mirror of https://github.com/prometheus/prometheus
39 lines
966 B
Go
39 lines
966 B
Go
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// +build go1.7
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package httprouter
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import (
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"context"
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"net/http"
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)
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type paramsKey struct{}
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// ParamsKey is the request context key under which URL params are stored.
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//
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// This is only present from go 1.7.
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var ParamsKey = paramsKey{}
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// Handler is an adapter which allows the usage of an http.Handler as a
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// request handle. With go 1.7+, the Params will be available in the
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// request context under ParamsKey.
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func (r *Router) Handler(method, path string, handler http.Handler) {
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r.Handle(method, path,
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func(w http.ResponseWriter, req *http.Request, p Params) {
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ctx := req.Context()
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ctx = context.WithValue(ctx, ParamsKey, p)
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req = req.WithContext(ctx)
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handler.ServeHTTP(w, req)
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},
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)
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}
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// ParamsFromContext pulls the URL parameters from a request context,
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// or returns nil if none are present.
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//
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// This is only present from go 1.7.
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func ParamsFromContext(ctx context.Context) Params {
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p, _ := ctx.Value(ParamsKey).(Params)
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return p
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}
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