Initial commit.

internal/common/const.go

@@ -0,0 +1,8 @@
+package common
+
+var (
+	Branch     string
+	Build      string
+	CommitHash string
+	Version    string
+)

internal/common/context_keys.go

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+package common
+
+// ContextKey is a type of context.Context keys.
+type ContextKey string
+
+const (
+	// ContextKeyApplication specifies that returned value is a name of application.
+	ContextKeyApplication ContextKey = "applicationName"
+	// ContextKeyMetric specifies that returned value is a name of metric of application.
+	ContextKeyMetric ContextKey = "metricName"
+)

internal/common/http_handler.go

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+package common
+
+import "context"
+
+// HTTPHandlerFunc describes signature of HTTP requests handling function.
+type HTTPHandlerFunc func(context.Context) string