Add disabling frontend (#137)

* Add disabling frontend

* fixes requested in review

* Document EnableWebFrontEnd in configuration.md

config.go

@@ -75,6 +75,7 @@ type Config struct {
 	Domain                     string
 	EnableBackgroundEffect     bool
 	EnableFooter               bool
+	EnableWebFrontEnd          bool
 	FallbackAPIServers         []FallbackAPIServer
 	ForwardSkins               bool
 	InstanceName               string
@@ -123,6 +124,7 @@ func DefaultConfig() Config {
 		Domain:                   "",
 		EnableBackgroundEffect:   true,
 		EnableFooter:             true,
+		EnableWebFrontEnd:        true,
 		ForwardSkins:             true,
 		InstanceName:             "Drasl",
 		ListenAddress:            "0.0.0.0:25585",

doc/configuration.md

@@ -23,6 +23,7 @@ Other available options:
 - `PreMigrationBackups`: Back up the database to `/path/to/StateDirectory/drasl.X.YYYY-mm-ddTHH-MM-SSZ.db` (where `X` is the old database version) before migrating to a new database version. Boolean. Default value: `true`.
 - `EnableBackgroundEffect`: Whether to enable the 3D background animation in the web UI. Boolean. Default value: `true`.
 - `EnableFooter`: Whether to enable the page footer in the web UI. Boolean. Default value: `true`.
+- `EnableWebFrontEnd`: Whether to enable the web UI. Boolean. Default value: `true`.
 - `[RateLimit]`: Rate-limit requests per IP address to limit abuse. Only applies to certain web UI routes, not any Yggdrasil routes. Requests for skins, capes, and web pages are also unaffected. Uses [Echo](https://echo.labstack.com)'s [rate limiter middleware](https://echo.labstack.com/middleware/rate-limiter/).
   - `Enable`: Boolean. Default value: `true`.
   - `RequestsPerSecond`: Number of requests per second allowed per IP address. Integer. Default value: `5`.

main.go

@@ -144,6 +144,7 @@ func (app *App) MakeServer() *echo.Echo {
 	}
 
 	// Front
+	if app.Config.EnableWebFrontEnd {
 		t := NewTemplate(app)
 		e.Renderer = t
 		e.GET("/", FrontRoot(app))
@@ -168,6 +169,7 @@ func (app *App) MakeServer() *echo.Echo {
 		e.POST("/web/update-player", FrontUpdatePlayer(app))
 		e.POST("/web/update-user", FrontUpdateUser(app))
 		e.Static("/web/public", path.Join(app.Config.DataDirectory, "public"))
+	}
 	e.Static("/web/texture/cape", path.Join(app.Config.StateDirectory, "cape"))
 	e.Static("/web/texture/default-cape", path.Join(app.Config.StateDirectory, "default-cape"))
 	e.Static("/web/texture/default-skin", path.Join(app.Config.StateDirectory, "default-skin"))
@@ -435,7 +437,11 @@ func setup(config *Config) *App {
 						log.Fatal(result.Error)
 					}
 				}
+				if app.Config.EnableWebFrontEnd {
 					log.Println("No users found! Here's an invite URL:", Unwrap(app.InviteURL(&invite)))
+				} else {
+					log.Println("No users found! Here's an invite code:", invite.Code)
+				}
 			}
 		}
 	}