minor (see previous commit)

_examples/logging/request-logger/accesslog/main.go

@@ -41,6 +41,16 @@ func main() {
 		ac.SetFormatter(&accesslog.Template{
 		    Text: "{{.Now.Format .TimeFormat}}|{{.Latency}}|{{.Method}}|{{.Path}}|{{.RequestValuesLine}}|{{.Code}}|{{.Request}}|{{.Response}}|\n",
 		})
+
+		Set custom request fields:
+		ac.AddField(func(ctx iris.Context) (string, interface{}) {
+		    v := ctx.RemoteAddr()
+		    if v == "" {
+		        return "", nil
+		    }
+		    // the log entry name and its value.
+		    return "IP", v
+		})
 	*/
 
 	defer ac.Close()

context/context.go

@@ -1129,6 +1129,8 @@ type (
 	// The structure contains struct tags for JSON, form, XML, YAML and TOML.
 	// Look the `GetReferrer() Referrer` and `goreferrer` external package.
 	Referrer struct {
+		// The raw refer(r)er URL.
+		Raw        string                   `json:"raw" form:"raw" xml:"Raw" yaml:"Raw" toml:"Raw"`
 		Type       ReferrerType             `json:"type" form:"referrer_type" xml:"Type" yaml:"Type" toml:"Type"`
 		Label      string                   `json:"label" form:"referrer_form" xml:"Label" yaml:"Label" toml:"Label"`
 		URL        string                   `json:"url" form:"referrer_url" xml:"URL" yaml:"URL" toml:"URL"`
@@ -1147,6 +1149,11 @@ type (
 	ReferrerGoogleSearchType = goreferrer.GoogleSearchType
 )
 
+// String returns the raw ref url.
+func (ref Referrer) String() string {
+	return ref.Raw
+}
+
 // Contains the available values of the goreferrer enums.
 const (
 	ReferrerInvalid ReferrerType = iota
@@ -1187,6 +1194,7 @@ func (ctx *Context) GetReferrer() Referrer {
 
 	if ref := goreferrer.DefaultRules.Parse(refURL); ref.Type > goreferrer.Invalid {
 		return Referrer{
+			Raw:        refURL,
 			Type:       ReferrerType(ref.Type),
 			Label:      ref.Label,
 			URL:        ref.URL,

middleware/accesslog/accesslog.go

@@ -257,7 +257,7 @@ func (ac *AccessLog) after(ctx *context.Context, lat time.Duration, method, path
 	var fields []memstore.Entry
 
 	if n := len(ac.Fields); n > 0 {
-		fields = make([]memstore.Entry, n)
+		fields = make([]memstore.Entry, 0, n)
 
 		for _, extract := range ac.Fields {
 			key, value := extract(ctx)