refresh handler

config.go

@@ -1,5 +1,11 @@
 package main
 
+import (
+	"fmt"
+
+	"github.com/BurntSushi/toml"
+)
+
 type Config struct {
 	MirrorRoot string
 	MirrorURL  string
@@ -19,3 +25,31 @@ func NewConfig() *Config {
 		Auth:       AuthConfig{Token: "FakeToken"},
 	}
 }
+
+func ReadConfig(path string) (*Config, error) {
+
+	var cfg Config
+	_, err := toml.DecodeFile(path, &cfg)
+	if err != nil {
+		return nil, fmt.Errorf("Error loading config from %s: %w", path, err)
+	}
+
+	if err = cfg.validate(); err != nil {
+		return nil, fmt.Errorf("invalid config: %w", err)
+	}
+
+	return &cfg, nil
+}
+
+func (c *Config) validate() error {
+	if c.MirrorRoot == "" {
+		return fmt.Errorf("cache root is required")
+	}
+	if c.MirrorURL == "" {
+		return fmt.Errorf("mirror url is required")
+	}
+	if c.Port == "" {
+		c.Port = "8090"
+	}
+	return nil
+}