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Nginx allows you to map file extensions to mime types. As the documentation says, it even comes with a pre built list of mime types (pasted at the end of the question).
I've always trusted this list, and things work great, but now I've noticed that some types are missing.
What about application/javascript and application/json?
It uses the old deprecated application/x-javascript, and I imagine that it's to ensure IE support... but is it really ok?
Also, what types should be gzipped?
I've always used the list in the following snippet, although I admit that it was just part of an example nginx conf file, that I used as an example a few years ago, when I first started working with nginx.
Should I also include application/json?
http {
include mime.types;
default_type application/octet-stream;
gzip_types text/plain text/xml text/css
text/comma-separated-values
text/javascript application/x-javascript
application/atom+xml;
# text/html is included in the gzip list by default
# ...
}
The default mime types in /etc/nginx/mime.types.
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 svgz;
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-m4a m4a;
audio/x-realaudio ra;
video/3gpp 3gpp 3gp;
video/mp4 mp4;
video/mpeg mpeg mpg;
video/quicktime mov;
video/webm webm;
video/x-flv flv;
video/x-m4v m4v;
video/x-mng mng;
video/x-ms-asf asx asf;
video/x-ms-wmv wmv;
video/x-msvideo avi;
}
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You can configure Nginx to use gzip to compress the files it serves on the fly. Those files are then decompressed by the browsers that support it upon retrieval with no loss whatsoever, but with the benefit of a smaller amount of data to transfer between the web server and browser.
types; default_type application/octet-stream; gzip_types text/plain text/xml text/css text/comma-separated-values text/javascript application/x-javascript application/atom+xml; # text/html is included in the gzip list by default # ... }
You can tell using Developer Tools (F12). Go to the Network tab, select the file you want to examine and then look at the Headers tab on the right. If you are gzipped, then you will see that in the Content-Encoding.
It uses the old deprecated application/x-javascript, and I imagine that it's to ensure IE support... but is it really ok?
Well, no:
Changes with nginx 1.5.4 27 Aug 2013
*) Change: the "js" extension MIME type has been changed to
"application/javascript"; default value of the "charset_types"
directive was changed accordingly.
http://nginx.org/en/CHANGES
Should I also include application/json?
Why not? The default mime.types file from nginx only contains MIME types for more or less common file extensions. And it certainly isn't very common to have json static files.
Also, what types should be gzipped?
You may include MIME types for all well compressible content that you have on your site. But for static files it will be better to use gzip static module.
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