1. 问题

在某个测试环境中，get请求调用时出现下面的异常。

image.png

而应用代码：

@Slf4j
@RestController
public class TestNginx {

    @GetMapping("sendNginx")
    public String sendEvent(@RequestParam("id") String id) {

        log.info(id);
        log.info("请求成功进入");
        return "success"+id;
    }

}

配置文件：

server:
  port: 8089
  servlet:
    context-path: /study

当然，不通过nginx调用服务没有出现这个情况；

2. 解决方案

推测是nginx问题。

nginx.conf配置

user 用户名 用户组;
#worker_processes  1;

#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  /Users/yexuerui/Documents/nginxlog/access.log  main;

    sendfile        on;
    #tcp_nopush     on;

    #keepalive_timeout  0;
    keepalive_timeout  65;

    #gzip  on;

    server {
        listen       8080;
        server_name  localhost;

        #charset koi8-r;
        
        #access_log  logs/host.access.log  main;

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

        #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;
        }

 
    }

    include servers/*;
}

去servers目录下读取conf配置：

问题配置.png

1. 注意$1和$2表示的含义；
2. proxy_pass 和upstream的关系；

原因在于，当location存在正则匹配时，get请求会丢失参数

解决方案：
在正则的location的proxy_pass后加?$args。

server {
        listen       8083;
#        server_name test.one.cn;
        access_log  /Users/xxx/Documents/nginxlog/local.log  main;
        error_log  /Users/xxx/Documents/nginxlog/local-error.log  debug_http;
     location ~*^/(273|251)study/(.*) {
      # 不使用改配置upstream中有_tomcat会出现异常。
        proxy_set_header Host $host;
    proxy_pass http://webchat_study_$1/study/$2?$args;
    }
    location /271study {
        proxy_redirect off;
        keepalive_timeout 300s 300s;
        keepalive_requests 100;
        client_max_body_size 300m;
        client_body_buffer_size 128k;
        proxy_connect_timeout 3000s;
        proxy_read_timeout 3000s;
        proxy_send_timeout 3000s;
        proxy_set_header Host $host;
        proxy_set_header Referer $http_referer;
        proxy_set_header Cookie $http_cookie;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_http_version 1.1;
        proxy_set_header Connection "";
        proxy_pass http://webchat_study_271/study/;
    }
}

upstream webchat_study_271 {
    server 127.0.0.1:8089;
    keepalive 16;
}


upstream webchat_study_273{
    server 127.0.0.1:8089;
}