Handling request validation/authentication

controllers/validation.go

@@ -0,0 +1,40 @@
+package controllers
+
+import (
+	"github.com/astaxie/beego"
+	"github.com/deluan/gosonic/controllers/responses"
+)
+
+type ControllerInterface interface {
+	GetString(key string, def ...string) string
+	CustomAbort(status int, body string)
+}
+
+func validate(controller ControllerInterface) {
+	if beego.AppConfig.String("disableValidation") != "true" {
+		checkParameters(controller)
+		authenticate(controller)
+	}
+}
+
+func checkParameters(c ControllerInterface) {
+	requiredParameters := []string {"u", "p", "v", "c",}
+
+	for _,p := range requiredParameters {
+		if c.GetString(p) == "" {
+			cancel(c, responses.ERROR_MISSING_PARAMETER)
+		}
+	}
+}
+
+func authenticate(c ControllerInterface) {
+	user := c.GetString("u")
+	pass := c.GetString("p")
+	if (user != beego.AppConfig.String("user") || pass != beego.AppConfig.String("password")) {
+		cancel(c, responses.ERROR_AUTHENTICATION_FAIL)
+	}
+}
+
+func cancel(c ControllerInterface, code int) {
+	c.CustomAbort(200, string(responses.NewError(code)))
+}