Add website name and icon url for output

Author: chenyunchen

README.md

@@ -8,18 +8,22 @@
 			fmt.Println(err)
 			return
 		}
+		fmt.Printf("Icon : %s\n", s.Preview.Icon)
+		fmt.Printf("Name : %s\n", s.Preview.Name)
 		fmt.Printf("Title : %s\n", s.Preview.Title)
 		fmt.Printf("Description : %s\n", s.Preview.Description)
 		fmt.Printf("Image: %s\n", s.Preview.Images[0])
 		fmt.Printf("Url : %s\n", s.Preview.Link)
 	}
 
-output: 
+output:
 
+**Icon :** https://www.w3.org/favicon.ico  
+**Name :** www.w3.org  
 **Title :** World Wide Web Consortium (W3C)  
 **Description :** The World Wide Web Consortium (W3C) is an international community where Member organizations, a full-time staff, and the public work together to develop Web standards.  
 **Image:** https://www.w3.org/2008/site/images/logo-w3c-mobile-lg  
-**Url :** https://www.w3.org/  
+**Url :** https://www.w3.org/
 
 
 ## License

goscraper.go

@@ -30,6 +30,8 @@ type Document struct {
 }
 
 type DocumentPreview struct {
+	Icon        string
+	Name        string
 	Title       string
 	Description string
 	Images      []string
@@ -165,6 +167,10 @@ func (scraper *Scraper) parseDocument(doc *Document) error {
 	doc.Preview.Images = []string{}
 	// saves previews' link in case that <link rel="canonical"> is found after <meta property="og:url">
 	link := doc.Preview.Link
+	// set default value to site name if <meta property="og:site_name"> not found
+	doc.Preview.Name = scraper.Url.Host
+	// set default icon to web root if <link rel="icon" href="/favicon.ico"> not found
+	doc.Preview.Icon = fmt.Sprintf("%s://%s%s", scraper.Url.Scheme, scraper.Url.Host, "/favicon.ico")
 	for {
 		tokenType := t.Next()
 		if tokenType == html.ErrorToken {
@@ -185,11 +191,15 @@ func (scraper *Scraper) parseDocument(doc *Document) error {
 
 		case "link":
 			var canonical bool
+			var hasIcon bool
 			var href string
 			for _, attr := range token.Attr {
 				if cleanStr(attr.Key) == "rel" && cleanStr(attr.Val) == "canonical" {
 					canonical = true
 				}
+				if cleanStr(attr.Key) == "rel" && cleanStr(attr.Val) == "icon" {
+					hasIcon = true
+				}
 				if cleanStr(attr.Key) == "href" {
 					href = attr.Val
 				}
@@ -201,6 +211,9 @@ func (scraper *Scraper) parseDocument(doc *Document) error {
 						return err
 					}
 				}
+				if len(href) > 0 && hasIcon {
+					doc.Preview.Icon = href
+				}
 			}
 
 		case "meta":
@@ -221,6 +234,8 @@ func (scraper *Scraper) parseDocument(doc *Document) error {
 				}
 			}
 			switch cleanStr(property) {
+			case "og:site_name":
+				doc.Preview.Name = content
 			case "og:title":
 				doc.Preview.Title = content
 			case "og:description":