func templateUpdate(w http.ResponseWriter, r *http.Request, token auth.Token) (err error) {
	var paramTemplate iaas.Template
	err = ParseInput(r, &paramTemplate)
	if err != nil {
		return err
	}
	templateName := r.URL.Query().Get(":template_name")
	dbTpl, err := iaas.FindTemplate(templateName)
	if err != nil {
		if err == mgo.ErrNotFound {
			return &errors.HTTP{Code: http.StatusNotFound, Message: "template not found"}
		}
		return err
	}
	iaasValue := InputValue(r, "IaaSName")
	if iaasValue != "" {
		dbTpl.IaaSName = iaasValue
	}
	iaasCtx := permission.Context(permTypes.CtxIaaS, dbTpl.IaaSName)
	allowed := permission.Check(token, permission.PermMachineTemplateUpdate, iaasCtx)
	if !allowed {
		return permission.ErrUnauthorized
	}
	evt, err := event.New(&event.Opts{
		Target:     event.Target{Type: event.TargetTypeIaas, Value: dbTpl.IaaSName},
		Kind:       permission.PermMachineTemplateUpdate,
		Owner:      token,
		CustomData: event.FormToCustomData(InputFields(r)),
		Allowed:    event.Allowed(permission.PermMachineReadEvents, iaasCtx),
	})
	if err != nil {
		return err
	}
	defer func() { evt.Done(err) }()
	return dbTpl.Update(&paramTemplate)
}
func templateUpdate(w http.ResponseWriter, r *http.Request, token auth.Token) (err error) {
	var paramTemplate iaas.Template
	err = ParseInput(r, &paramTemplate)
	if err != nil {
		return err
	}
	templateName := r.URL.Query().Get(":template_name")
	dbTpl, err := iaas.FindTemplate(templateName)
	if err != nil {
		if err == mgo.ErrNotFound {
			return &errors.HTTP{Code: http.StatusNotFound, Message: "template not found"}
		}
		return err
	}
	iaasValue := InputValue(r, "IaaSName")
	if iaasValue != "" {
		dbTpl.IaaSName = iaasValue
	}
	iaasCtx := permission.Context(permTypes.CtxIaaS, dbTpl.IaaSName)
	allowed := permission.Check(token, permission.PermMachineTemplateUpdate, iaasCtx)
	if !allowed {
		return permission.ErrUnauthorized
	}
	evt, err := event.New(&event.Opts{
		Target:     event.Target{Type: event.TargetTypeIaas, Value: dbTpl.IaaSName},
		Kind:       permission.PermMachineTemplateUpdate,
		Owner:      token,
		CustomData: event.FormToCustomData(InputFields(r)),
		Allowed:    event.Allowed(permission.PermMachineReadEvents, iaasCtx),
	})
	if err != nil {
		return err
	}
	defer func() { evt.Done(err) }()
	return dbTpl.Update(&paramTemplate)
}
// title: template update
// path: /iaas/templates/{template_name}
// method: PUT
// consume: application/x-www-form-urlencoded
// responses:
//   200: OK
//   400: Invalid data
//   401: Unauthorized
//   404: Not found