Ignore cookies with empty values

Change-Id: I7902bb4eff8863117f8fe895e1a4ae8af29a88be

cookie/cookie.go

diff --git a/cookie/cookie.go b/cookie/cookie.go
index ca2df64..bd7e490 100644
--- a/cookie/cookie.go
+++ b/cookie/cookie.go
@@ -53,8 +53,8 @@
 			continue
 		}
 		fields := strings.Split(line, "\t")
-		if len(fields) != 7 {
-			return nil, fmt.Errorf("got %d fields in line %q, want 8", len(fields), line)
+		if len(fields) != 6 && len(fields) != 7 {
+			return nil, fmt.Errorf("got %d fields in line %q, want 6 or 7", len(fields), line)
 		}
 
 		exp, err := strconv.ParseInt(fields[4], 10, 64)
@@ -65,12 +65,14 @@
 		c := http.Cookie{
 			Domain:   fields[0],
 			Name:     fields[5],
-			Value:    fields[6],
 			Path:     fields[2],
 			Expires:  time.Unix(exp, 0),
 			Secure:   fields[3] == "TRUE",
 			HttpOnly: httpOnly,
 		}
+		if len(fields) == 7 {
+			c.Value = fields[6]
+		}
 
 		result = append(result, &c)
 	}

cookie/cookie_test.go

diff --git a/cookie/cookie_test.go b/cookie/cookie_test.go
index b63260e..2aa4d53 100644
--- a/cookie/cookie_test.go
+++ b/cookie/cookie_test.go
@@ -26,6 +26,7 @@
 	in := `# Netscape HTTP Cookie File
 # http://www.netscape.com/newsref/std/cookie_spec.html
 # This is a generated file!  Do not edit.
+#HttpOnly_login.netscape.com	FALSE	/	FALSE	1467968199	XYZ     
 #HttpOnly_login.netscape.com	FALSE	/	FALSE	1467968199	XYZ	abc|pqr`
 
 	buf := bytes.NewBufferString(in)
@@ -41,6 +42,14 @@
 			Secure:   false,
 			Expires:  time.Unix(1467968199, 0),
 			Name:     "XYZ",
+			HttpOnly: true,
+		},
+		{
+			Domain:   "login.netscape.com",
+			Path:     "/",
+			Secure:   false,
+			Expires:  time.Unix(1467968199, 0),
+			Name:     "XYZ",
 			Value:    "abc|pqr",
 			HttpOnly: true,
 		},