31 lines
584 B
Go
31 lines
584 B
Go
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package handlerlog
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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 ctxKey int
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var (
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key ctxKey = 0
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)
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func FindHandler(mux *http.ServeMux) func(http.Handler) http.Handler {
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return func(next http.Handler) http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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ctx := r.Context()
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if _, pattern := mux.Handler(r); pattern != "" {
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ctx = context.WithValue(ctx, key, pattern)
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}
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next.ServeHTTP(w, r.WithContext(ctx))
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})
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}
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}
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func Pattern(r *http.Request) (string, bool) {
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pattern, ok := r.Context().Value(key).(string)
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return pattern, ok
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}
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