Initial QSfera import

Server/services/proxy/pkg/staticroutes/oidc_well-known.go

@@ -0,0 +1,51 @@
+package staticroutes
+
+import (
+	"io"
+	"net/http"
+	"net/url"
+	"path"
+)
+
+var (
+	wellKnownPath = "/.well-known/openid-configuration"
+)
+
+// OIDCWellKnownRewrite is a handler that rewrites the /.well-known/openid-configuration endpoint for external IDPs.
+func (s *StaticRouteHandler) oIDCWellKnownRewrite(issuer string) http.HandlerFunc {
+	oidcURL, _ := url.Parse(issuer)
+	oidcURL.Path = path.Join(oidcURL.Path, wellKnownPath)
+	return func(w http.ResponseWriter, r *http.Request) {
+		wellKnownRes, err := s.OidcHttpClient.Get(oidcURL.String())
+		if err != nil {
+			s.Logger.Error().
+				Err(err).
+				Str("handler", "oidc wellknown rewrite").
+				Str("url", oidcURL.String()).
+				Msg("get information from url failed")
+			w.WriteHeader(http.StatusInternalServerError)
+			return
+		}
+
+		defer wellKnownRes.Body.Close()
+
+		copyHeader(w.Header(), wellKnownRes.Header)
+		w.WriteHeader(wellKnownRes.StatusCode)
+		_, err = io.Copy(w, wellKnownRes.Body)
+		if err != nil {
+			s.Logger.Error().
+				Err(err).
+				Str("handler", "oidc wellknown rewrite").
+				Msg("copying response body failed")
+
+		}
+	}
+}
+
+func copyHeader(dst, src http.Header) {
+	for k, vv := range src {
+		for _, v := range vv {
+			dst.Add(k, v)
+		}
+	}
+}