kill oidc well known middleware and move it to static route

Signed-off-by: Christian Richter <crichter@owncloud.com>

services/proxy/pkg/middleware/oidc_well-known.go

@@ -1,56 +0,0 @@
-package middleware
-
-import (
-	"io"
-	"net/http"
-	"net/url"
-	"path"
-
-	"github.com/owncloud/ocis/v2/ocis-pkg/log"
-)
-
-var (
-	wellKnownPath = "/.well-known/openid-configuration"
-)
-
-// OIDCWellKnownRewrite is a middleware that rewrites the /.well-known/openid-configuration endpoint for external IDPs.
-func OIDCWellKnownRewrite(logger log.Logger, oidcISS string, rewrite bool, oidcClient *http.Client) func(http.Handler) http.Handler {
-
-	oidcURL, _ := url.Parse(oidcISS)
-	oidcURL.Path = path.Join(oidcURL.Path, wellKnownPath)
-
-	return func(next http.Handler) http.Handler {
-		return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-			if rewrite && path.Clean(r.URL.Path) == wellKnownPath {
-
-				wellKnownRes, err := oidcClient.Get(oidcURL.String())
-				if err != nil {
-					logger.Error().
-						Err(err).
-						Str("middleware", "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)
-				io.Copy(w, wellKnownRes.Body)
-
-				return
-			}
-			next.ServeHTTP(w, r)
-		})
-	}
-}
-
-func copyHeader(dst, src http.Header) {
-	for k, vv := range src {
-		for _, v := range vv {
-			dst.Add(k, v)
-		}
-	}
-}