response的contentType的类型值

本文导读：ContentType 属性指定服务器响应的 HTTP 内容类型。如果未指定 ContentType，默认为 text/html。response的ContentType()的作用是使客户端浏览器，区分不同种类的数据，并根据不同的MIME调用浏览器内不同的程序嵌入模块来处理相应的数据。

MIME类型的含义

 

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。 　　

 

MIME的英文全称是"Multipurpose Internet Mail Extensions" 多功能Internet 邮件扩充服务，它是一种多用途网际邮件扩充协议，在1992年最早应用于电子邮件系统，但后来也应用到浏览器。服务器会将它们发送的多媒体数据的类型告诉浏览器，而通知手段就是说明该多媒体数据的MIME类型，从而让浏览器知道接收到的信息哪些是MP3文件，哪些是Shockwave文件等等。服务器将MIME标志符放入传送的数据中来告诉浏览器使用哪种插件读取相关文件。 　　

 

MIME能够支持非ASCII字符、二进制格式附件等多种格式的邮件消息。这个标准被定义在; RFC 2045，; RFC 2046，; RFC 2047，; RFC 2048，; RFC 2049等RFC中。 由RFC 822转变而来的RFC 2822，规定电子邮件标准并不允许在邮件消息中使用7位ASCII字符集以外的字符。正因如此，一些非英语字符消息和二进制文件，图像，声音等非文字消息都不能在电子邮件中传输。MIME规定了用于表示各种各样的数据类型的符号化方法。 　　

 

浏览器接收到文件后，会进入插件系统进行查找，查找出哪种插件可以识别读取接收到的文件。如果浏览器不清楚调用哪种插件系统，它可能会告诉用户缺少某插件，或者直接选择某现有插件来试图读取接收到的文件，后者可能会导致系统的崩溃。传输的信息中缺少MIME标识可能导致的情况很难估计，因为某些计算机系统可能不会出现什么故障，但某些计算机可能就会因此而崩溃。

 

在把输出结果传送到浏览器上的时候，浏览器必须启动适当的应用程序来处理这个输出文档。这可以通过多种类型MIME（多功能网际邮件扩充协议）来完成。在HTTP中，MIME类型被定义在Content-Type header中。 　　

　　

例如，假设你要传送一个Microsoft Excel文件到客户端。那么这时的MIME类型就是“application/vnd.ms-excel”。在大多数实际情况中，这个文件然后将传送给Execl来处理（假设我们设定Excel为处理特殊MIME类型的应用程序）。在ASP.NET中，设定MIME类型的方法是通过Response对象的ContentType属性。

 

response的contentType

 

ajax开发中在请求服务器端的响应时, 对于每一种返回类型 规范的做法是要在服务端指定response的contentType 的. (当然 不指定绝大多数情况下也没什么问题 尤其是返回"非xml"的时候) 。

 

常遇到下面的几种情况:

1、 服务端需要返回一段普通文本给客户端，Content-Type="text/plain"
2 、服务端需要返回一段HTML代码给客户端 ，Content-Type="text/html"
3 、服务端需要返回一段XML代码给客户端 ，Content-Type="text/xml"
4 、服务端需要返回一段javascript代码给客户端，text/javascript
5 、服务端需要返回一段json串给客户端，application/Json

 

比较全面的contentType的类型值

 

