27 lines
1.1 KiB
Go
27 lines
1.1 KiB
Go
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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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