feat(be/fe): enable captcha (#69)

* feat(ui): enable captcha

* feat(server): enable captcha

* fix(ui): fix login pane layout

* fix(config): remove unused config and files

* fix(be/fe): clean up code

* chore(fe/be): clean up code

src/server/config.go

@@ -17,6 +17,9 @@ type UsersCfg struct {
 	CookieHttpOnly  bool   `json:"cookieHttpOnly" yaml:"cookieHttpOnly"`
 	MinUserNameLen  int    `json:"minUserNameLen" yaml:"minUserNameLen"`
 	MinPwdLen       int    `json:"minPwdLen" yaml:"minPwdLen"`
+	CaptchaWidth    int    `json:"captchaWidth" yaml:"captchaWidth"`
+	CaptchaHeight   int    `json:"captchaHeight" yaml:"captchaHeight"`
+	CaptchaEnabled  bool   `json:"captchaEnabled" yaml:"captchaEnabled"`
 }
 
 type Secrets struct {
@@ -60,6 +63,9 @@ func DefaultConfig() (string, error) {
 			CookieHttpOnly:  true,
 			MinUserNameLen:  4,
 			MinPwdLen:       6,
+			CaptchaWidth:    256,
+			CaptchaHeight:   60,
+			CaptchaEnabled:  true,
 		},
 		Secrets: &Secrets{
 			TokenSecret: "",

src/server/server.go

@@ -189,6 +189,10 @@ func initHandlers(router *gin.Engine, cfg gocfg.ICfg, deps *depidx.Deps) (*gin.E
 	rolesAPI.DELETE("/", userHdrs.DelRole)
 	rolesAPI.GET("/list", userHdrs.ListRoles)
 
+	captchaAPI := v1.Group("/captchas")
+	captchaAPI.GET("/", userHdrs.GetCaptchaID)
+	captchaAPI.GET("/imgs", userHdrs.GetCaptchaImg)
+
 	filesAPI := v1.Group("/fs")
 	filesAPI.POST("/files", fileHdrs.Create)
 	filesAPI.DELETE("/files", fileHdrs.Delete)

src/server/server_concurrency_test.go

@@ -18,7 +18,8 @@ func TestConcurrency(t *testing.T) {
 		"users": {
 			"enableAuth": true,
 			"minUserNameLen": 2,
-			"minPwdLen": 4
+			"minPwdLen": 4,
+			"captchaEnabled": false
 		},
 		"server": {
 			"debug": true

src/server/server_files_test.go

@@ -21,7 +21,8 @@ func TestFileHandlers(t *testing.T) {
 		"users": {
 			"enableAuth": true,
 			"minUserNameLen": 2,
-			"minPwdLen": 4
+			"minPwdLen": 4,
+			"captchaEnabled": false
 		},
 		"server": {
 			"debug": true

src/server/server_users_test.go

@@ -19,7 +19,8 @@ func TestUsersHandlers(t *testing.T) {
 		"users": {
 			"enableAuth": true,
 			"minUserNameLen": 2,
-			"minPwdLen": 4
+			"minPwdLen": 4,
+			"captchaEnabled": false
 		},
 		"server": {
 			"debug": true