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package compat
import (
"fmt"
"net/http"
"github.com/containers/buildah"
"github.com/containers/libpod/pkg/api/handlers"
)
// Ping returns headers to client about the service
//
// This handler must always be the same for the compatibility and libpod URL trees!
// Clients will use the Header availability to test which backend engine is in use.
func Ping(w http.ResponseWriter, r *http.Request) {
w.Header().Set("API-Version", handlers.DefaultApiVersion)
w.Header().Set("BuildKit-Version", "")
w.Header().Set("Docker-Experimental", "true")
w.Header().Set("Cache-Control", "no-cache")
w.Header().Set("Pragma", "no-cache")
// API-Version and Libpod-API-Version may not always be equal
w.Header().Set("Libpod-API-Version", handlers.DefaultApiVersion)
w.Header().Set("Libpod-Buildha-Version", buildah.Version)
w.WriteHeader(http.StatusOK)
if r.Method == http.MethodGet {
fmt.Fprint(w, "OK")
}
fmt.Fprint(w, "\n")
}
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