sisx | application/vnd.symbian.install |
.x_t | application/x-x_t | .ipa | application/vnd.iphone |
.apk | application/vnd.android.package-archive | .xap | application/x-silverlight-app |
MIME 类型
MIME (Multipurpose Internet Mail Extensions) 是描述消息内容类型的因特网标准。
MIME 消息能包含文本、图像、音频、视频以及其他应用程序专用的数据。
官方的 MIME 信息是由 Internet Engineering Task Force (IETF) 在下面的文档中提供的:
- RFC-822 Standard for ARPA Internet text messages
- RFC-2045 MIME Part 1: Format of Internet Message Bodies
- RFC-2046 MIME Part 2: Media Types
- RFC-2047 MIME Part 3: Header Extensions for Non-ASCII Text
- RFC-2048 MIME Part 4: Registration Procedures
- RFC-2049 MIME Part 5: Conformance Criteria and Examples
不同的应用程序支持不同的 MIME 类型。
下面的参考手册是由 Microsoft Internet Information Server version 5 所支持的 MIME 类型列表。
按照内容类型排列的 Mime 类型列表
类型/子类型 | 扩展名 |
---|---|
application/envoy | evy |
application/fractals | fif |
application/futuresplash | spl |
application/hta | hta |
application/internet-property-stream | acx |
application/mac-binhex40 | hqx |
application/msword | doc |
application/msword | dot |
application/octet-stream | * |
application/octet-stream | bin |
application/octet-stream | class |
application/octet-stream | dms |
application/octet-stream | exe |
application/octet-stream | lha |
application/octet-stream | lzh |
application/oda | oda |
application/olescript | axs |
application/pdf | |
application/pics-rules | prf |
application/pkcs10 | p10 |
application/pkix-crl | crl |
application/postscript | ai |
application/postscript | eps |
application/postscript | ps |
application/rtf | rtf |
application/set-payment-initiation | setpay |
application/set-registration-initiation | setreg |
application/vnd.ms-excel | xla |
application/vnd.ms-excel | xlc |
application/vnd.ms-excel | xlm |
application/vnd.ms-excel | xls |
application/vnd.ms-excel | xlt |
application/vnd.ms-excel | xlw |
application/vnd.ms-outlook | msg |
application/vnd.ms-pkicertstore | sst |
application/vnd.ms-pkiseccat | cat |
application/vnd.ms-pkistl | stl |
application/vnd.ms-powerpoint | pot |
application/vnd.ms-powerpoint | pps |
application/vnd.ms-powerpoint | ppt |
application/vnd.ms-project | mpp |
application/vnd.ms-works | wcm |
application/vnd.ms-works | wdb |
application/vnd.ms-works | wks |
application/vnd.ms-works | wps |
application/winhlp | hlp |
application/x-bcpio | bcpio |
application/x-cdf | cdf |
application/x-compress | z |
application/x-compressed | tgz |
application/x-cpio | cpio |
application/x-csh | csh |
application/x-director | dcr |
application/x-director | dir |
application/x-director | dxr |
application/x-dvi | dvi |
application/x-gtar | gtar |
application/x-gzip | gz |
application/x-hdf | hdf |
application/x-internet-signup | ins |
application/x-internet-signup | isp |
application/x-iphone | iii |
application/x-javascript | js |
application/x-latex | latex |
application/x-msaccess | mdb |
application/x-mscardfile | crd |
application/x-msclip | clp |
application/x-msdownload | dll |
application/x-msmediaview | m13 |
application/x-msmediaview | m14 |
application/x-msmediaview | mvb |
application/x-msmetafile | wmf |
application/x-msmoney | mny |
application/x-mspublisher | pub |
application/x-msschedule | scd |
application/x-msterminal | trm |
application/x-mswrite | wri |
application/x-netcdf | cdf |
application/x-netcdf | nc |
application/x-perfmon | pma |
application/x-perfmon | pmc |
application/x-perfmon | pml |
application/x-perfmon | pmr |
application/x-perfmon | pmw |
application/x-pkcs12 | p12 |
application/x-pkcs12 | pfx |
application/x-pkcs7-certificates | p7b |
application/x-pkcs7-certificates | spc |
application/x-pkcs7-certreqresp | p7r |
application/x-pkcs7-mime | p7c |
application/x-pkcs7-mime | p7m |
application/x-pkcs7-signature | p7s |
