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7a8e299c7c
* migrate gplus to google oauth2 provider. this still provides support for old gplus connections. * Update models/oauth2.go Co-Authored-By: Antoine GIRARD <sapk@users.noreply.github.com> * make vendor
181 lines
4.9 KiB
Go
181 lines
4.9 KiB
Go
// Package google implements the OAuth2 protocol for authenticating users
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// through Google.
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package google
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import (
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"encoding/json"
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"fmt"
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"io/ioutil"
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"net/http"
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"net/url"
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"strings"
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"github.com/markbates/goth"
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"golang.org/x/oauth2"
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)
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const endpointProfile string = "https://www.googleapis.com/oauth2/v2/userinfo"
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// New creates a new Google provider, and sets up important connection details.
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// You should always call `google.New` to get a new Provider. Never try to create
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// one manually.
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func New(clientKey, secret, callbackURL string, scopes ...string) *Provider {
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p := &Provider{
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ClientKey: clientKey,
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Secret: secret,
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CallbackURL: callbackURL,
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providerName: "google",
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}
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p.config = newConfig(p, scopes)
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return p
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}
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// Provider is the implementation of `goth.Provider` for accessing Google.
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type Provider struct {
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ClientKey string
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Secret string
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CallbackURL string
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HTTPClient *http.Client
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config *oauth2.Config
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prompt oauth2.AuthCodeOption
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providerName string
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}
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// Name is the name used to retrieve this provider later.
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func (p *Provider) Name() string {
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return p.providerName
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}
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// SetName is to update the name of the provider (needed in case of multiple providers of 1 type)
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func (p *Provider) SetName(name string) {
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p.providerName = name
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}
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// Client returns an HTTP client to be used in all fetch operations.
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func (p *Provider) Client() *http.Client {
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return goth.HTTPClientWithFallBack(p.HTTPClient)
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}
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// Debug is a no-op for the google package.
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func (p *Provider) Debug(debug bool) {}
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// BeginAuth asks Google for an authentication endpoint.
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func (p *Provider) BeginAuth(state string) (goth.Session, error) {
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var opts []oauth2.AuthCodeOption
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if p.prompt != nil {
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opts = append(opts, p.prompt)
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}
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url := p.config.AuthCodeURL(state, opts...)
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session := &Session{
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AuthURL: url,
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}
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return session, nil
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}
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type googleUser struct {
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ID string `json:"id"`
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Email string `json:"email"`
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Name string `json:"name"`
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FirstName string `json:"given_name"`
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LastName string `json:"family_name"`
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Link string `json:"link"`
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Picture string `json:"picture"`
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}
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// FetchUser will go to Google and access basic information about the user.
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func (p *Provider) FetchUser(session goth.Session) (goth.User, error) {
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sess := session.(*Session)
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user := goth.User{
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AccessToken: sess.AccessToken,
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Provider: p.Name(),
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RefreshToken: sess.RefreshToken,
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ExpiresAt: sess.ExpiresAt,
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}
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if user.AccessToken == "" {
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// Data is not yet retrieved, since accessToken is still empty.
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return user, fmt.Errorf("%s cannot get user information without accessToken", p.providerName)
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}
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response, err := p.Client().Get(endpointProfile + "?access_token=" + url.QueryEscape(sess.AccessToken))
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if err != nil {
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return user, err
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}
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defer response.Body.Close()
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if response.StatusCode != http.StatusOK {
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return user, fmt.Errorf("%s responded with a %d trying to fetch user information", p.providerName, response.StatusCode)
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}
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responseBytes, err := ioutil.ReadAll(response.Body)
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if err != nil {
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return user, err
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}
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var u googleUser
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if err := json.Unmarshal(responseBytes, &u); err != nil {
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return user, err
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}
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// Extract the user data we got from Google into our goth.User.
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user.Name = u.Name
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user.FirstName = u.FirstName
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user.LastName = u.LastName
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user.NickName = u.Name
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user.Email = u.Email
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user.AvatarURL = u.Picture
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user.UserID = u.ID
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// Google provides other useful fields such as 'hd'; get them from RawData
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if err := json.Unmarshal(responseBytes, &user.RawData); err != nil {
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return user, err
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}
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return user, nil
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}
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func newConfig(provider *Provider, scopes []string) *oauth2.Config {
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c := &oauth2.Config{
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ClientID: provider.ClientKey,
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ClientSecret: provider.Secret,
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RedirectURL: provider.CallbackURL,
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Endpoint: Endpoint,
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Scopes: []string{},
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}
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if len(scopes) > 0 {
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for _, scope := range scopes {
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c.Scopes = append(c.Scopes, scope)
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}
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} else {
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c.Scopes = []string{"email"}
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}
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return c
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}
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//RefreshTokenAvailable refresh token is provided by auth provider or not
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func (p *Provider) RefreshTokenAvailable() bool {
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return true
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}
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//RefreshToken get new access token based on the refresh token
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func (p *Provider) RefreshToken(refreshToken string) (*oauth2.Token, error) {
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token := &oauth2.Token{RefreshToken: refreshToken}
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ts := p.config.TokenSource(goth.ContextForClient(p.Client()), token)
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newToken, err := ts.Token()
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if err != nil {
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return nil, err
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}
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return newToken, err
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}
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// SetPrompt sets the prompt values for the google OAuth call. Use this to
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// force users to choose and account every time by passing "select_account",
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// for example.
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// See https://developers.google.com/identity/protocols/OpenIDConnect#authenticationuriparameters
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func (p *Provider) SetPrompt(prompt ...string) {
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if len(prompt) == 0 {
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return
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}
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p.prompt = oauth2.SetAuthURLParam("prompt", strings.Join(prompt, " "))
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}
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