Add option for Gzip again, I removed it after v3 but seems users wants it back

HISTORY.md

@@ -25,8 +25,8 @@ A **Response Engine** gives you the freedom to create/change the render/response
 **Small changes**
 
 - `iris.Config.Charset`, before alpha.3 was `iris.Config.Rest.Charset` & `iris.Config.Render.Template.Charset`, but you can override it at runtime by passinth a map `iris.RenderOptions` on the `context.Render` call .
-- `iris.Config.IsDevelopment` , before alpha.1 was `iris.Config.Render.Template.IsDevelopment` 
-
+- `iris.Config.IsDevelopment`, before alpha.1 was `iris.Config.Render.Template.IsDevelopment` 
+- `iris.Config.Gzip`, enables gzip compression on your Render actions, this includes any type of render, templates and pure/raw content. If you don't want to enable it globaly, you could just use the third parameter on context.Render("myfileOrResponse", structBinding{}, iris.RenderOptions{"gzip": true}). It defaults to false
 
 **Websockets changes**
 

config/iris.go

@@ -94,6 +94,11 @@ type (
 		// defaults to "UTF-8"
 		Charset string
 
+		// Gzip enables gzip compression on your Render actions, this includes any type of render, templates and pure/raw content
+		// If you don't want to enable it globaly, you could just use the third parameter on context.Render("myfileOrResponse", structBinding{}, iris.RenderOptions{"gzip": true})
+		// defaults to false
+		Gzip bool
+
 		// Sessions contains the configs for sessions
 		Sessions Sessions
 
@@ -114,6 +119,7 @@ func Default() Iris {
 		DisableTemplateEngines: false,
 		IsDevelopment:          false,
 		Charset:                DefaultCharset,
+		Gzip:                   false,
 		ProfilePath:            "",
 		Sessions:               DefaultSessions(),
 		Websocket:              DefaultWebsocket(),

response.go

@@ -135,10 +135,10 @@ func (r *responseEngineMap) render(ctx *Context, obj interface{}, options ...map
 		finalResult = append(finalResult, result...)
 	}
 
-	gzipEnabled := false
+	gzipEnabled := ctx.framework.Config.Gzip
 	charset := ctx.framework.Config.Charset
 	if len(options) > 0 {
-		gzipEnabled = getGzipOption(options[0]) // located to the template.go below the RenderOptions
+		gzipEnabled = getGzipOption(ctx, options[0]) // located to the template.go below the RenderOptions
 		if chs := getCharsetOption(options[0]); chs != "" {
 			charset = chs
 		}

template.go

@@ -71,12 +71,12 @@ func (t TemplateFuncs) IsFree(key string) bool {
 	return true
 }
 
-func getGzipOption(options map[string]interface{}) bool {
+func getGzipOption(ctx *Context, options map[string]interface{}) bool {
 	gzipOpt := options["gzip"] // we only need that, so don't create new map to keep the options.
 	if b, isBool := gzipOpt.(bool); isBool {
 		return b
 	}
-	return false
+	return ctx.framework.Config.Gzip
 }
 
 func getCharsetOption(options map[string]interface{}) string {
@@ -166,10 +166,11 @@ func (t *templateEngineWrapper) execute(ctx *Context, filename string, binding i
 	}
 
 	// we do all these because we don't want to initialize a new map for each execution...
-	gzipEnabled := false
+	gzipEnabled := ctx.framework.Config.Gzip
 	charset := ctx.framework.Config.Charset
 	if len(options) > 0 {
-		gzipEnabled = getGzipOption(options[0])
+		gzipEnabled = getGzipOption(ctx, options[0])
+
 		if chs := getCharsetOption(options[0]); chs != "" {
 			charset = chs
 		}