traefik/middlewares/tracing/wrapper.go

67 lines
1.6 KiB
Go
Raw Normal View History

2018-01-10 16:48:04 +00:00
package tracing
import (
"net/http"
"github.com/urfave/negroni"
)
// NegroniHandlerWrapper is used to wrap negroni handler middleware
type NegroniHandlerWrapper struct {
name string
next negroni.Handler
clientSpanKind bool
}
// HTTPHandlerWrapper is used to wrap http handler middleware
type HTTPHandlerWrapper struct {
name string
handler http.Handler
clientSpanKind bool
}
// NewNegroniHandlerWrapper return a negroni.Handler struct
func (t *Tracing) NewNegroniHandlerWrapper(name string, handler negroni.Handler, clientSpanKind bool) negroni.Handler {
if t.IsEnabled() && handler != nil {
return &NegroniHandlerWrapper{
name: name,
next: handler,
clientSpanKind: clientSpanKind,
}
}
return handler
}
// NewHTTPHandlerWrapper return a http.Handler struct
func (t *Tracing) NewHTTPHandlerWrapper(name string, handler http.Handler, clientSpanKind bool) http.Handler {
if t.IsEnabled() && handler != nil {
return &HTTPHandlerWrapper{
name: name,
handler: handler,
clientSpanKind: clientSpanKind,
}
}
return handler
}
func (t *NegroniHandlerWrapper) ServeHTTP(rw http.ResponseWriter, r *http.Request, next http.HandlerFunc) {
var finish func()
_, r, finish = StartSpan(r, t.name, t.clientSpanKind)
defer finish()
if t.next != nil {
t.next.ServeHTTP(rw, r, next)
}
}
func (t *HTTPHandlerWrapper) ServeHTTP(rw http.ResponseWriter, r *http.Request) {
var finish func()
_, r, finish = StartSpan(r, t.name, t.clientSpanKind)
defer finish()
if t.handler != nil {
t.handler.ServeHTTP(rw, r)
}
}