forked from docker/machine
/
auth_util.go
127 lines (111 loc) · 2.92 KB
/
auth_util.go
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package google
import (
"encoding/gob"
"fmt"
"net/http"
"os"
"os/exec"
"path"
"path/filepath"
"strings"
"time"
"code.google.com/p/goauth2/oauth"
log "github.com/Sirupsen/logrus"
raw "google.golang.org/api/compute/v1"
)
const (
AuthURL = "https://accounts.google.com/o/oauth2/auth"
TokenURL = "https://accounts.google.com/o/oauth2/token"
ClientId = "22738965389-8arp8bah3uln9eoenproamovfjj1ac33.apps.googleusercontent.com"
ClientSecret = "qApc3amTyr5wI74vVrRWAfC_"
RedirectURI = "urn:ietf:wg:oauth:2.0:oob"
)
func newGCEService(storePath, authTokenPath string) (*raw.Service, error) {
client := newOauthClient(storePath, authTokenPath)
service, err := raw.New(client)
return service, err
}
func newOauthClient(storePath, authTokenPath string) *http.Client {
config := &oauth.Config{
ClientId: ClientId,
ClientSecret: ClientSecret,
Scope: raw.ComputeScope,
AuthURL: AuthURL,
TokenURL: TokenURL,
}
token := token(storePath, authTokenPath, config)
t := oauth.Transport{
Token: token,
Config: config,
Transport: http.DefaultTransport,
}
return t.Client()
}
func token(storePath, authTokenPath string, config *oauth.Config) *oauth.Token {
tokenPath := authTokenPath
if authTokenPath == "" {
tokenPath = filepath.Join(storePath, "gce_token")
}
log.Debugf("using auth token: %s", tokenPath)
token, err := tokenFromCache(tokenPath)
if err != nil {
token = tokenFromWeb(config)
saveToken(storePath, token)
}
return token
}
func tokenFromCache(tokenPath string) (*oauth.Token, error) {
f, err := os.Open(tokenPath)
if err != nil {
return nil, err
}
token := new(oauth.Token)
err = gob.NewDecoder(f).Decode(token)
return token, err
}
func tokenFromWeb(config *oauth.Config) *oauth.Token {
randState := fmt.Sprintf("st%d", time.Now().UnixNano())
config.RedirectURL = RedirectURI
authURL := config.AuthCodeURL(randState)
log.Info("Opening auth URL in browser.")
log.Info(authURL)
log.Info("If the URL doesn't open please open it manually and copy the code here.")
openURL(authURL)
code := getCodeFromStdin()
log.Infof("Got code: %s", code)
t := &oauth.Transport{
Config: config,
Transport: http.DefaultTransport,
}
_, err := t.Exchange(code)
if err != nil {
log.Fatalf("Token exchange error: %v", err)
}
return t.Token
}
func getCodeFromStdin() string {
fmt.Print("Enter code: ")
var code string
fmt.Scanln(&code)
return strings.Trim(code, "\n")
}
func openURL(url string) {
try := []string{"xdg-open", "google-chrome", "open"}
for _, bin := range try {
err := exec.Command(bin, url).Run()
if err == nil {
return
}
}
}
func saveToken(storePath string, token *oauth.Token) {
tokenPath := path.Join(storePath, "gce_token")
log.Infof("Saving token in %v", tokenPath)
f, err := os.Create(tokenPath)
if err != nil {
log.Infof("Warning: failed to cache oauth token: %v", err)
return
}
defer f.Close()
gob.NewEncoder(f).Encode(token)
}