// beego filter handler for serve captcha image
func (c *Captcha) Handler(ctx *context.Context) {
var chars []byte
id := path.Base(ctx.Request.RequestURI)
if i := strings.Index(id, "."); i != -1 {
id = id[:i]
}
key := c.key(id)
if v, ok := c.store.Get(key).([]byte); ok {
chars = v
} else {
ctx.Output.SetStatus(404)
ctx.WriteString("captcha not found")
return
}
// reload captcha
if len(ctx.Input.Query("reload")) > 0 {
chars = c.genRandChars()
if err := c.store.Put(key, chars, c.Expiration); err != nil {
ctx.Output.SetStatus(500)
ctx.WriteString("captcha reload error")
beego.Error("Reload Create Captcha Error:", err)
return
}
}
img := NewImage(chars, c.StdWidth, c.StdHeight)
if _, err := img.WriteTo(ctx.ResponseWriter); err != nil {
beego.Error("Write Captcha Image Error:", err)
}
}
// reset all migration
// run all migration's down function
func Reset() error {
sm := sortMap(migrationMap)
i := 0
for j := len(sm) - 1; j >= 0; j-- {
v := sm[j]
if isRollBack(v.name) {
beego.Info("skip the", v.name)
time.Sleep(1 * time.Second)
continue
}
beego.Info("start reset:", v.name)
v.m.Reset()
v.m.Down()
err := v.m.Exec(v.name, "down")
if err != nil {
beego.Error("execute error:", err)
time.Sleep(2 * time.Second)
return err
}
i++
beego.Info("end reset:", v.name)
}
beego.Info("total success reset:", i, " migration")
time.Sleep(2 * time.Second)
return nil
}
// first Reset, then Upgrade
func Refresh() error {
err := Reset()
if err != nil {
beego.Error("execute error:", err)
time.Sleep(2 * time.Second)
return err
}
err = Upgrade(0)
return err
}
//rollback the migration by the name
func Rollback(name string) error {
if v, ok := migrationMap[name]; ok {
beego.Info("start rollback")
v.Reset()
v.Down()
err := v.Exec(name, "down")
if err != nil {
beego.Error("execute error:", err)
time.Sleep(2 * time.Second)
return err
}
beego.Info("end rollback")
time.Sleep(2 * time.Second)
return nil
} else {
beego.Error("not exist the migrationMap name:" + name)
time.Sleep(2 * time.Second)
return errors.New("not exist the migrationMap name:" + name)
}
}
// tempalte func for output html
func (c *Captcha) CreateCaptchaHtml() template.HTML {
value, err := c.CreateCaptcha()
if err != nil {
beego.Error("Create Captcha Error:", err)
return ""
}
// create html
return template.HTML(fmt.Sprintf(`<input type="hidden" name="%s" value="%s">`+
`<a class="captcha" href="javascript:">`+
`<img onclick="this.src=('%s%s.png?reload='+(new Date()).getTime())" class="captcha-img" src="%s%s.png">`+
`</a>`, c.FieldIdName, value, c.URLPrefix, value, c.URLPrefix, value))
}
// upgrate the migration from lasttime
func Upgrade(lasttime int64) error {
sm := sortMap(migrationMap)
i := 0
for _, v := range sm {
if v.created > lasttime {
beego.Info("start upgrade", v.name)
v.m.Reset()
v.m.Up()
err := v.m.Exec(v.name, "up")
if err != nil {
beego.Error("execute error:", err)
time.Sleep(2 * time.Second)
return err
}
beego.Info("end upgrade:", v.name)
i++
}
}
beego.Info("total success upgrade:", i, " migration")
time.Sleep(2 * time.Second)
return nil
}