9605b5edf2
Its easier to let each datasource grab all metadata in the FetchMetadata stage than to break it into multiple stages.
72 lines
1.8 KiB
Go
72 lines
1.8 KiB
Go
// Copyright 2015 CoreOS, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package metadata
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import (
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"strings"
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"github.com/coreos/coreos-cloudinit/pkg"
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)
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type MetadataService struct {
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Root string
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Client pkg.Getter
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ApiVersion string
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UserdataPath string
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MetadataPath string
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}
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func NewDatasource(root, apiVersion, userdataPath, metadataPath string) MetadataService {
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if !strings.HasSuffix(root, "/") {
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root += "/"
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}
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return MetadataService{root, pkg.NewHttpClient(), apiVersion, userdataPath, metadataPath}
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}
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func (ms MetadataService) IsAvailable() bool {
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_, err := ms.Client.Get(ms.Root + ms.ApiVersion)
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return (err == nil)
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}
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func (ms MetadataService) AvailabilityChanges() bool {
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return true
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}
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func (ms MetadataService) ConfigRoot() string {
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return ms.Root
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}
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func (ms MetadataService) FetchUserdata() ([]byte, error) {
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return ms.FetchData(ms.UserdataUrl())
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}
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func (ms MetadataService) FetchData(url string) ([]byte, error) {
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if data, err := ms.Client.GetRetry(url); err == nil {
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return data, err
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} else if _, ok := err.(pkg.ErrNotFound); ok {
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return []byte{}, nil
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} else {
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return data, err
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}
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}
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func (ms MetadataService) MetadataUrl() string {
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return (ms.Root + ms.MetadataPath)
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}
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func (ms MetadataService) UserdataUrl() string {
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return (ms.Root + ms.UserdataPath)
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}
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