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parlay.go
51 lines (47 loc) · 996 Bytes
/
parlay.go
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package parlay
import (
"encoding/base64"
"errors"
"fmt"
"io/ioutil"
"mime"
"net/http"
"path/filepath"
"strings"
)
func FromURL(u string) (string, error) {
r, err := http.Get(u)
if err != nil {
return "", err
}
defer r.Body.Close()
if r.StatusCode != http.StatusOK {
return "", errors.New(r.Status)
}
b, err := ioutil.ReadAll(r.Body)
if err != nil {
return "", err
}
m := r.Header.Get("Content-Type")
if m == "" {
return "", errors.New("Unspecified Content-Type.")
}
return FromBytes(b, m), nil
}
func FromPath(path string) (string, error) {
if path == "" {
return "", errors.New("No path specified.")
}
b, err := ioutil.ReadFile(path)
if err == nil {
m := strings.Replace(
mime.TypeByExtension(filepath.Ext(path)), " ", "", -1,
)
return FromBytes(b, m), nil
}
return "", err
}
func FromBytes(data []byte, mimeType string) string {
encoded := base64.StdEncoding.EncodeToString(data)
return fmt.Sprintf(`data:%s;base64,%s`, mimeType, encoded)
}