nginx 前后端分离 代理转发，解决跨域问题

场景

1. 适用于公司有前端，项目采用前后端分离。类似于我们 后端 springboot 提供接口，前端专门写html调用相应的接口，解决跨域问题

配置说明

worker_processes  1;

events {
    worker_connections  10240;
}

http {
    include       mime.types;
    default_type  application/octet-stream;
    client_max_body_size 200M;
    client_header_buffer_size 8k;
    large_client_header_buffers 8 16k;

    log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
                      '$status $body_bytes_sent "$http_referer" '
                      '"$http_user_agent" "$http_x_forwarded_for"';

    access_log  on;

    sendfile        on;

    keepalive_timeout  300;

    gzip  on;
    gzip_http_version 1.0;
    gzip_disable "MSIE [1-6].";
    gzip_types text/plain application/x-javascript text/css text/javascript;

    server {
        listen       80;
        server_name  localhost;
        client_header_buffer_size 8k;
        large_client_header_buffers 8 16k;

        root   /usr/share/nginx/html;

          location / {

              # 把跟路径下的请求转发给前端工具链（如gulp,webstorm,anywhere）打开的开发服务器
              # 如果是产品环境，则使用root等指令配置为静态文件服务器
              # proxy_pass http://localhost:80;

              #proxy_redirect default;
          }

      location /management/ {
          # 把 /api 路径下的请求转发给真正的后端服务器
        proxy_pass http://192.168.199.131:8090/management/;
          proxy_cookie_path  /management/ /;
        proxy_set_header   Host    $host;
        proxy_set_header Cookie $http_cookie;
        proxy_set_header   Remote_Addr    $remote_addr;
        proxy_set_header   X-Real-IP    $remote_addr;
        proxy_set_header   X-Forwarded-For  $proxy_add_x_forwarded_for;

          client_max_body_size 200m;

          proxy_connect_timeout 18000;

          proxy_send_timeout 18000;

          proxy_read_timeout 18000;
        }

      location /agents/ {
        proxy_pass http://192.168.199.131:8092/;
          proxy_cookie_path  /agents/ /;
        proxy_set_header   Host    $host;
        proxy_set_header Cookie $http_cookie;
        proxy_set_header   Remote_Addr    $remote_addr;
        proxy_set_header   X-Real-IP    $remote_addr;
        proxy_set_header   X-Forwarded-For  $proxy_add_x_forwarded_for;

        client_max_body_size 200m;

        proxy_connect_timeout 18000;

        proxy_send_timeout 18000;

        proxy_read_timeout 18000;
      }

    }
}

重点说明 location 的配置 。

比如前端html请求地址 http://localhost:80/index.html

前端调用接口的地址为 http://localhost:80/api 其实api并不在改域下，在http://192.168.199.111:8888/ 下 则需要解决2个问题 前端ajax跨域与接口转发到相应位置

** 着重看 1 2 3 **

     location /api/ {  // 1
    proxy_pass http://192.168.199.111:8888/; // 2
      proxy_cookie_path  /api/ /; // 3
    proxy_set_header   Host    $host;
    proxy_set_header Cookie $http_cookie; // 发送cookie 解决 session 一致性问题
    proxy_set_header   Remote_Addr    $remote_addr;
    proxy_set_header   X-Real-IP    $remote_addr;
    proxy_set_header   X-Forwarded-For  $proxy_add_x_forwarded_for;

    client_max_body_size 200m;

    proxy_connect_timeout 18000;

    proxy_send_timeout 18000;

    proxy_read_timeout 18000;
  }

}

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