Linting and comments.

internal/models/request_info.go

@@ -2,8 +2,14 @@ package models
 
 // RequestInfo is a parsed request information to throw into application's handler.
 type RequestInfo struct {
+	// Application is a name of application. We should ask it's handler for metrics.
 	Application string
-	Metric      string
+	// Metric is a metric name with parameters (e.g. requests{path='/',code=200} will
+	// be "requests/path:\//code:200").
+	Metric string
+	// Request type is a type of request. Currently known: "apps_list", "info", and "metrics".
+	// All other request types will produce HTTP 400 error.
 	RequestType string
-	APIVersion  int
+	// APIVersion is a version of API requested.
+	APIVersion int
 }