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24 lines
1.9 KiB
Markdown
24 lines
1.9 KiB
Markdown
---
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title: Built-in Middleware
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summary: Middleware components that come with SilverStripe Framework
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---
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# Built-in Middleware
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SilverStripe Framework has a number of Middleware components.
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You may find them in the [SilverStripe\Control\Middleware](api:SilverStripe\Control\Middleware) namespace.
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| Name | Description |
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| ---- | ----------- |
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| [AllowedHostsMiddleware](api:SilverStripe\Control\Middleware\AllowedHostsMiddleware) | Secures requests by only allowing a whitelist of Host values |
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| [CanonicalURLMiddleware](api:SilverStripe\Control\Middleware\CanonicalURLMiddleware) | URL normalisation and redirection |
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| [ChangeDetectionMiddleware](api:SilverStripe\Control\Middleware\ChangeDetectionMiddleware) | Change detection via Etag / IfModifiedSince headers, conditionally sending a 304 not modified if possible. |\
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| [ConfirmationMiddleware](api:SilverStripe\Control\Middleware\ConfirmationMiddleware) | Checks whether user manual confirmation is required for HTTPRequest |
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| [ExecMetricMiddleware](api:SilverStripe\Control\Middleware\ExecMetricMiddleware) | Display execution metrics in DEV mode |
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| [FlushMiddleware](api:SilverStripe\Control\Middleware\FlushMiddleware) | Triggers a call to flush() on all [Flushable](api:SilverStripe\Core\Flushable) implementors |
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| [HTTPCacheControlMiddleware](api:SilverStripe\Control\Middleware\HTTPCacheControlMiddleware) | Controls HTTP response cache headers |
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| [RateLimitMiddleware](api:SilverStripe\Control\Middleware\RateLimitMiddleware) | Access throttling, controls HTTP Retry-After header |
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| [SessionMiddleware](api:SilverStripe\Control\Middleware\SessionMiddleware) | PHP Session initialisation |
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| [TrustedProxyMiddleware](api:SilverStripe\Control\Middleware\TrustedProxyMiddleware) | Rewrites headers that provide IP and host details from upstream proxies |
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| [URLSpecialsMiddleware](api:SilverStripe\Control\Middleware\URLSpecialsMiddleware) | Controls some of the [URL special variables](../../debugging/url_variable_tools) |
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