fixed webmention discovery

webmention.go

@@ -177,10 +177,15 @@ func (OwlHtmlParser) GetWebmentionEndpoint(resp *http.Response) (string, error)
 	findEndpoint = func(n *html.Node) (string, error) {
 		if n.Type == html.ElementNode && (n.Data == "link" || n.Data == "a") {
 			for _, attr := range n.Attr {
-				if attr.Key == "rel" && strings.Contains(attr.Val, "webmention") {
+				if attr.Key == "rel" {
-					for _, attr := range n.Attr {
+					vals := strings.Split(attr.Val, " ")
-						if attr.Key == "href" {
+					for _, val := range vals {
-							return attr.Val, nil
+						if val == "webmention" {
+							for _, attr := range n.Attr {
+								if attr.Key == "href" {
+									return attr.Val, nil
+								}
+							}
 						}
 					}
 				}

webmention_test.go

@@ -75,6 +75,19 @@ func TestGetWebmentionEndpointLinkA(t *testing.T) {
 	}
 }
 
+func TestGetWebmentionEndpointLinkAFakeWebmention(t *testing.T) {
+	html := []byte("<a rel=\"not-webmention\" href=\"http://example.com/foo\" /><a rel=\"webmention\" href=\"http://example.com/webmention\" />")
+	parser := &owl.OwlHtmlParser{}
+	endpoint, err := parser.GetWebmentionEndpoint(constructResponse(html))
+
+	if err != nil {
+		t.Errorf("Unable to parse feed: %v", err)
+	}
+	if endpoint != "http://example.com/webmention" {
+		t.Errorf("Wrong endpoint. Expected %v, got %v", "http://example.com/webmention", endpoint)
+	}
+}
+
 func TestGetWebmentionEndpointLinkHeader(t *testing.T) {
 	html := []byte("")
 	parser := &owl.OwlHtmlParser{}