Nginx serves as a static resource web service and performs static resource compression

This article introduces to you about Nginx as a static resource web service and static resource compression. It has certain reference value. Friends in need can refer to it. I hope it will be helpful to you.

1. Static resource web service

##1. Static resource type

2. Static resource service scenario-CDN

## 2. Static resource core configuration

1. File reading sendfile

Sendfile is set to on to indicate efficient startup The mode for transferring files. sendfile allows Nginx to transfer data directly between disk and tcp socket when transferring files. If this parameter is not enabled, it will first apply for a buffer in the user space (Nginx process space), use the read function to read the data from the disk to the cache, then read the buffer in the user space from the cache, and then use the write function to read the data from the user space. The space buffer is written to the kernel buffer and finally to the tcp socket. After turning on this parameter, the data does not need to go through the user buffer.

#Grammar

Syntax: sendfile on | off; Default: sendfile off; Context: http, server, location, if in location

improves the transmission efficiency of network data packets when sendfile is turned on.

That is to say, when tcp_nopush=on, the result is that the data packet will not be transmitted immediately. When the data packet is the largest, it will be transmitted at once. This will help solve the network congestion, although there is a slight delay.

Under the keepalive connection, improve the real-time transmission of network data packets.

Turning on compression can speed up resource response and save network bandwidth resources.

##ngx_http_gzip_module

Syntax

Turn compression on and off

Syntax: gzip on | off; Default: gzip off; Context: http, server, location, if in location

Syntax: gzip_comp_level level; Default: gzip_comp_level 1; Context: http, server, location

Syntax: gzip_http_version 1.0 | 1.1; Default: gzip_http_version 1.1; Context: http, server, location

Compression extension module

Pre-read gzip function ngx_http_gzip_static_module

Syntax: gzip_static on | off | always; Default: gzip_static off; Context: http, server, location

Syntax: gunzip on | off; Default: gunzip off; Context: http, server, location Syntax: gunzip_buffers number size; Default: gunzip_buffers 32 4k|16 8k; Context: http, server, location

1. vim /etc/nginx/conf.d/static.conf

server { #开启sendfile，提高网络包的传输效率 sendfile on; #配置txt|xml资源的路径 location ~ .*\.(txt|xml)$ { #开启压缩 gzip on; gzip_http_version 1.1; gzip_comp_level 1; gzip_types text/plain application/xml; root /vagrant/doc; } }

3. Create the /vagrant/doc/a.txt file and check the file size

[root/etc/nginx]# curl http://www.sina.com.cn/ > /vagrant/doc/a.txt % Total % Received % Xferd Average Speed Time Time Time Current Dload Upload Total Spent Left Speed 100 557k 100 557k 0 0 488k 0 0:00:01 0:00:01 --:--:-- 488k [root/etc/nginx]# ll /vagrant/doc/a.txt -rwxrwxrwx 1 vagrant vagrant 558K 7月 11 10:57 /vagrant/doc/a.txt*

4. Access 192.168.33.88/a.txt through curl and check the http response header information

[root/etc/nginx]# curl -I 192.168.33.88/a.txt -H Accept-Encoding:gzip,defalte HTTP/1.1 200 OK Server: nginx/1.14.0 Date: Wed, 11 Jul 2018 11:01:43 GMT Content-Type: text/plain Last-Modified: Wed, 11 Jul 2018 10:57:22 GMT Connection: keep-alive ETag: W/"5b45e292-8b47f" Content-Encoding: gzip

5. Access 192.168.33.88/a.txt through a browser and use developer tools to check the size of the requested file

It can be seen that after gzip compression, the requested file is compressed from 558K to 148K, and the compression ratio is very high.

6. In addition, you can also check the size of the transferred file through the nginx access.log log

[root/etc/nginx]# tail /var/log/nginx/access.log 192.168.33.1 - - [11/Jul/2018:11:02:46 +0000] "GET /a.txt HTTP/1.1" 200 151549 "-" "Chrome/67.0.3396.99" "-"

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Syntax: tcp_nopush on | off; Default: tcp_nopush off; Context: http, server, location

Syntax: tcp_nodelay on | off; Default: tcp_nodelay off; Context: server, location

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