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package server
import (
"context"
"fmt"
"net/http"
"runtime"
"github.com/containers/podman/v2/pkg/api/handlers/utils"
"github.com/containers/podman/v2/pkg/auth"
"github.com/google/uuid"
"github.com/sirupsen/logrus"
)
// APIHandler is a wrapper to enhance HandlerFunc's and remove redundant code
func (s *APIServer) APIHandler(h http.HandlerFunc) http.HandlerFunc {
return func(w http.ResponseWriter, r *http.Request) {
// http.Server hides panics, we want to see them and fix the cause.
defer func() {
err := recover()
if err != nil {
buf := make([]byte, 1<<20)
n := runtime.Stack(buf, true)
logrus.Warnf("Recovering from API handler panic: %v, %s", err, buf[:n])
// Try to inform client things went south... won't work if handler already started writing response body
utils.InternalServerError(w, fmt.Errorf("%v", err))
}
}()
// Wrapper to hide some boiler plate
fn := func(w http.ResponseWriter, r *http.Request) {
rid := uuid.New().String()
logrus.Infof("APIHandler(%s) -- %s %s BEGIN", rid, r.Method, r.URL.String())
if logrus.IsLevelEnabled(logrus.DebugLevel) {
for k, v := range r.Header {
switch auth.HeaderAuthName(k) {
case auth.XRegistryConfigHeader, auth.XRegistryAuthHeader:
logrus.Debugf("APIHandler(%s) -- Header: %s=<hidden>", rid, k)
default:
logrus.Debugf("APIHandler(%s) -- Header: %s=%v", rid, k, v)
}
}
}
// Set in case handler wishes to correlate logging events
r.Header.Set("X-Reference-Id", rid)
if err := r.ParseForm(); err != nil {
logrus.Infof("Failed Request: unable to parse form: %q (%s)", err, rid)
}
// TODO: Use r.ConnContext when ported to go 1.13
c := context.WithValue(r.Context(), "decoder", s.Decoder) // nolint
c = context.WithValue(c, "runtime", s.Runtime) // nolint
c = context.WithValue(c, "shutdownFunc", s.Shutdown) // nolint
c = context.WithValue(c, "idletracker", s.idleTracker) // nolint
r = r.WithContext(c)
cv := utils.APIVersion[utils.CompatTree][utils.CurrentAPIVersion]
w.Header().Set("API-Version", fmt.Sprintf("%d.%d", cv.Major, cv.Minor))
lv := utils.APIVersion[utils.LibpodTree][utils.CurrentAPIVersion].String()
w.Header().Set("Libpod-API-Version", lv)
w.Header().Set("Server", "Libpod/"+lv+" ("+runtime.GOOS+")")
h(w, r)
logrus.Debugf("APIHandler(%s) -- %s %s END", rid, r.Method, r.URL.String())
}
fn(w, r)
}
}
// VersionedPath prepends the version parsing code
// any handler may override this default when registering URL(s)
func VersionedPath(p string) string {
return "/v{version:[0-9][0-9.]*}" + p
}
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