|  | @ -4,7 +4,6 @@ import ( | 
			
		
	
		
		
			
				
					|  |  | 	"context" |  |  | 	"context" | 
			
		
	
		
		
			
				
					|  |  | 	"net/http" |  |  | 	"net/http" | 
			
		
	
		
		
			
				
					|  |  | 	"strconv" |  |  | 	"strconv" | 
			
		
	
		
		
			
				
					|  |  | 	"strings" |  |  |  | 
			
		
	
		
		
			
				
					|  |  | 	"sync" |  |  | 	"sync" | 
			
		
	
		
		
			
				
					|  |  | 	"time" |  |  | 	"time" | 
			
		
	
		
		
			
				
					|  |  | 
 |  |  | 
 | 
			
		
	
	
		
		
			
				
					|  | @ -109,7 +108,7 @@ func newMetricsInstrumentedHandler(handler string, mh MiddlewareHandler) *metric | 
			
		
	
		
		
			
				
					|  |  | func (h *metricsInstrumentedHandler) ServeHTTP(w http.ResponseWriter, r *http.Request, next Handler) error { |  |  | func (h *metricsInstrumentedHandler) ServeHTTP(w http.ResponseWriter, r *http.Request, next Handler) error { | 
			
		
	
		
		
			
				
					|  |  | 	server := serverNameFromContext(r.Context()) |  |  | 	server := serverNameFromContext(r.Context()) | 
			
		
	
		
		
			
				
					|  |  | 	labels := prometheus.Labels{"server": server, "handler": h.handler} |  |  | 	labels := prometheus.Labels{"server": server, "handler": h.handler} | 
			
		
	
		
		
			
				
					
					|  |  | 	method := strings.ToUpper(r.Method) |  |  | 	method := sanitizeMethod(r.Method) | 
			
				
				
			
		
	
		
		
	
		
		
			
				
					|  |  | 	// the "code" value is set later, but initialized here to eliminate the possibility
 |  |  | 	// the "code" value is set later, but initialized here to eliminate the possibility
 | 
			
		
	
		
		
			
				
					|  |  | 	// of a panic
 |  |  | 	// of a panic
 | 
			
		
	
		
		
			
				
					|  |  | 	statusLabels := prometheus.Labels{"server": server, "handler": h.handler, "method": method, "code": ""} |  |  | 	statusLabels := prometheus.Labels{"server": server, "handler": h.handler, "method": method, "code": ""} | 
			
		
	
	
		
		
			
				
					|  | @ -160,6 +159,30 @@ func sanitizeCode(code int) string { | 
			
		
	
		
		
			
				
					|  |  | 	return strconv.Itoa(code) |  |  | 	return strconv.Itoa(code) | 
			
		
	
		
		
			
				
					|  |  | } |  |  | } | 
			
		
	
		
		
			
				
					|  |  | 
 |  |  | 
 | 
			
		
	
		
		
			
				
					|  |  |  |  |  | // Only support the list of "regular" HTTP methods, see
 | 
			
		
	
		
		
			
				
					|  |  |  |  |  | // https://developer.mozilla.org/en-US/docs/Web/HTTP/Methods
 | 
			
		
	
		
		
			
				
					|  |  |  |  |  | var methodMap = map[string]string{ | 
			
		
	
		
		
			
				
					|  |  |  |  |  | 	"GET": http.MethodGet, "get": http.MethodGet, | 
			
		
	
		
		
			
				
					|  |  |  |  |  | 	"HEAD": http.MethodHead, "head": http.MethodHead, | 
			
		
	
		
		
			
				
					|  |  |  |  |  | 	"PUT": http.MethodPut, "put": http.MethodPut, | 
			
		
	
		
		
			
				
					|  |  |  |  |  | 	"POST": http.MethodPost, "post": http.MethodPost, | 
			
		
	
		
		
			
				
					|  |  |  |  |  | 	"DELETE": http.MethodDelete, "delete": http.MethodDelete, | 
			
		
	
		
		
			
				
					|  |  |  |  |  | 	"CONNECT": http.MethodConnect, "connect": http.MethodConnect, | 
			
		
	
		
		
			
				
					|  |  |  |  |  | 	"OPTIONS": http.MethodOptions, "options": http.MethodOptions, | 
			
		
	
		
		
			
				
					|  |  |  |  |  | 	"TRACE": http.MethodTrace, "trace": http.MethodTrace, | 
			
		
	
		
		
			
				
					|  |  |  |  |  | 	"PATCH": http.MethodPatch, "patch": http.MethodPatch, | 
			
		
	
		
		
			
				
					|  |  |  |  |  | } | 
			
		
	
		
		
			
				
					|  |  |  |  |  | 
 | 
			
		
	
		
		
			
				
					|  |  |  |  |  | // sanitizeMethod sanitizes the method for use as a metric label. This helps
 | 
			
		
	
		
		
			
				
					|  |  |  |  |  | // prevent high cardinality on the method label. The name is always upper case.
 | 
			
		
	
		
		
			
				
					|  |  |  |  |  | func sanitizeMethod(m string) string { | 
			
		
	
		
		
			
				
					|  |  |  |  |  | 	if m, ok := methodMap[m]; ok { | 
			
		
	
		
		
			
				
					|  |  |  |  |  | 		return m | 
			
		
	
		
		
			
				
					|  |  |  |  |  | 	} | 
			
		
	
		
		
			
				
					|  |  |  |  |  | 
 | 
			
		
	
		
		
			
				
					|  |  |  |  |  | 	return "other" | 
			
		
	
		
		
			
				
					|  |  |  |  |  | } | 
			
		
	
		
		
			
				
					|  |  |  |  |  | 
 | 
			
		
	
		
		
			
				
					|  |  | // taken from https://github.com/prometheus/client_golang/blob/6007b2b5cae01203111de55f753e76d8dac1f529/prometheus/promhttp/instrument_server.go#L298
 |  |  | // taken from https://github.com/prometheus/client_golang/blob/6007b2b5cae01203111de55f753e76d8dac1f529/prometheus/promhttp/instrument_server.go#L298
 | 
			
		
	
		
		
			
				
					|  |  | func computeApproximateRequestSize(r *http.Request) int { |  |  | func computeApproximateRequestSize(r *http.Request) int { | 
			
		
	
		
		
			
				
					|  |  | 	s := 0 |  |  | 	s := 0 | 
			
		
	
	
		
		
			
				
					|  | 
 |