/
forwardtokenfield.go
88 lines (71 loc) · 1.9 KB
/
forwardtokenfield.go
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package auth
import (
"fmt"
log "github.com/sirupsen/logrus"
"github.com/zalando/skipper/filters"
"golang.org/x/net/http/httpguts"
)
const (
// Deprecated, use filters.ForwardTokenFieldName instead
ForwardTokenFieldName = filters.ForwardTokenFieldName
)
type (
forwardTokenFieldSpec struct{}
forwardTokenFieldFilter struct {
HeaderName string
Field string
}
)
// NewForwardTokenField creates a filter to forward fields from token info or
// token introspection or oidc user info as headers to the backend server.
func NewForwardTokenField() filters.Spec {
return &forwardTokenFieldSpec{}
}
func (s *forwardTokenFieldSpec) Name() string {
return filters.ForwardTokenFieldName
}
func (*forwardTokenFieldSpec) CreateFilter(args []interface{}) (filters.Filter, error) {
if len(args) != 2 {
return nil, filters.ErrInvalidFilterParameters
}
headerName, ok := args[0].(string)
if !ok {
return nil, filters.ErrInvalidFilterParameters
}
valid := httpguts.ValidHeaderFieldName(headerName)
if !valid {
return nil, fmt.Errorf("header name %s is invalid", headerName)
}
field, ok := args[1].(string)
if !ok {
return nil, filters.ErrInvalidFilterParameters
}
return &forwardTokenFieldFilter{HeaderName: headerName, Field: field}, nil
}
func (f *forwardTokenFieldFilter) Request(ctx filters.FilterContext) {
payload := getPayload(ctx, tokeninfoCacheKey)
if payload == nil {
payload = getPayload(ctx, tokenintrospectionCacheKey)
}
if payload == nil {
payload = getPayload(ctx, oidcClaimsCacheKey)
}
if payload == nil {
return
}
err := setHeaders(map[string]string{
f.HeaderName: f.Field,
}, ctx, payload)
if err != nil {
log.Error(err)
return
}
}
func (*forwardTokenFieldFilter) Response(filters.FilterContext) {}
func getPayload(ctx filters.FilterContext, cacheKey string) interface{} {
cachedValue, ok := ctx.StateBag()[cacheKey]
if !ok {
return nil
}
return cachedValue
}