示例一：下载docx 文件,后台返回文件流
1. 设置 响应类型resonseType （blob 或者arraybuffer）
axios.get(url,{resonseType:‘blob‘})
2. 根据返回值（文件流）创建blob 对象,并指定type文件类型 (doxc 为例)
let resData = new Blob([res.data],{type:‘application/vnd.openxmlformats-officedocument.wordprocessingml.document‘})
3. 使用 URL.createObjectURL 创建一个url 链接
let dowLink= URL.createObjectURL(resData)
4. 创建一个a 标签type 为download，进行下载
var aDom = document.createElement("a");
aDom.setAttribute(‘style‘, ‘display:none‘);
aDom.setAttribute(‘href‘, dowLink);
aDom.setAttribute(‘download‘, filename+".docx");
document.body.appendChild(aDom);
aDom.click();
URL.revokeObjectURL(dowLink);
document.body.removeChild(aDom);
示例二： 生成base64 图片(后台返回数据流)
axios.get(url, { responseType: ‘arraybuffer‘}).then(response=>{
let imgSrc =‘data:image/png;base64,‘ + btoa(new Uint8Array(response.data).reduce((data, byte) => data + String.fromCharCode(byte), ‘‘));
})
二：部分后缀对应的content-type
| 后缀 | MIME Type |
|---|---|
| .323 | text/h323 |
| .3g2 | video/3gpp2 |
| .3gp | video/3gpp |
| .3gp2 | video/3gpp2 |
| .3gpp | video/3gpp |
| .7z | application/x-7z-compressed |
| .aa | audio/audible |
| .AAC | audio/aac |
| .aaf | application/octet-stream |
| .aax | audio/vnd.audible.aax |
| .ac3 | audio/ac3 |
| .aca | application/octet-stream |
| .accda | application/msaccess.addin |
| .accdb | application/msaccess |
| .accdc | application/msaccess.cab |
| .accde | application/msaccess |
| .accdr | application/msaccess.runtime |
| .accdt | application/msaccess |
| .accdw | application/msaccess.webapplication |
| .accft | application/msaccess.ftemplate |
| .acx | application/internet-property-stream |
| .AddIn | text/xml |
| .ade | application/msaccess |
| .adobebridge | application/x-bridge-url |
| .adp | application/msaccess |
| .ADT | audio/vnd.dlna.adts |
| .ADTS | audio/aac |
| .afm | application/octet-stream |
| .ai | application/postscript |
| .aif | audio/x-aiff |
| .aifc | audio/aiff |
| .aiff | audio/aiff |
| .air | application/vnd.adobe.air-application-installer-package+zip |
| .amc | application/x-mpeg |
| .application | application/x-ms-application |
| .art | image/x-jg |
| .asa | application/xml |
| .asax | application/xml |
| .ascx | application/xml |
| .asd | application/octet-stream |
| .asf | video/x-ms-asf |
| .ashx | application/xml |
| .asi | application/octet-stream |
| .asm | text/plain |
| .asmx | application/xml |
| .aspx | application/xml |
| .asr | video/x-ms-asf |
| .asx | video/x-ms-asf |
| .atom | application/atom+xml |
| .au | audio/basic |
| .avi | video/x-msvideo |
| .axs | application/olescript |
| .bas | text/plain |
| .bcpio | application/x-bcpio |
| .bin | application/octet-stream |
| .bmp | image/bmp |
| .c | text/plain |
| .cab | application/octet-stream |
| .caf | audio/x-caf |
| .calx | application/vnd.ms-office.calx |
| .cat | application/vnd.ms-pki.seccat |
| .cc | text/plain |
| .cd | text/plain |
| .cdda | audio/aiff |
| .cdf | application/x-cdf |
| .cer | application/x-x509-ca-cert |
| .chm | application/octet-stream |
| .class | application/x-java-applet |
| .clp | application/x-msclip |
| .cmx | image/x-cmx |
| .cnf | text/plain |
| .cod | image/cis-cod |
| .config | application/xml |
| .contact | text/x-ms-contact |
| .coverage | application/xml |
| .cpio | application/x-cpio |
| .cpp | text/plain |
| .crd | application/x-mscardfile |
| .crl | application/pkix-crl |
| .crt | application/x-x509-ca-cert |
| .cs | text/plain |
| .csdproj | text/plain |
| .csh | application/x-csh |
| .csproj | text/plain |
| .css | text/css |
| .csv | text/csv |
| .cur | application/octet-stream |
| .cxx | text/plain |
| .dat | application/octet-stream |
| .datasource | application/xml |
| .dbproj | text/plain |
| .dcr | application/x-director |
| .def | text/plain |
