Content-Type（MIME）用于标识发送或接收数据的类型，浏览器根据该参数来决定数据的打开方式。多用于指定一些客户端自定义的文件，以及一些媒体文件的打开方式。
OSS默认自动识别文件类型。例如上传的文件类型为.jpg，OSS会自动将该文件识别为图片文件。您可以通过控制台、图形化工具ossbrowser、命令行工具ossutil、各语言SDK例如Java SDK、Python SDK、PHP SDK、Go SDK等方式来修改文件类型。
常见Content-Type（MIME）列表如下：
| 文件扩展名 | Content-Type(Mime-Type) | 文件扩展名 | Content-Type(Mime-Type) |
|---|---|---|---|
| （二进制流，未知的文件类型） | application/octet-stream | .tif | image/tiff |
| 0.001 | application/x-001 | 0.301 | application/x-301 |
| 0.323 | text/h323 | 0.906 | application/x-906 |
| 0.907 | 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 |
| .apk | application/vnd.android.package-archive | .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 |
| .docx | application/vnd.openxmlformats-officedocument.wordprocessingml.document | .dot | application/msword |
| .dotx | application/vnd.openxmlformats-officedocument.wordprocessingml.template | .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 | .ipa | application/vnd.iphone |
| .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/mp4 | .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 | .pdb | chemical/x-pdb | |
| .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 |
| .potx | application/vnd.openxmlformats-officedocument.presentationml.template | .ppa | application/vnd.ms-powerpoint |
| .ppm | application/x-ppm | .pps | application/vnd.ms-powerpoint |
| .ppsx | application/vnd.openxmlformats-officedocument.presentationml.slideshow | .ppt | application/vnd.ms-powerpoint |
| .ppt | application/x-ppt | . pptx | application/vnd.openxmlformats-officedocument.presentationml.presentation |
| .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 |
| .sis | application/vnd.symbian.install | .sisx | application/vnd.symbian.install |
| .sit | application/x-stuffit | .slb | application/x-slb |
| .sld | application/x-sld | .sldx | application/vnd.openxmlformats-officedocument.presentationml.slide |
| .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 | image/svg+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 |
| .xap | application/x-silverlight-app | .x_b | application/x-x_b |
| .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 | .xlsx | application/vnd.openxmlformats-officedocument.spreadsheetml.sheet |
| .xltx | application/vnd.openxmlformats-officedocument.spreadsheetml.template | .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_t | application/x-x_t |
| .yaml | text/vnd.yaml | .yml | text/vnd.yml |
| .webp | image/webp | 无 | 无 |
