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Implement custom http.ResponseWriter in golang
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| package main | |
| import ( | |
| "fmt" | |
| "net/http" | |
| ) | |
| type CustomResponseWriter struct { | |
| body []byte | |
| statusCode int | |
| header http.Header | |
| } | |
| func NewCustomResponseWriter() *CustomResponseWriter { | |
| return &CustomResponseWriter{ | |
| header: http.Header{}, | |
| } | |
| } | |
| func (w *CustomResponseWriter) Header() http.Header { | |
| return w.header | |
| } | |
| func (w *CustomResponseWriter) Write(b []byte) (int, error) { | |
| w.body = b | |
| // implement it as per your requirement | |
| return 0, nil | |
| } | |
| func (w *CustomResponseWriter) WriteHeader(statusCode int) { | |
| w.statusCode = statusCode | |
| } | |
| var okFn = func(w http.ResponseWriter, r *http.Request) { | |
| w.WriteHeader(http.StatusOK) | |
| } | |
| func main() { | |
| r := &http.Request{ | |
| Method: http.MethodPost, | |
| } | |
| w := NewCustomResponseWriter() | |
| okFn(w, r) | |
| fmt.Println(w.statusCode) | |
| } |
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