Add More Examples & Categorized in Folders & TOC

Former-commit-id: ce4d711a75a4ba08ffab075e6baa88724725885b

_examples/examples/intermediate/view/custom-renderer/main.go

@@ -0,0 +1,48 @@
+package main
+
+import (
+	"io"
+
+	"gopkg.in/kataras/iris.v6"
+	"gopkg.in/kataras/iris.v6/adaptors/httprouter"
+)
+
+func main() {
+	app := iris.New()
+	// output startup banner and error logs on os.Stdout
+	app.Adapt(iris.DevLogger())
+	// set the router, you can choose gorillamux too
+	app.Adapt(httprouter.New())
+
+	// Custom Render Policy to override or create new content-type render
+	// i,e: "text/html" with a prefix,
+	// we will just write to the writer and return false
+	// to continue to the next contentType-matched renderer if any.
+	app.Adapt(iris.RenderPolicy(func(out io.Writer, contentType string, binding interface{}, options ...map[string]interface{}) (bool, error) {
+
+		if contentType == "text/html" {
+			if content, ok := binding.(string); ok {
+				out.Write([]byte("<pre>My Custom prefix</pre><br/>" + content))
+			}
+
+		}
+		// continue to the next, no error
+		// note: if we wanted to stop here we would return true instead of false.
+		return false, nil
+	}))
+
+	app.Get("", func(ctx *iris.Context) {
+
+		// These content-types are not managed by our RenderPolicy:
+		// text, binary and html content-types are
+		// not rendered via serializers, you have to
+		// use the ctx.Render functions instead.
+		// so something like this:
+		// ctx.Text(iris.StatusOK, "my text content body here!")
+		// will NOT work with out custom render policy.
+		ctx.Render("text/html",
+			"my text content body here!")
+	})
+
+	app.Listen(":8080")
+}