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verdaccio/website/translated_docs/es-ES/uplinks.md
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---
id: uplinks
title: "Uplinks"
---
Un * uplink* es un enlace a un registro externo que provee acceso a paquetes externos.
![Uplinks](/img/uplinks.png)
### Uso
```yaml
uplinks:
npmjs:
url: https://registry.npmjs.org/
server2:
url: http://mirror.local.net/
timeout: 100ms
server3:
url: http://mirror2.local.net:9000/
baduplink:
url: http://localhost:55666/
```
### Configuración
Puedes definir múltiples uplinks y cada uno de ellos debe tener un nombre único (key). Pueden tener las siguientes propiedades:
| Propiedad | Tipo | Requerido | Ejemplo | Soporte | Descripción | Por Defecto |
| ------------ | ------- | --------- | ------------------------------------- | ------- | --------------------------------------------------------------------------------------------------------------------------------- | ----------- |
| url | string | Yes | https://registry.npmjs.org/ | all | El dominio del registro | npmjs |
| ca | string | No | ~./ssl/client.crt' | all | Ubicación del certificado SSL | Desactivado |
| timeout | string | No | 100ms | all | timeout por petición | 30s |
| maxage | string | No | 10m | all | limite máximo de fallos de cada petición | 2m |
| fail_timeout | string | No | 10m | all | define el tiempo máximo cuando una petición falla | 5m |
| max_fails | number | No | 2 | all | límite máximo de fallos | 2 |
| cache | boolean | No | [true,false] | >= 2.1 | cache all remote tarballs in storage | true |
| auth | list | No | [ver abajo](uplinks.md#auth-property) | >= 2.5 | asigna el encabezado 'Autorización' [más información](http://blog.npmjs.org/post/118393368555/deploying-with-npm-private-modules) | desactivado |
| headers | list | No | ]] | all | listado de encabezados por uplink | desactivado |
| strict_ssl | boolean | No | [true,false] | >= 3.0 | Es verdadero, requiere que el certificado SSL sea válido. | true |
#### Propiedad auth
La propiedad `auth` te permite usar un token auth con un uplink. Usando la variable de entorno por defecto:
```yaml
uplinks:
private:
url: https://private-registry.domain.com/registry
auth:
type: bearer
token_env: true # defaults to `process.env['NPM_TOKEN']`
```
o a través de una variable de entorno específica:
```yaml
uplinks:
private:
url: https://private-registry.domain.com/registry
auth:
type: bearer
token_env: FOO_TOKEN
```
`token_env: FOO_TOKEN` utilizará internamente `process.env['FOO_TOKEN']`
o al especificar directamente un token:
```yaml
uplinks:
private:
url: https://private-registry.domain.com/registry
auth:
type: bearer
token: "token"
```
> Nota: `token` tiene prioridad sobre `token_env`
### Debes saber
* Verdaccio no usa Basic Authentication desde la versión `v2.3.0`. Todos los tokens generados por verdaccio están basados en JWT ([JSON Web Token](https://jwt.io/))
* Uplinks must be registries compatible with the `npm` endpoints. Por ejemplo: *verdaccio*, `sinopia@1.4.0`, * npmjs registry*, *yarn registry*, *JFrog*, *Nexus* y más.
* Definiendo el `caché` como falso te ayudará a ahorrar espacio en tu disco duro. Esto evitará almacenar `tarballs` pero [ mantendrá los metadatos en carpetas](https://github.com/verdaccio/verdaccio/issues/391).
* Excederse con múltiples uplinks puede ralentizar la búsqueda de tus paquetes debido a que cada solicitud que un cliente npm realiza, verdaccio hace una llamada por cada uplink.
* El formato (timeout, maxage y fail_timeout) sigue las [unidades de medida NGINX](http://nginx.org/en/docs/syntax.html)