Update to version 8.5.0 | NEW: MVC Output Result | Read HISTORY.md

Former-commit-id: 6a3579f2500fc715d7dc606478960946dcade61d

mvc/method_result.go

@@ -0,0 +1,58 @@
+package mvc
+
+import (
+	"github.com/kataras/iris/context"
+	"github.com/kataras/iris/mvc/activator/methodfunc"
+)
+
+// build go1.9 only(go19.go)-->
+// // Result is a response dispatcher.
+// // All types that complete this interface
+// // can be returned as values from the method functions.
+// Result = methodfunc.Result
+// <--
+// No, let's just copy-paste in order to go 1.8 users have this type
+// easy to be used from the root mvc package,
+// sometimes duplication doesn't hurt.
+
+// Result is a response dispatcher.
+// All types that complete this interface
+// can be returned as values from the method functions.
+//
+// Example at: https://github.com/kataras/iris/tree/master/_examples/mvc/using-method-result.
+type Result interface { // NOTE: Should be always compatible with the methodfunc.Result.
+	// Dispatch should sends the response to the context's response writer.
+	Dispatch(ctx context.Context)
+}
+
+var defaultFailureResponse = Response{Code: methodfunc.DefaultErrStatusCode}
+
+// Try will check if "fn" ran without any panics,
+// using recovery,
+// and return its result as the final response
+// otherwise it returns the "failure" response if any,
+// if not then a 400 bad request is being sent.
+//
+// Example usage at: https://github.com/kataras/iris/blob/master/mvc/method_result_test.go.
+func Try(fn func() Result, failure ...Result) Result {
+	var failed bool
+	var actionResponse Result
+
+	func() {
+		defer func() {
+			if rec := recover(); rec != nil {
+				failed = true
+			}
+		}()
+		actionResponse = fn()
+	}()
+
+	if failed {
+		if len(failure) > 0 {
+			return failure[0]
+		}
+		return defaultFailureResponse
+	}
+
+	return actionResponse
+}