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Golang实时将base64数据转换为图像并发送响应

base64 go

6

Ajey · 技术社区 · 9 年前

img html标记如下:

<img src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABAQMAAAAl21bKAAAAA1BMVEX/TQBcNTh/AAAACklEQVR4nGNiAAAABgADNjd8qAAAAABJRU5ErkJggg==
"/>

Demo

我正在摆弄一个小的golang程序。

例子:

http.HandleFunc("/getImage", imageHandler)

func image(res http.ResponseWriter, req *http.Request) {
    data := "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABAQMAAAAl21bKAAAAA1BMVEX/TQBcNTh/AAAACklEQVR4nGNiAAAABgADNjd8qAAAAABJRU5ErkJggg=="
    // Data is the base64 encoded image
    dec := b64.NewDecoder(b64.StdEncoding, data)
    res.Header().Set("Content-Type", "image/png")
    io.Copy(res, dec)
}

1 回复 | 直到 6 年前

1

10

Cerise Limón 9 年前

问题中的代码很接近。试试这个:

data := "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABAQMAAAAl21bKAAAAA1BMVEX/TQBcNTh/AAAACklEQVR4nGNiAAAABgADNjd8qAAAAABJRU5ErkJggg=="
// The actual image starts after the ","
i := strings.Index(data, ",")
if i < 0 {
    log.Fatal("no comma")
}
// pass reader to NewDecoder
dec := base64.NewDecoder(base64.StdEncoding, strings.NewReader(data[i+1:]))