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105 lines
3.3 KiB
Go
105 lines
3.3 KiB
Go
package middleware
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import (
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"context"
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"errors"
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"fmt"
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"net/http"
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"strings"
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"github.com/zitadel/logging"
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"github.com/zitadel/zitadel/internal/api/authz"
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zitadel_http "github.com/zitadel/zitadel/internal/api/http"
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"github.com/zitadel/zitadel/internal/i18n"
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"github.com/zitadel/zitadel/internal/telemetry/tracing"
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"github.com/zitadel/zitadel/internal/zerrors"
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)
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type instanceInterceptor struct {
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verifier authz.InstanceVerifier
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externalDomain string
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ignoredPrefixes []string
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translator *i18n.Translator
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}
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func InstanceInterceptor(verifier authz.InstanceVerifier, externalDomain string, translator *i18n.Translator, ignoredPrefixes ...string) *instanceInterceptor {
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return &instanceInterceptor{
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verifier: verifier,
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externalDomain: externalDomain,
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ignoredPrefixes: ignoredPrefixes,
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translator: translator,
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}
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}
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func (a *instanceInterceptor) Handler(next http.Handler) http.Handler {
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return a.HandlerFunc(next)
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}
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func (a *instanceInterceptor) HandlerFunc(next http.Handler) http.HandlerFunc {
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return func(w http.ResponseWriter, r *http.Request) {
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ctx, err := a.setInstanceIfNeeded(r.Context(), r)
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if err == nil {
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r = r.WithContext(ctx)
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next.ServeHTTP(w, r)
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return
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}
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origin := zitadel_http.DomainContext(r.Context())
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logging.WithFields("origin", origin.Origin(), "externalDomain", a.externalDomain).WithError(err).Error("unable to set instance")
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statusCode := http.StatusInternalServerError
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if zerrors.IsNotFound(err) {
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statusCode = http.StatusNotFound
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}
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zErr := new(zerrors.ZitadelError)
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if errors.As(err, &zErr) {
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zErr.SetMessage(a.translator.LocalizeFromRequest(r, zErr.GetMessage(), nil))
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http.Error(w, fmt.Sprintf("unable to set instance using origin %s (ExternalDomain is %s): %s", origin, a.externalDomain, zErr), statusCode)
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return
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}
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http.Error(w, fmt.Sprintf("unable to set instance using origin %s (ExternalDomain is %s)", origin, a.externalDomain), statusCode)
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}
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}
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func (a *instanceInterceptor) HandlerFuncWithError(next HandlerFuncWithError) HandlerFuncWithError {
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return func(w http.ResponseWriter, r *http.Request) error {
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ctx, err := a.setInstanceIfNeeded(r.Context(), r)
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if err != nil {
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origin := zitadel_http.DomainContext(r.Context())
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logging.WithFields("origin", origin.Origin(), "externalDomain", a.externalDomain).WithError(err).Error("unable to set instance")
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return err
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}
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r = r.WithContext(ctx)
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return next(w, r)
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}
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}
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func (a *instanceInterceptor) setInstanceIfNeeded(ctx context.Context, r *http.Request) (context.Context, error) {
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for _, prefix := range a.ignoredPrefixes {
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if strings.HasPrefix(r.URL.Path, prefix) {
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return ctx, nil
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}
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}
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return setInstance(ctx, a.verifier)
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}
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func setInstance(ctx context.Context, verifier authz.InstanceVerifier) (_ context.Context, err error) {
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authCtx, span := tracing.NewServerInterceptorSpan(ctx)
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defer func() { span.EndWithError(err) }()
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requestContext := zitadel_http.DomainContext(ctx)
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if requestContext.InstanceDomain() == "" {
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return nil, zerrors.ThrowNotFound(err, "INST-zWq7X", "Errors.Instance.NotFound")
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}
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instance, err := verifier.InstanceByHost(authCtx, requestContext.InstanceDomain(), requestContext.RequestedDomain())
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if err != nil {
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return nil, err
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}
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span.End()
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return authz.WithInstance(ctx, instance), nil
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}
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