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c4f79d455f
As kubernetes 1.24.0 is released, updating kubernetes dependencies to 1.24.0 updates: #3086 Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>
36 lines
1.6 KiB
Go
36 lines
1.6 KiB
Go
package restful
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// Copyright 2013 Ernest Micklei. All rights reserved.
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// Use of this source code is governed by a license
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// that can be found in the LICENSE file.
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// FilterChain is a request scoped object to process one or more filters before calling the target RouteFunction.
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type FilterChain struct {
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Filters []FilterFunction // ordered list of FilterFunction
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Index int // index into filters that is currently in progress
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Target RouteFunction // function to call after passing all filters
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}
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// ProcessFilter passes the request,response pair through the next of Filters.
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// Each filter can decide to proceed to the next Filter or handle the Response itself.
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func (f *FilterChain) ProcessFilter(request *Request, response *Response) {
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if f.Index < len(f.Filters) {
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f.Index++
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f.Filters[f.Index-1](request, response, f)
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} else {
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f.Target(request, response)
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}
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}
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// FilterFunction definitions must call ProcessFilter on the FilterChain to pass on the control and eventually call the RouteFunction
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type FilterFunction func(*Request, *Response, *FilterChain)
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// NoBrowserCacheFilter is a filter function to set HTTP headers that disable browser caching
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// See examples/restful-no-cache-filter.go for usage
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func NoBrowserCacheFilter(req *Request, resp *Response, chain *FilterChain) {
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resp.Header().Set("Cache-Control", "no-cache, no-store, must-revalidate") // HTTP 1.1.
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resp.Header().Set("Pragma", "no-cache") // HTTP 1.0.
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resp.Header().Set("Expires", "0") // Proxies.
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chain.ProcessFilter(req, resp)
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}
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