不同文件后缀返回不同 Content-Type 并修改响应内容追加脚本

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server {
   listen xxx;
   server_name xx;


    location  / {
        proxy_pass http://xxx;
        proxy_redirect off;
	    proxy_set_header   Host             $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        
        if ($request_uri  ~*  .*/raw/.*\.html$) {
           add_header  Content-Type 'text/html; charset=utf-8';
        }

        sub_filter '</body>' '<script src="xxx.js"></script></body>';
        sub_filter_once on;
        
        if ($request_uri  ~*  .*/raw/.*\.css$) {
            add_header  Content-Type 'text/css; charset=utf-8';
        }
        if ($request_uri  ~*  .*/raw/.*\.js$) {
            add_header  Content-Type 'application/x-javascript';
        }
        if ($request_uri  ~*  .*/raw/.*\.svg$) {
            add_header  Content-Type 'image/svg+xml';
        }
    }
}