DonRichie commented on issue #161:
URL:
https://github.com/apache/openwhisk-runtime-go/issues/161#issuecomment-1043697443
**Here is my best try using a struct, but it fails due to the wrong function
signature:**
```
package main
import (
"fmt"
"encoding/json"
)
type WhiskResponse struct {
body string
statusCode int
headers map[string]interface{}
}
func PrettyPrint(v interface{}) (err error) {
b, err := json.MarshalIndent(v, "", " ")
if err == nil {
fmt.Println(string(b))
}
return
}
func Main(inobj map[string]interface{}) map[string]interface{} {
fmt.Println("inobj:")
PrettyPrint(inobj)
// assemble response
resp := WhiskResponse{}
resp.headers["Content-Type"] = "text/html"
resp.statusCode = 201
resp.body = "123"
fmt.Println("resp:")
PrettyPrint(resp)
res, err := json.Marshal(resp)
if err != nil {
fmt.Println(err)
}
return string(res)
}
```
**error:**
```
./exec__.go:37:16: cannot use string(res) (type string) as type
map[string]interface {} in return argument
```
**error if changing function signature to "func Main(inobj
map[string]interface{}) string {":**
```
./main__.go:56:9: cannot use Main (type func(map[string]interface {})
string) as type Action in assignment
```
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