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35 lines
637 B
Go
35 lines
637 B
Go
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package requestid
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import (
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"context"
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"log"
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"net/http"
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"github.com/mholt/caddy/caddyhttp/httpserver"
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uuid "github.com/nu7hatch/gouuid"
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)
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// Handler is a middleware handler
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type Handler struct {
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Next httpserver.Handler
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}
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func (h Handler) ServeHTTP(w http.ResponseWriter, r *http.Request) (int, error) {
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reqid := UUID()
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c := context.WithValue(r.Context(), httpserver.RequestIDCtxKey, reqid)
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r = r.WithContext(c)
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return h.Next.ServeHTTP(w, r)
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}
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// UUID returns U4 UUID
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func UUID() string {
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u4, err := uuid.NewV4()
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if err != nil {
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log.Printf("[ERROR] generating request ID: %v", err)
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return ""
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}
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return u4.String()
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}
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