// Validate if bucket exists.
	objAPI := api.ObjectAPI()
	if objAPI == nil {
		writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrServerNotInitialized), r.URL)
		return
	}

	vars := mux.Vars(r)
	bucketName := vars["bucket"]

	if bucketName == "" {
		if s3Error := checkRequestAuthType(ctx, r, policy.ListenNotificationAction, bucketName, ""); s3Error != ErrNone {

	objectAPI := api.ObjectAPI()
	if objectAPI == nil {
		writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrServerNotInitialized), r.URL)
		return
	}

	vars := mux.Vars(r)
	bucket := vars["bucket"]
	object, err := unescapePath(vars["object"])
	if err != nil {
		writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
		return
	}

	// Check for auth type to return S3 compatible error.

func (s *state) push(name string, value reflect.Value) {
	s.vars = append(s.vars, variable{name, value})
}

// mark returns the length of the variable stack.
func (s *state) mark() int {
	return len(s.vars)
}

// pop pops the variable stack up to the mark.
func (s *state) pop(mark int) {
	s.vars = s.vars[0:mark]
}

// setVar overwrites the last declared variable with the given name.

# bucket suffixes for the release in preference order. GCS doesn't
# give us an API for this, so we hardcode it.
#
# Assumed vars:
#   RELEASE_REGION_FALLBACK
#   REGIONAL_KUBE_ADDONS
#   ZONE
# Vars set:
#   PREFERRED_REGION
function set-preferred-region() {
  case ${ZONE} in
    asia-*)
      PREFERRED_REGION=("asia-northeast1" "us-central1" "europe-west6")
      ;;

</details>

### Revísalo

Abre tu navegador en <a href="http://127.0.0.1:8000/items/5?q=somequery" class="external-link" target="_blank">http://127.0.0.1:8000/items/5?q=somequery</a>.

Verás la respuesta de JSON cómo:

```JSON
{"item_id": 5, "q": "somequery"}
```

Ya creaste una API que:

* Recibe HTTP requests en los _paths_ `/` y `/items/{item_id}`.

  selfLink: selfLinkValue
  uid: uidValue
rules:
- apiGroups:
  - apiGroupsValue
  nonResourceURLs:
  - nonResourceURLsValue
  resourceNames:
  - resourceNamesValue
  resources:
  - resourcesValue
  verbs:

  selfLink: selfLinkValue
  uid: uidValue
rules:
- apiGroups:
  - apiGroupsValue
  nonResourceURLs:
  - nonResourceURLsValue
  resourceNames:
  - resourceNamesValue
  resources:
  - resourcesValue
  verbs:

// those functions such as [log.Printf]. It reports a variety of
// mistakes such as syntax errors in the format string and mismatches
// (of number and type) between the verbs and their arguments.
//
// See the documentation of the fmt package for the complete set of
// format operators and their operand types.
//
// # Examples
//
// The %d format operator requires an integer operand.

        "time": "2004-01-01T01:01:01Z",
        "fieldsType": "fieldsTypeValue",
        "fieldsV1": {},
        "subresource": "subresourceValue"
      }
    ]
  },
  "rules": [
    {
      "verbs": [
        "verbsValue"
      ],
      "apiGroups": [
        "apiGroupsValue"
      ],
      "resources": [
        "resourcesValue"
      ],
      "resourceNames": [
        "resourceNamesValue"

        "time": "2004-01-01T01:01:01Z",
        "fieldsType": "fieldsTypeValue",
        "fieldsV1": {},
        "subresource": "subresourceValue"
      }
    ]
  },
  "rules": [
    {
      "verbs": [
        "verbsValue"
      ],
      "apiGroups": [
        "apiGroupsValue"
      ],
      "resources": [
        "resourcesValue"
      ],
      "resourceNames": [
        "resourceNamesValue"