# 開啟Nginx配置檔案
vim /usr/local/nginx/conf/nginx.conf

# 找到如下，進行修改
gzip on;							// 開啟Gzip
gzip_min_length 1k;					// 不壓縮臨界值，大於1K的才壓縮，一般不用改
gzip_buffers 4 16k;					// buffer，不用修改
#gzip_http_version 1.0;				// 反向代理末端通訊HTTP/1.0，預設是HTTP/1.1
gzip_comp_level 2;					// 壓縮級別，1-10，數字越大壓縮越高，時間越長
gzip_types text/plain application/x-javascript text/css application/xml text/javascript application/x-httpd-php image/jpeg image/gif image/png;		// 壓縮檔案型別，注意JavaScript的兩種寫法
gzip_vary off;						// 快取服務有關，開啟會在Header裡增加"Vary: Accept-Encoding"
gzip_disable "MSIE [1-6]\.";		// 設定不壓縮，IE1-6不壓縮
# 儲存退出

# 重新載入Nginx
/usr/local/nginx/sbin/nginx -s reload

# 測試頁面Gzip是否成功開啟
curl -I -H "Accept-Encoding: gzip, deflate" "網站域名路徑"

# 頁面成功壓縮
HTTP/1.1 200 OK
Server: nginx/1.0.15
Date: 26 Sep 2018 11:13:09 GMT
Content-Type: text/html; charset=UTF-8
Connection: keep-alive
X-Powered-By: PHP/7.2.10
X-Pingback: 網站域名路徑/index.php
Content-Encoding: gzip

# 測試CSS Gzip是否成功開啟
curl -I -H "Accept-Encoding: gzip, deflate" "網站域名路徑/css/public.css"

# CSS檔案成功壓縮
HTTP/1.1 200 OK
Server: nginx/1.0.15
Date: 26 Sep 2018 11:21:25 GMT
Content-Type: text/css
Last-Modified: 24 Sep 2018 09:47:53 GMT
Connection: keep-alive
Expires:  27 Aug 2012 06:21:25 GMT
Cache-Control: max-age=43200
Content-Encoding: gzip

# 測試JS Gzip是否成功開啟
curl -I -H "Accept-Encoding: gzip, deflate" "網站域名路徑/js/jquery.js"

# JS檔案成功壓縮
HTTP/1.1 200 OK
Server: nginx/1.0.15
Date: 26 Sep 2018 11:21:38 GMT
Content-Type: application/x-javascript
Last-Modified: 24 Sep 2018 09:48:23 GMT
Connection: keep-alive
Expires: 26 Sep 2018 23:21:38 GMT
Cache-Control: max-age=43200
Content-Encoding: gzip

# 測試JS Gzip是否成功開啟
curl -I -H "Accept-Encoding: gzip, deflate" "網站域名路徑/images/logo.png"

# 圖片成功壓縮
HTTP/1.1 200 OK
Server: nginx/1.0.15
Date: 26 Sep 2018 11:22:45 GMT
Content-Type: image/png
Last-Modified: 24 Sep 2018 09:49:13 GMT
Connection: keep-alive
Expires: 25 Oct 2018 11:22:45 GMT
Cache-Control: max-age=2592000
Content-Encoding: gzip

# 測試小於1K檔案Gzip是否成功開啟
curl -I -H "Accept-Encoding: gzip, deflate" "網站域名路徑/css/cases.css"

# 小於1K檔案不壓縮
HTTP/1.1 200 OK
Server: nginx/1.0.15
Date: 26 Sep 2018 11:23:27 GMT
Content-Type: text/css
Content-Length: 180
Last-Modified: 24 Sep 2018 09:47:45 GMT
Connection: keep-alive
Expires: 26 Sep 2018 11:23:27 GMT
Cache-Control: max-age=43200
Accept-Ranges: bytes