在 JavaScript 中获取内容类型的默认文件扩展名？
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Getting the default file extension for a content-type in JavaScript?
提问by Senseful
If I have a content-type, how can I get its default file extension?
如果我有一个内容类型，我怎样才能获得它的默认文件扩展名？
For example, given one of these content-types, I should get the following file extensions:
例如，给定这些内容类型之一，我应该获得以下文件扩展名：
+------------------------+----------------+
| Content-Type | File Extension |
+------------------------+----------------+
| text/plain | .txt |
| application/javascript | .js |
| application/gzip | .gz |
+------------------------+----------------+
If there is no way to get these extensions automatically in JavaScript, my next solution would be to create a simple relationship between content-type and file extension in a JavaScript array. Therefore, I would accept an answer which has a simple table/database of the most common content-type and file extensions.
如果无法在 JavaScript 中自动获取这些扩展名，我的下一个解决方案是在 JavaScript 数组中创建内容类型和文件扩展名之间的简单关系。因此，我会接受一个包含最常见内容类型和文件扩展名的简单表/数据库的答案。
采纳答案by Mark Kahn
from nginx
来自 nginx
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;
}
回答by Chris Peacock
For Node applications, there is a more up-to-date answer now, which is to use the mime-types NPM package, e.g.:
对于 Node 应用程序，现在有一个更新的答案，那就是使用mime-types NPM 包，例如：
var mime = require('mime-types'),
fileExtension = mime.extension('text/plain');
