// write renders a returned runtime.Object to the response as a stream or an encoded object. If the object
// returned by the response implements rest.ResourceStreamer that interface will be used to render the
// response. The Accept header and current API version will be passed in, and the output will be copied
// directly to the response body. If content type is returned it is used, otherwise the content type will
// be "application/octet-stream". All other objects are sent to standard JSON serialization.
func write(statusCode int, apiVersion string, codec runtime.Codec, object runtime.Object, w http.ResponseWriter, req *http.Request) {
if stream, ok := object.(rest.ResourceStreamer); ok {
out, flush, contentType, err := stream.InputStream(apiVersion, req.Header.Get("Accept"))
if err != nil {
errorJSONFatal(err, codec, w)
return
}
if out == nil {
// No output provided - return StatusNoContent
w.WriteHeader(http.StatusNoContent)
return
}
defer out.Close()
if len(contentType) == 0 {
contentType = "application/octet-stream"
}
w.Header().Set("Content-Type", contentType)
w.WriteHeader(statusCode)
writer := w.(io.Writer)
if flush {
writer = flushwriter.Wrap(w)
}
io.Copy(writer, out)
return
}
writeJSON(statusCode, codec, object, w, isPrettyPrint(req))
}
// handleContainerLogs handles containerLogs request against the Kubelet
func (s *Server) handleContainerLogs(w http.ResponseWriter, req *http.Request) {
defer req.Body.Close()
u, err := url.ParseRequestURI(req.RequestURI)
if err != nil {
s.error(w, err)
return
}
parts := strings.Split(u.Path, "/")
// req URI: /containerLogs/<podNamespace>/<podID>/<containerName>
var podNamespace, podID, containerName string
if len(parts) == 5 {
podNamespace = parts[2]
podID = parts[3]
containerName = parts[4]
} else {
http.Error(w, "Unexpected path for command running", http.StatusBadRequest)
return
}
if len(podID) == 0 {
http.Error(w, `{"message": "Missing podID."}`, http.StatusBadRequest)
return
}
if len(containerName) == 0 {
http.Error(w, `{"message": "Missing container name."}`, http.StatusBadRequest)
return
}
if len(podNamespace) == 0 {
http.Error(w, `{"message": "Missing podNamespace."}`, http.StatusBadRequest)
return
}
uriValues := u.Query()
follow, _ := strconv.ParseBool(uriValues.Get("follow"))
previous, _ := strconv.ParseBool(uriValues.Get("previous"))
tail := uriValues.Get("tail")
pod, ok := s.host.GetPodByName(podNamespace, podID)
if !ok {
http.Error(w, fmt.Sprintf("Pod %q does not exist", podID), http.StatusNotFound)
return
}
// Check if containerName is valid.
containerExists := false
for _, container := range pod.Spec.Containers {
if container.Name == containerName {
containerExists = true
}
}
if !containerExists {
http.Error(w, fmt.Sprintf("Container %q not found in Pod %q", containerName, podID), http.StatusNotFound)
return
}
if _, ok := w.(http.Flusher); !ok {
s.error(w, fmt.Errorf("unable to convert %v into http.Flusher", w))
return
}
fw := flushwriter.Wrap(w)
w.Header().Set("Transfer-Encoding", "chunked")
w.WriteHeader(http.StatusOK)
err = s.host.GetKubeletContainerLogs(kubecontainer.GetPodFullName(pod), containerName, tail, follow, previous, fw, fw)
if err != nil {
s.error(w, err)
return
}
}