85 lines
2.0 KiB
Go
85 lines
2.0 KiB
Go
package providers
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import (
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"errors"
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"fmt"
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"net/http"
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"net/url"
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"github.com/pusher/oauth2_proxy/api"
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)
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// FacebookProvider represents an Facebook based Identity Provider
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type FacebookProvider struct {
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*ProviderData
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}
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// NewFacebookProvider initiates a new FacebookProvider
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func NewFacebookProvider(p *ProviderData) *FacebookProvider {
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p.ProviderName = "Facebook"
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if p.LoginURL.String() == "" {
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p.LoginURL = &url.URL{Scheme: "https",
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Host: "www.facebook.com",
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Path: "/v2.5/dialog/oauth",
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// ?granted_scopes=true
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}
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}
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if p.RedeemURL.String() == "" {
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p.RedeemURL = &url.URL{Scheme: "https",
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Host: "graph.facebook.com",
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Path: "/v2.5/oauth/access_token",
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}
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}
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if p.ProfileURL.String() == "" {
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p.ProfileURL = &url.URL{Scheme: "https",
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Host: "graph.facebook.com",
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Path: "/v2.5/me",
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}
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}
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if p.ValidateURL.String() == "" {
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p.ValidateURL = p.ProfileURL
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}
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if p.Scope == "" {
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p.Scope = "public_profile email"
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}
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return &FacebookProvider{ProviderData: p}
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}
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func getFacebookHeader(accessToken string) http.Header {
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header := make(http.Header)
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header.Set("Accept", "application/json")
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header.Set("x-li-format", "json")
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header.Set("Authorization", fmt.Sprintf("Bearer %s", accessToken))
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return header
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}
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// GetEmailAddress returns the Account email address
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func (p *FacebookProvider) GetEmailAddress(s *SessionState) (string, error) {
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if s.AccessToken == "" {
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return "", errors.New("missing access token")
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}
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req, err := http.NewRequest("GET", p.ProfileURL.String()+"?fields=name,email", nil)
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if err != nil {
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return "", err
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}
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req.Header = getFacebookHeader(s.AccessToken)
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type result struct {
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Email string
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}
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var r result
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err = api.RequestJSON(req, &r)
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if err != nil {
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return "", err
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}
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if r.Email == "" {
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return "", errors.New("no email")
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}
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return r.Email, nil
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}
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// ValidateSessionState validates the AccessToken
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func (p *FacebookProvider) ValidateSessionState(s *SessionState) bool {
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return validateToken(p, s.AccessToken, getFacebookHeader(s.AccessToken))
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}
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