/
facebook.go
89 lines (80 loc) · 1.68 KB
/
facebook.go
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package auth
import (
"context"
"net/http"
"github.com/dghubble/gologin/v2"
"github.com/dghubble/gologin/v2/facebook"
"github.com/dghubble/gologin/v2/oauth2"
"github.com/dghubble/sling"
oauth2Facebook "golang.org/x/oauth2/facebook"
)
const facebookAPI = "https://graph.facebook.com/v3.0/"
// Facebook provides a Provider implementation for Facebook auth.
type Facebook struct {
providerData
}
func NewFacebook(cfg *Config) *Facebook {
f := &Facebook{}
f.init(f, cfg, oauth2Facebook.Endpoint, []string{"email"})
return f
}
func (f *Facebook) Name() string {
return "facebook"
}
func (f *Facebook) LoginHandler() http.Handler {
return facebook.StateHandler(
gologin.DebugOnlyCookieConfig,
facebook.LoginHandler(
f.config,
f.errorHandler,
),
)
}
func (f *Facebook) CallbackHandler() http.Handler {
return facebook.StateHandler(
gologin.DebugOnlyCookieConfig,
facebook.CallbackHandler(
f.config,
f.successHandler,
f.errorHandler,
),
)
}
func (f *Facebook) User(ctx context.Context) (*User, error) {
u, err := facebook.UserFromContext(ctx)
if err != nil {
return nil, err
}
t, err := oauth2.TokenFromContext(ctx)
if err != nil {
return nil, err
}
var (
client = f.config.Client(ctx, t)
p = &struct {
Data struct {
URL string `json:"url"`
} `json:"data"`
}{}
)
_, err = sling.
New().
Client(client).
Base(facebookAPI).
Set("Accept", "application/json").
Get("me/picture?redirect=false&type=large").
ReceiveSuccess(p)
if err != nil {
return nil, err
}
r, err := client.Get(p.Data.URL)
if err != nil {
return nil, err
}
return &User{
ID: u.ID,
Name: u.Name,
Email: u.Email,
Picture: r.Body,
}, nil
}