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validator.go
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validator.go
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package handlers
import (
"errors"
"fmt"
"net/url"
"strconv"
"strings"
routing_api "code.cloudfoundry.org/routing-api"
"code.cloudfoundry.org/routing-api/models"
)
//go:generate counterfeiter -o fakes/fake_validator.go . RouteValidator
type RouteValidator interface {
ValidateCreate(routes []models.Route, maxTTL int) *routing_api.Error
ValidateDelete(routes []models.Route) *routing_api.Error
ValidateCreateTcpRouteMapping(tcpRouteMappings []models.TcpRouteMapping, routerGroups models.RouterGroups, maxTTL int) *routing_api.Error
ValidateDeleteTcpRouteMapping(tcpRouteMappings []models.TcpRouteMapping) *routing_api.Error
}
type Validator struct{}
func NewValidator() Validator {
return Validator{}
}
func (v Validator) ValidateCreate(routes []models.Route, maxTTL int) *routing_api.Error {
for _, route := range routes {
err := requiredValidation(route)
if err != nil {
return err
}
if *route.TTL > maxTTL {
err := routing_api.NewError(routing_api.RouteInvalidError, fmt.Sprintf("Max ttl is %d", maxTTL))
return &err
}
if *route.TTL <= 0 {
err := routing_api.NewError(routing_api.RouteInvalidError, "Request requires a ttl greater than 0")
return &err
}
}
return nil
}
func (v Validator) ValidateDelete(routes []models.Route) *routing_api.Error {
for _, route := range routes {
err := requiredValidation(route)
if err != nil {
return err
}
}
return nil
}
func requiredValidation(route models.Route) *routing_api.Error {
err := validateRouteUrl(route.Route)
if err != nil {
return err
}
err = validateRouteServiceUrl(route.RouteServiceUrl)
if err != nil {
return err
}
if route.Port <= 0 {
err := routing_api.NewError(routing_api.RouteInvalidError, "Each route request requires a port greater than 0")
return &err
}
if route.Route == "" {
err := routing_api.NewError(routing_api.RouteInvalidError, "Each route request requires a valid route")
return &err
}
if route.IP == "" {
err := routing_api.NewError(routing_api.RouteInvalidError, "Each route request requires an IP")
return &err
}
return nil
}
func validateRouteUrl(route string) *routing_api.Error {
err := validateUrl(route)
if err != nil {
err := routing_api.NewError(routing_api.RouteInvalidError, err.Error())
return &err
}
return nil
}
func validateRouteServiceUrl(routeService string) *routing_api.Error {
if routeService == "" {
return nil
}
if !strings.HasPrefix(routeService, "https://") {
err := routing_api.NewError(routing_api.RouteServiceUrlInvalidError, "Route service url must use HTTPS.")
return &err
}
err := validateUrl(routeService)
if err != nil {
err := routing_api.NewError(routing_api.RouteServiceUrlInvalidError, err.Error())
return &err
}
return nil
}
func validateUrl(urlToValidate string) error {
if strings.ContainsAny(urlToValidate, "?#") {
return errors.New("Url cannot contain any of [?, #]")
}
parsedURL, err := url.Parse(urlToValidate)
if err != nil {
return err
}
if parsedURL.String() != urlToValidate {
return errors.New("Url cannot contain invalid characters")
}
return nil
}
func (v Validator) ValidateCreateTcpRouteMapping(tcpRouteMappings []models.TcpRouteMapping, routerGroups models.RouterGroups, maxTTL int) *routing_api.Error {
for _, tcpRouteMapping := range tcpRouteMappings {
err := validateTcpRouteMapping(tcpRouteMapping, true, maxTTL)
if err != nil {
return err
}
validGuid := false
for _, routerGroup := range routerGroups {
if tcpRouteMapping.RouterGroupGuid == routerGroup.Guid {
validGuid = true
break
}
}
if !validGuid {
err := routing_api.NewError(routing_api.TcpRouteMappingInvalidError,
"router_group_guid: "+tcpRouteMapping.RouterGroupGuid+" not found")
return &err
}
}
return nil
}
func (v Validator) ValidateDeleteTcpRouteMapping(tcpRouteMappings []models.TcpRouteMapping) *routing_api.Error {
for _, tcpRouteMapping := range tcpRouteMappings {
err := validateTcpRouteMapping(tcpRouteMapping, false, 0)
if err != nil {
return err
}
}
return nil
}
func validateTcpRouteMapping(tcpRouteMapping models.TcpRouteMapping, checkTTL bool, maxTTL int) *routing_api.Error {
if tcpRouteMapping.RouterGroupGuid == "" {
err := routing_api.NewError(routing_api.TcpRouteMappingInvalidError,
"Each tcp mapping requires a non empty router group guid. RouteMapping=["+tcpRouteMapping.String()+"]")
return &err
}
if tcpRouteMapping.ExternalPort <= 0 {
err := routing_api.NewError(routing_api.TcpRouteMappingInvalidError,
"Each tcp mapping requires a positive external port. RouteMapping=["+tcpRouteMapping.String()+"]")
return &err
}
if tcpRouteMapping.HostIP == "" {
err := routing_api.NewError(routing_api.TcpRouteMappingInvalidError,
"Each tcp mapping requires a non empty backend ip. RouteMapping=["+tcpRouteMapping.String()+"]")
return &err
}
if tcpRouteMapping.HostPort <= 0 {
err := routing_api.NewError(routing_api.TcpRouteMappingInvalidError,
"Each tcp mapping requires a positive backend port. RouteMapping=["+tcpRouteMapping.String()+"]")
return &err
}
if checkTTL && *tcpRouteMapping.TTL > maxTTL {
err := routing_api.NewError(routing_api.TcpRouteMappingInvalidError,
"Each tcp mapping requires TTL to be less than or equal to "+strconv.Itoa(int(maxTTL))+". RouteMapping=["+tcpRouteMapping.String()+"]")
return &err
}
if checkTTL && *tcpRouteMapping.TTL <= 0 {
err := routing_api.NewError(routing_api.TcpRouteMappingInvalidError,
"Each tcp route mapping requires a ttl greater than 0")
return &err
}
return nil
}