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sudo truncate -s 1k /var/www/html/test.html sudo truncate -s 1k /var/www/html/test.jpg sudo truncate -s 1k /var/www/html/test.css sudo truncate -s 1k /var/www/html/test.js下一步是检查Nginx在使用我们刚创建的文件在全新安装中压缩请求的文件时的行为。
curl -H "Accept-Encoding: gzip" -I http://localhost/test.html可以看到以下结果:
Output HTTP/1.1 200 OK Server: nginx/1.18.0 (Ubuntu) Date: Tue, 09 Feb 2021 19:04:25 GMT Content-Type: text/html Last-Modified: Tue, 09 Feb 2021 19:03:41 GMT Connection: keep-alive ETag: W/"6022dc8d-400" Content-Encoding: gzip在最后一行,出现Content-Encoding: gzip字样。说明服务器正在用gzip压缩来发送文件。默认情况下,nginx仅压缩html文件。所有在这个命令中可以看到文件做了压缩处理。但其它的文件格式,并未做压缩处理。
curl -H "Accept-Encoding: gzip" -I http://localhost/test.jpg再看一下结果,和之前的有所不同:
Output HTTP/1.1 200 OK Server: nginx/1.18.0 (Ubuntu) Date: Tue, 09 Feb 2021 19:05:49 GMT Content-Type: image/jpeg Content-Length: 1024 Last-Modified: Tue, 09 Feb 2021 19:03:45 GMT Connection: keep-alive ETag: "6022dc91-400" Accept-Ranges: bytes输出结果中没有出现Content-Encoding: gzip,这意味着该文件并没有做任何的压缩。
curl -H "Accept-Encoding: gzip" -I http://localhost/test.css结果一样,没有出现Content-Encoding: gzip
Output HTTP/1.1 200 OK Server: nginx/1.18.0 (Ubuntu) Date: Tue, 09 Feb 2021 19:06:04 GMT Content-Type: text/css Content-Length: 1024 Last-Modified: Tue, 09 Feb 2021 19:03:45 GMT Connection: keep-alive ETag: "6022dc91-400" Accept-Ranges: bytes
sudo nano /etc/nginx/nginx.conf找到gzip设置部分,如下所示:
. . . ## # `gzip` Settings # # gzip on; gzip_disable "msie6"; # gzip_vary on; # gzip_proxied any; # gzip_comp_level 6; # gzip_buffers 16 8k; # gzip_http_version 1.1; # gzip_types text/plain text/css application/json application/x-javascript text/xml application/xml application/xml+rss text/javascript; . . .因为我们用的是ubuntu 20.04。所以默认情况下,gzip是开启的。但有些设置无效,所以我们需要做一些修改:
. . . ## # `gzip` Settings # # gzip on; gzip_disable "msie6"; gzip_vary on; gzip_proxied any; gzip_comp_level 6; gzip_buffers 16 8k; gzip_http_version 1.1; gzip_min_length 256; gzip_types application/atom+xml application/geo+json application/javascript application/x-javascript application/json application/ld+json application/manifest+json application/rdf+xml application/rss+xml application/xhtml+xml application/xml font/eot font/otf font/ttf image/svg+xml text/css text/javascript text/plain text/xml; . . .保存并关闭文件以退出。要启用新配置,需要重新启动Nginx:
sudo systemctl restart nginx
curl -H "Accept-Encoding: gzip" -I http://localhost/test.html因为html文件,之前已经默认开启压缩,所以这个命令执行结果保持不变:
Output HTTP/1.1 200 OK Server: nginx/1.18.0 (Ubuntu) Date: Tue, 09 Feb 2021 19:04:25 GMT Content-Type: text/html Last-Modified: Tue, 09 Feb 2021 19:03:41 GMT Connection: keep-alive ETag: W/"6022dc8d-400" Content-Encoding: gzip然后我们来测试一下之前未压缩的css样式表,看看结果会有什么变化:
curl -H "Accept-Encoding: gzip" -I http://localhost/test.css可以看到gzip正在压缩文件:
Output HTTP/1.1 200 OK Server: nginx/1.18.0 (Ubuntu) Date: Tue, 09 Feb 2021 19:21:54 GMT Content-Type: text/css Last-Modified: Tue, 09 Feb 2021 19:03:45 GMT Connection: keep-alive Vary: Accept-Encoding ETag: W/"6022dc91-400" Content-Encoding: gzip我们可以用相同的方式测试一下jpg文件:
curl -H "Accept-Encoding: gzip" -I http://localhost/test.jpg没有看到gzip压缩:
Output HTTP/1.1 200 OK Server: nginx/1.18.0 (Ubuntu) Date: Tue, 09 Feb 2021 19:25:40 GMT Content-Type: image/jpeg Content-Length: 1024 Last-Modified: Tue, 09 Feb 2021 19:03:45 GMT Connection: keep-alive ETag: "6022dc91-400" Accept-Ranges: bytes因为在之前的配置中,我们并没有添加 image/jpeg。
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