| .deploy | application/octet-stream |
| .der | application/x-x509-ca-cert |
| .dgml | application/xml |
| .dib | image/bmp |
| .dif | video/x-dv |
| .dir | application/x-director |
| .disco | text/xml |
| .dll | application/x-msdownload |
| .dll.config | text/xml |
| .dlm | text/dlm |
| .doc | application/msword |
| .docm | application/vnd.ms-word.document.macroEnabled.12 |
| .docx | application/vnd.openxmlformats-officedocument.wordprocessingml.document |
| .dot | application/msword |
| .dotm | application/vnd.ms-word.template.macroEnabled.12 |
| .dotx | application/vnd.openxmlformats-officedocument.wordprocessingml.template |
| .dsp | application/octet-stream |
| .dsw | text/plain |
| .dtd | text/xml |
| .dtsConfig | text/xml |
| .dv | video/x-dv |
| .dvi | application/x-dvi |
| .dwf | drawing/x-dwf |
| .dwp | application/octet-stream |
| .dxr | application/x-director |
| .eml | message/rfc822 |
| .emz | application/octet-stream |
| .eot | application/octet-stream |
| .eps | application/postscript |
| .etl | application/etl |
| .etx | text/x-setext |
| .evy | application/envoy |
| .exe | application/octet-stream |
| .exe.config | text/xml |
| .fdf | application/vnd.fdf |
| .fif | application/fractals |
| .filters | Application/xml |
| .fla | application/octet-stream |
| .flr | x-world/x-vrml |
| .flv | video/x-flv |
| .fsscript | application/fsharp-script |
| .fsx | application/fsharp-script |
| .generictest | application/xml |
| .gif | image/gif |
| .group | text/x-ms-group |
| .gsm | audio/x-gsm |
| .gtar | application/x-gtar |
| .gz | application/x-gzip |
| .h | text/plain |
| .hdf | application/x-hdf |
| .hdml | text/x-hdml |
| .hhc | application/x-oleobject |
| .hhk | application/octet-stream |
| .hhp | application/octet-stream |
| .hlp | application/winhlp |
| .hpp | text/plain |
| .hqx | application/mac-binhex40 |
| .hta | application/hta |
| .htc | text/x-component |
| .htm | text/html |
| .html | text/html |
| .htt | text/webviewhtml |
| .hxa | application/xml |
| .hxc | application/xml |
| .hxd | application/octet-stream |
| .hxe | application/xml |
| .hxf | application/xml |
| .hxh | application/octet-stream |
| .hxi | application/octet-stream |
| .hxk | application/xml |
| .hxq | application/octet-stream |
| .hxr | application/octet-stream |
| .hxs | application/octet-stream |
| .hxt | text/html |
| .hxv | application/xml |
| .hxw | application/octet-stream |
| .hxx | text/plain |
| .i | text/plain |
| .ico | image/x-icon |
| .ics | application/octet-stream |
| .idl | text/plain |
| .ief | image/ief |
| .iii | application/x-iphone |
| .inc | text/plain |
| .inf | application/octet-stream |
| .inl | text/plain |
| .ins | application/x-internet-signup |
| .ipa | application/x-itunes-ipa |
| .ipg | application/x-itunes-ipg |
| .ipproj | text/plain |
| .ipsw | application/x-itunes-ipsw |
| .iqy | text/x-ms-iqy |
| .isp | application/x-internet-signup |
| .ite | application/x-itunes-ite |
| .itlp | application/x-itunes-itlp |
| .itms | application/x-itunes-itms |
| .itpc | application/x-itunes-itpc |
| .IVF | video/x-ivf |
| .jar | application/java-archive |
| .java | application/octet-stream |
| .jck | application/liquidmotion |
| .jcz | application/liquidmotion |
| .jfif | image/pjpeg |
| .jnlp | application/x-java-jnlp-file |
| .jpb | application/octet-stream |
| .jpe | image/jpeg |
| .jpeg | image/jpeg |
| .jpg | image/jpeg |
| .js | application/x-javascript |
| .jsx | text/jscript |
| .jsxbin | text/plain |
| .latex | application/x-latex |
| .library-ms | application/windows-library+xml |
| .lit | application/x-ms-reader |
| .loadtest | application/xml |
| .lpk | application/octet-stream |
| .lsf | video/x-la-asf |
| .lst | text/plain |
| .lsx | video/x-la-asf |
