Fix for Issue 72: Markdown: 500 for YAML metadata

middleware/markdown/metadata.go

@@ -154,6 +154,19 @@ func (y *YAMLMetadataParser) Parse(b []byte) ([]byte, error) {
 	if err := yaml.Unmarshal(b, &m); err != nil {
 		return markdown, err
 	}
+
+	// convert variables (if present) to map[string]interface{}
+	// to match expected type
+	if vars, ok := m["variables"].(map[interface{}]interface{}); ok {
+		vars1 := make(map[string]interface{})
+		for k, v := range vars {
+			if key, ok := k.(string); ok {
+				vars1[key] = v
+			}
+		}
+		m["variables"] = vars1
+	}
+
 	y.metadata.load(m)
 	return markdown, nil
 }

middleware/markdown/metadata_test.go

@@ -35,13 +35,13 @@ var YAML = [4]string{`
 title : A title
 template : default
 variables :
-- name : value
+  name : value
 `,
 	`---
 title : A title
 template : default
 variables :
-- name : value
+  name : value
 ---
 Page content
 `,
@@ -49,7 +49,7 @@ Page content
 title : A title
 template : default
 variables :
-- name : value
+  name : value
 `,
 	`title : A title template : default variables : name : value`,
 }
@@ -112,7 +112,7 @@ func TestParsers(t *testing.T) {
 				return false
 			}
 		}
-		return true
+		return len(m.Variables) == 1
 	}
 
 	data := []struct {
@@ -135,7 +135,7 @@ func TestParsers(t *testing.T) {
 		md, err := v.parser.Parse([]byte(v.testData[1]))
 		check(t, err)
 		if !compare(v.parser.Metadata()) {
-			t.Fatalf("Expected %v, found %v for %v", expected, v.parser.Metadata().Variables, v.name)
+			t.Fatalf("Expected %v, found %v for %v", expected, v.parser.Metadata(), v.name)
 		}
 		if "Page content" != strings.TrimSpace(string(md)) {
 			t.Fatalf("Expected %v, found %v for %v", "Page content", string(md), v.name)