.*（ 二进制流，不知道下载文件类型）application/octet-stream.tifimage/tiff.asptext/asp.asxvideo/x-ms-asf.auaudio/basic.avivideo/avi.awfapplication/vnd.adobe.workflow.biztext/xml.bmpapplication/x-bmp.botapplication/x-bot.citapplication/x-cit.classjava/*.csiapplication/x-csi.csstext/css.dcdtext/xml.dcxapplication/x-dcx.dibapplication/x-dib.dllapplication/x-msdownload.docapplication/msword.dotapplication/msword.drwapplication/x-drw.dtdtext/xml.dwfModel/vnd.dwf.dwfapplication/x-dwf.etdapplication/x-ebx.exeapplication/x-msdownload.gifimage/gif.gl2application/x-gl2.hrfapplication/x-hrf.htaapplication/hta.htctext/x-component.htmtext/html.htmltext/html.htttext/webviewhtml.htxtext/html.icbapplication/x-icb.icoimage/x-icon.icoapplication/x-ico.iffapplication/x-iff.ig4application/x-g4.igsapplication/x-igs.iiiapplication/x-iphone.imgapplication/x-img.insapplication/x-internet-signup.javajava/*.jfifimage/jpeg.jpeimage/jpeg.jpeapplication/x-jpe.jpegimage/jpeg.jpgimage/jpeg.jpgapplication/x-jpg.jsapplication/x-javascript.jsptext/html.la1audio/x-liquid-file.mdbapplication/msaccess.mdbapplication/x-mdb.mfpapplication/x-shockwave-flash.mhtmessage/rfc822.mhtmlmessage/rfc822.miapplication/x-mi.midaudio/mid.midiaudio/mid.milapplication/x-mil.mmltext/xml.mndaudio/x-musicnet-download.mnsaudio/x-musicnet-stream.mochaapplication/x-javascript.movievideo/x-sgi-movie.mp1audio/mp1.mp2audio/mp2.mp2vvideo/mpeg.mp3audio/mp3.mp4video/mpeg4.mpavideo/x-mpg.mpdapplication/vnd.ms-project.mpevideo/x-mpeg.mpegvideo/mpg.mpgvideo/mpg.mpgaaudio/rn-mpeg.mppapplication/vnd.ms-project.mpsvideo/x-mpeg.mptapplication/vnd.ms-project.mpvvideo/mpg.mpv2video/mpeg.mpwapplication/vnd.ms-project.mpxapplication/vnd.ms-project.mtxtext/xml.mxpapplication/x-mmxp.netimage/pnetvue.nrfapplication/x-nrf.nwsmessage/rfc822.odctext/x-ms-odc.outapplication/x-out.p10application/pkcs10.p12application/x-pkcs12.p7bapplication/x-pkcs7-certificates.p7capplication/pkcs7-mime.p7mapplication/pkcs7-mime.p7rapplication/x-pkcs7-certreqresp.p7sapplication/pkcs7-signature.pc5application/x-pc5.pciapplication/x-pci.pclapplication/x-pcl.pcxapplication/x-pcx.pdfapplication/pdf.pdfapplication/pdf.pdxapplication/vnd.adobe.pdx.pfxapplication/x-pkcs12.pglapplication/x-pgl.picapplication/x-pic.pkoapplication/vnd.ms-pki.pko.plapplication/x-perl.plgtext/html.plsaudio/scpls.pltapplication/x-plt.pngimage/png.pngapplication/x-png.potapplication/vnd.ms-powerpoint.ppaapplication/vnd.ms-powerpoint.ppmapplication/x-ppm.ppsapplication/vnd.ms-powerpoint.pptapplication/vnd.ms-powerpoint.pptapplication/x-ppt.prapplication/x-pr.prfapplication/pics-rules.prnapplication/x-prn.prtapplication/x-prt.psapplication/x-ps.psapplication/postscript.ptnapplication/x-ptn.pwzapplication/vnd.ms-powerpoint.r3ttext/vnd.rn-realtext3d.raaudio/vnd.rn-realaudio.ramaudio/x-pn-realaudio.rasapplication/x-ras.ratapplication/rat-file.rdftext/xml.recapplication/vnd.rn-recording.redapplication/x-red.rgbapplication/x-rgb.rjsapplication/vnd.rn-realsystem-rjs.rjtapplication/vnd.rn-realsystem-rjt.rlcapplication/x-rlc.rleapplication/x-rle.rmapplication/vnd.rn-realmedia.rmfapplication/vnd.adobe.rmf.rmiaudio/mid.rmjapplication/vnd.rn-realsystem-rmj.rmmaudio/x-pn-realaudio.rmpapplication/vnd.rn-rn_music_package.rmsapplication/vnd.rn-realmedia-secure.rmvbapplication/vnd.rn-realmedia-vbr.rmxapplication/vnd.rn-realsystem-rmx.rnxapplication/vnd.rn-realplayer.rpimage/vnd.rn-realpix.rpmaudio/x-pn-realaudio-plugin.rsmlapplication/vnd.rn-rsml.rttext/vnd.rn-realtext.rtfapplication/msword.rtfapplication/x-rtf.rvvideo/vnd.rn-realvideo.samapplication/x-sam.satapplication/x-sat.sdpapplication/sdp.sdwapplication/x-sdw.sitapplication/x-stuffit.slbapplication/x-slb.sldapplication/x-sld.slkdrawing/x-slk.smiapplication/smil.smilapplication/smil.smkapplication/x-smk.sndaudio/basic.soltext/plain.sortext/plain.spcapplication/x-pkcs7-certificates.splapplication/futuresplash.spptext/xml.ssmapplication/streamingmedia.sstapplication/vnd.ms-pki.certstore.stlapplication/vnd.ms-pki.stl.stmtext/html.styapplication/x-sty.svgtext/xml.swfapplication/x-shockwave-flash.tdfapplication/x-tdf.tg4application/x-tg4.tgaapplication/x-tga.tifimage/tiff.tifapplication/x-tif.tiffimage/tiff.tldtext/xml.topdrawing/x-top.torrentapplication/x-bittorrent.tsdtext/xml.txttext/plain.uinapplication/x-icq.ulstext/iuls.vcftext/x-vcard.vdaapplication/x-vda.vdxapplication/vnd.visio.vmltext/xml.vpgapplication/x-vpeg005.vsdapplication/vnd.visio.vsdapplication/x-vsd.vssapplication/vnd.visio.vstapplication/vnd.visio.vstapplication/x-vst.vswapplication/vnd.visio.vsxapplication/vnd.visio.vtxapplication/vnd.visio.vxmltext/xml.wavaudio/wav.waxaudio/x-ms-wax.wb1application/x-wb1.wb2application/x-wb2.wb3application/x-wb3.wbmpimage/vnd.wap.wbmp.wizapplication/msword.wk3application/x-wk3.wk4application/x-wk4.wkqapplication/x-wkq.wksapplication/x-wks.wmvideo/x-ms-wm.wmaaudio/x-ms-wma.wmdapplication/x-ms-wmd.wmfapplication/x-wmf.wmltext/vnd.wap.wml.wmvvideo/x-ms-wmv.wmxvideo/x-ms-wmx.wmzapplication/x-ms-wmz.wp6application/x-wp6.wpdapplication/x-wpd.wpgapplication/x-wpg.wplapplication/vnd.ms-wpl.wq1application/x-wq1.wr1application/x-wr1.wriapplication/x-wri.wrkapplication/x-wrk.wsapplication/x-ws.ws2application/x-ws.wsctext/scriptlet.wsdltext/xml.wvxvideo/x-ms-wvx.xdpapplication/vnd.adobe.xdp.xdrtext/xml.xfdapplication/vnd.adobe.xfd.xfdfapplication/vnd.adobe.xfdf.xhtmltext/html.xlsapplication/vnd.ms-excel.xlsapplication/x-xls.xlwapplication/x-xlw.xmltext/xml.xplaudio/scpls.xqtext/xml.xqltext/xml.xquerytext/xml.xsdtext/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.xapapplication/x-silverlight-app文件扩展名Content-Type(Mime-Type)文件扩展名Content-Type(Mime-Type)