MIME类型就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。

下面列出经常使用的文件对应的MIME类型：

   .asx,video/x-ms-asf
   .xml,text/xml
   .tsv,text/tab-separated-values
   .ra,audio/x-pn-realaudio
   .sv4crc,application/x-sv4crc
   .spc,application/x-pkcs7-certificates
   .pmc,application/x-perfmon
   .lit,application/x-ms-reader
   .crd,application/x-mscardfile
   .isp,application/x-internet-signup
   .wmlsc,application/vnd.wap.wmlscriptc
   .vst,application/vnd.visio
   .xlam,application/vnd.ms-excel.addin.macroEnabled.12
   .ttf,application/octet-stream
   .pfm,application/octet-stream
   .csv,application/octet-stream
   .aaf,application/octet-stream
   .one,application/onenote
   .hta,application/hta
   .atom,application/atom+xml
   .323,text/h323
   .mhtml,message/rfc822
   .midi,audio/mid
   .p7r,application/x-pkcs7-certreqresp
   .mny,application/x-msmoney
   .clp,application/x-msclip
   .vsd,application/vnd.visio
   .lpk,application/octet-stream
   .bin,application/octet-stream
   .onetoc,application/onenote
   .x,application/directx
   .wvx,video/x-ms-wvx
   .vcf,text/x-vcard
   .htc,text/x-component
   .htt,text/webviewhtml
   .h,text/plain
   .mht,message/rfc822
   .mid,audio/mid
   .p7b,application/x-pkcs7-certificates
   .gz,application/x-gzip
   .dvi,application/x-dvi
   .cpio,application/x-cpio
   .vdx,application/vnd.ms-visio.viewer
   .sldm,application/vnd.ms-powerpoint.slide.macroEnabled.12
   .xlm,application/vnd.ms-excel
   .fdf,application/vnd.fdf
   .setreg,application/set-registration-initiation    .eps,application/postscript    .p7s,application/pkcs7-signature    .toc,application/octet-stream    .mdp,application/octet-stream    .ics,application/octet-stream    .chm,application/octet-stream    .asi,application/octet-stream    .afm,application/octet-stream    .evy,application/envoy    .wmp,video/x-ms-wmp    .qt,video/quicktime    .mpv2,video/mpeg    .xslt,text/xml    .etx,text/x-setext    .cod,image/cis-cod    .snd,audio/basic    .au,audio/basic    .man,application/x-troff-man    .qtl,application/x-quicktimeplayer    .pmw,application/x-perfmon    .class,application/x-java-applet    .iii,application/x-iphone    .csh,application/x-csh    .z,application/x-compress    .vtx,application/vnd.visio    .vsw,application/vnd.visio    .wps,application/vnd.ms-works    .potx,application/vnd.openxmlformats-officedocument.presentationml.template    .ps,application/postscript    .p7c,application/pkcs7-mime    .thn,application/octet-stream    .mso,application/octet-stream    .dot,application/msword    .doc,application/msword    .sgml,text/sgml    .nws,message/rfc822    .pbm,image/x-portable-bitmap    .ief,image/ief    .wav,audio/wav    .texi,application/x-texinfo    .mvb,application/x-msmediaview    .hdf,application/x-hdf    .vsx,application/vnd.visio    .dotm,application/vnd.ms-word.template.macroEnabled.12    .docm,application/vnd.ms-word.document.macroEnabled.12    .pptx,application/vnd.openxmlformats-officedocument.presentationml.presentation    .psm,application/octet-stream    .java,application/octet-stream    .eot,application/octet-stream    .jar,application/java-archive    .mpeg,video/mpeg    .xsf,text/xml    .map,text/plain    .uls,text/iuls    .rf,image/vnd.rn-realflash    .m3u,audio/x-mpegurl    .wma,audio/x-ms-wma    .aifc,audio/aiff    .mdb,application/x-msaccess    .mvc,application/x-miva-compiled    .stl,application/vnd.ms-pki.stl    .ppsx,application/vnd.openxmlformats-officedocument.presentationml.slideshow    .xlsb,application/vnd.ms-excel.sheet.binary.macroEnabled.12    .setpay,application/set-payment-initiation    .prm,application/octet-stream     .mix,application/octet-stream    .lzh,application/octet-stream    .hhk,application/octet-stream    .onepkg,application/onenote    .xaf,x-world/x-vrml    .flr,x-world/x-vrml    .IVF,video/x-ivf    .cnf,text/plain    .asm,text/plain    .tiff,image/tiff    .wax,audio/x-ms-wax    .ms,application/x-troff-ms    .tcl,application/x-tcl    .shar,application/x-shar    .sh,application/x-sh    .nc,application/x-netcdf    .hlp,application/winhlp    .oda,application/oda    .pfb,application/octet-stream    .fla,application/octet-stream    .wm,video/x-ms-wm    .rgb,image/x-rgb    .ppm,image/x-portable-pixmap    .ram,audio/x-pn-realaudio    .sit,application/x-stuffit    .dir,application/x-director    .mpp,application/vnd.ms-project    .xla,application/vnd.ms-excel    .ssm,application/streamingmedia    .axs,application/olescript    .ods,application/oleobject    .psp,application/octet-stream    .jpb,application/octet-stream    .wrz,x-world/x-vrml    .m1v,video/mpeg    .mno,text/xml    .cmx,image/x-cmx    .jpeg,image/jpeg    .dib,image/bmp    .rmi,audio/mid    .aiff,audio/aiff    .wmd,application/x-ms-wmd    .wri,application/x-mswrite    .pub,application/x-mspublisher    .ins,application/x-internet-signup    .wks,application/vnd.ms-works    .xls,application/vnd.ms-excel    .ai,application/postscript    .crl,application/pkix-crl    .qxd,application/octet-stream    .dwp,application/octet-stream    .xof,x-world/x-vrml    .wmv,video/x-ms-wmv    .nsc,video/x-ms-asf    .mpa,video/mpeg    .pnm,image/x-portable-anymap    .rpm,audio/x-pn-realaudio-plugin    .aif,audio/x-aiff    .me,application/x-troff-me    .pml,application/x-perfmon    .trm,application/x-msterminal    .m13,application/x-msmediaview    .js,application/x-javascript    .dxr,application/x-director    .potm,application/vnd.ms-powerpoint.template.macroEnabled.12    .xltx,application/vnd.openxmlformats-officedocument.spreadsheetml.template    .xlt,application/vnd.ms-excel    .xlc,application/vnd.ms-excel    .p10,application/pkcs10    .smi,application/octet-stream    .sea,application/octet-stream    .hqx,application/mac-binhex40    .spl,application/futuresplash    .movie,video/x-sgi-movie    .lsf,video/x-la-asf    .txt,text/plain    .jfif,image/pjpeg    .jpe,image/jpeg    .zip,application/x-zip-compressed    .wmf,application/x-msmetafile    .m14,application/x-msmediaview    .latex,application/x-latex    .wcm,application/vnd.ms-works    .pptm,application/vnd.ms-powerpoint.presentation.macroEnabled.12    .xlsx,application/vnd.openxmlformats-officedocument.spreadsheetml.sheet    .hhp,application/octet-stream    .aca,application/octet-stream    .accdb,application/msaccess    .jcz,application/liquidmotion    .wrl,x-world/x-vrml    .wmx,video/x-ms-wmx    .asr,video/x-ms-asf    .lsx,video/x-la-asf    .xsl,text/xml    .html,text/html    .tif,image/tiff    .der,application/x-x509-ca-cert    .pfx,application/x-pkcs12    .p12,application/x-pkcs12    .ppsm,application/vnd.ms-powerpoint.slideshow.macroEnabled.12    .cur,application/octet-stream    .accdt,application/msaccess    .hdml,text/x-hdml    .htm,text/html    .xbm,image/x-xbitmap    .jpg,image/jpeg    .texinfo,application/x-texinfo    .ppam,application/vnd.ms-powerpoint.addin.macroEnabled.12    .xlw,application/vnd.ms-excel    .rm,application/vnd.rn-realmedia    .pdf,application/pdf    .rar,application/octet-stream    .psd,application/octet-stream    .inf,application/octet-stream    .emz,application/octet-stream    .dsp,application/octet-stream    .onea,application/onenote    .jck,application/liquidmotion    .mpe,video/mpeg    .mp2,video/mpeg    .sct,text/scriptlet    .ras,image/x-cmu-raster    .swf,application/x-shockwave-flash    .wmz,application/x-ms-wmz    .gtar,application/x-gtar    .dcr,application/x-director    .sldx,application/vnd.openxmlformats-officedocument.presentationml.slide    .pps,application/vnd.ms-pps    .p7m,application/pkcs7-mime    .xsn,application/octet-stream    .ocx,application/octet-stream    .accde,application/msaccess    .mov,video/quicktime    .wmls,text/vnd.wap.wmlscript    .cpp,text/plain    .c,text/plain    .bas,text/plain    .css,text/css    .art,image/x-jg    .mp3,audio/mpeg    .t,application/x-troff    .roff,application/x-troff    .tar,application/x-tar    .hhc,application/x-oleobject    .scd,application/x-msschedule    .pko,application/vnd.ms-pki.pko    .sst,application/vnd.ms-pki.certstore    .ppt,application/vnd.ms-powerpoint    .xtp,application/octet-stream    .u32,application/octet-stream    .pcx,application/octet-stream    .msi,application/octet-stream    .exe,application/octet-stream    .asd,application/octet-stream    .onetoc2,application/onenote    .fif,application/fractals    .mpg,video/mpeg    .vml,text/xml    .xdr,text/plain    .vcs,text/plain    .hxt,text/html    .eml,message/rfc822    .xpm,image/x-xpixmap    .ico,image/x-icon    .gif,image/gif    .dwf,drawing/x-dwf    .src,application/x-wais-source    .tr,application/x-troff    .pmr,application/x-perfmon    .pma,application/x-perfmon    .dll,application/x-msdownload    .bcpio,application/x-bcpio    .wmlc,application/vnd.wap.wmlc    .wdb,application/vnd.ms-works    .dotx,application/vnd.openxmlformats-officedocument.wordprocessingml.template    .docx,application/vnd.openxmlformats-officedocument.wordprocessingml.document    .pot,application/vnd.ms-powerpoint    .xltm,application/vnd.ms-excel.template.macroEnabled.12    .rtf,application/rtf    .prf,application/pics-rules    .snp,application/octet-stream    .cab,application/octet-stream    .avi,video/x-msvideo    .asf,video/x-ms-asf    .dtd,text/xml    .wml,text/vnd.wap.wml    .vbs,text/vbscript    .rtx,text/richtext    .dlm,text/dlm    .xwd,image/x-xwindowdump    .pgm,image/x-portable-graymap    .bmp,image/bmp    .crt,application/x-x509-ca-cert    .ustar,application/x-ustar    .tex,application/x-tex    .sv4cpio,application/x-sv4cpio    .tgz,application/x-compressed    .cdf,application/x-cdf    .vss,application/vnd.visio    .cat,application/vnd.ms-pki.seccat    .thmx,application/vnd.ms-officetheme    .xlsm,application/vnd.ms-excel.sheet.macroEnabled.12    .prx,application/octet-stream    .pcz,application/octet-stream    .onetmp,application/onenote    .acx,application/internet-property-stream    .wsdl,text/xml    .disco,text/xml    .xsd,text/xml    .wbmp,image/vnd.wap.wbmp    .png,image/png    .pnz,image/png    .smd,audio/x-smd    .smz,audio/x-smd    .smx,audio/x-smd    .mmf,application/x-smaf