application/x-sh | sh |
application/x-shar | shar |
application/x-shockwave-flash | swf |
application/x-stuffit | sit |
application/x-sv4cpio | sv4cpio |
application/x-sv4crc | sv4crc |
application/x-tar | tar |
application/x-tcl | tcl |
application/x-tex | tex |
application/x-texinfo | texi |
application/x-texinfo | texinfo |
application/x-troff | roff |
application/x-troff | t |
application/x-troff | tr |
application/x-troff-man | man |
application/x-troff-me | me |
application/x-troff-ms | ms |
application/x-ustar | ustar |
application/x-wais-source | src |
application/x-x509-ca-cert | cer |
application/x-x509-ca-cert | crt |
application/x-x509-ca-cert | der |
application/ynd.ms-pkipko | pko |
application/zip | zip |
audio/basic | au |
audio/basic | snd |
audio/mid | mid |
audio/mid | rmi |
audio/mpeg | mp3 |
audio/x-aiff | aif |
audio/x-aiff | aifc |
audio/x-aiff | aiff |
audio/x-mpegurl | m3u |
audio/x-pn-realaudio | ra |
audio/x-pn-realaudio | ram |
audio/x-wav | wav |
image/bmp | bmp |
image/cis-cod | cod |
image/gif | gif |
image/ief | ief |
image/jpeg | jpe |
image/jpeg | jpeg |
image/jpeg | jpg |
image/pipeg | jfif |
image/svg+xml | svg |
image/tiff | tif |
image/tiff | tiff |
image/x-cmu-raster | ras |
image/x-cmx | cmx |
image/x-icon | ico |
image/x-portable-anymap | pnm |
image/x-portable-bitmap | pbm |
image/x-portable-graymap | pgm |
image/x-portable-pixmap | ppm |
image/x-rgb | rgb |
image/x-xbitmap | xbm |
image/x-xpixmap | xpm |
image/x-xwindowdump | xwd |
message/rfc822 | mht |
message/rfc822 | mhtml |
message/rfc822 | nws |
text/css | css |
text/h323 | 323 |
text/html | htm |
text/html | html |
text/html | stm |
text/iuls | uls |
text/plain | bas |
text/plain | c |
text/plain | h |
text/plain | txt |
text/richtext | rtx |
text/scriptlet | sct |
text/tab-separated-values | tsv |
text/webviewhtml | htt |
text/x-component | htc |
text/x-setext | etx |
text/x-vcard | vcf |
video/mpeg | mp2 |
video/mpeg | mpa |
video/mpeg | mpe |
video/mpeg | mpeg |
video/mpeg | mpg |
video/mpeg | mpv2 |
video/quicktime | mov |
video/quicktime | qt |
video/x-la-asf | lsf |
video/x-la-asf | lsx |
video/x-ms-asf | asf |
video/x-ms-asf | asr |
video/x-ms-asf | asx |
video/x-msvideo | avi |
video/x-sgi-movie | movie |
x-world/x-vrml | flr |
x-world/x-vrml | vrml |
x-world/x-vrml | wrl |
x-world/x-vrml | wrz |
x-world/x-vrml | xaf |
x-world/x-vrml | xof |
按照文件扩展名排列的 Mime 类型列表
扩展名 | 类型/子类型 |
---|---|
application/octet-stream | |
323 | text/h323 |
acx | application/internet-property-stream |
ai | application/postscript |
aif | audio/x-aiff |
aifc | audio/x-aiff |
aiff | audio/x-aiff |
asf | video/x-ms-asf |
asr | video/x-ms-asf |
asx | video/x-ms-asf |
au | audio/basic |
avi | video/x-msvideo |
axs | application/olescript |
bas | text/plain |
bcpio | application/x-bcpio |
bin | application/octet-stream |
bmp | image/bmp |
c | text/plain |
cat | application/vnd.ms-pkiseccat |
cdf | application/x-cdf |
cer | application/x-x509-ca-cert |
class | application/octet-stream |
clp | application/x-msclip |
cmx | image/x-cmx |
cod | image/cis-cod |
cpio | application/x-cpio |
crd | application/x-mscardfile |
crl | application/pkix-crl |
crt | application/x-x509-ca-cert |
csh | application/x-csh |
css | text/css |
dcr | application/x-director |
der | application/x-x509-ca-cert |
dir | application/x-director |
dll | application/x-msdownload |
dms | application/octet-stream |
doc | application/msword |
dot | application/msword |
dvi | application/x-dvi |
dxr | application/x-director |
eps | application/postscript |
etx | text/x-setext |
evy | application/envoy |
exe | application/octet-stream |
fif | application/fractals |
flr | x-world/x-vrml |
gif | image/gif |
gtar | application/x-gtar |
gz | application/x-gzip |
