去编译器未定义的方法

Question

I am getting a compiler error "w.Write undefined (type rest.ResponseWriter has no field or method Write)"

I created a bare bones test file and have the same problem:

package server

import (
        "github.com/ant0ine/go-json-rest/rest"
)

func WriteTest(w rest.ResponseWriter) {
        var bs []byte
        w.Write(bs)
}

The method that the compiler says is not defined is definitely in the rest package.

Answer 1

The rest.ReponseWriter type has no Write, it has the following methods:

Header
WriteJson
EncodeJson
WriteHeader

However, it says in the comments that http.ResponseWriter methods are available by type assertion. So you should be able to write the following:

package server

import (
        "github.com/ant0ine/go-json-rest/rest"
        "net/http"
)

func WriteTest(w rest.ResponseWriter) {
        var bs []byte
        w.(http.ResponseWriter).Write(bs)
}