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147 lines
3.9 KiB
Markdown
147 lines
3.9 KiB
Markdown
---
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id: dev-plugins
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title: "Developing Plugins"
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---
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There are many ways to extend `verdaccio`, currently we support `authentication plugins`, `middleware plugins` (since `v2.7.0`) and `storage plugins` since (`v3.x`).
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## Authentication Plugins
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This section will describe how it looks like a Verdaccio plugin in a ES5 way. Basically we have to return an object with a single method called `authenticate` that will recieve 3 arguments (`user, password, callback`). Once the authentication has been executed there is 2 options to give a response to `verdaccio`.
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### API
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```js
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function authenticate (user, password, callback) {
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...more stuff
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}
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```
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##### OnError
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Either something bad happened or auth was unsuccessful.
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```
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callback(null, false)
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```
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##### OnSuccess
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The auth was successful.
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`groups` is an array of strings where the user is part of.
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```
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callback(null, groups);
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```
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### Example
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```javascript
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function Auth(config, stuff) {
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var self = Object.create(Auth.prototype);
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self._users = {};
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// config for this module
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self._config = config;
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// verdaccio logger
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self._logger = stuff.logger;
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// pass verdaccio logger to ldapauth
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self._config.client_options.log = stuff.logger;
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return self;
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}
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Auth.prototype.authenticate = function (user, password, callback) {
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var LdapClient = new LdapAuth(self._config.client_options);
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....
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LdapClient.authenticate(user, password, function (err, ldapUser) {
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...
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var groups;
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...
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callback(null, groups);
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});
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};
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module.exports = Auth;
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```
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And the setup
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```yaml
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auth:
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htpasswd:
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file: ./htpasswd
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```
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Where `htpasswd` is the sufix of the plugin name. eg: `verdaccio-htpasswd` and the rest of the body would be the plugin configuration params.
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## Middleware Integration
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Middleware plugins have the capability to modify the API layer, either adding new endpoints or intercepting requests. A pretty good example
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of middleware plugin is the (sinopia-github-oauth)[https://github.com/soundtrackyourbrand/sinopia-github-oauth]) compatible with `verdaccio`.
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### API
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```js
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function register_middlewares(expressApp, auth, storage) {
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...more stuff
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}
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```
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To register a middleware we need an object with a single method called `register_middlewares` that will recieve 3 arguments (`expressApp, auth, storage`).
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*Auth* is the authentification instance and *storage* is also the main Storage instance that will give you have access to all to the storage actions.
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## Storage Plugins
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Since `verdaccio@3.x` we also can plug a custom storage.
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### API
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The storage API is a bit more complex, you will need to create a class that return a `ILocalData` implementation. Please see details bellow.
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```js
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class LocalDatabase<ILocalData>{
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constructor(config: Config, logger: Logger): ILocalData;
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}
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interface ILocalData {
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add(name: string): SyncReturn;
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remove(name: string): SyncReturn;
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get(): StorageList;
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getPackageStorage(packageInfo: string): IPackageStorage;
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sync(): ?SyncReturn;
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}
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interface ILocalPackageManager {
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writeTarball(name: string): IUploadTarball;
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readTarball(name: string): IReadTarball;
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readPackage(fileName: string, callback: Callback): void;
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createPackage(name: string, value: any, cb: Callback): void;
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deletePackage(fileName: string, callback: Callback): void;
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removePackage(callback: Callback): void;
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updatePackage(pkgFileName: string,
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updateHandler: Callback,
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onWrite: Callback,
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transformPackage: Function,
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onEnd: Callback): void;
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savePackage(fileName: string, json: Package, callback: Callback): void;
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}
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interface IUploadTarball extends stream$PassThrough {
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abort(): void;
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done(): void;
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}
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interface IReadTarball extends stream$PassThrough {
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abort(): void;
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done(): void;
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}
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```
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> This API still is experimental and might change next minor versions. The default [LocalStorage plugin](https://github.com/verdaccio/local-storage) it comes built-in in `verdaccio` and it is being
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loaded if any storage plugin has been defined.
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