[GitHub] [apisix] nanamikon commented on issue #3565: request help: Support customizing the body when response exits

[GitBox <gi...@apache.org>]

nanamikon commented on issue #3565:
URL: https://github.com/apache/apisix/issues/3565#issuecomment-775712478


   Refer to custom-error-pages feature provided by Ingress
   https://kubernetes.github.io/ingress-nginx/user-guide/custom-errors/
   
   Using a docker image as backend to deal with specific error code,  and pass params through header
   ```
   location @custom_upstream-default-backend_500 {
      internal;
      
      proxy_intercept_errors off;
      
      proxy_set_header       X-Code             500;
      proxy_set_header       X-Format           $http_accept;
      proxy_set_header       X-Original-URI     $request_uri;
      proxy_set_header       X-Namespace        $namespace;
      proxy_set_header       X-Ingress-Name     $ingress_name;
      proxy_set_header       X-Service-Name     $service_name;
      proxy_set_header       X-Service-Port     $service_port;
      proxy_set_header       X-Request-ID       $req_id;
      proxy_set_header       Host               $best_http_host;
      
      set $proxy_upstream_name upstream-default-backend;
      
      rewrite                (.*) / break;
      
      proxy_pass            http://upstream_balancer;
      log_by_lua_block {
       
       monitor.call()
       
      }
     }
   
   ``` 
   
   I think we can use header too，  and list all support headers in doc for extension


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