| .lzh | application/octet-stream |
| .m13 | application/x-msmediaview |
| .m14 | application/x-msmediaview |
| .m1v | video/mpeg |
| .m2t | video/vnd.dlna.mpeg-tts |
| .m2ts | video/vnd.dlna.mpeg-tts |
| .m2v | video/mpeg |
| .m3u | audio/x-mpegurl |
| .m3u8 | audio/x-mpegurl |
| .m4a | audio/m4a |
| .m4b | audio/m4b |
| .m4p | audio/m4p |
| .m4r | audio/x-m4r |
| .m4v | video/x-m4v |
| .mac | image/x-macpaint |
| .mak | text/plain |
| .man | application/x-troff-man |
| .manifest | application/x-ms-manifest |
| .map | text/plain |
| .master | application/xml |
| .mda | application/msaccess |
| .mdb | application/x-msaccess |
| .mde | application/msaccess |
| .mdp | application/octet-stream |
| .me | application/x-troff-me |
| .mfp | application/x-shockwave-flash |
| .mht | message/rfc822 |
| .mhtml | message/rfc822 |
| .mid | audio/mid |
| .midi | audio/mid |
| .mix | application/octet-stream |
| .mk | text/plain |
| .mmf | application/x-smaf |
| .mno | text/xml |
| .mny | application/x-msmoney |
| .mod | video/mpeg |
| .mov | video/quicktime |
| .movie | video/x-sgi-movie |
| .mp2 | video/mpeg |
| .mp2v | video/mpeg |
| .mp3 | audio/mpeg |
| .mp4 | video/mp4 |
| .mp4v | video/mp4 |
| .mpa | video/mpeg |
| .mpe | video/mpeg |
| .mpeg | video/mpeg |
| .mpf | application/vnd.ms-mediapackage |
| .mpg | video/mpeg |
| .mpp | application/vnd.ms-project |
| .mpv2 | video/mpeg |
| .mqv | video/quicktime |
| .ms | application/x-troff-ms |
| .msi | application/octet-stream |
| .mso | application/octet-stream |
| .mts | video/vnd.dlna.mpeg-tts |
| .mtx | application/xml |
| .mvb | application/x-msmediaview |
| .mvc | application/x-miva-compiled |
| .mxp | application/x-mmxp |
| .nc | application/x-netcdf |
| .nsc | video/x-ms-asf |
| .nws | message/rfc822 |
| .ocx | application/octet-stream |
| .oda | application/oda |
| .odc | text/x-ms-odc |
| .odh | text/plain |
| .odl | text/plain |
| .odp | application/vnd.oasis.opendocument.presentation |
| .ods | application/oleobject |
| .odt | application/vnd.oasis.opendocument.text |
| .one | application/onenote |
| .onea | application/onenote |
| .onepkg | application/onenote |
| .onetmp | application/onenote |
| .onetoc | application/onenote |
| .onetoc2 | application/onenote |
| .orderedtest | application/xml |
| .osdx | application/opensearchdescription+xml |
| .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 |
| .pbm | image/x-portable-bitmap |
| .pcast | application/x-podcast |
| .pct | image/pict |
| .pcx | application/octet-stream |
| .pcz | application/octet-stream |
| application/pdf | |
| .pfb | application/octet-stream |
| .pfm | application/octet-stream |
| .pfx | application/x-pkcs12 |
| .pgm | image/x-portable-graymap |
| .pic | image/pict |
| .pict | image/pict |
| .pkgdef | text/plain |
| .pkgundef | text/plain |
| .pko | application/vnd.ms-pki.pko |
| .pls | audio/scpls |
| .pma | application/x-perfmon |
| .pmc | application/x-perfmon |
| .pml | application/x-perfmon |
| .pmr | application/x-perfmon |
| .pmw | application/x-perfmon |
| .png | image/png |
| .pnm | image/x-portable-anymap |
| .pnt | image/x-macpaint |
| .pntg | image/x-macpaint |
| .pnz | image/png |
| .pot | application/vnd.ms-powerpoint |
| .potm | application/vnd.ms-powerpoint.template.macroEnabled.12 |
| .potx | application/vnd.openxmlformats-officedocument.presentationml.template |
| .ppa | application/vnd.ms-powerpoint |
| .ppam | application/vnd.ms-powerpoint.addin.macroEnabled.12 |
| .ppm | image/x-portable-pixmap |
| .pps | application/vnd.ms-powerpoint |
| .ppsm | application/vnd.ms-powerpoint.slideshow.macroEnabled.12 |
| .ppsx | application/vnd.openxmlformats-officedocument.presentationml.slideshow |
| .ppt | application/vnd.ms-powerpoint |
