func main() {
if len(os.Args) == 1 {
fmt.Println("Usage: gauthtoken REFRESH_TOKEN")
os.Exit(1)
}
conf := oauth2.Config{
ClientID: "32555940559.apps.googleusercontent.com",
ClientSecret: "ZmssLNjJy2998hD4CTg2ejr2",
Endpoint: google.Endpoint,
RedirectURL: "oob",
}
refreshToken := &oauth2.Token{
AccessToken: "",
RefreshToken: os.Args[1],
Expiry: time.Now().UTC(),
}
token, err := conf.TokenSource(oauth2.NoContext, refreshToken).Token()
if err != nil {
log.Fatalln(err)
}
fmt.Println(token.AccessToken)
}
// CallbackHandler handles OAuth2 redirection URI requests by parsing the auth
// code and state, comparing with the state value from the ctx, and obtaining
// an OAuth2 Token.
func CallbackHandler(config *oauth2.Config, success, failure ctxh.ContextHandler) ctxh.ContextHandler {
if failure == nil {
failure = gologin.DefaultFailureHandler
}
fn := func(ctx context.Context, w http.ResponseWriter, req *http.Request) {
authCode, state, err := parseCallback(req)
if err != nil {
ctx = gologin.WithError(ctx, err)
failure.ServeHTTP(ctx, w, req)
return
}
ownerState, err := StateFromContext(ctx)
if err != nil {
ctx = gologin.WithError(ctx, err)
failure.ServeHTTP(ctx, w, req)
return
}
if state != ownerState || state == "" {
ctx = gologin.WithError(ctx, ErrInvalidState)
failure.ServeHTTP(ctx, w, req)
return
}
// use the authorization code to get a Token
token, err := config.Exchange(ctx, authCode)
if err != nil {
ctx = gologin.WithError(ctx, err)
failure.ServeHTTP(ctx, w, req)
return
}
ctx = WithToken(ctx, token)
success.ServeHTTP(ctx, w, req)
}
return ctxh.ContextHandlerFunc(fn)
}
func handleCallback(w http.ResponseWriter, r *http.Request, config *oauth2.Config, profilesURL, code string) {
token, err := config.Exchange(oauth2.NoContext, code)
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
client := config.Client(oauth2.NoContext, token)
response, err := client.Get(profilesURL)
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
defer response.Body.Close()
rawBody, err := ioutil.ReadAll(response.Body)
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
s, _ := session.Manager.SessionStart(w, r)
defer s.SessionRelease(w)
s.Set("id_token", token.Extra("id_token"))
s.Set("access_token", token.AccessToken)
s.Set("profile", string(rawBody))
http.Redirect(w, r, "/user", http.StatusMovedPermanently)
}
func handleOAuth2Callback(config *oauth2.Config, s sessions.Session, w http.ResponseWriter, r *http.Request) {
providedState := extractPath(r.URL.Query().Get("state"))
//fmt.Printf("Got state from request %s\n", providedState)
//verify that the provided state is the state we generated
//if it is not, then redirect to the error page
originalState := s.Get(keyState)
//fmt.Printf("Got state from session %s\n", originalState)
if providedState != originalState {
//http.Redirect(w, r, PathError, http.StatusFound)
//return
}
//next := s.Get(keyNextPage).(string)
//fmt.Printf("Got a next page from the session: %s\n", next)
next := ""
code := r.URL.Query().Get("code")
t, err := config.Exchange(oauth2.NoContext, code)
if err != nil {
// Pass the error message, or allow dev to provide its own
// error handler.
fmt.Println("There is some error in the code exchange")
http.Redirect(w, r, PathError, http.StatusFound)
return
}
// Store the credentials in the session.
val, _ := json.Marshal(t)
s.Set(KeyToken, maskval(val))
http.Redirect(w, r, next, http.StatusFound)
}
func tokenFromWeb(ctx context.Context, config *oauth2.Config) *oauth2.Token {
randState := fmt.Sprintf("st%d", time.Now().UnixNano())
tokenOnce.Do(func() {
http.HandleFunc("/oauth/", func(rw http.ResponseWriter, req *http.Request) {
if req.FormValue("state") != randState {
log.Printf("State doesn't match: req = %#v", req)
http.Error(rw, "", 500)
return
}
if code := req.FormValue("code"); code != "" {
fmt.Fprintf(rw, "<h1>Success</h1>Authorized.")
