Content-Type，內容類型，一般是指網頁中存在的Content-Type，用來定義網頁檔案的類型和網頁的編碼，決定瀏覽器將以什麼形式、什麼編碼讀拿這個文件，這就是為什麼經常看到一些Asp網頁點擊的結果卻是下載到的一個文件或一張圖片的原因。

HTTP  content-type 對照表

audio/aiff.anvapplication/x-anv.asatext /asa.asfvideo/x-ms-asf.asp.asx.avi.biz.bot#.c90.cat.cdr.cer.cgm.class##.cmpapplication/x-cmp.cmx#application/x-cmx.cotapplication/x- cot.crlapplication/pkix-crl.crtapplication/x-x509-ca-cert.csiapplication/x-csi.csstext/css.cutapplication/x-cut.dbf#application/x-dbfapplication/x-dbx##.dcd#text /xml.dcxapplication/x-dcx.derapplication/x-x509-ca-cert .dgnapplication/x-dgn#.dibapplication/x-dib# .dllapplication/x-msdownload.docapplication/msword.dot## application/msword.drwapplication/x-drw.dtdtext/xml#.dwfModel/vnd.dwf.dwfapplication/x-dwf.dwgapplication/x-dwg.dxb#application/x-dxb#####.exeapplication/x-msdownload.faximage/fax.fdfapplication/vnd .fdf.fifapplication/fractals.fotext/xml.frmapplication/x-frm.g4application/x-g4##.gbr .gif.gp4.hmr##.hpgapplication/x-hpgl.hpl#application/x-hpl.hqx#application/mac -binhex40.hrfapplication/x-hrf.htaapplication/hta.htctext/x-component.htmtext/htmltext/htmltext/htmlimage/x-icon#application/x-iff##.ig4 #application/x-g4.igs#application/x-igs.iiiapplication/x-iphone .imgapplication/x-img.insapplication/x-internet-signup#.ispapplication/x-internet-signup.IVFvideo/x-ivf#.javajava/*.jfif#image/jpeg.jpeimage/jpeg.jpeapplication/x-jpe.jpegimage/jpeg.jpgimage/jpeg.jpgapplication/x-jpg.js#application/x-javascriptaudio/x-liquid -file##application/x-latex.lavsaudio/x-liquid-secure.lbmapplication/x-lbm#.lmsffaudio/x-la-lms.lsapplication/x-javascript### ##.ltr######application/x-ltr######.m1v######video/x-mpeg############.m2v## ####視訊/x-mpeg######.m3u######音訊/mpegurl############.m4e######視訊/mpeg4# #####.mac######application/x-mac#############.man######application/x-troff-man##### #.math######text/xml############.mdb######application/msaccess######.mdb#######application /x-mdb########.mid#音訊/mid.midi音訊/mid#.milapplication/x-mil.mmltext/xml.mndaudio/x-musicnet-download.mns#audio/x-musicnet-stream.mochaapplication/x-javascript.movi​​e# #video /x-sgi-電影.mp1#音訊/mp1.mp2音訊/mp2.mp2v視訊/mpeg.mp3音訊/mp3 .mp4 video/mpeg4.mpavideo/x-mpg##.mpd application/ vnd.ms-project.mpevideo/x-mpeg.mpegvideo/mpg.mpg影片/mpg.mpga音訊/rn-mpeg.mppapplication/vnd.ms-project.mpsvideo/x-mpeg.mpt #application /vnd.ms-project.mpvvideo/mpg.mpv2video/mpeg.mpwapplication/vnd.ms-project.mpxapplication/vnd.ms-project.mtxtext/xml.mxpapplication/x-mmxp# .pdfapplication/pdf.pdf#application/pdf.pdx######################################.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########.ps.pwz.ra#.ras# #.ratapplication/rat-file.rdftext/xmlapplication/x-redapplication/vnd.rn-realsystem-rjsapplication/x-rlcapplication/vnd.rn-realmedia音訊/midaudio/x-pn-realaudioapplication/vnd.rn-realmedia-secureapplication/vnd.rn-realsystem-rmximage/vnd.rn-realpixapplication/vnd.rn-rsml.rtf##.rv#video/vnd.rn-realvideo.samapplication/x-sam.satapplication/ x-sat.sdpapplication/sdp#.sdwapplication/x-sdw# #.sitapplication/x-stuffit.slbapplication/x-slb.sldapplication/x-sld.slk#drawing/x-slk.smiapplication/smil .smilapplication/smil#.smkapplication/x-smk#.snd音訊/基本.sol###文字/純文字############.sor### # ##text/plain######.spc######application/x-pkcs7-certificates############.spl#######application/futuresplash # #####.spp######text/xml############.ssm######應用程式/串流媒體######.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# ### ####.vsxapplication/vnd.visio.vtxapplication/vnd.visio.vxml#text/xml .wav音訊/wav.wax音訊/x-ms-wax.wb1application/x-wb1.wb2application/x-wb2# .wb3application/x-wb3.wbmpimage/vnd.wap.wbmp.wizapplication/msword.wk3application/x-wk3.wk4#application/x- wk4.wkqapplication/x-wkq.wksapplication/x-wks.wm視訊/x-ms-wm.wma音訊/x-ms-wma。 wmdapplication/x-ms-wmd.wmfapplication/x-wmf.wmltext/vnd.wap.wml.wmvvideo/x-ms-wmv.wmx #video/x-ms-wmx.wmzapplication/x-ms-wmz.wp6#application /x-wp6.wpdapplication/x-wpd.wpgapplication/x-wpg.wplapplication/vnd.ms-wpl.wq1application/x-wq1#.wr1application/x-wr1.wriapplication/x-wri# .wrkapplication/x-wrk.ws#application/x-ws.wsc#.wvx.xdr.xfdf.xls######.application/vnd .ms-excel############.xls######application/x-xls######.xlw######application/x-xlw## ##########.xml######文字/xml######.xpl######音訊/scpls############ .xq######文字/xml######.xql######文字/xml#######
