Fix the issue when a wildcard host is not taken into the account when matching vars

mux_test.go

@@ -146,6 +146,16 @@ func TestHost(t *testing.T) {
 			hostTemplate: `aaa.{v1:[a-z]{3}}.ccc`,
 			shouldMatch:  true,
 		},
+		{
+			title:        "Host route with pattern, match with wildcard port",
+			route:        new(Route).Host("aaa.{v1:[a-z]{3}}.ccc"),
+			request:      newRequest("GET", "http://aaa.bbb.ccc:8080/111/222/333"),
+			vars:         map[string]string{"v1": "bbb"},
+			host:         "aaa.bbb.ccc",
+			path:         "",
+			hostTemplate: `aaa.{v1:[a-z]{3}}.ccc`,
+			shouldMatch:  true,
+		},
 		{
 			title:        "Host route with pattern, additional capturing group, match",
 			route:        new(Route).Host("aaa.{v1:[a-z]{2}(?:b|c)}.ccc"),

regexp.go

@@ -173,13 +173,7 @@ type routeRegexp struct {
 // Match matches the regexp against the URL host or path.
 func (r *routeRegexp) Match(req *http.Request, match *RouteMatch) bool {
 	if r.regexpType == regexpTypeHost {
-		host := getHost(req)
-		if r.wildcardHostPort {
-			// Don't be strict on the port match
-			if i := strings.Index(host, ":"); i != -1 {
-				host = host[:i]
-			}
-		}
+		host := getHost(req, r.wildcardHostPort)
 		return r.regexp.MatchString(host)
 	}
 
@@ -287,7 +281,7 @@ type routeRegexpGroup struct {
 func (v routeRegexpGroup) setMatch(req *http.Request, m *RouteMatch, r *Route) {
 	// Store host variables.
 	if v.host != nil {
-		host := getHost(req)
+		host := getHost(req, v.host.wildcardHostPort)
 		matches := v.host.regexp.FindStringSubmatchIndex(host)
 		if len(matches) > 0 {
 			extractVars(host, matches, v.host.varsN, m.Vars)
@@ -331,11 +325,19 @@ func (v routeRegexpGroup) setMatch(req *http.Request, m *RouteMatch, r *Route) {
 // getHost tries its best to return the request host.
 // According to section 14.23 of RFC 2616 the Host header
 // can include the port number if the default value of 80 is not used.
-func getHost(r *http.Request) string {
+func getHost(r *http.Request, wildcardHostPort bool) string {
+	var host string
 	if r.URL.IsAbs() {
-		return r.URL.Host
+		host = r.URL.Host
+	} else {
+		host = r.Host
+	}
+	if wildcardHostPort {
+		if i := strings.Index(host, ":"); i != -1 {
+			host = host[:i]
+		}
 	}
-	return r.Host
+	return host
 }
 
 func extractVars(input string, matches []int, names []string, output map[string]string) {