rw.(http.Flusher).Flush()
ch <- code
return
}
log.Printf("no code")
http.Error(rw, "", 500)
})
})
config.RedirectURL = "http://localhost:8383/oauth/"
authURL := config.AuthCodeURL(randState)
go openURL(authURL)
log.Printf("Authorize this app at: %s", authURL)
code := <-ch
log.Printf("Got code: %s", code)
token, err := config.Exchange(ctx, code)
if err != nil {
log.Fatalf("Token exchange error: %v", err)
}
return token
}
func (c *client) newUserToken(ctx context.Context, config *oauth2.Config, userID string) (*oauth2.Token, error) {
stateBytes := make([]byte, 32)
_, err := rand.Read(stateBytes)
if err != nil {
log.Fatalf("Unable to read random bytes: %v", err)
return nil, err
}
state := fmt.Sprintf("%x", stateBytes)
authURL := config.AuthCodeURL(state, oauth2.AccessTypeOffline)
authcode, err := c.GiveTokenPermissions(authURL)
if err != nil {
log.Fatalf("Error when getting token permissions: %v", err)
return nil, err
}
token, err := c.HandleOAuthCode(authcode)
if err != nil {
log.Fatalf("Error when handling OAuth Code error: %v", err)
return nil, err
}
c.SaveToken(userID, token) // save token to datastore
return token, nil
}
// Config does the initial creation of the token
func Config(name string, config *oauth2.Config) error {
// See if already have a token
tokenString := fs.ConfigFile.MustValue(name, "token")
if tokenString != "" {
fmt.Printf("Already have a token - refresh?\n")
if !fs.Confirm() {
return nil
}
}
// Generate a URL for the user to visit for authorization.
authUrl := config.AuthCodeURL("state")
fmt.Printf("Go to the following link in your browser\n")
fmt.Printf("%s\n", authUrl)
fmt.Printf("Log in, then type paste the token that is returned in the browser here\n")
// Read the code, and exchange it for a token.
fmt.Printf("Enter verification code> ")
authCode := fs.ReadLine()
token, err := config.Exchange(oauth2.NoContext, authCode)
if err != nil {
return fmt.Errorf("Failed to get token: %v", err)
}
return putToken(name, token)
}
// getTokenFromWeb uses Config to request a Token.
// It returns the retrieved Token.
func getTokenFromWeb(config *oauth2.Config) *oauth2.Token {
ch := make(chan string)
http.HandleFunc("/auth", func(rw http.ResponseWriter, req *http.Request) {
if code := req.FormValue("code"); code != "" {
fmt.Fprintf(rw, "<h1>Success</h1>Authorized.")
rw.(http.Flusher).Flush()
ch <- code
return
}
log.Printf("no code")
http.Error(rw, "", 500)
})
authURL := config.AuthCodeURL("state-token", oauth2.AccessTypeOffline)
go openUrl(authURL)
log.Printf("Authorize this app at: %s", authURL)
code := <-ch
log.Printf("received code")
tok, err := config.Exchange(oauth2.NoContext, code)
if err != nil {
log.Fatalf("Unable to retrieve token from web %v", err)
}
return tok
}
// facebookHandler is a ContextHandler that gets the OAuth2 Token from the ctx
// to get the corresponding Facebook User. If successful, the user is added to
// the ctx and the success handler is called. Otherwise, the failure handler
// is called.
func facebookHandler(config *oauth2.Config, success, failure ctxh.ContextHandler) ctxh.ContextHandler {
if failure == nil {
failure = gologin.DefaultFailureHandler
}
fn := func(ctx context.Context, w http.ResponseWriter, req *http.Request) {
token, err := oauth2Login.TokenFromContext(ctx)
if err != nil {
ctx = gologin.WithError(ctx, err)
failure.ServeHTTP(ctx, w, req)
return
}
httpClient := config.Client(ctx, token)
facebookService := newClient(httpClient)
user, resp, err := facebookService.Me()
err = validateResponse(user, resp, err)
if err != nil {
ctx = gologin.WithError(ctx, err)
failure.ServeHTTP(ctx, w, req)
return
}
ctx = WithUser(ctx, user)
success.ServeHTTP(ctx, w, req)
}
return ctxh.ContextHandlerFunc(fn)
}
func exchangeToken(ctx context.Context, config *oauth2.Config, code string) *oauth2.Token {
token, err := config.Exchange(ctx, code)
if err != nil {
glog.Fatalf("Token exchange error: %v", err)
}
return token
}
// NewRefreshTokenSource returns a token source that obtains its initial token
// based on the provided config and the refresh token.
func NewRefreshTokenSource(config *oauth2.Config, refreshToken string) oauth2.TokenSource {
var noInitialToken *oauth2.Token = nil
return oauth2.ReuseTokenSource(noInitialToken, config.TokenSource(
oauth2.NoContext, // TODO: maybe accept a context later.
