// CallbackHandler handles OAuth1 callback requests by parsing the oauth token
// and verifier, reading the request token secret from the ctx, then obtaining
// an access token and adding it to the ctx.
func CallbackHandler(config *oauth1.Config, success, failure ctxh.ContextHandler) ctxh.ContextHandler {
if failure == nil {
failure = gologin.DefaultFailureHandler
}
fn := func(ctx context.Context, w http.ResponseWriter, req *http.Request) {
requestToken, verifier, err := oauth1.ParseAuthorizationCallback(req)
if err != nil {
ctx = gologin.WithError(ctx, err)
failure.ServeHTTP(ctx, w, req)
return
}
// upstream handler should add the request token secret from the login step
_, requestSecret, err := RequestTokenFromContext(ctx)
if err != nil {
ctx = gologin.WithError(ctx, err)
failure.ServeHTTP(ctx, w, req)
return
}
accessToken, accessSecret, err := config.AccessToken(requestToken, requestSecret, verifier)
if err != nil {
ctx = gologin.WithError(ctx, err)
failure.ServeHTTP(ctx, w, req)
return
}
ctx = WithAccessToken(ctx, accessToken, accessSecret)
success.ServeHTTP(ctx, w, req)
}
return ctxh.ContextHandlerFunc(fn)
}
