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chroma をつかってコードハイライトを生成するサンプル

Last updated at Posted at 2019-01-26

go のコードの一部です。

type Ping struct {
	Status int
	Result string
}

func Sample(w http.ResponseWriter, r *http.Request) {
	lexer := lexers.Get("ruby")
	style := styles.Get("monokai")
	if style == nil {
		style = styles.Fallback
	}
	formatter := html.New(html.WithClasses())
	iterator, err := lexer.Tokenise(nil, "def hoge; x=3; 6; end")
	buf := new(bytes.Buffer)
	err = formatter.Format(buf, style, iterator)
	if err != nil {
		fmt.Println(err)
	}

	sourceCode := buf.String()
	ping := Ping{http.StatusOK, sourceCode}
	res, _ := json.Marshal(ping)
	w.Header().Set("Content-Type", "application/json")
	w.Write(res)
}

これで、以下のような json を得る。

image.png

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