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# npm-registry-client
The code that npm uses to talk to the registry.
It handles all the caching and HTTP calls.
## Usage
```javascript
var RegClient = require('npm-registry-client')
var client = new RegClient(config)
var uri = "npm://registry.npmjs.org/npm"
var params = {timeout: 1000}
client.get(uri, params, function (error, data, raw, res) {
// error is an error if there was a problem.
// data is the parsed data object
// raw is the json string
// res is the response from couch
})
```
# Registry URLs
The registry calls take either a full URL pointing to a resource in the
registry, or a base URL for the registry as a whole (including the registry
path – but be sure to terminate the path with `/`). `http` and `https` URLs are
the only ones supported.
## Using the client
Every call to the client follows the same pattern:
* `uri` {String} The *fully-qualified* URI of the registry API method being
invoked.
* `params` {Object} Per-request parameters.
* `callback` {Function} Callback to be invoked when the call is complete.
### Credentials
Many requests to the registry can by authenticated, and require credentials
for authorization. These credentials always look the same:
* `username` {String}
* `password` {String}
* `email` {String}
* `alwaysAuth` {Boolean} Whether calls to the target registry are always
authed.
**or**
* `token` {String}
* `alwaysAuth` {Boolean} Whether calls to the target registry are always
authed.
## API
### client.adduser(uri, params, cb)
* `uri` {String} Base registry URL.
* `params` {Object} Object containing per-request properties.
* `auth` {Credentials}
* `cb` {Function}
* `error` {Error | null}
* `data` {Object} the parsed data object
* `raw` {String} the json
* `res` {Response Object} response from couch
Add a user account to the registry, or verify the credentials.
### client.deprecate(uri, params, cb)
* `uri` {String} Full registry URI for the deprecated package.
* `params` {Object} Object containing per-request properties.
* `version` {String} Semver version range.
* `message` {String} The message to use as a deprecation warning.
* `auth` {Credentials}
* `cb` {Function}
Deprecate a version of a package in the registry.
### client.get(uri, params, cb)
* `uri` {String} The complete registry URI to fetch
* `params` {Object} Object containing per-request properties.
* `timeout` {Number} Duration before the request times out. Optional
(default: never).
* `follow` {Boolean} Follow 302/301 responses. Optional (default: true).
* `staleOk` {Boolean} If there's cached data available, then return that to
the callback quickly, and update the cache the background. Optional
(default: false).
* `auth` {Credentials} Optional.
* `cb` {Function}
Fetches data from the registry via a GET request, saving it in the cache folder
with the ETag or the "Last Modified" timestamp.
### client.publish(uri, params, cb)
* `uri` {String} The registry URI for the package to publish.
* `params` {Object} Object containing per-request properties.
* `metadata` {Object} Package metadata.
* `body` {Stream} Stream of the package body / tarball.
* `auth` {Credentials}
* `cb` {Function}
Publish a package to the registry.
Note that this does not create the tarball from a folder.
### client.star(uri, params, cb)
* `uri` {String} The complete registry URI for the package to star.
* `params` {Object} Object containing per-request properties.
* `starred` {Boolean} True to star the package, false to unstar it. Optional
(default: false).
* `auth` {Credentials}
* `cb` {Function}
Star or unstar a package.
Note that the user does not have to be the package owner to star or unstar a
package, though other writes do require that the user be the package owner.
### client.stars(uri, params, cb)
* `uri` {String} The base URL for the registry.
* `params` {Object} Object containing per-request properties.
* `username` {String} Name of user to fetch starred packages for. Optional
(default: user in `auth`).
* `auth` {Credentials} Optional (required if `username` is omitted).
* `cb` {Function}
View your own or another user's starred packages.
### client.tag(uri, params, cb)
* `uri` {String} The complete registry URI to tag
* `params` {Object} Object containing per-request properties.
* `version` {String} Version to tag.
* `tag` {String} Tag name to apply.
* `auth` {Credentials}
* `cb` {Function}
Mark a version in the `dist-tags` hash, so that `pkg@tag` will fetch the
specified version.
### client.unpublish(uri, params, cb)
* `uri` {String} The complete registry URI of the package to unpublish.
* `params` {Object} Object containing per-request properties.
* `version` {String} version to unpublish. Optional – omit to unpublish all
versions.
* `auth` {Credentials}
* `cb` {Function}
Remove a version of a package (or all versions) from the registry. When the
last version us unpublished, the entire document is removed from the database.
### client.whoami(uri, params, cb)
* `uri` {String} The base registry for the URI.
* `params` {Object} Object containing per-request properties.
* `auth` {Credentials}
* `cb` {Function}
Simple call to see who the registry thinks you are. Especially useful with
token-based auth.
## PLUMBING
The below are primarily intended for use by the rest of the API, or by the npm
caching logic directly.
### client.request(uri, params, cb)
* `uri` {String} URI pointing to the resource to request.
* `params` {Object} Object containing per-request properties.
* `method` {String} HTTP method. Optional (default: "GET").
* `body` {Stream | Buffer | String | Object} The request body. Objects
that are not Buffers or Streams are encoded as JSON. Optional – body
only used for write operations.
* `etag` {String} The cached ETag. Optional.
* `lastModified` {String} The cached Last-Modified timestamp. Optional.
* `follow` {Boolean} Follow 302/301 responses. Optional (default: true).
* `auth` {Credentials} Optional.
* `cb` {Function}
* `error` {Error | null}
* `data` {Object} the parsed data object
* `raw` {String} the json
* `res` {Response Object} response from couch
Make a generic request to the registry. All the other methods are wrappers
around `client.request`.
### client.fetch(uri, params, cb)
* `uri` {String} The complete registry URI to upload to
* `params` {Object} Object containing per-request properties.
* `headers` {Stream} HTTP headers to be included with the request. Optional.
* `auth` {Credentials} Optional.
* `cb` {Function}
Fetch a package from a URL, with auth set appropriately if included. Used to
cache remote tarballs as well as request package tarballs from the registry.
# Configuration
The client uses its own configuration, which is just passed in as a simple
nested object. The following are the supported values (with their defaults, if
any):
* `proxy.http` {URL} The URL to proxy HTTP requests through.
* `proxy.https` {URL} The URL to proxy HTTPS requests through. Defaults to be
the same as `proxy.http` if unset.
* `proxy.localAddress` {IP} The local address to use on multi-homed systems.
* `ssl.ca` {String} Cerficate signing authority certificates to trust.
* `ssl.certificate` {String} Client certificate (PEM encoded). Enable access
to servers that require client certificates.
* `ssl.key` {String} Private key (PEM encoded) for client certificate.
* `ssl.strict` {Boolean} Whether or not to be strict with SSL certificates.
Default = `true`
* `retry.count` {Number} Number of times to retry on GET failures. Default = 2.
* `retry.factor` {Number} `factor` setting for `node-retry`. Default = 10.
* `retry.minTimeout` {Number} `minTimeout` setting for `node-retry`.
Default = 10000 (10 seconds)
* `retry.maxTimeout` {Number} `maxTimeout` setting for `node-retry`.
Default = 60000 (60 seconds)
* `userAgent` {String} User agent header to send. Default =
`"node/{process.version}"`
* `log` {Object} The logger to use. Defaults to `require("npmlog")` if
that works, otherwise logs are disabled.
* `defaultTag` {String} The default tag to use when publishing new packages.
Default = `"latest"`
* `couchToken` {Object} A token for use with
[couch-login](https://npmjs.org/package/couch-login).
* `sessionToken` {string} A random identifier for this set of client requests.
Default = 8 random hexadecimal bytes.
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