update: rename 'Server' into 'Handler'

builder.go

@@ -115,5 +115,5 @@ func (b Builder) Build() (http.Handler, error) {
 		}
 	}
 
-	return Server(b), nil
+	return Handler(b), nil
 }

handler.go

@@ -8,22 +8,22 @@ import (
 	"git.xdrm.io/go/aicra/internal/reqdata"
 )
 
-// Server hides the builder and allows handling http requests
-type Server Builder
+// Handler wraps the builder to handle requests
+type Handler Builder
 
-// ServeHTTP implements http.Handler and is called on each request
-func (server Server) ServeHTTP(res http.ResponseWriter, req *http.Request) {
-	defer req.Body.Close()
+// ServeHTTP implements http.Handler
+func (s Handler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
+	defer r.Body.Close()
 
-	// 1. find a matching service in the config
-	service := server.conf.Find(req)
+	// 1. find a matching service from config
+	var service = s.conf.Find(r)
 	if service == nil {
 		handleError(api.ErrUnknownService, w, r)
 		return
 	}
 
 	// 2. extract request data
-	dataset, err := extractRequestData(service, *req)
+	var input, err = extractInput(service, *r)
 	if err != nil {
 		handleError(api.ErrMissingParam, w, r)
 		return
@@ -31,42 +31,42 @@ func (server Server) ServeHTTP(res http.ResponseWriter, req *http.Request) {
 
 	// 3. find a matching handler
 	var handler *apiHandler
-	for _, h := range server.handlers {
+	for _, h := range s.handlers {
 		if h.Method == service.Method && h.Path == service.Pattern {
 			handler = h
 		}
 	}
 
-	// 4. fail if found no handler
+	// 4. fail on no matching handler
 	if handler == nil {
 		handleError(api.ErrUncallableService, w, r)
 		return
 	}
 
-	// 5. execute
-	returned, apiErr := handler.dyn.Handle(dataset.Data)
+	// 5. pass execution to the handler
+	var outData, outErr = handler.dyn.Handle(input.Data)
 
-	// 6. build response from returned data
-	response := api.EmptyResponse().WithError(apiErr)
-	for key, value := range returned {
+	// 6. build res from returned data
+	var res = api.EmptyResponse().WithError(outErr)
+	for key, value := range outData {
 
-		// find original name from rename
+		// find original name from 'rename' field
 		for name, param := range service.Output {
 			if param.Rename == key {
-				response.SetData(name, value)
+				res.SetData(name, value)
 			}
 		}
 	}
 
 	// 7. apply headers
-	res.Header().Set("Content-Type", "application/json; charset=utf-8")
-	for key, values := range response.Headers {
+	w.Header().Set("Content-Type", "application/json; charset=utf-8")
+	for key, values := range res.Headers {
 		for _, value := range values {
-			res.Header().Add(key, value)
+			w.Header().Add(key, value)
 		}
 	}
 
-	response.ServeHTTP(res, req)
+	res.ServeHTTP(w, r)
 }
 
 func handleError(err api.Err, w http.ResponseWriter, r *http.Request) {
@@ -74,7 +74,7 @@ func handleError(err api.Err, w http.ResponseWriter, r *http.Request) {
 	response.ServeHTTP(w, r)
 }
 
-func extractRequestData(service *config.Service, req http.Request) (*reqdata.T, error) {
+func extractInput(service *config.Service, req http.Request) (*reqdata.T, error) {
 	var dataset = reqdata.New(service)
 
 	// URI data