attributes support

3 files changed, 74 insertions, 6 deletions

diff --git a/service/http/attributes.go b/service/http/attributes.go
new file mode 100644
index 00000000..fe069adf
--- /dev/null
+++ b/service/http/attributes.go
@@ -0,0 +1,63 @@
+package http
+
+import (
+	"context"
+	"net/http"
+)
+
+const contextKey = "psr:attributes"
+
+type attrs map[string]interface{}
+
+// InitAttributes returns request with new context and attribute bag.
+func InitAttributes(r *http.Request) *http.Request {
+	return r.WithContext(context.WithValue(r.Context(), contextKey, attrs{}))
+}
+
+// AllAttributes returns all context attributes.
+func AllAttributes(r *http.Request) map[string]interface{} {
+	v := r.Context().Value(contextKey)
+	if v == nil {
+		return nil
+	}
+
+	return v.(attrs)
+}
+
+// Get gets the value from request context. It replaces any existing
+// values.
+func GetAttribute(r *http.Request, key string) interface{} {
+	v := r.Context().Value(contextKey)
+	if v == nil {
+		return ""
+	}
+
+	return v.(attrs).Get(key)
+}
+
+// Set sets the key to value. It replaces any existing
+// values. Context specific.
+func SetAttribute(r *http.Request, key string, value interface{}) {
+	v := r.Context().Value(contextKey)
+	v.(attrs).Set(key, value)
+}
+
+// Get gets the value associated with the given key.
+func (v attrs) Get(key string) interface{} {
+	if v == nil {
+		return ""
+	}
+
+	return v[key]
+}
+
+// Set sets the key to value. It replaces any existing
+// values.
+func (v attrs) Set(key string, value interface{}) {
+	v[key] = value
+}
+
+// Del deletes the value associated with key.
+func (v attrs) Del(key string) {
+	delete(v, key)
+}
\ No newline at end of file
diff --git a/service/http/request.go b/service/http/request.go
index 9281a3f5..21566416 100644
--- a/service/http/request.go
+++ b/service/http/request.go
@@ -44,6 +44,9 @@ type Request struct {
 	// Uploads contains list of uploaded files, their names, sized and associations with temporary files.
 	Uploads *Uploads `json:"uploads"`
 
+	// Attributes can be set by chained middleware to safely pass value from Golang to PHP. See: GetAttribute, SetAttribute functions.
+	Attributes map[string]interface{} `json:"attributes"`
+
 	// request body can be parsedData or []byte
 	body interface{}
 }
@@ -51,12 +54,13 @@ type Request struct {
 // NewRequest creates new PSR7 compatible request using net/http request.
 func NewRequest(r *http.Request, cfg *UploadsConfig) (req *Request, err error) {
 	req = &Request{
-		Protocol: r.Proto,
-		Method:   r.Method,
-		URI:      uri(r),
-		Headers:  r.Header,
-		Cookies:  make(map[string]string),
-		RawQuery: r.URL.RawQuery,
+		Protocol:   r.Proto,
+		Method:     r.Method,
+		URI:        uri(r),
+		Headers:    r.Header,
+		Cookies:    make(map[string]string),
+		RawQuery:   r.URL.RawQuery,
+		Attributes: AllAttributes(r),
 	}
 
 	for _, c := range r.Cookies() {
diff --git a/service/http/service.go b/service/http/service.go
index cef019b3..460175b9 100644
--- a/service/http/service.go
+++ b/service/http/service.go
@@ -113,6 +113,7 @@ func (s *Service) Stop() {
 
 // middleware handles connection using set of mdws and rr PSR-7 server.
 func (s *Service) ServeHTTP(w http.ResponseWriter, r *http.Request) {
+	r = InitAttributes(r)
 	for _, m := range s.mdws {
 		if m(w, r) {
 			return