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「はじめてのGo言語」でhttpパッケージが動かなかったので、ググってみた

Posted at

「はじめてのGo言語を読んで、httpパッケージサンプルが動かなかったので、調べてみました。

動かなかった原因はHandelFuncが、ConnではなくResponseWriterを使うようになったからなのかなぁ。

http.go
package main                                                                    

import (
    "io"
    "net/http"
)

// ResponseWriter is interface as
//  Header()  Header
//  Write([]byte)(int,error)
//  iWriteHeder(statuscoe int)

// WriteString is function as
// func WriteString(w Writer, s string) (n int, err error)

// Writer is interface as
// Write(p []byte) (n int, err error)

// 原著で動かない部分
// func ServeHoge(conn *http.Conn, req *http.Request){
//     io.WriteString(conn, "hello")
//

func ServeHoge(w http.ResponseWriter, _ *http.Request) {
    io.WriteString(w, "hello! this is hoge server\n")
}

func main() {
    http.HandleFunc("/hoge", ServeHoge)

    http.ListenAndServe(":12345", nil)
}
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