Swift Client

Swift Client is a library for connecting to an OpenStack Swift storage server.
This project has been forked from https://github.com/stewartml/swift-client.

Example
``js
const SwiftClient = require('openstack-swift-client');
const authenticator = new SwiftClient.SwiftAuthenticator('https://orbit.brightbox.com/v1/acc-xxx', 'cli-xxx', 'my-password');

let client = new SwiftClient(authenticator);
let container = client.container('my-container');
container.get('test-file', process.stdout).then(() => {
console.log("Done!");
});
`


Installation

$ npm install --save openstack-swift-client

Documentation

The main class is SwiftClient, which can be imported as follows:

`js
import SwiftClient from 'swift-client';
`
or
`js
const SwiftClient = require('openstack-swift-client');
`

I'm just going to use ES2016 (with async and await) for brevity in this document.

$3


#### SwiftClient(authenticator)

Creates an instance of SwiftClient with the specified authenticator

| Argument | Description |
|----------|-------------|
| authenticator | an authenticator instance (see below) |

Example
`js
let client = new SwiftClient('https://orbit.brightbox.com/v1/acc-xxx', 'cli-xxx', 'my-password');
`

#### SwiftClient.SwiftAuthenticator(url, username, password)

Creates an instance of SwiftClientAuthenticator with the specified authentication information.

| Argument | Description |
|----------|-------------|
| url | the URL of the server |
| username | the username to authenticate with |
| password | the password to authenticate with |

Example
`js
let client = new SwiftClient(new SwiftClient.SwiftAuthenticator('https://orbit.brightbox.com/v1/acc-xxx', 'cli-xxx', 'my-password'));
`


#### SwiftClient.KeystoneV3Authenticator(credentials)

Creates an instance of KeystoneV3Authenticator with the specified authentication information.

| Argument | Description |
|----------|-------------|
| credentials | credential object |

Example
`js
let credentials = {
"endpointUrl": "https://os.eu-de-darz.msh.host:5000/v3",
"username": "user",
"password": "pasword",
"domainId": "e6efe92d05c2430ea7eb6f626815d0d8",
"projectId": "ff912d95d2eb46099e755cd268714d37",
"endpointUrlInterface": "public" // admin, internal or public. Value default: public
}

let client = new SwiftClient(new SwiftClient.KeystoneV3Authenticator(credentials));
`

#### SwiftClient#list(extra)

Gets an array of containers.

| Argument | Description |
|----------|-------------|
| extra | a hash of additional headers to send (optional) |

Example

`js
await client.list();

/* returns:
[
{name: 'container-name', count: 123, bytes: 12438468},
(...)
]
*/
`


#### SwiftClient#create(name, publicRead, meta, extra)

Creates a container.

| Argument | Description |
|----------|-------------|
| name | the name of the container to create |
| publicRead | true if the container is to be publicly readable; otherwise, false (optional) |
| meta | a hash of meta information to set on the container (optional) |
| extra | a hash of additional headers to send (optional) |


Example

`js
await client.create('my-container', true, {colour: 'blue'});
`


#### SwiftClient#update(name, meta, extra)

Updates the metadata associated with the specified container.

| Argument | Description |
|----------|-------------|
| name | the name of the container to update |
| meta | a hash of meta information to set on the container |
| extra | a hash of additional headers to send (optional) |


Example

`js
await client.update('my-container', {colour: 'red'});
`


#### SwiftClient#meta(name)

Gets the metadata associated with the specified container.

| Argument | Description |
|----------|-------------|
| name | the name of the container to get the metadata for |


Example

`js
let meta = await client.meta('my-container');

/*
meta is a hash of metadata, e.g.
{
colour: 'red'
}
*/
`


#### SwiftClient#delete(name)

Deletes the specified container.

| Argument | Description |
|----------|-------------|
| name | the name of the container to delete |


Example

`js
await client.delete('my-container');
`


#### SwiftClient#container(name)

Gets an instance of SwiftContainer for the specified container.

| Argument | Description |
|----------|-------------|
| name | the name of the container to get a SwiftContainer instance for |

Example

`js
let container = client.container('my-container');
`

#### SwiftClient#info()

Gets cluster configuration parameters


Example

`js
await client.info();

/* returns:

{
bulk_delete: { max_failed_deletes: 1000, max_deletes_per_request: 10000 },
(...),
swift:
{ max_file_size: 5368709122,
account_listing_limit: 10000,
(...),
max_container_name_length: 256
}
}
*/
`

$3

#### SwiftContainer#list(extra, query)

Gets an array of objects in the container.

| Argument | Description |
|----------|-------------|
| extra | a hash of additional headers to send (optional) |
| query | a query string or hash of additional query parameters to send (optional) |

Query parameters can be used to filter the result, e.g. list a pseudo-directory.

Example

`js
await container.list();

/* returns:
[
{
hash: '03b3aac569fab8b59dcf8f210f8d3bc8',
last_modified: '2017-03-31T13:27:56.042120',
bytes: 102400,
name: 'picture.png',
content_type: 'application/octet-stream'
},
(...)
]
*/
`


#### SwiftContainer#create(name, stream, meta, extra)

Creates an object.

| Argument | Description |
|----------|-------------|
| name | the name of the object to create |
| stream | a stream representing the file to upload |
| meta | a hash of meta information to set on the object (optional) |
| extra | a hash of additional headers to send (optional) |


Example

`js
let stream = fs.createReadStream('darkness-at-noon.txt');

await container.create('books/darkness-at-noon.txt',
stream, {author: 'Arthur Koestler'});
`

#### SwiftContainer#get(name, stream)

Gets an object.

| Argument | Description |
|----------|-------------|
| name | the name of the object to get |
| stream | a stream to pipe the object to |


Example

`js
let stream = fs.createWriteStream('darkness-at-noon.txt');
await container.get('books/darkness-at-noon.txt', stream);
`


#### SwiftContainer#update(name, meta, extra)

Updates the metadata associated with the specified object.

| Argument | Description |
|----------|-------------|
| name | the name of the object to update |
| meta | a hash of meta information to set on the object |
| extra | a hash of additional headers to send (optional) |


Example

`js
await container.update('books/darkness-at-noon.txt', {year: '1940'});
`


#### SwiftContainer#meta(name)

Gets the metadata associated with the specified object.

| Argument | Description |
|----------|-------------|
| name | the name of the object to get the metadata for |


Example

`js
let meta = await container.meta('books/darkness-at-noon.txt');

/*
meta is a hash of metadata, e.g.
{
author: 'Arthur Koestler',
year: '1940'
}
*/
`


#### SwiftContainer#delete(name, when)

Deletes the specified object. If when is a Date, the object is deleted at that date; if it is a number, the object is deleted after that many seconds; or if it is ommitted, the object is deleted immediately.

| Argument | Description |
|----------|-------------|
| name | the name of the object to delete |
| when | a Date representing when the object is to be deleted, or a number of seconds the object is to be deleted after (optional) |


Example

`js
// delete the object in 2 minutes time
await container.delete('books/darkness-at-noon.txt', 120);
``