# 全局配置 
user nginx; # user: 设置nginx服务的系统使用用户
worker_processes auto; # 工作进程数,一般和CPU数量相同
error_log /var/log/nginx/error.log; # nginx的错误日志
pid /run/nginx.pid; # nginx服务启动时的pid

# Load dynamic modules. See /usr/share/doc/nginx/README.dynamic.
include /usr/share/nginx/modules/*.conf;

# 事件配置 
events {
    worker_connections 1024; # 每个进程允许的最大连接数 
}

# http 配置
http {

    log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
                      '$status $body_bytes_sent "$http_referer" '
                      '"$http_user_agent" "$http_x_forwarded_for"'; # 日志记录格式

    access_log  /var/log/nginx/access.log  main; # 默认访问日志

    sendfile            on;  # 启动 sendfile
    tcp_nopush          on;  # tcp_nopush: 懒发送
    tcp_nodelay         on;  
    keepalive_timeout   65;  # 超时时间
    types_hash_max_size 4096; 

    include             /etc/nginx/mime.types; # 文件后缀和类型类型的对应关系
    default_type        application/octet-stream; # 默认content-type

    include /etc/nginx/conf.d/*.conf; # 包含的子配置文件

    # server 配置
    server {
        listen       80; # 监听端口
        listen       [::]:80; 
        server_name  _; # 用域名方式访问的地址
        root         /usr/share/nginx/html; # 静态文件根目录

        location / {
          root /usr/share/nginx/html;
          index index.html index.htm; # 首页的索引文件
        }

        error_page 404 /404.html; # 指定错误页面 🙅‍♂️
        location = /404.html {
        }

        error_page 500 502 503 504 /50x.html; # 把后台错误重定向到静态的50x.html页面
        location = /50x.html {
        }
    }
}

location ~ .*\.(jpg|png|gif)$ {
  gzip off;#关闭压缩
  root /data/www/images;
}

location ~ .*\.(html|js|css)$ {
  gzip_static on;
  gzip on; #启用压缩
  gzip_min_length 1k;    #只压缩超过1K的文件
  gzip_http_version 1.1; #启用gzip压缩所需的HTTP最低版本
  gzip_comp_level 9;     #压缩级别，压缩比率越高文件被压缩的体积越小
  gzip_types  text/css application/javascript;#进行压缩的文件类型
  root /data/www/html;
}

location ~ ^/download {
  gzip_static on; #启用压缩
  tcp_nopush on;  # 不要着急发，攒一波再发
  root /data/www; # 注意此处目录是`/data/www`而不是`/data/www/download`
} 

location ~ .*\.(jpg|png|gif)$ {
    expires 24h;
}

location ~ .*\.json$ {
  add_header Access-Control-Allow-Origin http://127.0.0.1:8080;
  add_header Access-Control-Allow-Methods GET,POST,PUT,DELETE,OPTIONS;
  root /data/json;
}

location ~ ^/api {
    proxy_pass http://localhost:3000;
    proxy_redirect default; #重定向

    proxy_set_header Host $http_host;        #向后传递头信息
    proxy_set_header X-Real-IP $remote_addr; #把真实IP传给应用服务器

    proxy_connect_timeout 30;  #默认超时时间
    proxy_send_timeout 60;    # 发送超时
    proxy_read_timeout 60;    # 读取超时
}

location /a/ {
    proxy_pass http://127.0.0.1/b/;
}
# 请求 http://example.com/a/test.html, 会被代理到 http://127.0.0.1/b/test.html

location /a/ {
    proxy_pass http://127.0.0.1;
}
# 请求 http://example.com/a/test.html, 会被代理到 http://127.0.0.1/a/test.html

location /getName/ {
  rewrite    /getName/([^/]+) /users?name=$1 break;
  proxy_pass http://127.0.0.1;
}

upstream webServer {
  server 127.0.0.1:3000;
  server 127.0.0.1:4000;
  server 127.0.0.1:5000;
}

upstream webServer {
  server 127.0.0.1:3000 down; #不参与负载均衡
  server 127.0.0.1:4000 backup; #充当备份服务器
  server 127.0.0.1:5000 ;
}

# weight
upstream webServer {
  server 127.0.0.1:3000 weight=1;
  server 127.0.0.1:4000 weight=2;
  server 127.0.0.1:5000 weight=4;
}

# ip_hash
upstream webServer {
  ip_hash # [type], type = ip_hash | least_conn | url_hash | fair
  server 127.0.0.1:3000;
}

location [=|~|~*|^~] uri {...}

location @name{...}

location ~ ^/break {
  rewrite ^/break /test break;
  root /data/html;
}

location ~ ^/last {
  rewrite ^/last /test last;
}

location /test {
  default_type application/json;
  return 200 '{"code":0,"msg":"success"}';
}

location ~ ^/redirect {
  rewrite ^/redirect http://www.baidu.com redirect;
}
location ~ ^/permanent {
  rewrite ^/permanent http://www.baidu.com permanent;
}