Extract base64-encoded github.Blob

extract_github_blob.go

import (
	"encoding/base64"
	"errors"
	"fmt"
	"github.com/google/go-github/github"
)

// Extract a Blob with arbitrary encoding into a byte array
func ExtractBlob(blob *github.Blob) (*[]byte, error) {
	bytes := []byte(*blob.Content)
	switch *blob.Encoding {
	case "utf-8":
		return &bytes, nil
	case "base64":
		decoded := make([]byte, base64.StdEncoding.DecodedLen(len(bytes)))
		base64.StdEncoding.Decode(decoded, bytes)
		
		unpadded := decoded[:*blob.Size]
		return &unpadded, nil
	default:
		return nil, errors.New(fmt.Sprintf("Unknown encoding for github blob'%s'", *blob.Encoding))
	}
}