stash/utils/image.go

43 lines
1.0 KiB
Go

package utils
import (
"encoding/base64"
"fmt"
"regexp"
)
func ProcessBase64Image(imageString string) (string, []byte, error) {
if imageString == "" {
return "", nil, fmt.Errorf("empty image string")
}
regex := regexp.MustCompile(`^data:.+\/(.+);base64,(.*)$`)
matches := regex.FindStringSubmatch(imageString)
var encodedString string
if len(matches) > 2 {
encodedString = regex.FindStringSubmatch(imageString)[2]
} else {
encodedString = imageString
}
imageData, err := GetDataFromBase64String(encodedString)
if err != nil {
return "", nil, err
}
return MD5FromBytes(imageData), imageData, nil
}
func GetDataFromBase64String(encodedString string) ([]byte, error) {
return base64.StdEncoding.DecodeString(encodedString)
}
func GetBase64StringFromData(data []byte) string {
return base64.StdEncoding.EncodeToString(data)
// Really slow
//result = regexp.MustCompile(`(.{60})`).ReplaceAllString(result, "$1\n")
//if result[len(result)-1:] != "\n" {
// result += "\n"
//}
//return result
}