| .pptm | application/vnd.ms-powerpoint.presentation.macroEnabled.12 |
| .pptx | application/vnd.openxmlformats-officedocument.presentationml.presentation |
| .prf | application/pics-rules |
| .prm | application/octet-stream |
| .prx | application/octet-stream |
| .ps | application/postscript |
| .psc1 | application/PowerShell |
| .psd | application/octet-stream |
| .psess | application/xml |
| .psm | application/octet-stream |
| .psp | application/octet-stream |
| .pub | application/x-mspublisher |
| .pwz | application/vnd.ms-powerpoint |
| .qht | text/x-html-insertion |
| .qhtm | text/x-html-insertion |
| .qt | video/quicktime |
| .qti | image/x-quicktime |
| .qtif | image/x-quicktime |
| .qtl | application/x-quicktimeplayer |
| .qxd | application/octet-stream |
| .ra | audio/x-pn-realaudio |
| .ram | audio/x-pn-realaudio |
| .rar | application/octet-stream |
| .ras | image/x-cmu-raster |
| .rat | application/rat-file |
| .rc | text/plain |
| .rc2 | text/plain |
| .rct | text/plain |
| .rdlc | application/xml |
| .resx | application/xml |
| .rf | image/vnd.rn-realflash |
| .rgb | image/x-rgb |
| .rgs | text/plain |
| .rm | application/vnd.rn-realmedia |
| .rmi | audio/mid |
| .rmp | application/vnd.rn-rn_music_package |
| .roff | application/x-troff |
| .rpm | audio/x-pn-realaudio-plugin |
| .rqy | text/x-ms-rqy |
| .rtf | application/rtf |
| .rtx | text/richtext |
| .ruleset | application/xml |
| .s | text/plain |
| .safariextz | application/x-safari-safariextz |
| .scd | application/x-msschedule |
| .sct | text/scriptlet |
| .sd2 | audio/x-sd2 |
| .sdp | application/sdp |
| .sea | application/octet-stream |
| .searchConnector-ms | application/windows-search-connector+xml |
| .setpay | application/set-payment-initiation |
| .setreg | application/set-registration-initiation |
| .settings | application/xml |
| .sgimb | application/x-sgimb |
| .sgml | text/sgml |
| .sh | application/x-sh |
| .shar | application/x-shar |
| .shtml | text/html |
| .sit | application/x-stuffit |
| .sitemap | application/xml |
| .skin | application/xml |
| .sldm | application/vnd.ms-powerpoint.slide.macroEnabled.12 |
| .sldx | application/vnd.openxmlformats-officedocument.presentationml.slide |
| .slk | application/vnd.ms-excel |
| .sln | text/plain |
| .slupkg-ms | application/x-ms-license |
| .smd | audio/x-smd |
| .smi | application/octet-stream |
| .smx | audio/x-smd |
| .smz | audio/x-smd |
| .snd | audio/basic |
| .snippet | application/xml |
| .snp | application/octet-stream |
| .sol | text/plain |
| .sor | text/plain |
| .spc | application/x-pkcs7-certificates |
| .spl | application/futuresplash |
| .src | application/x-wais-source |
| .srf | text/plain |
| .SSISDeploymentManifest | text/xml |
| .ssm | application/streamingmedia |
| .sst | application/vnd.ms-pki.certstore |
| .stl | application/vnd.ms-pki.stl |
| .sv4cpio | application/x-sv4cpio |
| .sv4crc | application/x-sv4crc |
| .svc | application/xml |
| .swf | application/x-shockwave-flash |
| .t | application/x-troff |
| .tar | application/x-tar |
| .tcl | application/x-tcl |
| .testrunconfig | application/xml |
| .testsettings | application/xml |
| .tex | application/x-tex |
| .texi | application/x-texinfo |
| .texinfo | application/x-texinfo |
| .tgz | application/x-compressed |
| .thmx | application/vnd.ms-officetheme |
| .thn | application/octet-stream |
| .tif | image/tiff |
| .tiff | image/tiff |
| .tlh | text/plain |
| .tli | text/plain |
| .toc | application/octet-stream |
| .tr | application/x-troff |
| .trm | application/x-msterminal |
| .trx | application/xml |
| .ts | video/vnd.dlna.mpeg-tts |
| .tsv | text/tab-separated-values |
| .ttf | application/octet-stream |
| .tts | video/vnd.dlna.mpeg-tts |
