30 lines
657 B
Go
30 lines
657 B
Go
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package main
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import (
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"log"
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"net/http"
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"time"
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)
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// our base middleware implementation.
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type service func(http.Handler) http.Handler
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// chain load middleware services.
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func serviceLoader(h http.Handler, svcs ...service) http.Handler {
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for _, svc := range svcs {
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h = svc(h)
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}
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return h
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}
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// middleware for request length metrics.
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func requestMetrics(l *log.Logger) service {
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return func(h http.Handler) http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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start := time.Now()
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h.ServeHTTP(w, r)
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l.Printf("%s request to %s took %vns.", r.Method, r.URL.Path, time.Now().Sub(start).Nanoseconds())
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})
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}
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}
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