浅谈前后端分离中nginx的应用

#user  nobody;
worker_processes  1;

#error_log  logs/error.log;
#error_log  logs/error.log  notice;
#error_log  logs/error.log  info;

#pid        logs/nginx.pid;


events {
    worker_connections  1024;
}


http {
    include       mime.types;
    default_type  application/octet-stream;

    #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  logs/access.log  main;

    sendfile        on;
    #tcp_nopush     on;

    #keepalive_timeout  0;
    keepalive_timeout  65;

    #gzip  on;

    server {
        listen       80;
        server_name  localhost;

        #charset koi8-r;

        #access_log  logs/host.access.log  main;

       #location / {
        #    root   html;
        #    index  index.html index.htm;
        #}
		
		###############ldweb
		location / {
			proxy_pass              http://127.0.0.1:8086;
			proxy_redirect          off;
            proxy_set_header        Some-Thing $http_x_custom_header;
            proxy_set_header        Accept-Encoding 'gzip';
            proxy_set_header        Host $host:$server_port;
            proxy_set_header        X-Real-IP $remote_addr;
            proxy_set_header        X-Forwarded-For $proxy_add_x_forwarded_for;
            client_max_body_size    2m;
            client_body_buffer_size 500k;
            proxy_buffer_size       128k;
            proxy_buffers           8 128k;
            proxy_busy_buffers_size 256k;
            proxy_temp_file_write_size 1024k;
		}	 
        ###############ldweb
		
		###############ldapi
		location /firstvuelast/ {
			proxy_pass              http://127.0.0.1:8001/firstvuelast/;
			proxy_redirect          off;
            proxy_set_header        Some-Thing $http_x_custom_header;
            proxy_set_header        Accept-Encoding 'gzip';
            proxy_set_header        Host $host:$server_port;
            proxy_set_header        X-Real-IP $remote_addr;
            proxy_set_header        X-Forwarded-For $proxy_add_x_forwarded_for;
            client_max_body_size    2m;
            client_body_buffer_size 500k;
            proxy_buffer_size       128k;
            proxy_buffers           8 128k;
            proxy_busy_buffers_size 256k;
            proxy_temp_file_write_size 1024k;
		}	 
        ###############ldapi
		
		
		#location ^~/proxy/html/{
		#rewrite ^/proxy/html/(.*)$ /$1 break;
		#proxy_pass http://localhost:8086;
		#}
        #error_page  404              /404.html;

        # redirect server error pages to the static page /50x.html
        #
        error_page   500 502 503 504  /50x.html;
        location = /50x.html {
            root   html;
        }

        # proxy the PHP scripts to Apache listening on 127.0.0.1:80
        #
        #location ~ \.php$ {
        #    proxy_pass   http://127.0.0.1;
        #}

        # pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000
        #
        #location ~ \.php$ {
        #    root           html;
        #    fastcgi_pass   127.0.0.1:9000;
        #    fastcgi_index  index.php;
        #    fastcgi_param  SCRIPT_FILENAME  /scripts$fastcgi_script_name;
        #    include        fastcgi_params;
        #}

        # deny access to .htaccess files, if Apache's document root
        # concurs with nginx's one
        #
        #location ~ /\.ht {
        #    deny  all;
        #}
    }


    # another virtual host using mix of IP-, name-, and port-based configuration
    #
    #server {
    #    listen       8000;
    #    listen       somename:8080;
    #    server_name  somename  alias  another.alias;

    #    location / {
    #        root   html;
    #        index  index.html index.htm;
    #    }
    #}


    # HTTPS server
    #
    #server {
    #    listen       443 ssl;
    #    server_name  localhost;

    #    ssl_certificate      cert.pem;
    #    ssl_certificate_key  cert.key;

    #    ssl_session_cache    shared:SSL:1m;
    #    ssl_session_timeout  5m;

    #    ssl_ciphers  HIGH:!aNULL:!MD5;
    #    ssl_prefer_server_ciphers  on;

    #    location / {
    #        root   html;
    #        index  index.html index.htm;
    #    }
    #}

}

下载nginx压缩包，然后解压，打开windows命令行控制台，然后进入到nginx解压缩的路径里面，然后启动nginx。输入

nginx start,看任务管理器里面的详细信息会看到有两个nginx的进程。

然后我们打开

下图

在nginx.conf里面配置前后端的访问路劲，上面的ldweb代表前端的访问接口，ldapi代表后端的访问接口。前端我的ajax请求如下

onClickLast: function () {
      // 可选地，上面的请求可以这样做
      axios.get('/firstvuelast/users/userlist', {dataType: 'jsonp'})
        .then(function (response) {
          console.log(response.data)
        })
        .catch(function (error) {
          console.log(error)
        })
    }

我这个是访问后端的users/userlist路径下的方法

@RestController
@RequestMapping(value = "/users")
public class UserControler {
    @Autowired
    private UserService userService;
    @GetMapping("/userlist")
    public Result<User> selectUserList(HttpServletRequest request){
        List<User> userList=userService.selectUserList();
        return ResultUtil.success(userList);
    }

}

控制台就可以打印出从后台获取的json值。

前端访问地址：http://localhost:8086/

后端访问地址：http://localhost:8081/firstvuelast/

前端访问的端口号是nginx的端口号80.

前后端现在都是监听nginx服务器，由nginx进行跨域请求访问