traefik/pkg/ping/ping.go

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package ping
import (
"context"
"fmt"
"net/http"
)
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// Handler expose ping routes.
type Handler struct {
EntryPoint string `description:"EntryPoint" export:"true" json:"entryPoint,omitempty" toml:"entryPoint,omitempty" yaml:"entryPoint,omitempty"`
ManualRouting bool `description:"Manual routing" json:"manualRouting,omitempty" toml:"manualRouting,omitempty" yaml:"manualRouting,omitempty"`
terminating bool
}
// SetDefaults sets the default values.
func (h *Handler) SetDefaults() {
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h.EntryPoint = "traefik"
}
// WithContext causes the ping endpoint to serve non 200 responses.
func (h *Handler) WithContext(ctx context.Context) {
go func() {
<-ctx.Done()
h.terminating = true
}()
}
func (h *Handler) ServeHTTP(response http.ResponseWriter, request *http.Request) {
statusCode := http.StatusOK
if h.terminating {
statusCode = http.StatusServiceUnavailable
}
response.WriteHeader(statusCode)
fmt.Fprint(response, http.StatusText(statusCode))
}