added export and import as base64 string function (#242)

utilities/export.go

@@ -2,7 +2,7 @@ package utilities
 
 import (
 	"bytes"
-
+	"encoding/base64"
 	"github.com/ahmdrz/goinsta"
 )
 
@@ -14,3 +14,14 @@ func ExportAsBytes(insta *goinsta.Instagram) ([]byte, error) {
 	}
 	return buffer.Bytes(), nil
 }
+
+// ExportAsBase64String exports selected *Instagram object as base64 encoded string
+func ExportAsBase64String(insta *goinsta.Instagram) (string, error) {
+	bytes, err := ExportAsBytes(insta)
+	if err != nil {
+		return "", err
+	}
+
+	sEnc := base64.StdEncoding.EncodeToString(bytes)
+	return sEnc, nil
+}

utilities/import.go

@@ -2,10 +2,22 @@ package utilities
 
 import (
 	"bytes"
-
+	"encoding/base64"
 	"github.com/ahmdrz/goinsta"
 )
 
 func ImportFromBytes(inputBytes []byte) (*goinsta.Instagram, error) {
 	return goinsta.ImportReader(bytes.NewReader(inputBytes))
 }
+
+// ImportFromBase64String imports instagram configuration from a base64 encoded string.
+//
+// This function does not set proxy automatically. Use SetProxy after this call.
+func ImportFromBase64String(base64String string) (*goinsta.Instagram, error) {
+	sDec, err := base64.StdEncoding.DecodeString(base64String)
+	if err != nil {
+		return nil, err
+	}
+
+	return ImportFromBytes(sDec)
+}