Add .Xml()

docs/context.md

@@ -1032,4 +1032,27 @@ app.Get("/", func(c *fiber.Ctx) {
 })
 ```
 
+#### Xml
+Xml sets the header to "application/xml" and marshals your interface to xml.
+```go
+// Function signature
+c.Xml(xml interface{}) error
+
+// Example
+type person struct {
+	Name  string `xml:"name"`
+	Stars int    `xml:"stars"`
+}
+
+app := fiber.New()
+app.Get("/", func(c *fiber.Ctx) {
+	c.Xml(person{"John", 50})
+	// => Content-Type: application/xml
+	// => <person><name>John</name><stars>50</stars></person>
+
+})
+app.Listen(8080)
+
+```
+
 *Caught a mistake? [Edit this page on GitHub!](https://github.com/Fenny/fiber/blob/master/docs/context.md)*

response.go

@@ -7,6 +7,7 @@
 package fiber
 
 import (
+	"encoding/xml"
 	"fmt"
 	"mime"
 	"path/filepath"
@@ -322,3 +323,14 @@ func (ctx *Ctx) Write(args ...interface{}) {
 		panic("body must be a string or []byte")
 	}
 }
+
+// Xml : https://gofiber.github.io/fiber/#/context?id=xml
+func (ctx *Ctx) Xml(v interface{}) error {
+	raw, err := xml.Marshal(v)
+	if err != nil {
+		return err
+	}
+	ctx.Set("Content-Type", "application/xml")
+	ctx.Fasthttp.Response.SetBody(raw)
+	return nil
+}