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callback.go
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// Copyright © 2019 The Things Network Foundation, The Things Industries B.V.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package console
import (
"net/http"
echo "github.com/labstack/echo/v4"
)
// Callback is the OAuth callback that accepts the authorization code
// and exchanges it for an access token (+ refresh token). The access token is
// stored in the authorization cookie for later reference.
func (console *Console) Callback(c echo.Context) error {
if e := c.QueryParam("error"); e != "" {
return echo.NewHTTPError(http.StatusUnauthorized, c.QueryParam("error_description"))
}
state := c.QueryParam("state")
if state == "" {
return echo.NewHTTPError(http.StatusBadRequest, "No state parameter present in request")
}
code := c.QueryParam("code")
if code == "" {
return echo.NewHTTPError(http.StatusBadRequest, "No code parameter present in request")
}
stateCookie, err := console.getStateCookie(c)
if err != nil {
return err
}
if stateCookie.Secret != state {
return echo.NewHTTPError(http.StatusBadRequest, "Invalid state")
}
// Exchange token.
token, err := console.oauth(c).Exchange(c.Request().Context(), code)
if err != nil {
return err
}
// Remove state cookie.
console.removeStateCookie(c)
err = console.setAuthCookie(c, authCookie{
AccessToken: token.AccessToken,
RefreshToken: token.RefreshToken,
Expiry: token.Expiry,
})
if err != nil {
return err
}
return c.Redirect(http.StatusFound, console.configFromContext(c.Request().Context()).UI.CanonicalURL+stateCookie.Next)
}