原文地址：http://www.cnblogs.com/SingleCat/p/5141716.html
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，比如用PHP输出图片文件、JSON数据、XML文件等非HTML内容 时，就必须用header函数来指定Content-Type，才能达到输出一张图片或是其它指定内容类型的需求。
Application Type
文件扩展名 Content-Type(Mime-Type) 描述
. application/x-
.* application/octet-stream 二进制流，不知道下载文件类型
.pdf application/pdf PDF（Portable Document Format的简称，意为“便携式文件格式”）
.ai application/postscript PostScript（PS）是主要用于电子产业和桌面出版领域的一种页面描述语言和编程语言。
.xml application/atom+xml Atom feeds
.js application/ecmascript 相当于application/javascript但是严格的处理规则
.edi application/EDI-X12 EDI ANSI ASC X12数据
.edi application/EDIFACT EDI EDIFACT数据
.json application/json JSON（JavaScript Object Notation）
.js application/javascript ECMAScript/JavaScript（相当于application/ecmascript但是宽松的处理规则）
.ogg application/ogg Ogg, 视频文件格式
.rdf application/rdf+xml 资源描述框架（Resource Description Framework，缩写 RDF），是万维网联盟（W3C）提出的一组标记语言的技术标准，以便更为丰富地描述和表达网络资源的内容与结构。
.xml application/rss+xml RSS（Really Simple Syndication,简易信息聚合）是一种消息来源格式规范，用以聚合经常发布更新数据的网站，例如博客文章、新闻、音频或视频的网摘
.xml application/soap+xml 简单对象访问协议（SOAP，全写为Simple Object Access Protocol）是交换数据的一种协议规范，使用在计算机网络Web服务（web service）中，交换带结构信息。
.woff application/font-woff Web开放字体格式（Web Open Font Format，简称WOFF）是一种网页所采用的字体格式标准。（推荐使用；使用application/x-font-woff直到它变为官方标准）
.xhtml application/xhtml+xml 可扩展超文本标记语言（eXtensible HyperText Markup Language，XHTML），是一种标记语言，表现方式与超文本标记语言（HTML）类似，不过语法上更加严格。
.xml application/xml 可扩展标记语言（英语：eXtensible Markup Language，简称: XML），是一种标记语言。
.dtd application/xml-dtd XML文件的文件型别定义（Document Type Definition）可以看成一个或者多个XML文件的模板，在这里可以定义XML文件中的元素、元素的属性、元素的排列方式、元素包含的内容等等。
.xml application/xop+xml 二进制优化封装协议(Xmlbinary Optimized Packaging)
.zip application/zip ZIP压缩文件
.gzip application/gzip Gzip是若干种文件压缩程序的简称，通常指GNU计划的实现，此处的gzip代表GNU zip。
.xls application/x-xls XLS 就是 Microsoft Excel 工作表，是一种非常常用的电子表格格式。
.001 application/x-001
.301 application/x-301
.906 application/x-906
.a11 application/x-a11
.awf application/vnd.adobe.workflow
.bmp application/x-bmp
.c4t application/x-c4t
.cal application/x-cals
.cdf application/x-netcdf
.cel application/x-cel
.cg4 application/x-g4
.cit application/x-cit
.bot application/x-bot
.c90 application/x-c90
.cat application/vnd.ms-pki.seccat
.cdr application/x-cdr
.cer application/x-x509-ca-cert
.cgm application/x-cgm
.cmx application/x-cmx
.crl application/pkix-crl
.csi application/x-csi
.cut application/x-cut
.dbm application/x-dbm
.cmp application/x-cmp
.cot application/x-cot
.crt application/x-x509-ca-cert
.dbf application/x-dbf
.dbx application/x-dbx
.dcx application/x-dcx
.dgn application/x-dgn
.dll application/x-msdownload
.dot application/msword
.der application/x-x509-ca-cert
.dib application/x-dib
.doc application/msword
.drw application/x-drw
.dwf application/x-dwf
.dxb application/x-dxb
.edn application/vnd.adobe.edn
.dwg application/x-dwg
.dxf application/x-dxf
.emf application/x-emf
.epi application/x-epi
.eps application/postscript
.exe application/x-msdownload
.fdf application/vnd.fdf
.eps application/x-ps
.etd application/x-ebx
.fif application/fractals
.frm application/x-frm
.gbr application/x-gbr
.g4 application/x-g4
.gl2 application/x-gl2
.hgl application/x-hgl
.hpg application/x-hpgl
.hqx application/mac-binhex40
.hta application/hta
.gp4 application/x-gp4
.hmr application/x-hmr
.hpl application/x-hpl
.hrf application/x-hrf
.icb application/x-icb
.ico application/x-ico
.ig4 application/x-g4
.iii application/x-iphone
.ins application/x-internet-signup
.iff application/x-iff
.igs application/x-igs
.img application/x-img
.isp application/x-internet-signup
.jpe application/x-jpe
.js application/x-javascript
