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Set CORS headers for HTTP 404 and 405 errors (#2599)

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* Set CORS headers for the 404s

* Use custom handlers, plus one for HTTP 405 too

* Tweak setup

* Add to muxes too

* Tidy up some more

* Use built-in HTTP 404 handler

* Don't bother setting it for federation-facing
This commit is contained in:
Neil Alexander 2022-08-01 11:34:27 +01:00 committed by GitHub
parent 645f31ae24
commit c7f7aec4d0
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1 changed files with 21 additions and 0 deletions
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21
setup/base/base.go
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@ -369,6 +369,25 @@ func (b *BaseDendrite) CreateFederationClient() *gomatrixserverlib.FederationCli
return client
}
func (b *BaseDendrite) configureHTTPErrors() {
notAllowedHandler := func(w http.ResponseWriter, r *http.Request) {
w.WriteHeader(http.StatusMethodNotAllowed)
_, _ = w.Write([]byte(fmt.Sprintf("405 %s not allowed on this endpoint", r.Method)))
}
notFoundCORSHandler := httputil.WrapHandlerInCORS(http.NotFoundHandler())
notAllowedCORSHandler := httputil.WrapHandlerInCORS(http.HandlerFunc(notAllowedHandler))
for _, router := range []*mux.Router{
b.PublicClientAPIMux, b.PublicMediaAPIMux,
b.DendriteAdminMux, b.SynapseAdminMux,
b.PublicWellKnownAPIMux,
} {
router.NotFoundHandler = notFoundCORSHandler
router.MethodNotAllowedHandler = notAllowedCORSHandler
}
}
// SetupAndServeHTTP sets up the HTTP server to serve endpoints registered on
// ApiMux under /api/ and adds a prometheus handler under /metrics.
func (b *BaseDendrite) SetupAndServeHTTP(
@ -409,6 +428,8 @@ func (b *BaseDendrite) SetupAndServeHTTP(
}
}
b.configureHTTPErrors()
internalRouter.PathPrefix(httputil.InternalPathPrefix).Handler(b.InternalAPIMux)
if b.Cfg.Global.Metrics.Enabled {
internalRouter.Handle("/metrics", httputil.WrapHandlerInBasicAuth(promhttp.Handler(), b.Cfg.Global.Metrics.BasicAuth))