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/******************************************************************************
*
* Copyright 2018 Stefan Majewsky <majewsky@gmx.net>
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
******************************************************************************/
/*
Package schwift is a client library for OpenStack Swift
(https://github.com/openstack/swift, https://openstack.org).
It uses Gophercloud (https://github.com/gophercloud/gophercloud) for
authentication, so you usually start by obtaining a gophercloud.ServiceClient
for Swift like so:
authOptions, err := openstack.AuthOptionsFromEnv() // or build a gophercloud.AuthOptions instance yourself
provider, err := openstack.AuthenticatedClient(authOptions)
client, err := openstack.NewObjectStorageV1(provider, gophercloud.EndpointOpts{})
Or, if you use Swift's built-in authentication instead of Keystone:
provider, err := openstack.NewClient("http://swift.example.com:8080")
client, err := swauth.NewObjectStorageV1(provider, swauth.AuthOpts {
User: "project:user",
Key: "password",
})
Then, in both cases, you use schwift.AccountFromClient() to obtain a
schwift.Account instance, from which point you have access to all of schwift's
API.
Caching
When a GET or HEAD request is sent by an Account, Container or Object instance,
the headers associated with that thing will be stored in that instance and not
retrieved again.
obj := account.Container("foo").Object("bar")
hdr, err := obj.Headers() //sends HTTP request "HEAD <storage-url>/foo/bar"
...
hdr, err = obj.Headers() //returns cached values immediately
If this behavior is not desired, the Invalidate() method can be used to clear
caches on any Account, Container or Object instance.
*/
package schwift
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