执行对Tomcat的proxy_pass时，Nginx如何添加子域作为参数

答案比这简单。只需获取具有子域的子字符串，并将其用作proxy_pass的参数即可：

server {    # this matches every subdomain of domain.  server_name .domain;  location / {set $new_request_uri "";        set $subdomain "";    if ($host ~* "^(.+).domain$") {  set $subdomain $1;   # lets assume there are args...      set $new_request_uri "$request_uri&subdomain=$subdomain";      }         # if there are no args add a question mark and the subdomain argument    if ($args = '') {      set $new_request_uri "$request_uri?subdomain=$subdomain";      }    proxy_pass http://127.0.0.1:8080$new_request_uri;     }       }

我考虑了带或不带参数的请求。我认为这可以解决您的问题。