Fix fetching SSH authorized keys from GCE

vendor/github.com/coreos/coreos-cloudinit/datasource/metadata/gce/metadata.go

@@ -1,89 +0,0 @@
-// Copyright 2016 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 gce
-
-import (
-	"fmt"
-	"net"
-	"net/http"
-
-	"github.com/coreos/coreos-cloudinit/datasource"
-	"github.com/coreos/coreos-cloudinit/datasource/metadata"
-)
-
-const (
-	apiVersion   = "computeMetadata/v1/"
-	metadataPath = apiVersion + "instance/"
-	userdataPath = apiVersion + "instance/attributes/user-data"
-)
-
-type metadataService struct {
-	metadata.MetadataService
-}
-
-func NewDatasource(root string) *metadataService {
-	return &metadataService{metadata.NewDatasource(root, apiVersion, userdataPath, metadataPath, http.Header{"Metadata-Flavor": {"Google"}})}
-}
-
-func (ms metadataService) FetchMetadata() (datasource.Metadata, error) {
-	public, err := ms.fetchIP("network-interfaces/0/access-configs/0/external-ip")
-	if err != nil {
-		return datasource.Metadata{}, err
-	}
-	local, err := ms.fetchIP("network-interfaces/0/ip")
-	if err != nil {
-		return datasource.Metadata{}, err
-	}
-	hostname, err := ms.fetchString("hostname")
-	if err != nil {
-		return datasource.Metadata{}, err
-	}
-
-	return datasource.Metadata{
-		PublicIPv4:  public,
-		PrivateIPv4: local,
-		Hostname:    hostname,
-	}, nil
-}
-
-func (ms metadataService) Type() string {
-	return "gce-metadata-service"
-}
-
-func (ms metadataService) fetchString(key string) (string, error) {
-	data, err := ms.FetchData(ms.MetadataUrl() + key)
-	if err != nil {
-		return "", err
-	}
-
-	return string(data), nil
-}
-
-func (ms metadataService) fetchIP(key string) (net.IP, error) {
-	str, err := ms.fetchString(key)
-	if err != nil {
-		return nil, err
-	}
-
-	if str == "" {
-		return nil, nil
-	}
-
-	if ip := net.ParseIP(str); ip != nil {
-		return ip, nil
-	} else {
-		return nil, fmt.Errorf("couldn't parse %q as IP address", str)
-	}
-}