.jpg application/x-jpg
.lar application/x-laplayer-reg
.latex application/x-latex
.lbm application/x-lbm
.ls application/x-javascript
.ltr application/x-ltr
.man application/x-troff-man
.mdb application/msaccess
.mac application/x-mac
.mdb application/x-mdb
.mfp application/x-shockwave-flash
.mi application/x-mi
.mil application/x-mil
.mocha application/x-javascript
.mpd application/vnd.ms-project
.mpp application/vnd.ms-project
.mpt application/vnd.ms-project
.mpw application/vnd.ms-project
.mpx application/vnd.ms-project
.mxp application/x-mmxp
.nrf application/x-nrf
.out application/x-out
.p12 application/x-pkcs12
.p7c application/pkcs7-mime
.p7r application/x-pkcs7-certreqresp
.pc5 application/x-pc5
.pcl application/x-pcl
.pdx application/vnd.adobe.pdx
.pgl application/x-pgl
.pko application/vnd.ms-pki.pko
.p10 application/pkcs10
.p7b application/x-pkcs7-certificates
.p7m application/pkcs7-mime
.p7s application/pkcs7-signature
.pci application/x-pci
.pcx application/x-pcx
.pdf application/pdf
.pfx application/x-pkcs12
.pic application/x-pic
.pl application/x-perl
.plt application/x-plt
.png application/x-png
.ppa application/vnd.ms-powerpoint
.pps application/vnd.ms-powerpoint
.ppt application/x-ppt
.prf application/pics-rules
.prt application/x-prt
.ps application/postscript
.pwz application/vnd.ms-powerpoint
.ra audio/vnd.rn-realaudio RealAudio是一种由RealNetworks发展的RealMedia多媒体音频文件格式，仅指RealPlayer中能够识别的音频文件，也可以理解为real格式的音频文件。
.ras application/x-ras
.pot application/vnd.ms-powerpoint
.ppm application/x-ppm
.ppt application/vnd.ms-powerpoint
.pr application/x-pr
.prn application/x-prn
.ps application/x-ps
.ptn application/x-ptn
.red application/x-red
.rjs application/vnd.rn-realsystem-rjs
.rlc application/x-rlc
.rm application/vnd.rn-realmedia
.rat application/rat-file
.rec application/vnd.rn-recording
.rgb application/x-rgb
.rjt application/vnd.rn-realsystem-rjt
.rle application/x-rle
.rmf application/vnd.adobe.rmf
.rmj application/vnd.rn-realsystem-rmj
.rmp application/vnd.rn-rn_music_package
.rmvb application/vnd.rn-realmedia-vbr
.rnx application/vnd.rn-realplayer
.rpm audio/x-pn-realaudio-plugin
.rms application/vnd.rn-realmedia-secure
.rmx application/vnd.rn-realsystem-rmx
.rsml application/vnd.rn-rsml
.rtf application/msword
.rv video/vnd.rn-realvideo
.sat application/x-sat
.sdw application/x-sdw
.slb application/x-slb
.rtf application/x-rtf
.sam application/x-sam
.sdp application/sdp
.sit application/x-stuffit
.sld application/x-sld
.smi application/smil
.smk application/x-smk
.smil application/smil
.spc application/x-pkcs7-certificates
.spl application/futuresplash
.ssm application/streamingmedia
.stl application/vnd.ms-pki.stl
.sst application/vnd.ms-pki.certstore
.tdf application/x-tdf
.tga application/x-tga
.sty application/x-sty
.swf application/x-shockwave-flash
.tg4 application/x-tg4
.tif application/x-tif
.vdx application/vnd.visio
.vpg application/x-vpeg005
.vsd application/x-vsd
.vst application/vnd.visio
.vsw application/vnd.visio
.vtx application/vnd.visio
.torrent application/x-bittorrent
.vda application/x-vda
.vsd application/vnd.visio
.vss application/vnd.visio
.vst application/x-vst
.vsx application/vnd.visio
.wb1 application/x-wb1
.wb3 application/x-wb3
.wiz application/msword
.wk4 application/x-wk4
.wks application/x-wks
.wb2 application/x-wb2
.wk3 application/x-wk3
.wkq application/x-wkq
.wmf application/x-wmf
.wmd application/x-ms-wmd
.wp6 application/x-wp6
.wpg application/x-wpg
.wq1 application/x-wq1
.wri application/x-wri
.ws application/x-ws
.wmz application/x-ms-wmz
.wpd application/x-wpd
.wpl application/vnd.ms-wpl
