39 lines
1,013 B
Go
39 lines
1,013 B
Go
package rejectmethods
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import (
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"net/http"
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"github.com/prometheus/client_golang/prometheus"
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)
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var acceptedMethods = map[string]bool{
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http.MethodGet: true,
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http.MethodHead: true,
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http.MethodPost: true,
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http.MethodPut: true,
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http.MethodPatch: true,
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http.MethodDelete: true,
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http.MethodConnect: true,
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http.MethodOptions: true,
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http.MethodTrace: true,
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}
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var rejectedRequestsCount = prometheus.NewCounter(
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prometheus.CounterOpts{
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Name: "gitlab_workhorse_unknown_method_rejected_requests",
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Help: "The number of requests with unknown HTTP method which were rejected",
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},
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)
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// NewMiddleware returns middleware which rejects all unknown http methods
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func NewMiddleware(handler http.Handler) http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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if acceptedMethods[r.Method] {
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handler.ServeHTTP(w, r)
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} else {
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rejectedRequestsCount.Inc()
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http.Error(w, http.StatusText(http.StatusMethodNotAllowed), http.StatusMethodNotAllowed)
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}
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})
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}
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