h | text/plain |
hdf | application/x-hdf |
hlp | application/winhlp |
hqx | application/mac-binhex40 |
hta | application/hta |
htc | text/x-component |
htm | text/html |
html | text/html |
htt | text/webviewhtml |
ico | image/x-icon |
ief | image/ief |
iii | application/x-iphone |
ins | application/x-internet-signup |
isp | application/x-internet-signup |
jfif | image/pipeg |
jpe | image/jpeg |
jpeg | image/jpeg |
jpg | image/jpeg |
js | application/x-javascript |
latex | application/x-latex |
lha | application/octet-stream |
lsf | video/x-la-asf |
lsx | video/x-la-asf |
lzh | application/octet-stream |
m13 | application/x-msmediaview |
m14 | application/x-msmediaview |
m3u | audio/x-mpegurl |
man | application/x-troff-man |
mdb | application/x-msaccess |
me | application/x-troff-me |
mht | message/rfc822 |
mhtml | message/rfc822 |
mid | audio/mid |
mny | application/x-msmoney |
mov | video/quicktime |
movie | video/x-sgi-movie |
mp2 | video/mpeg |
mp3 | audio/mpeg |
mpa | video/mpeg |
mpe | video/mpeg |
mpeg | video/mpeg |
mpg | video/mpeg |
mpp | application/vnd.ms-project |
mpv2 | video/mpeg |
ms | application/x-troff-ms |
mvb | application/x-msmediaview |
nws | message/rfc822 |
oda | application/oda |
p10 | application/pkcs10 |
p12 | application/x-pkcs12 |
p7b | application/x-pkcs7-certificates |
p7c | application/x-pkcs7-mime |
p7m | application/x-pkcs7-mime |
p7r | application/x-pkcs7-certreqresp |
p7s | application/x-pkcs7-signature |
pbm | image/x-portable-bitmap |
application/pdf | |
pfx | application/x-pkcs12 |
pgm | image/x-portable-graymap |
pko | application/ynd.ms-pkipko |
pma | application/x-perfmon |
pmc | application/x-perfmon |
pml | application/x-perfmon |
pmr | application/x-perfmon |
pmw | application/x-perfmon |
pnm | image/x-portable-anymap |
pot, | application/vnd.ms-powerpoint |
ppm | image/x-portable-pixmap |
pps | application/vnd.ms-powerpoint |
ppt | application/vnd.ms-powerpoint |
prf | application/pics-rules |
ps | application/postscript |
pub | application/x-mspublisher |
qt | video/quicktime |
ra | audio/x-pn-realaudio |
ram | audio/x-pn-realaudio |
ras | image/x-cmu-raster |
rgb | image/x-rgb |
rmi | audio/mid |
roff | application/x-troff |
rtf | application/rtf |
rtx | text/richtext |
scd | application/x-msschedule |
sct | text/scriptlet |
setpay | application/set-payment-initiation |
setreg | application/set-registration-initiation |
sh | application/x-sh |
shar | application/x-shar |
sit | application/x-stuffit |
snd | audio/basic |
spc | application/x-pkcs7-certificates |
spl | application/futuresplash |
src | application/x-wais-source |
sst | application/vnd.ms-pkicertstore |
stl | application/vnd.ms-pkistl |
stm | text/html |
svg | image/svg+xml |
sv4cpio | application/x-sv4cpio |
sv4crc | application/x-sv4crc |
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 |
tgz | application/x-compressed |
tif | image/tiff |
tiff | image/tiff |
tr | application/x-troff |
trm | application/x-msterminal |
tsv | text/tab-separated-values |
txt | text/plain |
uls | text/iuls |
ustar | application/x-ustar |
vcf | text/x-vcard |
vrml | x-world/x-vrml |
wav | audio/x-wav |
wcm | application/vnd.ms-works |
wdb | application/vnd.ms-works |
wks | application/vnd.ms-works |
wmf | application/x-msmetafile |
wps | application/vnd.ms-works |
wri | application/x-mswrite |
wrl | x-world/x-vrml |
wrz | x-world/x-vrml |
xaf | x-world/x-vrml |
xbm | image/x-xbitmap |
xla | application/vnd.ms-excel |
xlc | application/vnd.ms-excel |
xlm | application/vnd.ms-excel |
xls | application/vnd.ms-excel |
xlt | application/vnd.ms-excel |
xlw | application/vnd.ms-excel |
xof | x-world/x-vrml |
xpm | image/x-xpixmap |
xwd | image/x-xwindowdump |
z | application/x-compress |
zip | application/zip |