shuaijinchao commented on issue #69:
URL: 
https://github.com/apache/apisix-go-plugin-runner/issues/69#issuecomment-1049448483


   @RagavMaddali I have not reproduced the problem in my development 
environment.
   
   Below is my configuration:
   
   ### APISIX Route
   
   ```bash
   curl http://127.0.0.1:9080/apisix/admin/routes/1 -H 'X-API-KEY: 
edd1c9f034335f136f87ad84b625c8f1' -X PUT -d '
   {
     "uri": "/go/runner",
     "plugins": {
       "ext-plugin-pre-req": {
         "conf": [
           { "name": "say", "value":"{\"body\":\"hello\"}"}
         ]
       }
     },
     "upstream": {
           "type": "roundrobin",
           "nodes": {
               "127.0.0.1:1980": 1
           }
       }
   }'
   ```
   
   ### Plugin
   ```Go
   func init() {
        err := plugin.RegisterPlugin(&Say{})
        if err != nil {
                log.Fatalf("failed to register plugin say: %s", err)
        }
   }
   
   // Say is a demo to show how to return data directly instead of proxying
   // it to the upstream.
   type Say struct {
   }
   
   type SayConf struct {
        Body string `json:"body"`
   }
   
   func (p *Say) Name() string {
        return "say"
   }
   
   func (p *Say) ParseConf(in []byte) (interface{}, error) {
        conf := SayConf{}
        err := json.Unmarshal(in, &conf)
        return conf, err
   }
   
   func (p *Say) Filter(conf interface{}, w http.ResponseWriter, r 
pkgHTTP.Request) {
        body := conf.(SayConf).Body
        if len(body) == 0 {
                return
        }
   
        r.Header().Set("X-A6-Runner", "Go")
        r.Header().Set("X-A6-Hello", "World")
   }
   ```
   
   ### Request & Response
   ```bash
   $ curl http://127.0.0.1:9080/go/runner                                       
                                                                                
                                                         
   ---Headers
   x-a6-runner:Go
   x-a6-hello:World
   host:127.0.0.1:9080
   x-real-ip:127.0.0.1
   x-forwarded-for:127.0.0.1
   x-forwarded-proto:http
   x-forwarded-host:127.0.0.1
   x-forwarded-port:9080
   user-agent:curl/7.68.0
   accept:*/*
   ---Args
   ---URI
   /go/runner
   ---Service Node
   Ubuntu-DEV-1980
   ```
   
   Note: If you want to forward the request headers set in the Runner to the 
upstream, do not manipulate the `http.ResponseWriter` object, it will terminate 
the request.


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