feat: get image blob in backend (#495)

* feat: get image blob in backend

* chore: update

plugin/http_getter/html_meta_test.go

@@ -0,0 +1,34 @@
+package getter
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestGetHTMLMeta(t *testing.T) {
+	tests := []struct {
+		urlStr   string
+		htmlMeta HTMLMeta
+	}{
+		{
+			urlStr: "https://baidu.com",
+			htmlMeta: HTMLMeta{
+				Title: "百度一下，你就知道",
+			},
+		},
+		{
+			urlStr: "https://www.bytebase.com/blog/sql-review-tool-for-devs",
+			htmlMeta: HTMLMeta{
+				Title:       "The SQL Review Tool for Developers",
+				Description: "Reviewing SQL can be somewhat tedious, yet is essential to keep your database fleet reliable. At Bytebase, we are building a developer-first SQL review tool to empower the DevOps system.",
+				Image:       "https://www.bytebase.com/static/blog/sql-review-tool-for-devs/dev-fighting-dba.webp",
+			},
+		},
+	}
+	for _, test := range tests {
+		metadata, err := GetHTMLMeta(test.urlStr)
+		require.NoError(t, err)
+		require.Equal(t, test.htmlMeta, *metadata)
+	}
+}