base64转换为图片

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package main   import (     "encoding/base64"     "io/ioutil"     "os"     "strings" )   func main() {     cc, _ := ioutil.ReadFile("a.png.txt")     //解压     i := strings.Index(string(cc), ",")     cc = cc[i+1:]     dist, _ := base64.StdEncoding.DecodeString(string(cc))     //写入新文件     f, _ := os.OpenFile("b.png", os.O_RDWR|os.O_CREATE, os.ModePerm)     defer f.Close()     f.Write(dist)   }

　a.png.txt

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data:image/png;base64,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