&oauth2.Token{RefreshToken: refreshToken},
))
}
func (p *Engine) _google(code string) (*User, error) {
var cfg oauth2.Config
if err := p.Dao.Get("google.oauth", &cfg); err != nil {
return nil, err
}
tok, err := cfg.Exchange(oauth2.NoContext, code)
if err != nil {
return nil, err
}
cli := cfg.Client(oauth2.NoContext, tok)
res, err := cli.Get("https://www.googleapis.com/oauth2/v1/userinfo?alt=json")
if err != nil {
return nil, err
}
defer res.Body.Close()
var gu GoogleUser
dec := json.NewDecoder(res.Body)
if err := dec.Decode(&gu); err != nil {
return nil, err
}
return p.Dao.AddUser(gu.ID, "google", gu.Email, gu.Name, gu.Link, gu.Picture)
}
// googleHandler is a ContextHandler that gets the OAuth2 Token from the ctx
// to get the corresponding Google Userinfoplus. If successful, the user info
// is added to the ctx and the success handler is called. Otherwise, the
// failure handler is called.
func googleHandler(config *oauth2.Config, success, failure ctxh.ContextHandler) ctxh.ContextHandler {
if failure == nil {
failure = gologin.DefaultFailureHandler
}
fn := func(ctx context.Context, w http.ResponseWriter, req *http.Request) {
token, err := oauth2Login.TokenFromContext(ctx)
if err != nil {
ctx = gologin.WithError(ctx, err)
failure.ServeHTTP(ctx, w, req)
return
}
httpClient := config.Client(ctx, token)
googleService, err := google.New(httpClient)
if err != nil {
ctx = gologin.WithError(ctx, err)
failure.ServeHTTP(ctx, w, req)
return
}
userInfoPlus, err := googleService.Userinfo.Get().Do()
err = validateResponse(userInfoPlus, err)
if err != nil {
ctx = gologin.WithError(ctx, err)
failure.ServeHTTP(ctx, w, req)
return
}
ctx = WithUser(ctx, userInfoPlus)
success.ServeHTTP(ctx, w, req)
}
return ctxh.ContextHandlerFunc(fn)
}
/*
This auth function is a bootstrap until better integration with
gcloud auth can be provided. To use, set (and export) the environment
variable GCLOUD_APIS_REFRESH_TOKEN to a valid refresh token, which can
usually be acquired via $(gcloud auth print-refresh-token). In the
future, gcloud_apis will be able to fetch credential information from
the same place as gcloud, and will be usable without setting this
environment variable.
*/
func getAuthenticatedClient() (*http.Client, error) {
conf := oauth2.Config{
ClientID: "32555940559.apps.googleusercontent.com",
ClientSecret: "ZmssLNjJy2998hD4CTg2ejr2",
Endpoint: oauth2.Endpoint{
AuthURL: "https://accounts.google.com/o/oauth2/auth",
TokenURL: "https://accounts.google.com/o/oauth2/token",
},
Scopes: []string{"https://www.googleapis.com/auth/cloud-platform"},
}
var ts oauth2.TokenSource
refreshToken := os.Getenv("GCLOUD_APIS_REFRESH_TOKEN")
if refreshToken == "" {
ts = cliTokenSource{}
} else {
token := &oauth2.Token{
RefreshToken: refreshToken,
}
ts = conf.TokenSource(oauth2.NoContext, token)
}
oauth2Transport := &oauth2.Transport{
Source: ts,
}
client := &http.Client{
Transport: gcloudTransport{oauth2Transport},
}
return client, nil
}
// Ref: https://github.com/google/google-api-go-client/blob/master/examples/calendar.go
// Copyright 2014 The Go Authors. All rights reserved.
func tokenFromWeb(ctx context.Context, config *oauth2.Config) (*oauth2.Token, error) {
ch := make(chan string)
randState := fmt.Sprintf("st%d", time.Now().UnixNano())
ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
if r.URL.Path == "/favicon.ico" {
w.WriteHeader(http.StatusNotFound)
return
}
if r.FormValue("state") != randState {
w.WriteHeader(http.StatusInternalServerError)
return
}
if code := r.FormValue("code"); code != "" {
w.Write([]byte("<h1>Success</h1>Authorized."))
