[feature] Gin enable gzip encoding (#405)

* add gin gzip dependency

* add gzip middleware to router

* go mod tidy

2 files changed, 40 insertions, 5 deletions

diff --git a/internal/router/gzip.go b/internal/router/gzip.go
new file mode 100644
index 000000000..4c5c99eee
--- /dev/null
+++ b/internal/router/gzip.go
@@ -0,0 +1,30 @@
+/*
+   GoToSocial
+   Copyright (C) 2021-2022 GoToSocial Authors admin@gotosocial.org
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Affero General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Affero General Public License for more details.
+
+   You should have received a copy of the GNU Affero General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package router
+
+import (
+	ginGzip "github.com/gin-contrib/gzip"
+	"github.com/gin-gonic/gin"
+)
+
+func useGzip(engine *gin.Engine) error {
+	gzipMiddleware := ginGzip.Gzip(ginGzip.DefaultCompression)
+	engine.Use(gzipMiddleware)
+	return nil
+}
diff --git a/internal/router/router.go b/internal/router/router.go
index f1247d274..4b00f0eb0 100644
--- a/internal/router/router.go
+++ b/internal/router/router.go
@@ -137,11 +137,8 @@ func New(ctx context.Context, db db.DB) (Router, error) {
 		return nil, err
 	}
 
-	// set template functions
-	LoadTemplateFunctions(engine)
-
-	// load templates onto the engine
-	if err := loadTemplates(engine); err != nil {
+	// enable gzip compression on the engine
+	if err := useGzip(engine); err != nil {
 		return nil, err
 	}
 
@@ -150,6 +147,14 @@ func New(ctx context.Context, db db.DB) (Router, error) {
 		return nil, err
 	}
 
+	// set template functions
+	LoadTemplateFunctions(engine)
+
+	// load templates onto the engine
+	if err := loadTemplates(engine); err != nil {
+		return nil, err
+	}
+
 	// create the http server here, passing the gin engine as handler
 	bindAddress := viper.GetString(keys.BindAddress)
 	port := viper.GetInt(keys.Port)