Servers and CGI programs are expected to examine the format types
reported by the Accept header and return data of
an acceptable type when possible. Most servers determine the format
of a document from its filename suffix—for example, a file
ending with .htm or .html
is assumed to be HTML format, so the server sends the document with a
Content-Type of text/html. When
calling a CGI program, servers cannot know the format of the data
being returned, so the CGI program is responsible for reporting the
content type itself. For that reason, every CGI program needs to
include a Content-Type header such as:
Type/subtype
|
Usual extension
|
application/activemessage
|
|
application/andrew-inset
|
|
application/applefile
|
|
application/atomicmail
|
|
application/cals-1840
|
|
application/commonground
|
|
application/cybercash
|
|
application/dca-rft
|
|
application/dec-dx
|
|
application/EDI-Consent
|
|
application/EDIFACT
|
|
application/EDI-X12
|
|
application/eshop
|
|
application/hyperstudio
|
|
application/iges
|
|
application/mac-binhex40
|
|
application/macwriteii
|
|
application/marc
|
|
application/mathematica
|
|
application/msword
|
doc
|
application/news-message-id
|
|
application/news-transmission
|
|
application/octet-stream
|
bin
|
application/oda
|
oda
|
application/pdf
|
pdf
|
application/pgp-encrypted
|
|
application/pgp-signature
|
|
application/pgp-keys
|
|
application/pkcs7-mime
|
|
application/pkcs7-signature
|
|
application/pkcs10
|
|
application/postscript
|
ai, eps, ps
|
application/prs.alvestrand.titrax-sheet
|
|
application/prs.cww
|
|
application/prs.nprend
|
|
application/remote-printing
|
|
application/riscos
|
|
application/rtf
|
rtf
|
application/set-payment-initiation
|
|
application/set-payment
|
|
application/set-registration-initiation
|
|
application/set-registration
|
|
application/sgml
|
sgm, sgml, gml, dtd
|
application/sgml-open-catalog
|
soc, cat
|
application/slate
|
|
application/vemmi
|
|
application/vnd.$commerce_battelle
|
|
application/vnd.3M.Post-it-Notes
|
|
application/vnd.acucobol
|
|
application/vnd.anser-web-funds-transfer-initiation
|
|
application/vnd.anser-web-certificate-issue-initiation
|
|
application/vnd.audiograph
|
|
application/vnd.businessobjects
|
|
application/vnd.claymore
|
|
application/vnd.comsocaller
|
|
application/vnd.dna
|
|
application/vnd.dxr
|
|
application/vnd.ecdis-update
|
|
application/vnd.ecowin.chart
|
|
application/vnd.ecowin.filerequest
|
|
application/vnd.ecowin.fileupdate
|
|
application/vnd.ecowin.series
|
|
application/vnd.ecowin.seriesrequest
|
|
application/vnd.ecowin.seriesupdate
|
|
application/vnd.enliven
|
|
application/vnd.epson.salt
|
|
application/vnd.fdf
|
|
application/vnd.ffsns
|
|
application/vnd.FloGraphIt
|
|
application/vnd.framemaker
|
|
application/vnd.fujitsu.oasys
|
|
application/vnd.fujitsu.oasys2
|
|
application/vnd.fujitsu.oasys3
|
|
application/vnd.fujitsu.oasysprs
|
|
application/vnd.fujitsu.oasysgp
|
|
application/vnd.fujixerox.docuworks
|
|
application/vnd.hp-hps
|
|
application/vnd.hp-HPGL
|
|
application/vnd.hp-PCL
|
|
application/vnd.hp-PCLXL
|
|
application/vnd.ibm.MiniPay
|
|
application/vnd.ibm.modcap
|
|
application/vnd.intercon.formnet
|
|
application/vnd.intertrust.digibox
|
|
application/vnd.intertrust.nncp
|
|
application/vnd.is-xpr
|
|
application/vnd.japannet-directory-service
|
|
application/vnd.japannet-jpnstore-wakeup
|
|
application/vnd.japannet-payment-wakeup
|
|
application/vnd.japannet-registration
|
|
application/vnd.japannet-registration-wakeup
|
|
application/vnd.japannet-setstore-wakeup
|
|
application/vnd.japannet-verification
|
|
application/vnd.japannet-verification-wakeup
