implement gophernicus extensions for gophermaps

1 files changed, 4 insertions, 0 deletions

diff --git a/gopher/gophermap/parse.go b/gopher/gophermap/parse.go
index 3317514..04286bd 100644
--- a/gopher/gophermap/parse.go
+++ b/gopher/gophermap/parse.go
@@ -6,6 +6,7 @@ import (
 	"errors"
 	"fmt"
 	"io"
+	"strconv"
 
 	sr "tildegit.org/tjp/sliderule"
 	"tildegit.org/tjp/sliderule/gopher"
@@ -38,6 +39,9 @@ func Parse(input io.Reader) (gopher.MapDocument, error) {
 			item.Selector = string(spl[1])
 			item.Hostname = string(spl[2])
 			item.Port = string(spl[3])
+			if _, err = strconv.Atoi(item.Port); err != nil {
+				return nil, InvalidLine(num)
+			}
 
 			doc = append(doc, item)
 		}