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url.go
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url.go
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// Copyright 2015 CoreOS, Inc.
//
// 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 url
import (
"fmt"
"github.com/rancher/os/config/cloudinit/datasource"
"github.com/rancher/os/config/cloudinit/pkg"
"github.com/rancher/os/util/network"
)
type RemoteFile struct {
url string
lastError error
}
func NewDatasource(url string) *RemoteFile {
return &RemoteFile{url, nil}
}
func (f *RemoteFile) IsAvailable() bool {
network.SetProxyEnvironmentVariables()
client := pkg.NewHTTPClient()
_, f.lastError = client.GetRetry(f.url)
return (f.lastError == nil)
}
func (f *RemoteFile) Finish() error {
return nil
}
func (f *RemoteFile) String() string {
return fmt.Sprintf("%s: %s (lastError: %s)", f.Type(), f.url, f.lastError)
}
func (f *RemoteFile) AvailabilityChanges() bool {
return false
// TODO: we should trigger something to change the network state
/* if f.lastError != nil {
// if we have a Network error, then we should retry.
// otherwise, we've made a request to the server, and its said nope.
if _, ok := f.lastError.(pkg.ErrNetwork); !ok {
return false
}
}
return true
*/
}
func (f *RemoteFile) ConfigRoot() string {
return ""
}
func (f *RemoteFile) FetchMetadata() (datasource.Metadata, error) {
return datasource.Metadata{}, nil
}
func (f *RemoteFile) FetchUserdata() ([]byte, error) {
client := pkg.NewHTTPClient()
return client.GetRetry(f.url)
}
func (f *RemoteFile) Type() string {
return "url"
}