Nginx開啟Gzip壓縮大幅提高頁面加載速度

剛剛給博客加了一個500px相冊插件，lightbox引入了很多js文件和css文件，頁面一下子看起來非常臃腫，所以還是把Gzip打開了。

環境：Debian 6

1、Vim打開Nginx配置文件

vim /usr/local/nginx/conf/nginx.conf

2、找到如下一段，進行修改

gzip on;
gzip_min_length 1k;
gzip_buffers 4 16k;
#gzip_http_version 1.0;
gzip_comp_level 2;
gzip_types text/plain application/x-javascript text/css application/xml text/javascript application/x-httpd-php image/jpeg image/gif image/png;
gzip_vary off;
gzip_disable "MSIE [1-6].";

3、解釋一下

第1行：開啟Gzip

第2行：不壓縮臨界值，大于1K的才壓縮，一般不用改

第3行：buffer，就是，嗯，算了不解釋了，不用改

第4行：用了反向代理的話，末端通信是HTTP/1.0，有需求的應該也不用看我這科普文了；有這句的話注釋了就行了，默認是HTTP/1.1

第5行：壓縮級別，1-10，數字越大壓縮的越好，時間也越長，看心情隨便改吧

第6行：進行壓縮的文件類型，缺啥補啥就行了，JavaScript有兩種寫法，最好都寫上吧，總有人抱怨js文件沒有壓縮，其實多寫一種格式就行了

第7行：跟Squid等緩存服務有關，on的話會在Header里增加"Vary: Accept-Encoding"，我不需要這玩意，自己對照情況看著辦吧

第8行：IE6對Gzip不怎么友好，不給它Gzip了

4、:wq保存退出，重新加載Nginx

/usr/local/nginx/sbin/nginx -s reload

5、用curl測試Gzip是否成功開啟

curl -I -H "Accept-Encoding: gzip, deflate" "http://www.slyar.com/blog/"

HTTP/1.1 200 OK
Server: nginx/1.0.15
Date: Sun, 26 Aug 2012 18:13:09 GMT
Content-Type: text/html; charset=UTF-8
Connection: keep-alive
X-Powered-By: PHP/5.2.17p1
X-Pingback: http://www.slyar.com/blog/xmlrpc.php
Content-Encoding: gzip

頁面成功壓縮

curl -I -H "Accept-Encoding: gzip, deflate" "http://www.slyar.com/blog/wp-content/plugins/photonic/include/css/photonic.css"

HTTP/1.1 200 OK
Server: nginx/1.0.15
Date: Sun, 26 Aug 2012 18:21:25 GMT
Content-Type: text/css
Last-Modified: Sun, 26 Aug 2012 15:17:07 GMT
Connection: keep-alive
Expires: Mon, 27 Aug 2012 06:21:25 GMT
Cache-Control: max-age=43200
Content-Encoding: gzip

css文件成功壓縮

curl -I -H "Accept-Encoding: gzip, deflate" "http://www.slyar.com/blog/wp-includes/js/jquery/jquery.js"

HTTP/1.1 200 OK
Server: nginx/1.0.15
Date: Sun, 26 Aug 2012 18:21:38 GMT
Content-Type: application/x-javascript
Last-Modified: Thu, 12 Jul 2012 17:42:45 GMT
Connection: keep-alive
Expires: Mon, 27 Aug 2012 06:21:38 GMT
Cache-Control: max-age=43200
Content-Encoding: gzip

js文件成功壓縮

curl -I -H "Accept-Encoding: gzip, deflate" "http://www.slyar.com/blog/wp-content/uploads/2012/08/2012-08-23_203542.png"

HTTP/1.1 200 OK
Server: nginx/1.0.15
Date: Sun, 26 Aug 2012 18:22:45 GMT
Content-Type: image/png
Last-Modified: Thu, 23 Aug 2012 13:50:53 GMT
Connection: keep-alive
Expires: Tue, 25 Sep 2012 18:22:45 GMT
Cache-Control: max-age=2592000
Content-Encoding: gzip

圖片成功壓縮

curl -I -H "Accept-Encoding: gzip, deflate" "http://www.slyar.com/blog/wp-content/plugins/wp-multicollinks/wp-multicollinks.css"

HTTP/1.1 200 OK
Server: nginx/1.0.15
Date: Sun, 26 Aug 2012 18:23:27 GMT
Content-Type: text/css
Content-Length: 180
Last-Modified: Sat, 02 May 2009 08:46:15 GMT
Connection: keep-alive
Expires: Mon, 27 Aug 2012 06:23:27 GMT
Cache-Control: max-age=43200
Accept-Ranges: bytes

最后來個不到1K的文件，由于我的閾值是1K，所以沒壓縮

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