#檔案副檔名Content-Type(Mime-Type)#檔案副檔名Content-Type(Mime-Type)
#.*（二進位流，不知道下載檔案類型） application/octet-stream.tifimage/tiff
.001application/x-001 .301application/x-301
#.323text/h323#.906 application/x-906
.907drawing/907.a11#application/ x-a11
.acpaudio/x-mei-aac.aiapplication/postscript
.aifaudio/aiff.aifcaudio/aiff
. aiffaudio/aiff.anv
##text/asp
video/x-ms-asf#.auaudio/basic
video/avi.awfapplication/vnd.adobe.workflow
text/ xml.bmpapplication/x-bmp
application/x-bot #.c4tapplication/x-c4t
application/x-c90 #.calapplication/x-cals
#application/vnd.ms-pki.seccat. cdfapplication/x-netcdf
#application/x-cdr.cel #application/x-cel
#application/x-x509-ca-cert.cg4#application /x-g4
application/x-cgm.citapplication/x-cit
java/*.cmltext/xml
##.dbmapplication/x-dbm.dbx
.dxfapplication/x-dxf.ednapplication/vnd.adobe.edn
#.emfapplication/x-emf.emlmessage/rfc822
.enttext/xml.epiapplication/x-epi
.epsapplication/x-ps.epsapplication/postscript
#.etdapplication/x-ebx
application/x-gbr.application/x-
image/ gif.gl2application/x-gl2
application/x-gp4 #.hglapplication/x-hgl
application/x-hmr
##.html
.htttext/webviewhtml.htx
.icbapplication/x-icb#.ico
。 icoapplication/x-ico.iff
.jsp#text/html.la1
.larapplication/x-laplayer-reg.latex
.mfpapplication/x-shockwave-flash.mhtmessage/rfc822
# .mhtmlmessage/rfc822.mi#application/x-mi
## .net image/pnetvue.nrf#application/x-nrf
.nws# message/ rfc822.odctext/x-ms-odc
.outapplication/x-out .p10application/pkcs10
.p12application/x-pkcs12.p7b application/x-pkcs7-certificates
#.p7capplication/pkcs7-mime#.p7m #application /pkcs7-mime
.p7rapplication/x-pkcs7-certreqresp#.p7sapplication/pkcs7 -signature
.pc5application/x-pc5.pciapplication/x-pci
#.pclapplication/x-pcl.pcxapplication/x-pcx
.prfapplication/pics-rules.prnapplication/x-prn
.prtapplication/x-prt.ps#application/x-ps
。 ##application/postscript.ptnapplication/x-ptn
application/vnd.ms- powerpoint.r3ttext/vnd.rn-realtext3d
audio/vnd.rn-realaudio.ramaudio/x-pn-realaudio
application/x-ras
##.recapplication/vnd.rn-recording.red
.rgb#application/x -rgb.rjs
.rjtapplication/vnd.rn -realsystem-rjt.rlc
.rleapplication/x-rle.rm
.rmfapplication/vnd.adobe.rmf.rmi
.rmjapplication/vnd.rn-realsystem-rmj #.rmm
.rmpapplication/vnd.rn-rn_music_package#.rms
.rmvbapplication/vnd.rn-realmedia-vbr #.rmx
#.rnxapplication/vnd.rn-realplayer #.rp
.rpmaudio/x-pn-realaudio-plugin #.rsml
.rttext/vnd.rn-realtext
##.rtfapplication/msword
#application/x-rtf
.tg4application/x-tg4.tgaapplication/x-tga
# .tifimage/tiff.tif#application/x-tif
.tiff
##映像/tiff.tldtext/xml
#.topdrawing/x-top.torrentapplication/x-bittorrent
.tsdtext/xml.txt #text/plain
.uinapplication/x-icq.ulstext/iuls
#.vcftext/x-vcard.vdaapplication/x-vda
.vdxapplication/vnd.visio.vmltext/xml
.vpg#application/x-vpeg005.vsdapplication/vnd.visio
.vsd#application/x- vsd.vssapplication/vnd.visio
#.vstapplication/vnd.visio.vstapplication/x-vst
.vswapplication/vnd.visio
##.ws2#application/x-ws
text/scriptlet#.wsdl#text/xml
video/x-ms-wvx#.xdpapplication/vnd.adobe.xdp
text/xml.xfdapplication/vnd.adobe.xfd
application/vnd.adobe.xfdf.xhtmltext/html
.xquerytext/xml.xsd#text/xml
.xsltext/xml.xslttext/xml
#.xwdapplication/x-xwd.x_bapplication/x-x_b
#.sisapplication/vnd.symbian.install.sisxapplication/vnd.symbian.install
#.x_tapplication/x-x_t#.ipaapplication/vnd.iphone
.apkapplication/vnd.android.package-archive.xap application/x-silverlight-app