Sessions are now in full sync with the registered database, on acquire(init), set, get, delete, clear, visit, len, release(destroy) as requested by almost everyone. https://github.com/kataras/iris/issues/969

Former-commit-id: 49fcdb93106a78f0a24ad3fb4d8725e35e98451a

sessions/transcoding.go

@@ -0,0 +1,49 @@
+package sessions
+
+import "encoding/json"
+
+type (
+	// Marshaler is the common marshaler interface, used by transcoder.
+	Marshaler interface {
+		Marshal(interface{}) ([]byte, error)
+	}
+	// Unmarshaler is the common unmarshaler interface, used by transcoder.
+	Unmarshaler interface {
+		Unmarshal([]byte, interface{}) error
+	}
+	// Transcoder is the interface that transcoders should implement, it includes just the `Marshaler` and the `Unmarshaler`.
+	Transcoder interface {
+		Marshaler
+		Unmarshaler
+	}
+)
+
+// DefaultTranscoder is the default transcoder across databases, it's the JSON by default.
+// Change it if you want a different serialization/deserialization inside your session databases (when `UseDatabase` is used).
+var DefaultTranscoder = defaultTranscoder{}
+
+type defaultTranscoder struct{}
+
+func (d defaultTranscoder) Marshal(value interface{}) ([]byte, error) {
+	if tr, ok := value.(Marshaler); ok {
+		return tr.Marshal(value)
+	}
+
+	if jsonM, ok := value.(json.Marshaler); ok {
+		return jsonM.MarshalJSON()
+	}
+
+	return json.Marshal(value)
+}
+
+func (d defaultTranscoder) Unmarshal(b []byte, outPtr interface{}) error {
+	if tr, ok := outPtr.(Unmarshaler); ok {
+		return tr.Unmarshal(b, outPtr)
+	}
+
+	if jsonUM, ok := outPtr.(json.Unmarshaler); ok {
+		return jsonUM.UnmarshalJSON(b)
+	}
+
+	return json.Unmarshal(b, outPtr)
+}