[ DeWeb使用技巧 ] DeWeb服务器使用Nginx反向代理时如何实现sse?

使用SSE实现服务器端主动推送功能，本地开发响应速度流畅，但部署到服务器后，不能创建SSE服务。
经排查，服务器中部署在nginx中，在配置中添加以下SSE配置项后解决

# SSE support
proxy_buffering off;
proxy_cache off;
proxy_read_timeout 86400s;
proxy_send_timeout 86400s;

完整的nginx配置文件如下

#user  nobody;
worker_processes 4;
#error_log  logs/error.log;
#error_log  logs/error.log  notice;
#error_log  logs/error.log  info;
#pid        logs/nginx.pid;
events {
     worker_connections 40960;
}
http {
    include       mime.types;
    default_type  application/octet-stream;
	
	#反向代理配置 
	upstream server_list{
		ip_hash;
		server 127.0.0.1:8080;
		server 127.0.0.1:8081;
		server 127.0.0.1:8082;
		server 127.0.0.1:8083;
		server 127.0.0.1:8084;
		server 127.0.0.1:8085;
		server 127.0.0.1:8086;
		server 127.0.0.1:8087;
		server 127.0.0.1:8088;
		server 127.0.0.1:8089;
	}
	
	
	server{
		listen 443 ssl;
		server_name doc.delphibbs.com;
		
		index ssl.html ;
		ssl_certificate      	c:/ssl/delphibbs.com.crt;
		ssl_certificate_key 	c:/ssl/delphibbs.com.key;
		ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
		ssl_ciphers ALL:!DH:!EXPORT:!RC4:+HIGH:+MEDIUM:!eNULL;
		ssl_prefer_server_ciphers on;
		

        location / {
			proxy_pass  http://127.0.0.1:3000;
        }
	}
	server{
		listen 80;
		server_name doc.delphibbs.com;
		
        location / {
			proxy_pass  http://127.0.0.1:3000;
        }
	}
	
	server{
		listen 443 ssl;
		server_name bbs.delphibbs.com;
		
		index ssl.html ;
		ssl_certificate      	c:/ssl/delphibbs.com.crt;
		ssl_certificate_key 	c:/ssl/delphibbs.com.key;
		ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
		ssl_ciphers ALL:!DH:!EXPORT:!RC4:+HIGH:+MEDIUM:!eNULL;
		ssl_prefer_server_ciphers on;
		

        location / {
			rewrite ^(/.*)$ https://www.delphibbs.com/bbs; 
        }
	}
	
	server{
		listen 80;
		server_name bbs.delphibbs.com;
		
        location / {
			rewrite ^(/.*)$ https://www.delphibbs.com/bbs; 
        }
	}
	
	server{
		listen 80;
		server_name delphibbs.com www.delphibbs.com;
		
		
        location / {
            tcp_nodelay     on;
            proxy_set_header Host            $host;
            proxy_set_header X-Real-IP       $remote_addr;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
            #以上三行，目的是将代理服务器收到的用户的信息传到真实服务器上

			proxy_pass  http://server_list;

			# SSE support
            proxy_buffering off;
            proxy_cache off;
            proxy_read_timeout 86400s;
            proxy_send_timeout 86400s;
        }

		location /doc {
			proxy_pass  http://127.0.0.1:3000/;
		}
	} 
	server{
		listen 443 ssl;
		server_name delphibbs.com www.delphibbs.com;
		
		index ssl.html ;
		ssl_certificate      	c:/ssl/delphibbs.com.crt;
		ssl_certificate_key 	c:/ssl/delphibbs.com.key;
		ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
		ssl_ciphers ALL:!DH:!EXPORT:!RC4:+HIGH:+MEDIUM:!eNULL;
		ssl_prefer_server_ciphers on;
		
        location / {
            tcp_nodelay     on;
            proxy_set_header Host            $host;
            proxy_set_header X-Real-IP       $remote_addr;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
            #以上三行，目的是将代理服务器收到的用户的信息传到真实服务器上

			proxy_pass  http://server_list;

			# SSE support
            proxy_buffering off;
            proxy_cache off;
            proxy_read_timeout 86400s;
            proxy_send_timeout 86400s;
        }

		location /doc {
			proxy_pass  http://127.0.0.1:3000/;
		}
	}


    #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;
    # another virtual host using mix of IP-, name-, and port-based configuration
    #
    #server {
    #    listen       443;
    #    listen       somename:8080;
    #    server_name  somename  alias  another.alias;
    #    location / {
    #        root   html;
    #        index  index.html index.htm;
    #    }
    #}
    map $time_iso8601 $logdate {
        '~^(?<ymd>\\d{4}-\\d{2}-\\d{2})' $ymd;
        default                       'date-not-found';
    }
	include vhosts/*.conf;
    # 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;
    #    }
    #}
     client_max_body_size 50m;
     client_body_buffer_size 60k;
     client_body_timeout 60;
     client_header_buffer_size 64k;
     client_header_timeout 60;
     error_page 400 /error/400.html;
     error_page 403 /error/403.html;
     error_page 404 /error/404.html;
     error_page 500 /error/500.html;
     error_page 501 /error/501.html;
     error_page 502 /error/502.html;
     error_page 503 /error/503.html;
     error_page 504 /error/504.html;
     error_page 505 /error/505.html;
     error_page 506 /error/506.html;
     error_page 507 /error/507.html;
     error_page 509 /error/509.html;
     error_page 510 /error/510.html;
     
     keepalive_requests 100;
     large_client_header_buffers 4 64k;
     reset_timedout_connection on;
     send_timeout 60;
     sendfile_max_chunk 512k;
     server_names_hash_bucket_size 256;
}
     error_log C:/phpstudy_pro/WWW crit;
     worker_rlimit_nofile 100000;

注：服务器DeWebServer需要使用2024-10-29以后版本！