| .txt | text/plain |
| .u32 | application/octet-stream |
| .uls | text/iuls |
| .user | text/plain |
| .ustar | application/x-ustar |
| .vb | text/plain |
| .vbdproj | text/plain |
| .vbk | video/mpeg |
| .vbproj | text/plain |
| .vbs | text/vbscript |
| .vcf | text/x-vcard |
| .vcproj | Application/xml |
| .vcs | text/plain |
| .vcxproj | Application/xml |
| .vddproj | text/plain |
| .vdp | text/plain |
| .vdproj | text/plain |
| .vdx | application/vnd.ms-visio.viewer |
| .vml | text/xml |
| .vscontent | application/xml |
| .vsct | text/xml |
| .vsd | application/vnd.visio |
| .vsi | application/ms-vsi |
| .vsix | application/vsix |
| .vsixlangpack | text/xml |
| .vsixmanifest | text/xml |
| .vsmdi | application/xml |
| .vspscc | text/plain |
| .vss | application/vnd.visio |
| .vsscc | text/plain |
| .vssettings | text/xml |
| .vssscc | text/plain |
| .vst | application/vnd.visio |
| .vstemplate | text/xml |
| .vsto | application/x-ms-vsto |
| .vsw | application/vnd.visio |
| .vsx | application/vnd.visio |
| .vtx | application/vnd.visio |
| .wav | audio/wav |
| .wave | audio/wav |
| .wax | audio/x-ms-wax |
| .wbk | application/msword |
| .wbmp | image/vnd.wap.wbmp |
| .wcm | application/vnd.ms-works |
| .wdb | application/vnd.ms-works |
| .wdp | image/vnd.ms-photo |
| .webarchive | application/x-safari-webarchive |
| .webtest | application/xml |
| .wiq | application/xml |
| .wiz | application/msword |
| .wks | application/vnd.ms-works |
| .WLMP | application/wlmoviemaker |
| .wlpginstall | application/x-wlpg-detect |
| .wlpginstall3 | application/x-wlpg3-detect |
| .wm | video/x-ms-wm |
| .wma | audio/x-ms-wma |
| .wmd | application/x-ms-wmd |
| .wmf | application/x-msmetafile |
| .wml | text/vnd.wap.wml |
| .wmlc | application/vnd.wap.wmlc |
| .wmls | text/vnd.wap.wmlscript |
| .wmlsc | application/vnd.wap.wmlscriptc |
| .wmp | video/x-ms-wmp |
| .wmv | video/x-ms-wmv |
| .wmx | video/x-ms-wmx |
| .wmz | application/x-ms-wmz |
| .wpl | application/vnd.ms-wpl |
| .wps | application/vnd.ms-works |
| .wri | application/x-mswrite |
| .wrl | x-world/x-vrml |
| .wrz | x-world/x-vrml |
| .wsc | text/scriptlet |
| .wsdl | text/xml |
| .wvx | video/x-ms-wvx |
| .x | application/directx |
| .xaf | x-world/x-vrml |
| .xaml | application/xaml+xml |
| .xap | application/x-silverlight-app |
| .xbap | application/x-ms-xbap |
| .xbm | image/x-xbitmap |
| .xdr | text/plain |
| .xht | application/xhtml+xml |
| .xhtml | application/xhtml+xml |
| .xla | application/vnd.ms-excel |
| .xlam | application/vnd.ms-excel.addin.macroEnabled.12 |
| .xlc | application/vnd.ms-excel |
| .xld | application/vnd.ms-excel |
| .xlk | application/vnd.ms-excel |
| .xll | application/vnd.ms-excel |
| .xlm | application/vnd.ms-excel |
| .xls | application/vnd.ms-excel |
| .xlsb | application/vnd.ms-excel.sheet.binary.macroEnabled.12 |
| .xlsm | application/vnd.ms-excel.sheet.macroEnabled.12 |
| .xlsx | application/vnd.openxmlformats-officedocument.spreadsheetml.sheet |
| .xlt | application/vnd.ms-excel |
| .xltm | application/vnd.ms-excel.template.macroEnabled.12 |
| .xltx | application/vnd.openxmlformats-officedocument.spreadsheetml.template |
| .xlw | application/vnd.ms-excel |
| .xml | text/xml |
| .xmta | application/xml |
| .xof | x-world/x-vrml |
| .XOML | text/plain |
| .xpm | image/x-xpixmap |
| .xps | application/vnd.ms-xpsdocument |
| .xrm-ms | text/xml |
| .xsc | application/xml |
| .xsd | text/xml |
| .xsf | text/xml |
| .xsl | text/xml |
| .xslt | text/xml |
| .xsn | application/octet-stream |
| .xss | application/xml |
| .xtp | application/octet-stream |
| .xwd | image/x-xwindowdump |
| .z | application/x-compress |
| .zip | application/x-zip-compressed |
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