Use RS256 to sign JWT token.

util/string.go

@@ -19,6 +19,7 @@ import (
 	"encoding/hex"
 	"errors"
 	"fmt"
+	"io/ioutil"
 	"strconv"
 	"strings"
 
@@ -95,3 +96,35 @@ func GetMinLenStr(strs ...string) string {
 	}
 	return strs[i]
 }
+
+func ReadStringFromPath(path string) string {
+	data, err := ioutil.ReadFile(path)
+	if err != nil {
+		panic(err)
+	}
+
+	return string(data)
+}
+
+func WriteStringToPath(s string, path string) {
+	err := ioutil.WriteFile(path, []byte(s), 0644)
+	if err != nil {
+		panic(err)
+	}
+}
+
+func ReadBytesFromPath(path string) []byte {
+	data, err := ioutil.ReadFile(path)
+	if err != nil {
+		panic(err)
+	}
+
+	return data
+}
+
+func WriteBytesToPath(b []byte, path string) {
+	err := ioutil.WriteFile(path, b, 0644)
+	if err != nil {
+		panic(err)
+	}
+}