60 lines
1.4 KiB
Go
60 lines
1.4 KiB
Go
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package facebook
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import (
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"encoding/json"
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"errors"
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"strings"
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"time"
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"github.com/markbates/goth"
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)
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// Session stores data during the auth process with Facebook.
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type Session struct {
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AuthURL string
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AccessToken string
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ExpiresAt time.Time
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}
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// GetAuthURL will return the URL set by calling the `BeginAuth` function on the Facebook provider.
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func (s Session) GetAuthURL() (string, error) {
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if s.AuthURL == "" {
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return "", errors.New(goth.NoAuthUrlErrorMessage)
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}
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return s.AuthURL, nil
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}
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// Authorize the session with Facebook and return the access token to be stored for future use.
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func (s *Session) Authorize(provider goth.Provider, params goth.Params) (string, error) {
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p := provider.(*Provider)
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token, err := p.config.Exchange(goth.ContextForClient(p.Client()), params.Get("code"))
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if err != nil {
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return "", err
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}
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if !token.Valid() {
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return "", errors.New("Invalid token received from provider")
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}
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s.AccessToken = token.AccessToken
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s.ExpiresAt = token.Expiry
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return token.AccessToken, err
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}
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// Marshal the session into a string
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func (s Session) Marshal() string {
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b, _ := json.Marshal(s)
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return string(b)
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}
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func (s Session) String() string {
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return s.Marshal()
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}
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// UnmarshalSession will unmarshal a JSON string into a session.
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func (p *Provider) UnmarshalSession(data string) (goth.Session, error) {
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sess := &Session{}
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err := json.NewDecoder(strings.NewReader(data)).Decode(sess)
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return sess, err
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}
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