Attribute extractor added. HTML extractor added. Outer HTML Extractor added.

exporter package renamed to export, extractor package renamed to extract for simplicity.

extract/attr.go

@@ -0,0 +1,24 @@
+package extract
+
+import (
+	"errors"
+	"github.com/PuerkitoBio/goquery"
+)
+
+var ErrAttrNotExists = errors.New("attribute not exist")
+
+// Attr returns HTML attribute value of provided selector
+type Attr struct {
+	Name     string
+	Selector string
+	Attr     string
+}
+
+// Extract returns HTML attribute value of provided selector
+func (e *Attr) Extract(doc *goquery.Document) (interface{}, error) {
+	attr, exists := doc.Find(e.Selector).Attr(e.Attr)
+	if !exists {
+		return nil, ErrAttrNotExists
+	}
+	return map[string]string{e.Name: attr}, nil
+}