minor: compatibility: context render

HISTORY.md

@@ -28,6 +28,8 @@ The codebase for Dependency Injection, Internationalization and localization and
 
 ## Fixes and Improvements
 
+- Add `Context.Render` method for compatibility.
+
 - Support of embedded [locale files](https://github.com/kataras/iris/blob/master/_examples/i18n/template-embedded/main.go) using standard `embed.FS` with the new `LoadFS` function.
 - Support of direct embedded view engines (`HTML, Blocks, Django, Handlebars, Pug, Amber, Jet` and `Ace`) with `embed.FS` or `fs.FS` (in addition to `string` and `http.FileSystem` types).
 - Add support for `embed.FS` and `fs.FS` on `app.HandleDir`.

_proposals/generic_handler.md

@@ -62,7 +62,7 @@ type (
 
 func main() {
 	app := iris.New()
-	app.Post("/", your_package.Handle(handler))
+	app.Post("/", x.Handle(handler))
 	app.Listen(":8080")
 }
 

context/context.go

@@ -4204,6 +4204,26 @@ func (ctx *Context) handleContextError(err error) {
 	// keep the error non nil so the caller has control over further actions.
 }
 
+// Render writes the response headers and calls the given renderer "r" to render data.
+// This method can be used while migrating from other frameworks.
+func (ctx *Context) Render(statusCode int, r interface {
+	// Render should push data with custom content type to the client.
+	Render(http.ResponseWriter) error
+	// WriteContentType writes custom content type to the response.
+	WriteContentType(w http.ResponseWriter)
+}) {
+	ctx.StatusCode(statusCode)
+
+	if statusCode >= 100 && statusCode <= 199 || statusCode == http.StatusNoContent || statusCode == http.StatusNotModified {
+		r.WriteContentType(ctx.writer)
+		return
+	}
+
+	if err := r.Render(ctx.writer); err != nil {
+		ctx.StopWithError(http.StatusInternalServerError, err)
+	}
+}
+
 // JSON marshals the given "v" value to JSON and writes the response to the client.
 // Look the Configuration.EnableProtoJSON and EnableEasyJSON too.
 //