added helper to load log operators from file

1 files changed, 15 insertions, 0 deletions

diff --git a/server/descriptor/descriptor.go b/server/descriptor/descriptor.go
index 016d1cc..6e46790 100644
--- a/server/descriptor/descriptor.go
+++ b/server/descriptor/descriptor.go
@@ -6,6 +6,8 @@ import (
 
 	"crypto/tls"
 	"encoding/base64"
+	"encoding/json"
+	"io/ioutil"
 )
 
 const (
@@ -40,3 +42,16 @@ func FindLog(ops []Operator, logId []byte) (*Log, error) {
 	}
 	return nil, fmt.Errorf("no such log: %s", base64.StdEncoding.EncodeToString(logId))
 }
+
+// LoadOperators loads a list of json-encoded log operators from a given path
+func LoadOperators(path string) ([]Operator, error) {
+	blob, err := ioutil.ReadFile(path)
+	if err != nil {
+		return nil, fmt.Errorf("failed reading log operators: %v", err)
+	}
+	var ops []Operator
+	if err := json.Unmarshal(blob, &ops); err != nil {
+		return nil, fmt.Errorf("failed decoding log operators: %v", err)
+	}
+	return ops, nil
+}