Add support for modifying daemon configuration on-the-fly

router/router.go

@@ -30,6 +30,7 @@ func Configure() *gin.Engine {
 	// All of the routes beyond this mount will use an authorization middleware
 	// and will not be accessible without the correct Authorization header provided.
 	protected := router.Use(AuthorizationMiddleware)
+	protected.POST("/api/update", postUpdateConfiguration)
 	protected.GET("/api/system", getSystemInformation)
 	protected.GET("/api/servers", getAllServers)
 	protected.POST("/api/servers", postCreateServer)

router/router_system.go

@@ -3,6 +3,7 @@ package router
 import (
 	"bytes"
 	"github.com/gin-gonic/gin"
+	"github.com/pterodactyl/wings/config"
 	"github.com/pterodactyl/wings/installer"
 	"github.com/pterodactyl/wings/server"
 	"github.com/pterodactyl/wings/system"
@@ -63,3 +64,25 @@ func postCreateServer(c *gin.Context) {
 
 	c.Status(http.StatusAccepted)
 }
+
+// Updates the running configuration for this daemon instance.
+func postUpdateConfiguration(c *gin.Context) {
+	// A backup of the configuration for error purposes.
+	ccopy := *config.Get()
+	// A copy of the configuration we're using to bind the data recevied into.
+	cfg := *config.Get()
+
+	c.BindJSON(&cfg)
+
+	config.Set(&cfg)
+	if err := config.Get().WriteToDisk(); err != nil {
+		// If there was an error writing to the disk, revert back to the configuration we had
+		// before this code was run.
+		config.Set(&ccopy)
+
+		TrackedError(err).AbortWithServerError(c)
+		return
+	}
+
+	c.Status(http.StatusNoContent)
+}