nginx定义客户端请求的相关配置:

1、keepalive_timeout:

　　长连接超时时间
　　Default: keepalive_timeout 75s;
　　Context: http, server, location
　　

　　示例：在响应头显示此首部字段
　　keepalive_timeout 60 60;

示例：

[root@centos7.6 ~]# curl -I www.magedu.tech
HTTP/1.1 200 OK
Server: nginx/1.16.1
Date: Wed, 03 Mar 2021 03:10:03 GMT
Content-Type: text/html
Content-Length: 24
Last-Modified: Thu, 25 Feb 2021 06:59:03 GMT
Connection: keep-alive
ETag: "60374ab7-18"
Accept-Ranges: bytes
修改配置：
[root@centos7.6 ~]# vi /etc/nginx/conf.d/test.conf
server {
        listen 80;
        server_name www.magedu.tech;
        root /opt/testdir/;
        keepalive_timeout 65 50;
}
验证：
[root@centos7.6 ~]# curl -I www.magedu.tech
HTTP/1.1 200 OK
Server: nginx/1.16.1
Date: Wed, 03 Mar 2021 03:10:51 GMT
Content-Type: text/html
Content-Length: 24
Last-Modified: Thu, 25 Feb 2021 06:59:03 GMT
Connection: keep-alive
Keep-Alive: timeout=50   #实际65
ETag: "60374ab7-18"
Accept-Ranges: bytes

2、keepalive_requests number;

　　

　　在一次长连接上所允许请求的资源的最大数量，默认为100
　　Default: keepalive_requests 100;
　　Context: http, server, location
　　This directive appeared in version 0.8.0.

示例：

修改配置：
[root@centos7.6 ~]# vi /etc/nginx/conf.d/test.conf
server {
        listen 80;
        server_name www.magedu.tech;
        root /opt/testdir/;
        keepalive_timeout 65 50;
        keepalived_requests 2;
}
验证：长连接接收2次请求后自动断开
[root@centos7.6 ~]# telnet www.magedu.tech 80
Trying 10.0.0.125...
Connected to www.magedu.tech.
Escape character is '^]'.
GET / HTTP/1.1
host: www.magedu.tech

HTTP/1.1 200 OK
Server: nginx/1.16.1
Date: Wed, 03 Mar 2021 03:15:00 GMT
Content-Type: text/html
Content-Length: 24
Last-Modified: Thu, 25 Feb 2021 06:59:03 GMT
Connection: keep-alive
Keep-Alive: timeout=50
ETag: "60374ab7-18"
Accept-Ranges: bytes

/opt/testdir/index.html
GET / HTTP/1.1
host: www.magedu.tech

HTTP/1.1 200 OK
Server: nginx/1.16.1
Date: Wed, 03 Mar 2021 03:15:03 GMT
Content-Type: text/html
Content-Length: 24
Last-Modified: Thu, 25 Feb 2021 06:59:03 GMT
Connection: close
ETag: "60374ab7-18"
Accept-Ranges: bytes

/opt/testdir/index.html
Connection closed by foreign host.
[root@centos7.6 ~]# 

3、keepalive_disable none | browser ...;

　　对哪种浏览器禁用长连接
　　Default: keepalive_disable msie6;
　　Context: http, server, location

4、send_timeout time;

　　向客户端发送响应报文的超时时长，此处是指两次写操作之间的间隔时长，而非整个响应过程的传输时长

　　Default: send_timeout 60s;
　　Context: http, server, location

5、缓存设置想组合

client_max_body_size size;
　　指定请求报文中实体的最大值，设为0，则不限制，默认1m，超过报413错误
　　Default: client_max_body_size 1m;
　　Context: http, server, location

client_body_buffer_size size;
　　用于接收每个客户端请求报文的body部分的缓冲区大小；默认为16k；超出此大小时，其将被暂存到磁盘上的由下面client_body_temp_path指令所定义的位置
　　Default: client_max_body_size 1m;
　　Context: http, server, location

client_body_temp_path path [level1 [level2 [level3]]];
　　设定存储客户端请求报文的body部分的临时存储路径及子目录结构和数量目录名为16进制的数字；用hash之后的值从后往前截取第1、2、3级作为文件名
　　client_body_temp_path /var/tmp/client_body 1 2 2

说明：
　　1 level1级目录占1位16进制，即2^4=16个目录 0-f
　　2 level2级目录占2位16进制，即2^8=256个目录 00-ff
　　2 level3级目录占2位16进制，即2^8=256个目录 00-ff

[root@centos7.6 ~]# md5sum /etc/fstab 
784610c4b087f5a4dbf18f51699f150a /etc/fstab
假设存储路径是：/var/tmp/client_body/
落磁盘的文件存储路径：/var/tmp/client_body/a/50/f1/
总计可能存在的子目录数量：echo 16*256*256 |bc ---> 1048576