|
|
application/vnd.koan
|
|
application/vnd.lotus-wordpro
|
|
application/vnd.lotus-approach
|
|
application/vnd.lotus-1-2-3
|
|
application/vnd.lotus-organizer
|
|
application/vnd.lotus-screencam
|
|
application/vnd.lotus-freelance
|
|
application/vnd.meridian-slingshot
|
|
application/vnd.mif
|
|
application/vnd.minisoft-hp3000-save
|
|
application/vnd.mitsubishi.misty-guard.trustweb
|
|
application/vnd.ms-artgalry
|
|
application/vnd.ms-asf
|
|
application/vnd.ms-excel
|
|
application/vnd.ms-powerpoint
|
|
application/vnd.ms-project
|
|
application/vnd.ms-tnef
|
|
application/vnd.ms-works
|
|
application/vnd.music-niff
|
|
application/vnd.musician
|
|
application/vnd.netfpx
|
|
application/vnd.noblenet-web
|
|
application/vnd.noblenet-sealer
|
|
application/vnd.noblenet-directory
|
|
application/vnd.novadigm.EDM
|
|
application/vnd.novadigm.EDX
|
|
application/vnd.novadigm.EXT
|
|
application/vnd.osa.netdeploy
|
|
application/vnd.powerbuilder6
|
|
application/vnd.powerbuilder6-s
|
|
application/vnd.rapid
|
|
application/vnd.seemail
|
|
application/vnd.shana.informed.formtemplate
|
|
application/vnd.shana.informed.formdata
|
|
application/vnd.shana.informed.package
|
|
application/vnd.shana.informed.interchange
|
|
application/vnd.street-stream
|
|
application/vnd.svd
|
|
application/vnd.swiftview-ics
|
|
application/vnd.truedoc
|
|
application/vnd.visio
|
|
application/vnd.webturbo
|
|
application/vnd.wrq-hp3000-labelled
|
|
application/vnd.wt.stf
|
|
application/vnd.xara
|
|
application/vnd.yellowriver-custom-menu
|
|
application/wita
|
|
application/wordperfect5.1
|
|
application/x-bcpio
|
bcpio
|
application/x-cpio
|
cpio
|
application/x-csh
|
csh
|
application/x-dvi
|
dvi
|
application/x-gtar
|
gtar
|
application/x-hdf
|
hdf
|
application/x-latex
|
latex
|
application/x-mif
|
mif
|
application/x-netcdf
|
nc, cdf
|
application/x-sh
|
sh
|
application/x-shar
|
shar
|
application/x-sv4cpio
|
sv4cpio
|
application/x-sv4crc
|
sv4crc
|
application/x-tar
|
tar
|
application/x-tcl
|
tcl
|
application/x-tex
|
tex
|
application/x-texinfo
|
texinfo, texi
|
application/x-troff-man
|
man
|
application/x-troff-me
|
me
|
application/x-troff-ms
|
ms
|
application/x-troff
|
t, tr, roff
|
application/x-ustar
|
ustar
|
application/x-wais-source
|
src
|
application/xml
|
xml, dtd
|
application/x400-bp
|
|
application/zip
|
zip
|
audio/32kadpcm
|
|
audio/32kadpcm
|
|
audio/basic
|
au, snd
|
audio/vnd.qcelp
|
wav
|
audio/x-aiff
|
aif, aiff, aifc
|
audio/x-wav
|
wav
|
image/cgm
|
cgm
|
image/g3fax
|
|
image/gif
|
gif
|
image/ief
|
ief
|
image/jpeg
|
jpeg, jpg, jpe
|
image/naplps
|
|
image/png
|
png
|
image/tiff
|
tiff, tif
|
image/vnd.dwg
|
|
image/vnd.dxf
|
|
image/vnd.fpx
|
|
image/vnd.net-fpx
|
|
image/vnd.svf
|
|
image/vnd.xiff
|
|
image/x-cmu-raster
|
ras
|
image/x-portable-anymap
|
rpnm
|
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/external-body
|
|
message/http
|
|
message/news
|
|
message/partial
|
|
message/rfc822
|
|
model/iges
|
|
model/mesh
|
|
model/vnd.dwf
|
|
model/vrml
|
|
multipart/alternative
|
|
multipart/appledouble
|
|
multipart/digest
|
|
multipart/form-data
|
|
multipart/header-set
|
|
multipart/mixed
|
|
multipart/parallel
|
|
multipart/related
|
|
multipart/report
|
|
multipart/voice-message
|
|
text/enriched
|
|
text/html
|
html, htm
|
text/plain
|
txt
|
text/richtext
|
rtx
|
text/sgml
|
sgm, sgml, gml, dtd
|
text/tab-separated-values
|
tsv
|
text/xml
|
xml, dtd
|
text/x-setext
|
etx
|
video/mpeg
|
mpeg, mpg, mpe
|
video/quicktime
|
qt, mov
|
video/vnd.vivo
|
|
video/vnd.motorola.video
|
|
video/vnd.motorola.videop
|
|
video/x-msvideo
|
qvi
|
video/x-sgi-movie
|
movie
|