Shulou(Shulou.com)06/02 Report--

Why use gzip Compression

When gzip compression of nginx is enabled, the size of static resources such as js,css in the web page will be greatly reduced, thus saving a lot of bandwidth, improving transmission efficiency, and giving users a fast experience.

Implementing gzip with nginx

The principle of nginx to achieve resource compression is to intercept requests through the default integrated ngx_http_gzip_module module, and do gzip for the types that need to do gzip. It is very easy to turn on it and set the options.

Request headers and response headers after gzip takes effect

The processing process of Request Headers:Accept-Encoding:gzip,deflate,sdchResponse Headers:Content-Encoding:gzipCache-Control:max-age240gzip

From the point of view of the http protocol, the request header declares acceopt-encoding:gzip deflate sdch (refers to the compression algorithm, where sdch is a compression method pushed by google itself)

Server-> response-> compress content with gzip-> send to browser-"browser decode gzip- > receive gzip compressed content"

Common configuration parameters of gzip

Gzip on | whether off    enables gzipgzip_buffers    4k    buffering (how many blocks are compressed and buffered in memory? How big is each piece? Gzip_comp_level [1-9]    recommends 6    compression level. The higher the compression level is, the minimum compression is, and the more wasteful cpu resources are. Gzip_disable    canonically matches what kind of URi UA is. The minimum length of compression starting without gzipgzip_min_length    2000s. Less than this length nginx does not compress gzip_http_version    1.0. 1.1The http protocol version that starts compression (default 1.1) gzip_proxied    sets the requestor proxy server, how to cache content gzip_types   text/plain    application/xml    for which types of files are compressed such as txt,xml,html,cssgzip_vary    off   whether to transfer gzip compression flag nginx configuration gzip

Static page index.html

Demonstrate nginx to do gzip compression

Nginx realizes gzip compression, reduces bandwidth consumption, increases website speed nginx to achieve gzip compression, reduces bandwidth occupation, increases website speed nginx to achieve gzip compression, reduces bandwidth occupation, increases website speed nginx to achieve gzip compression, reduces bandwidth occupation, improves website speed nginx to achieve gzip compression, reduces bandwidth consumption, and improves website speed nginx to achieve gzip compression. Reduce bandwidth consumption while increasing website speed

Configuration of nginx

Server {listen 80; server_name localhost 192.168.0.96; gzip on; gzip_buffers 324k; gzip_comp_level 6; gzip_min_length 200; gzip_types application/javascript application/x-javascript text/javascript text/xml text/css; gzip_vary off; root/ Users/lidong/Desktop/wwwroot/test; index index.php index.html index.htm; access_log / Users/lidong/wwwlogs/access.log Error_log / Users/lidong/wwwlogs/error.log; location ~ [^ /]\ .php (/ | $) {fastcgi_pass 127.0.0.1 fastcgi_pass 9000; fastcgi_index index.php; fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name; include fastcgi_params;}}

For page requests before using gzip:

The request for the gzip page was opened:

Be careful

For pictures, mp3 generally does not need compression, because the compression ratio is relatively small. Generally, smaller files in text,css,js,xml format do not need compression, and may be larger than source files. Binary files do not need to be compressed.

Summary

The above is the realization method of gzip compression to improve the speed of the website in nginx introduced by the editor. I hope it will be helpful to you. If you have any questions, you are welcome to leave a message, and the editor will reply you in time!

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.