获取JavaScript中内容类型的默认文件扩展名？

如果我有一个内容类型，我怎样才能得到它的默认文件扩展名？获取JavaScript中内容类型的默认文件扩展名？

例如，考虑到这些内容类型中的一种，我应该得到以下文件扩展名：

+------------------------+----------------+ 
|  Content-Type  | File Extension | 
+------------------------+----------------+ 
| text/plain    | .txt   | 
| application/javascript | .js   | 
| application/gzip  | .gz   | 
+------------------------+----------------+

如果没有办法在JavaScript中自动获取这些扩展名，我的下一个解决方案是创建JavaScript数组中内容类型和文件扩展名之间的简单关系。因此，我会接受一个含有最常见内容类型和文件扩展名的简单表/数据库的答案。

来源

2012-01-10 Senseful

从nginx的

types { 
    text/html        html htm shtml; 
    text/css        css; 
    text/xml        xml; 
    image/gif        gif; 
    image/jpeg       jpeg jpg; 
    application/x-javascript    js; 
    application/atom+xml     atom; 
    application/rss+xml     rss; 

    text/mathml       mml; 
    text/plain       txt; 
    text/vnd.sun.j2me.app-descriptor  jad; 
    text/vnd.wap.wml      wml; 
    text/x-component      htc; 

    image/png        png; 
    image/tiff       tif tiff; 
    image/vnd.wap.wbmp     wbmp; 
    image/x-icon       ico; 
    image/x-jng       jng; 
    image/x-ms-bmp      bmp; 
    image/svg+xml       svg; 
    image/webp       webp; 

    application/java-archive    jar war ear; 
    application/mac-binhex40    hqx; 
    application/msword     doc; 
    application/pdf      pdf; 
    application/postscript    ps eps ai; 
    application/rtf      rtf; 
    application/vnd.ms-excel    xls; 
    application/vnd.ms-powerpoint   ppt; 
    application/vnd.wap.wmlc    wmlc; 
    application/vnd.google-earth.kml+xml kml; 
    application/vnd.google-earth.kmz  kmz; 
    application/x-7z-compressed   7z; 
    application/x-cocoa     cco; 
    application/x-java-archive-diff  jardiff; 
    application/x-java-jnlp-file   jnlp; 
    application/x-makeself    run; 
    application/x-perl     pl pm; 
    application/x-pilot     prc pdb; 
    application/x-rar-compressed   rar; 
    application/x-redhat-package-manager rpm; 
    application/x-sea      sea; 
    application/x-shockwave-flash   swf; 
    application/x-stuffit     sit; 
    application/x-tcl      tcl tk; 
    application/x-x509-ca-cert   der pem crt; 
    application/x-xpinstall    xpi; 
    application/xhtml+xml     xhtml; 
    application/zip      zip; 

    application/octet-stream    bin exe dll; 
    application/octet-stream    deb; 
    application/octet-stream    dmg; 
    application/octet-stream    eot; 
    application/octet-stream    iso img; 
    application/octet-stream    msi msp msm; 

    audio/midi       mid midi kar; 
    audio/mpeg       mp3; 
    audio/ogg        ogg; 
    audio/x-realaudio      ra; 

    video/3gpp       3gpp 3gp; 
    video/mpeg       mpeg mpg; 
    video/quicktime      mov; 
    video/x-flv       flv; 
    video/x-mng       mng; 
    video/x-ms-asf      asx asf; 
    video/x-ms-wmv      wmv; 
    video/x-msvideo      avi; 
    video/mp4        m4v mp4; 
}

来源

2012-01-10 10:00:56

For节点的应用，还有一个更先进的最新答案现在，这是使用mime-types NPM package，例如：

var mime = require('mime-types'), 
    fileExtension = mime.extension('text/plain');

来源

2017-10-03 16:34:06

获取JavaScript中内容类型的默认文件扩展名？

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