[feature] Gin enable gzip encoding (#405)

* add gin gzip dependency

* add gzip middleware to router

* go mod tidy

README.md

@@ -176,6 +176,7 @@ The following libraries and frameworks are used by GoToSocial, with gratitude 
 - [coreos/go-oidc](https://github.com/coreos/go-oidc); OIDC client library. [Apache-2.0 License](https://spdx.org/licenses/Apache-2.0.html).
 - [gin-gonic/gin](https://github.com/gin-gonic/gin); speedy router engine. [MIT License](https://spdx.org/licenses/MIT.html).
   - [gin-contrib/cors](https://github.com/gin-contrib/cors); Gin CORS middleware. [MIT License](https://spdx.org/licenses/MIT.html).
+  - [gin-contrib/gzip](https://github.com/gin-contrib/gzip); Gin gzip middleware. [MIT License](https://spdx.org/licenses/MIT.html).
   - [gin-contrib/sessions](https://github.com/gin-contrib/sessions); Gin sessions middleware. [MIT License](https://spdx.org/licenses/MIT.html)
   - [gin-contrib/static](https://github.com/gin-contrib/static); Gin static page middleware. [MIT License](https://spdx.org/licenses/MIT.html)
 - [go-fed/httpsig](https://github.com/go-fed/httpsig); secure HTTP signature library. [BSD-3-Clause License](https://spdx.org/licenses/BSD-3-Clause.html).

go.mod

@@ -10,6 +10,7 @@ require (
 	github.com/buckket/go-blurhash v1.1.0
 	github.com/coreos/go-oidc/v3 v3.1.0
 	github.com/gin-contrib/cors v1.3.1
+	github.com/gin-contrib/gzip v0.0.5
 	github.com/gin-contrib/sessions v0.0.4
 	github.com/gin-gonic/gin v1.7.7
 	github.com/go-fed/httpsig v1.1.0

go.sum

@@ -196,6 +196,8 @@ github.com/gavv/httpexpect v2.0.0+incompatible/go.mod h1:x+9tiU1YnrOvnB725RkpoLv
 github.com/ghodss/yaml v1.0.0/go.mod h1:4dBDuWmgqj2HViK6kFavaiC9ZROes6MMH2rRYeMEF04=
 github.com/gin-contrib/cors v1.3.1 h1:doAsuITavI4IOcd0Y19U4B+O0dNWihRyX//nn4sEmgA=
 github.com/gin-contrib/cors v1.3.1/go.mod h1:jjEJ4268OPZUcU7k9Pm653S7lXUGcqMADzFA61xsmDk=
+github.com/gin-contrib/gzip v0.0.5 h1:mhnVU32YnnBh2LPH2iqRqsA/eR7SAqRaD388jL2s/j0=
+github.com/gin-contrib/gzip v0.0.5/go.mod h1:OPIK6HR0Um2vNmBUTlayD7qle4yVVRZT0PyhdUigrKk=
 github.com/gin-contrib/sessions v0.0.4 h1:gq4fNa1Zmp564iHP5G6EBuktilEos8VKhe2sza1KMgo=
 github.com/gin-contrib/sessions v0.0.4/go.mod h1:pQ3sIyviBBGcxgyR8mkeJuXbeV3h3NYmhJADQTq5+Vo=
 github.com/gin-contrib/sse v0.1.0 h1:Y/yl/+YNO8GZSjAhjMsSuLt29uWRFHdHYUb5lYOV9qE=

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
+}

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)