w.(http.Flusher).Flush()
ch <- code
return
}
// no code
w.WriteHeader(http.StatusInternalServerError)
}))
defer ts.Close()
config.RedirectURL = ts.URL
authURL := config.AuthCodeURL(randState)
fmt.Println("Access to %s", authURL)
code := <-ch
return config.Exchange(ctx, code)
}
func ExecuteFlow(ctx context.Context, config *oauth2.Config, options ...Option) (*oauth2.Token, error) {
o := processOpts(options)
configCopy := *config
config = &configCopy
code := make(chan string)
l, err := net.Listen("tcp", o.addr)
if err != nil {
return nil, err
}
defer l.Close()
config.RedirectURL = fmt.Sprintf("http://%s/", l.Addr().String())
go http.Serve(l, http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
fmt.Fprint(w, closeMessage)
code <- r.FormValue("code") // send code to OAuth flow
}))
url := config.AuthCodeURL("", oauth2.AccessTypeOffline)
if o.noBrowser {
fmt.Fprintln(os.Stderr, visitMessage)
} else if err := openURL(url); err != nil {
fmt.Fprintln(os.Stderr, visitMessage)
} else {
fmt.Fprintln(os.Stderr, openedMessage)
}
fmt.Fprintf(os.Stderr, "\n%s\n\n", url)
fmt.Fprintln(os.Stderr, resumeMessage)
return config.Exchange(ctx, <-code)
}
func GetTokenFromCode(config *oauth2.Config, code string) (*oauth2.Token, error) {
token, err := config.Exchange(oauth2.NoContext, code)
if err != nil {
return nil, err
}
return token, nil
}
func handleOAuth2Callback(config *oauth2.Config, s sessions.Session, w http.ResponseWriter, r *http.Request) {
providedState := extractPath(r.URL.Query().Get("state"))
//verify that the provided state is the state we generated
//if it is not, then redirect to the error page
originalState := s.Get(keyState)
if providedState != originalState {
http.Redirect(w, r, PathError, http.StatusFound)
return
}
next := s.Get(keyNextPage).(string)
code := r.URL.Query().Get("code")
t, err := config.Exchange(oauth2.NoContext, code)
if err != nil {
// Pass the error message, or allow dev to provide its own
// error handler.
http.Redirect(w, r, PathError, http.StatusFound)
return
}
// Store the credentials in the session.
val, _ := json.Marshal(t)
s.Set(keyToken, val)
http.Redirect(w, r, next, http.StatusFound)
}
func getClient(config *oauth2.Config, code string) (*drive.Service, error) {
if config == nil {
return nil, errors.New("Google Drive is not configured")
}
token := &oauth2.Token{AccessToken: code}
return drive.New(config.Client(context.Background(), token))
}
// TokenOAuthClient returns an oauth2 client for a specific token
func (c *client) TokenOAuthClient(ctx context.Context, config *oauth2.Config, userToken *oauth2.Token) (client *http.Client, err error) {
if !userToken.Valid() { // if user token is expired
userToken = &oauth2.Token{RefreshToken: userToken.RefreshToken}
}
return config.Client(ctx, userToken), err
}
// Your credentials should be obtained from the Google
// Developer Console (https://console.developers.google.com).
func OauthURL(conf *oauth2.Config) string {
// Redirect user to Google's consent page to ask for permission
// for the scopes specified above.
url := conf.AuthCodeURL("state")
log.Debugf("\nVisit the URL for the auth dialog: %v\n", url)
return url
}
// getClient uses a Context and Config to retrieve a Token
// then generate a Client. It returns the generated Client.
func getSheetClient(ctx context.Context, authConfig *oauth2.Config) *http.Client {
tok, err := tokenFromFile(config.SheetCredentials)
if err != nil {
tok = getTokenFromWeb(authConfig)
saveToken(config.SheetCredentials, tok)
}
return authConfig.Client(ctx, tok)
}
// NewClientTokenTLS returns a client at the specified url that
// authenticates all outbound requests with the given token and
// tls.Config if provided.
func NewClientTokenTLS(uri, token string, c *tls.Config) Client {
config := new(oauth2.Config)
auther := config.Client(oauth2.NoContext, &oauth2.Token{AccessToken: token})
if c != nil {
auther.Transport.(*oauth2.Transport).Base = &http.Transport{TLSClientConfig: c}
}
return &client{auther, uri}
}
func createClient(cfg *oauth2.Config) (*http.Client, error) {
tok, err := getToken(cfg)
if err != nil {
return nil, err
}
return cfg.Client(context.Background(), tok), nil
}
// authorize performs user authorization flow, asking for permissions grant.
func authorize(conf *oauth2.Config) (*oauth2.Token, error) {
aurl := conf.AuthCodeURL("unused", oauth2.AccessTypeOffline)
fmt.Printf("Authorize me at following URL, please:\n\n%s\n\nCode: ", aurl)
var code string
if _, err := fmt.Scan(&code); err != nil {
return nil, err
}
return conf.Exchange(context.Background(), code)
}
// Token refreshes the token by using a new client credentials request.
