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Built-in Middleware

SilverStripe Framework has a number of Middleware components. You may find them in the SilverStripe\Control\Middleware namespace.

Name Description
AllowedHostsMiddleware Secures requests by only allowing a whitelist of Host values
CanonicalURLMiddleware URL normalisation and redirection
ChangeDetectionMiddleware Change detection via Etag / IfModifiedSince headers, conditionally sending a 304 not modified if possible. \
ConfirmationMiddleware Checks whether user manual confirmation is required for HTTPRequest
ExecMetricMiddleware Display execution metrics in DEV mode
FlushMiddleware Triggers a call to flush() on all Flushable implementors
HTTPCacheControlMiddleware Controls HTTP response cache headers
RateLimitMiddleware Access throttling, controls HTTP Retry-After header
SessionMiddleware PHP Session initialisation
TrustedProxyMiddleware Rewrites headers that provide IP and host details from upstream proxies
URLSpecialsMiddleware Controls some of the URL special variables

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