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，决定文件接收方将以什么形式、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。
MIME(Multipurpose Internet Mail Extensions)多用途互联网邮件扩展类型。是设定某种扩展名的文件用一种应用程序来打开的方式类型，当该扩展名文件被访问的时候，浏览器会自动使用指定应用程序来打开。多用于指定一些客户端自定义的文件名，以及一些媒体文件打开方式。
| .*（ 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 |
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