.wr1 application/x-wr1
.wrk application/x-wrk
.ws2 application/x-ws
.xdp application/vnd.adobe.xdp
.xfd application/vnd.adobe.xfd
.xfdf application/vnd.adobe.xfdf
.xls application/vnd.ms-excel
.xwd application/x-xwd
.sis application/vnd.symbian.install
.x_t application/x-x_t
.apk application/vnd.android.package-archive
.x_b application/x-x_b
.sisx application/vnd.symbian.install
.ipa application/vnd.iphone
.xap application/x-silverlight-app
.xlw application/x-xlw
.xpl audio/scpls
.anv application/x-anv
.uin application/x-icq
Text Type
文件扩展名 Content-Type(Mime-Type) 描述
.323 text/h323
.biz text/xml
.cml text/xml
.asa text/asa
.asp text/asp
.css text/css 层叠样式表（英语：Cascading Style Sheets，简写CSS），又称串样式列表、层次结构式样式表文件，一种用来为结构化文档（如HTML文档或XML应用）添加样式（字体、间距和颜色等）的计算机语言，由W3C定义和维护。
.csv text/csv 逗号分隔值（Comma-Separated Values，CSV，有时也称为字符分隔值，因为分隔字符也可以不是逗号），其文件以纯文本形式存储表格数据（数字和文本）。
.dcd text/xml
.dtd text/xml
.ent text/xml
.fo text/xml
.htc text/x-component
.html text/html
.htx text/html
.htm text/html
.htt text/webviewhtml
.jsp text/html
.math text/xml
.mml text/xml
.mtx text/xml
.plg text/html
.rdf text/xml
.rt text/vnd.rn-realtext
.sol text/plain
.spp text/xml
.stm text/html
.svg text/xml
.tld text/xml
.txt text/plain 纯文字内容
.uls text/iuls
.vml text/xml
.tsd text/xml
.vcf text/x-vcard
.vxml text/xml
.wml text/vnd.wap.wml
.wsdl text/xml
.wsc text/scriptlet
.xdr text/xml
.xql text/xml
.xsd text/xml
.xslt text/xml
.xml text/xml
.xq text/xml
.xquery text/xml
.xsl text/xml
.xhtml text/html
.odc text/x-ms-odc
.r3t text/vnd.rn-realtext3d
.sor text/plain
Audio Type
文件扩展名 Content-Type(Mime-Type) 描述
.acp audio/x-mei-aac
.aif audio/aiff
.aiff audio/aiff
.aifc audio/aiff
.au audio/basic
.la1 audio/x-liquid-file
.lavs audio/x-liquid-secure
.lmsff audio/x-la-lms
.m3u audio/mpegurl
.midi audio/mid
.mid audio/mid
.mp2 audio/mp2
.mp3 audio/mp3
.mp4 audio/mp4 MP4，全称MPEG-4 Part 14，是一种使用MPEG-4的多媒体计算机文件格式，扩展名为.mp4，以存储数字音频及数字视频为主。
.mnd audio/x-musicnet-download
.mp1 audio/mp1
.mns audio/x-musicnet-stream
.mpga audio/rn-mpeg
.pls audio/scpls
.ram audio/x-pn-realaudio
.rmi audio/mid
.rmm audio/x-pn-realaudio
.snd audio/basic
.wav audio/wav
.wax audio/x-ms-wax
.wma audio/x-ms-wma
Video Type
文件扩展名 Content-Type(Mime-Type) 描述
.asf video/x-ms-asf
.asx video/x-ms-asf
.avi video/avi
.IVF video/x-ivf
.m1v video/x-mpeg
.m2v video/x-mpeg
.m4e video/mpeg4
.movie video/x-sgi-movie
.mp2v video/mpeg
.mp4 video/mpeg4 MP4，全称MPEG-4 Part 14，是一种使用MPEG-4的多媒体计算机文件格式，扩展名为.mp4，以存储数字音频及数字视频为主。
.mpa video/x-mpg
.mpe video/x-mpeg
.mpg video/mpg
.mpeg video/mpg
.mps video/x-mpeg
.mpv video/mpg
.mpv2 video/mpeg
.wm video/x-ms-wm
.wmv video/x-ms-wmv
.wmx video/x-ms-wmx
.wvx video/x-ms-wvx
Image Type
文件扩展名 Content-Type(Mime-Type) 描述
.tif image/tiff 标签图像文件格式（Tagged Image File Format，简写为TIFF）是一种主要用来存储包括照片和艺术图在内的图像的文件格式。它最初由Aldus公司与微软公司一起为PostScript打印开发。
.fax image/fax
.gif image/gif 图像互换格式（GIF，Graphics Interchange Format）是一种位图图形文件格式，以8位色（即256种颜色）重现真彩色的图像。
.ico image/x-icon
.jfif image/jpeg
.jpe image/jpeg
.jpeg image/jpeg JPEG是一种针对相片图像而广泛使用的一种有损压缩标准方法。
.jpg image/jpeg
.net image/pnetvue
.png image/png 便携式网络图形（Portable Network Graphics，PNG）是一种无损压缩的位图图形格式，支持索引、灰度、RGB三种颜色方案以及Alpha通道等特性。
.rp image/vnd.rn-realpix
.tif image/tiff
.tiff image/tiff
.wbmp image/vnd.wap.wbmp
Message Type
文件扩展名 Content-Type(Mime-Type) 描述
.eml message/rfc822
.mht message/rfc822
.mhtml message/rfc822
.nws message/rfc822
Drawing Type
文件扩展名 Content-Type(Mime-Type) 描述
.907 drawing/907
.slk drawing/x-slk
.top drawing/x-top
Java Type
文件扩展名 Content-Type(Mime-Type) 描述
.class java/*
.java java/*
Other Type
文件扩展名 Content-Type(Mime-Type) 描述
.dwf Model/vnd.dwf