// tokens received this way do not include a refresh token
// Token returns a token or an error.
// Token must be safe for concurrent use by multiple goroutines.
// The returned Token must not be modified.
func (c *tokenSource) Token() (*oauth2.Token, error) {
config := oauth2.Config{
ClientID: c.conf.ClientID,
ClientSecret: c.conf.ClientSecret,
Endpoint: c.conf.Endpoint,
Scopes: c.conf.Scopes,
}
return config.PasswordCredentialsToken(c.ctx, c.conf.Username, c.conf.Password)
}
// GetClient uses a Context and Config to retrieve a Token
// then generate a Client. It returns the generated Client.
func GetClient(ctx context.Context, config *oauth2.Config) *http.Client {
cacheFile := tokenCacheFile()
tok, err := tokenFromFile(cacheFile)
if err != nil {
tok = getTokenFromWeb(config)
saveToken(cacheFile, tok)
}
return config.Client(ctx, tok)
}
// getClient uses a Context and Config to retrieve a Token
// then generate a Client. It returns the generated Client.
func getClient(ctx context.Context, config *oauth2.Config) *http.Client {
cacheFile := filepath.Join("./.credentials", url.QueryEscape("gmail_token.json"))
token, err := tokenFromFile(cacheFile)
if err != nil {
log.Fatalf("Unable to retrieve token from cached credential file. %v", err)
}
return config.Client(ctx, token)
}
func (c *googinitCmd) RunCommand(args []string) error {
var (
err error
clientId string
clientSecret string
oauthConfig *oauth2.Config
)
if c.storageType != "drive" && c.storageType != "cloud" {
return cmdmain.UsageError("Invalid storage type: must be drive for Google Drive or cloud for Google Cloud Storage.")
}
clientId, clientSecret = getClientInfo()
switch c.storageType {
case "drive":
oauthConfig = &oauth2.Config{
Scopes: []string{drive.Scope},
Endpoint: google.Endpoint,
ClientID: clientId,
ClientSecret: clientSecret,
RedirectURL: oauthutil.TitleBarRedirectURL,
}
case "cloud":
oauthConfig = &oauth2.Config{
Scopes: []string{storage.ScopeReadWrite},
Endpoint: google.Endpoint,
ClientID: clientId,
ClientSecret: clientSecret,
RedirectURL: oauthutil.TitleBarRedirectURL,
}
}
token, err := oauth2.ReuseTokenSource(nil, &oauthutil.TokenSource{
Config: oauthConfig,
AuthCode: func() string {
fmt.Fprintf(cmdmain.Stdout, "Get auth code from:\n\n")
fmt.Fprintf(cmdmain.Stdout, "%v\n\n", oauthConfig.AuthCodeURL("", oauth2.AccessTypeOffline, oauth2.ApprovalForce))
return prompt("Enter auth code:")
},
}).Token()
if err != nil {
return fmt.Errorf("could not acquire token: %v", err)
}
fmt.Fprintf(cmdmain.Stdout, "\nYour Google auth object:\n\n")
enc := json.NewEncoder(cmdmain.Stdout)
authObj := map[string]string{
"client_id": clientId,
"client_secret": clientSecret,
"refresh_token": token.RefreshToken,
}
enc.Encode(authObj)
fmt.Fprint(cmdmain.Stdout, "\n\nFor server-config.json, your 'googlecloudstorage' value (update with your bucket name and path):\n\n")
fmt.Fprintf(cmdmain.Stdout, "%s:%s:%s:bucketName[/optional/dir]\n", clientId, clientSecret, token.RefreshToken)
return nil
}
// overrideCredentials sets the ClientID and ClientSecret from the
// config file if they are not blank
func overrideCredentials(name string, config *oauth2.Config) {
ClientID := fs.ConfigFile.MustValue(name, ConfigClientID)
if ClientID != "" {
config.ClientID = ClientID
}
ClientSecret := fs.ConfigFile.MustValue(name, ConfigClientSecret)
if ClientSecret != "" {
config.ClientSecret = ClientSecret
}
}